added documentation for rbcs-servlet

switched Docker images to serial GC

docker/Dockerfile

@@ -5,7 +5,7 @@ WORKDIR /home/luser
 
 FROM base-release AS release
 ADD rbcs-cli-envelope-*.jar rbcs.jar
-ENTRYPOINT ["java", "-XX:+UseZGC", "-XX:+ZGenerational", "-jar", "/home/luser/rbcs.jar", "server"]
+ENTRYPOINT ["java", "-XX:+UseSerialGC", "-XX:GCTimeRatio=24", "-jar", "/home/luser/rbcs.jar", "server"]
 
 FROM base-release AS release-memcache
 ADD --chown=luser:luser rbcs-cli-envelope-*.jar rbcs.jar
@@ -13,4 +13,4 @@ RUN mkdir plugins
 WORKDIR /home/luser/plugins
 RUN --mount=type=bind,source=.,target=/build/distributions tar -xf /build/distributions/rbcs-server-memcache*.tar
 WORKDIR /home/luser
-ENTRYPOINT ["java", "-XX:+UseZGC", "-XX:+ZGenerational", "-jar", "/home/luser/rbcs.jar", "server"]
+ENTRYPOINT ["java", "-XX:+UseSerialGC", "-XX:GCTimeRatio=24", "-jar", "/home/luser/rbcs.jar", "server"]

gradle.properties

@@ -2,11 +2,10 @@ org.gradle.configuration-cache=false
 org.gradle.parallel=true
 org.gradle.caching=true
 
-rbcs.version = 0.1.4
+rbcs.version = 0.2.0
 
-lys.version = 2025.02.05
+lys.version = 2025.02.08
 
 gitea.maven.url = https://gitea.woggioni.net/api/packages/woggioni/maven
 docker.registry.url=gitea.woggioni.net
 
-jpms-check.configurationName = runtimeClasspath

rbcs-api/build.gradle

@@ -6,6 +6,7 @@ plugins {
 
 dependencies {
     api catalog.netty.buffer
+    api catalog.netty.handler
 }
 
 publishing {

rbcs-api/src/main/java/module-info.java

@@ -2,6 +2,9 @@ module net.woggioni.rbcs.api {
     requires static lombok;
     requires java.xml;
     requires io.netty.buffer;
+    requires io.netty.handler;
+    requires io.netty.transport;
     exports net.woggioni.rbcs.api;
     exports net.woggioni.rbcs.api.exception;
+    exports net.woggioni.rbcs.api.message;
 }

rbcs-api/src/main/java/net/woggioni/rbcs/api/Cache.java

@@ -1,14 +0,0 @@
-package net.woggioni.rbcs.api;
-
-import io.netty.buffer.ByteBuf;
-import net.woggioni.rbcs.api.exception.ContentTooLargeException;
-
-import java.nio.channels.ReadableByteChannel;
-import java.util.concurrent.CompletableFuture;
-
-
-public interface Cache extends AutoCloseable {
-    CompletableFuture<ReadableByteChannel> get(String key);
-
-    CompletableFuture<Void> put(String key, ByteBuf content) throws ContentTooLargeException;
-}

rbcs-api/src/main/java/net/woggioni/rbcs/api/CacheHandlerFactory.java

@@ -0,0 +1,7 @@
+package net.woggioni.rbcs.api;
+
+import io.netty.channel.ChannelHandler;
+
+public interface CacheHandlerFactory extends AutoCloseable {
+    ChannelHandler newHandler();
+}

rbcs-api/src/main/java/net/woggioni/rbcs/api/CacheValueMetadata.java

@@ -0,0 +1,14 @@
+package net.woggioni.rbcs.api;
+
+import lombok.Getter;
+import lombok.RequiredArgsConstructor;
+
+import java.io.Serializable;
+
+@Getter
+@RequiredArgsConstructor
+public class CacheValueMetadata implements Serializable {
+    private final String contentDisposition;
+    private final String mimeType;
+}
+

rbcs-api/src/main/java/net/woggioni/rbcs/api/Configuration.java

@@ -135,7 +135,7 @@ public class Configuration {
     }
 
     public interface Cache {
-        net.woggioni.rbcs.api.Cache materialize();
+        CacheHandlerFactory materialize();
         String getNamespaceURI();
         String getTypeName();
     }

rbcs-api/src/main/java/net/woggioni/rbcs/api/message/CacheMessage.java

@@ -0,0 +1,161 @@
+package net.woggioni.rbcs.api.message;
+
+import io.netty.buffer.ByteBuf;
+import io.netty.buffer.ByteBufHolder;
+import lombok.Getter;
+import lombok.RequiredArgsConstructor;
+import net.woggioni.rbcs.api.CacheValueMetadata;
+
+public sealed interface CacheMessage {
+
+    @Getter
+    @RequiredArgsConstructor
+    final class CacheGetRequest implements CacheMessage {
+        private final String key;
+    }
+
+    abstract sealed class CacheGetResponse implements CacheMessage {
+    }
+
+    @Getter
+    @RequiredArgsConstructor
+    final class CacheValueFoundResponse extends CacheGetResponse {
+        private final String key;
+        private final CacheValueMetadata metadata;
+    }
+
+    final class CacheValueNotFoundResponse extends CacheGetResponse {
+    }
+
+    @Getter
+    @RequiredArgsConstructor
+    final class CachePutRequest implements CacheMessage {
+        private final String key;
+        private final CacheValueMetadata metadata;
+    }
+
+    @Getter
+    @RequiredArgsConstructor
+    final class CachePutResponse implements CacheMessage {
+        private final String key;
+    }
+
+    @RequiredArgsConstructor
+    non-sealed class CacheContent implements CacheMessage, ByteBufHolder {
+        protected final ByteBuf chunk;
+
+        @Override
+        public ByteBuf content() {
+            return chunk;
+        }
+
+        @Override
+        public CacheContent copy() {
+            return replace(chunk.copy());
+        }
+
+        @Override
+        public CacheContent duplicate() {
+            return new CacheContent(chunk.duplicate());
+        }
+
+        @Override
+        public CacheContent retainedDuplicate() {
+            return new CacheContent(chunk.retainedDuplicate());
+        }
+
+        @Override
+        public CacheContent replace(ByteBuf content) {
+            return new CacheContent(content);
+        }
+
+        @Override
+        public CacheContent retain() {
+            chunk.retain();
+            return this;
+        }
+
+        @Override
+        public CacheContent retain(int increment) {
+            chunk.retain(increment);
+            return this;
+        }
+
+        @Override
+        public CacheContent touch() {
+            chunk.touch();
+            return this;
+        }
+
+        @Override
+        public CacheContent touch(Object hint) {
+            chunk.touch(hint);
+            return this;
+        }
+
+        @Override
+        public int refCnt() {
+            return chunk.refCnt();
+        }
+
+        @Override
+        public boolean release() {
+            return chunk.release();
+        }
+
+        @Override
+        public boolean release(int decrement) {
+            return chunk.release(decrement);
+        }
+    }
+
+    final class LastCacheContent extends CacheContent {
+        public LastCacheContent(ByteBuf chunk) {
+            super(chunk);
+        }
+
+        @Override
+        public LastCacheContent copy() {
+            return replace(chunk.copy());
+        }
+
+        @Override
+        public LastCacheContent duplicate() {
+            return new LastCacheContent(chunk.duplicate());
+        }
+
+        @Override
+        public LastCacheContent retainedDuplicate() {
+            return new LastCacheContent(chunk.retainedDuplicate());
+        }
+
+        @Override
+        public LastCacheContent replace(ByteBuf content) {
+            return new LastCacheContent(chunk);
+        }
+
+        @Override
+        public LastCacheContent retain() {
+            super.retain();
+            return this;
+        }
+
+        @Override
+        public LastCacheContent retain(int increment) {
+            super.retain(increment);
+            return this;
+        }
+
+        @Override
+        public LastCacheContent touch() {
+            super.touch();
+            return this;
+        }
+
+        @Override
+        public LastCacheContent touch(Object hint) {
+            super.touch(hint);
+            return this;
+        }
+    }
+}

rbcs-cli/build.gradle

@@ -44,7 +44,6 @@ envelopeJar {
 dependencies {
     implementation catalog.jwo
     implementation catalog.slf4j.api
-    implementation catalog.netty.codec.http
     implementation catalog.picocli
 
     implementation project(':rbcs-client')

rbcs-cli/src/main/kotlin/net/woggioni/rbcs/cli/RemoteBuildCacheServerCli.kt

@@ -1,5 +1,6 @@
 package net.woggioni.rbcs.cli
 
+import net.woggioni.jwo.Application
 import net.woggioni.rbcs.cli.impl.AbstractVersionProvider
 import net.woggioni.rbcs.cli.impl.RbcsCommand
 import net.woggioni.rbcs.cli.impl.commands.BenchmarkCommand
@@ -11,7 +12,6 @@ import net.woggioni.rbcs.cli.impl.commands.PutCommand
 import net.woggioni.rbcs.cli.impl.commands.ServerCommand
 import net.woggioni.rbcs.common.RbcsUrlStreamHandlerFactory
 import net.woggioni.rbcs.common.contextLogger
-import net.woggioni.jwo.Application
 import picocli.CommandLine
 import picocli.CommandLine.Model.CommandSpec
 

rbcs-cli/src/main/kotlin/net/woggioni/rbcs/cli/impl/commands/BenchmarkCommand.kt

@@ -1,15 +1,20 @@
 package net.woggioni.rbcs.cli.impl.commands
 
+import net.woggioni.jwo.JWO
+import net.woggioni.jwo.LongMath
+import net.woggioni.rbcs.api.CacheValueMetadata
 import net.woggioni.rbcs.cli.impl.RbcsCommand
+import net.woggioni.rbcs.cli.impl.converters.ByteSizeConverter
 import net.woggioni.rbcs.client.RemoteBuildCacheClient
-import net.woggioni.rbcs.common.contextLogger
+import net.woggioni.rbcs.common.createLogger
+import net.woggioni.rbcs.common.debug
 import net.woggioni.rbcs.common.error
 import net.woggioni.rbcs.common.info
-import net.woggioni.jwo.JWO
 import picocli.CommandLine
 import java.security.SecureRandom
 import java.time.Duration
 import java.time.Instant
+import java.time.temporal.ChronoUnit
 import java.util.concurrent.LinkedBlockingQueue
 import java.util.concurrent.Semaphore
 import java.util.concurrent.atomic.AtomicLong
@@ -21,7 +26,9 @@ import kotlin.random.Random
     showDefaultValues = true
 )
 class BenchmarkCommand : RbcsCommand() {
-    private val log = contextLogger()
+    companion object{
+        private val log = createLogger<BenchmarkCommand>()
+    }
 
     @CommandLine.Spec
     private lateinit var spec: CommandLine.Model.CommandSpec
@@ -36,24 +43,36 @@ class BenchmarkCommand : RbcsCommand() {
     @CommandLine.Option(
         names = ["-s", "--size"],
         description = ["Size of a cache value in bytes"],
-        paramLabel = "SIZE"
+        paramLabel = "SIZE",
+        converter = [ByteSizeConverter::class]
     )
     private var size = 0x1000
 
+    @CommandLine.Option(
+        names = ["-r", "--random"],
+        description = ["Insert completely random byte values"]
+    )
+    private var randomValues = false
+
     override fun run() {
         val clientCommand = spec.parent().userObject() as ClientCommand
         val profile = clientCommand.profileName.let { profileName ->
             clientCommand.configuration.profiles[profileName]
                 ?: throw IllegalArgumentException("Profile $profileName does not exist in configuration")
         }
+        val progressThreshold = LongMath.ceilDiv(numberOfEntries.toLong(), 20)
         RemoteBuildCacheClient(profile).use { client ->
 
             val entryGenerator = sequence {
                 val random = Random(SecureRandom.getInstance("NativePRNGNonBlocking").nextLong())
                 while (true) {
                     val key = JWO.bytesToHex(random.nextBytes(16))
-                    val content = random.nextInt().toByte()
+                    val value = if(randomValues) {
-                    val value = ByteArray(size, { _ -> content })
+                        random.nextBytes(size)
+                    } else {
+                        val byteValue = random.nextInt().toByte()
+                        ByteArray(size) {_ -> byteValue}
+                    }
                     yield(key to value)
                 }
             }
@@ -65,13 +84,13 @@ class BenchmarkCommand : RbcsCommand() {
                 val completionCounter = AtomicLong(0)
                 val completionQueue = LinkedBlockingQueue<Pair<String, ByteArray>>(numberOfEntries)
                 val start = Instant.now()
-                val semaphore = Semaphore(profile.maxConnections * 3)
+                val semaphore = Semaphore(profile.maxConnections * 5)
                 val iterator = entryGenerator.take(numberOfEntries).iterator()
                 while (completionCounter.get() < numberOfEntries) {
                     if (iterator.hasNext()) {
                         val entry = iterator.next()
                         semaphore.acquire()
-                        val future = client.put(entry.first, entry.second).thenApply { entry }
+                        val future = client.put(entry.first, entry.second, CacheValueMetadata(null, null)).thenApply { entry }
                         future.whenComplete { result, ex ->
                             if (ex != null) {
                                 log.error(ex.message, ex)
@@ -79,10 +98,15 @@ class BenchmarkCommand : RbcsCommand() {
                                 completionQueue.put(result)
                             }
                             semaphore.release()
-                            completionCounter.incrementAndGet()
+                            val completed = completionCounter.incrementAndGet()
+                            if(completed.mod(progressThreshold) == 0L) {
+                                log.debug {
+                                    "Inserted $completed / $numberOfEntries"
+                                }
+                            }
                         }
                     } else {
-                        Thread.sleep(0)
+                        Thread.sleep(Duration.of(500, ChronoUnit.MILLIS))
                     }
                 }
 
@@ -103,12 +127,13 @@ class BenchmarkCommand : RbcsCommand() {
             }
             if (entries.isNotEmpty()) {
                 val completionCounter = AtomicLong(0)
-                val semaphore = Semaphore(profile.maxConnections * 3)
+                val semaphore = Semaphore(profile.maxConnections * 5)
                 val start = Instant.now()
                 val it = entries.iterator()
                 while (completionCounter.get() < entries.size) {
                     if (it.hasNext()) {
                         val entry = it.next()
+                        semaphore.acquire()
                         val future = client.get(entry.first).thenApply {
                             if (it == null) {
                                 log.error {
@@ -121,11 +146,16 @@ class BenchmarkCommand : RbcsCommand() {
                             }
                         }
                         future.whenComplete { _, _ ->
-                            completionCounter.incrementAndGet()
+                            val completed = completionCounter.incrementAndGet()
+                            if(completed.mod(progressThreshold) == 0L) {
+                                log.debug {
+                                    "Retrieved $completed / ${entries.size}"
+                                }
+                            }
                             semaphore.release()
                         }
                     } else {
-                        Thread.sleep(0)
+                        Thread.sleep(Duration.of(500, ChronoUnit.MILLIS))
                     }
                 }
                 val end = Instant.now()

rbcs-cli/src/main/kotlin/net/woggioni/rbcs/cli/impl/commands/ClientCommand.kt

@@ -1,8 +1,8 @@
 package net.woggioni.rbcs.cli.impl.commands
 
+import net.woggioni.jwo.Application
 import net.woggioni.rbcs.cli.impl.RbcsCommand
 import net.woggioni.rbcs.client.RemoteBuildCacheClient
-import net.woggioni.jwo.Application
 import picocli.CommandLine
 import java.nio.file.Path
 

rbcs-cli/src/main/kotlin/net/woggioni/rbcs/cli/impl/commands/GetCommand.kt

@@ -2,7 +2,7 @@ package net.woggioni.rbcs.cli.impl.commands
 
 import net.woggioni.rbcs.cli.impl.RbcsCommand
 import net.woggioni.rbcs.client.RemoteBuildCacheClient
-import net.woggioni.rbcs.common.contextLogger
+import net.woggioni.rbcs.common.createLogger
 import picocli.CommandLine
 import java.nio.file.Files
 import java.nio.file.Path
@@ -13,7 +13,9 @@ import java.nio.file.Path
     showDefaultValues = true
 )
 class GetCommand : RbcsCommand() {
-    private val log = contextLogger()
+    companion object{
+        private val log = createLogger<GetCommand>()
+    }
 
     @CommandLine.Spec
     private lateinit var spec: CommandLine.Model.CommandSpec

rbcs-cli/src/main/kotlin/net/woggioni/rbcs/cli/impl/commands/HealthCheckCommand.kt

@@ -2,7 +2,7 @@ package net.woggioni.rbcs.cli.impl.commands
 
 import net.woggioni.rbcs.cli.impl.RbcsCommand
 import net.woggioni.rbcs.client.RemoteBuildCacheClient
-import net.woggioni.rbcs.common.contextLogger
+import net.woggioni.rbcs.common.createLogger
 import picocli.CommandLine
 import java.security.SecureRandom
 import kotlin.random.Random
@@ -13,7 +13,9 @@ import kotlin.random.Random
     showDefaultValues = true
 )
 class HealthCheckCommand : RbcsCommand() {
-    private val log = contextLogger()
+    companion object{
+        private val log = createLogger<HealthCheckCommand>()
+    }
 
     @CommandLine.Spec
     private lateinit var spec: CommandLine.Model.CommandSpec
@@ -32,11 +34,12 @@ class HealthCheckCommand : RbcsCommand() {
                 if(value == null) {
                     throw IllegalStateException("Empty response from server")
                 }
+                val offset = value.size - nonce.size
                 for(i in 0 until nonce.size) {
-                    for(j in value.size - nonce.size until nonce.size) {
+                    val a = nonce[i]
-                        if(nonce[i] != value[j]) {
+                    val b = value[offset + i]
-                            throw IllegalStateException("Server nonce does not match")
+                    if(a != b) {
-                        }
+                        throw IllegalStateException("Server nonce does not match")
                     }
                 }
             }.get()

rbcs-cli/src/main/kotlin/net/woggioni/rbcs/cli/impl/commands/PasswordHashCommand.kt

@@ -1,9 +1,9 @@
 package net.woggioni.rbcs.cli.impl.commands
 
+import net.woggioni.jwo.UncloseableOutputStream
 import net.woggioni.rbcs.cli.impl.RbcsCommand
 import net.woggioni.rbcs.cli.impl.converters.OutputStreamConverter
 import net.woggioni.rbcs.common.PasswordSecurity.hashPassword
-import net.woggioni.jwo.UncloseableOutputStream
 import picocli.CommandLine
 import java.io.OutputStream
 import java.io.OutputStreamWriter

rbcs-cli/src/main/kotlin/net/woggioni/rbcs/cli/impl/commands/PutCommand.kt

@@ -1,11 +1,17 @@
 package net.woggioni.rbcs.cli.impl.commands
 
+import net.woggioni.jwo.Hash
+import net.woggioni.jwo.JWO
+import net.woggioni.jwo.NullOutputStream
+import net.woggioni.rbcs.api.CacheValueMetadata
 import net.woggioni.rbcs.cli.impl.RbcsCommand
-import net.woggioni.rbcs.cli.impl.converters.InputStreamConverter
 import net.woggioni.rbcs.client.RemoteBuildCacheClient
-import net.woggioni.rbcs.common.contextLogger
+import net.woggioni.rbcs.common.createLogger
 import picocli.CommandLine
 import java.io.InputStream
+import java.nio.file.Files
+import java.nio.file.Path
+import java.util.UUID
 
 @CommandLine.Command(
     name = "put",
@@ -13,25 +19,41 @@ import java.io.InputStream
     showDefaultValues = true
 )
 class PutCommand : RbcsCommand() {
-    private val log = contextLogger()
+    companion object{
+        private val log = createLogger<PutCommand>()
+    }
+
 
     @CommandLine.Spec
     private lateinit var spec: CommandLine.Model.CommandSpec
 
     @CommandLine.Option(
         names = ["-k", "--key"],
-        description = ["The key for the new value"],
+        description = ["The key for the new value, randomly generated if omitted"],
         paramLabel = "KEY"
     )
-    private var key : String = ""
+    private var key : String? = null
+
+    @CommandLine.Option(
+        names = ["-i", "--inline"],
+        description = ["File is to be displayed in the browser"],
+        paramLabel = "INLINE",
+    )
+    private var inline : Boolean = false
+
+    @CommandLine.Option(
+        names = ["-t", "--type"],
+        description = ["File mime type"],
+        paramLabel = "MIME_TYPE",
+    )
+    private var mimeType : String? = null
 
     @CommandLine.Option(
         names = ["-v", "--value"],
         description = ["Path to a file containing the value to be added (defaults to stdin)"],
         paramLabel = "VALUE_FILE",
-        converter = [InputStreamConverter::class]
     )
-    private var value : InputStream = System.`in`
+    private var value : Path? = null
 
     override fun run() {
         val clientCommand = spec.parent().userObject() as ClientCommand
@@ -40,9 +62,40 @@ class PutCommand : RbcsCommand() {
                 ?: throw IllegalArgumentException("Profile $profileName does not exist in configuration")
         }
         RemoteBuildCacheClient(profile).use { client ->
-            value.use {
+            val inputStream : InputStream
-                client.put(key, it.readAllBytes())
+            val mimeType : String?
+            val contentDisposition : String?
+            val valuePath = value
+            val actualKey : String?
+            if(valuePath != null) {
+                inputStream = Files.newInputStream(valuePath)
+                mimeType = this.mimeType ?: Files.probeContentType(valuePath)
+                contentDisposition = if(inline) {
+                    "inline"
+                } else {
+                    "attachment; filename=\"${valuePath.fileName}\""
+                }
+                actualKey = key ?: let {
+                    val md = Hash.Algorithm.SHA512.newInputStream(Files.newInputStream(valuePath)).use {
+                        JWO.copy(it, NullOutputStream())
+                        it.messageDigest
+                    }
+                    UUID.nameUUIDFromBytes(md.digest()).toString()
+                }
+            } else {
+                inputStream = System.`in`
+                mimeType = this.mimeType
+                contentDisposition = if(inline) {
+                    "inline"
+                } else {
+                    null
+                }
+                actualKey = key ?: UUID.randomUUID().toString()
+            }
+            inputStream.use {
+                client.put(actualKey, it.readAllBytes(), CacheValueMetadata(contentDisposition, mimeType))
             }.get()
+            println(profile.serverURI.resolve(actualKey))
         }
     }
 }

rbcs-cli/src/main/kotlin/net/woggioni/rbcs/cli/impl/commands/ServerCommand.kt

@@ -1,19 +1,20 @@
 package net.woggioni.rbcs.cli.impl.commands
 
+import net.woggioni.jwo.Application
+import net.woggioni.jwo.JWO
 import net.woggioni.rbcs.cli.impl.RbcsCommand
 import net.woggioni.rbcs.cli.impl.converters.DurationConverter
-import net.woggioni.rbcs.common.contextLogger
+import net.woggioni.rbcs.common.createLogger
 import net.woggioni.rbcs.common.debug
 import net.woggioni.rbcs.common.info
 import net.woggioni.rbcs.server.RemoteBuildCacheServer
 import net.woggioni.rbcs.server.RemoteBuildCacheServer.Companion.DEFAULT_CONFIGURATION_URL
-import net.woggioni.jwo.Application
-import net.woggioni.jwo.JWO
 import picocli.CommandLine
 import java.io.ByteArrayOutputStream
 import java.nio.file.Files
 import java.nio.file.Path
 import java.time.Duration
+import java.util.concurrent.TimeUnit
 
 @CommandLine.Command(
     name = "server",
@@ -21,8 +22,9 @@ import java.time.Duration
     showDefaultValues = true
 )
 class ServerCommand(app : Application) : RbcsCommand() {
-
+    companion object {
-    private val log = contextLogger()
+        private val log = createLogger<ServerCommand>()
+    }
 
     private fun createDefaultConfigurationFile(configurationFile: Path) {
         log.info {
@@ -66,11 +68,20 @@ class ServerCommand(app : Application) : RbcsCommand() {
             }
         }
         val server = RemoteBuildCacheServer(configuration)
-        server.run().use { server ->
+        val handle = server.run()
-            timeout?.let {
+        val shutdownHook = Thread.ofPlatform().unstarted {
-                Thread.sleep(it)
+            handle.sendShutdownSignal()
-                server.shutdown()
+            try {
+                handle.get(60, TimeUnit.SECONDS)
+            } catch (ex : Throwable) {
+                log.warn(ex.message, ex)
             }
         }
+        Runtime.getRuntime().addShutdownHook(shutdownHook)
+        if(timeout != null) {
+            Thread.sleep(timeout)
+            handle.sendShutdownSignal()
+        }
+        handle.get()
     }
 }

rbcs-cli/src/main/kotlin/net/woggioni/rbcs/cli/impl/converters/ByteSizeConverter.kt

@@ -0,0 +1,10 @@
+package net.woggioni.rbcs.cli.impl.converters
+
+import picocli.CommandLine
+
+
+class ByteSizeConverter : CommandLine.ITypeConverter<Int> {
+    override fun convert(value: String): Int {
+        return Integer.decode(value)
+    }
+}

rbcs-client/build.gradle

@@ -6,9 +6,11 @@ plugins {
 dependencies {
     implementation project(':rbcs-api')
     implementation project(':rbcs-common')
-    implementation catalog.picocli
     implementation catalog.slf4j.api
     implementation catalog.netty.buffer
+    implementation catalog.netty.handler
+    implementation catalog.netty.transport
+    implementation catalog.netty.common
     implementation catalog.netty.codec.http
 
     testRuntimeOnly catalog.logback.classic

rbcs-client/src/main/kotlin/net/woggioni/rbcs/client/Client.kt

@@ -4,7 +4,9 @@ import io.netty.bootstrap.Bootstrap
 import io.netty.buffer.ByteBuf
 import io.netty.buffer.Unpooled
 import io.netty.channel.Channel
+import io.netty.channel.ChannelHandler
 import io.netty.channel.ChannelHandlerContext
+import io.netty.channel.ChannelInboundHandlerAdapter
 import io.netty.channel.ChannelOption
 import io.netty.channel.ChannelPipeline
 import io.netty.channel.SimpleChannelInboundHandler
@@ -28,13 +30,18 @@ import io.netty.handler.codec.http.HttpVersion
 import io.netty.handler.ssl.SslContext
 import io.netty.handler.ssl.SslContextBuilder
 import io.netty.handler.stream.ChunkedWriteHandler
+import io.netty.handler.timeout.IdleState
+import io.netty.handler.timeout.IdleStateEvent
+import io.netty.handler.timeout.IdleStateHandler
 import io.netty.util.concurrent.Future
 import io.netty.util.concurrent.GenericFutureListener
+import net.woggioni.rbcs.api.CacheValueMetadata
 import net.woggioni.rbcs.client.impl.Parser
 import net.woggioni.rbcs.common.Xml
-import net.woggioni.rbcs.common.contextLogger
+import net.woggioni.rbcs.common.createLogger
 import net.woggioni.rbcs.common.debug
 import net.woggioni.rbcs.common.trace
+import java.io.IOException
 import java.net.InetSocketAddress
 import java.net.URI
 import java.nio.file.Files
@@ -44,14 +51,19 @@ import java.security.cert.X509Certificate
 import java.time.Duration
 import java.util.Base64
 import java.util.concurrent.CompletableFuture
+import java.util.concurrent.TimeUnit
+import java.util.concurrent.TimeoutException
 import java.util.concurrent.atomic.AtomicInteger
+import kotlin.random.Random
 import io.netty.util.concurrent.Future as NettyFuture
 
-
 class RemoteBuildCacheClient(private val profile: Configuration.Profile) : AutoCloseable {
+    companion object{
+        private val log = createLogger<RemoteBuildCacheClient>()
+    }
+
     private val group: NioEventLoopGroup
     private var sslContext: SslContext
-    private val log = contextLogger()
     private val pool: ChannelPool
 
     data class Configuration(
@@ -72,11 +84,21 @@ class RemoteBuildCacheClient(private val profile: Configuration.Profile) : AutoC
             val exp: Double
         )
 
+        class Connection(
+            val readTimeout: Duration,
+            val writeTimeout: Duration,
+            val idleTimeout: Duration,
+            val readIdleTimeout: Duration,
+            val writeIdleTimeout: Duration
+        )
+
         data class Profile(
             val serverURI: URI,
+            val connection: Connection?,
             val authentication: Authentication?,
             val connectionTimeout: Duration?,
             val maxConnections: Int,
+            val compressionEnabled: Boolean,
             val retryPolicy: RetryPolicy?,
         )
 
@@ -141,18 +163,50 @@ class RemoteBuildCacheClient(private val profile: Configuration.Profile) : AutoC
             }
 
             override fun channelCreated(ch: Channel) {
-                val connectionId = connectionCount.getAndIncrement()
+                val connectionId = connectionCount.incrementAndGet()
                 log.debug {
-                    "Created connection $connectionId, total number of active connections: $connectionId"
+                    "Created connection ${ch.id().asShortText()}, total number of active connections: $connectionId"
                 }
                 ch.closeFuture().addListener {
                     val activeConnections = connectionCount.decrementAndGet()
                     log.debug {
-                        "Closed connection $connectionId, total number of active connections: $activeConnections"
+                        "Closed connection ${
+                            ch.id().asShortText()
+                        }, total number of active connections: $activeConnections"
                     }
                 }
                 val pipeline: ChannelPipeline = ch.pipeline()
 
+                profile.connection?.also { conn ->
+                    val readTimeout = conn.readTimeout.toMillis()
+                    val writeTimeout = conn.writeTimeout.toMillis()
+                    if (readTimeout > 0 || writeTimeout > 0) {
+                        pipeline.addLast(
+                            IdleStateHandler(
+                                false,
+                                readTimeout,
+                                writeTimeout,
+                                0,
+                                TimeUnit.MILLISECONDS
+                            )
+                        )
+                    }
+                    val readIdleTimeout = conn.readIdleTimeout.toMillis()
+                    val writeIdleTimeout = conn.writeIdleTimeout.toMillis()
+                    val idleTimeout = conn.idleTimeout.toMillis()
+                    if (readIdleTimeout > 0 || writeIdleTimeout > 0 || idleTimeout > 0) {
+                        pipeline.addLast(
+                            IdleStateHandler(
+                                true,
+                                readIdleTimeout,
+                                writeIdleTimeout,
+                                idleTimeout,
+                                TimeUnit.MILLISECONDS
+                            )
+                        )
+                    }
+                }
+
                 // Add SSL handler if needed
                 if ("https".equals(scheme, ignoreCase = true)) {
                     pipeline.addLast("ssl", sslContext.newHandler(ch.alloc(), host, port))
@@ -160,7 +214,9 @@ class RemoteBuildCacheClient(private val profile: Configuration.Profile) : AutoC
 
                 // HTTP handlers
                 pipeline.addLast("codec", HttpClientCodec())
-                pipeline.addLast("decompressor", HttpContentDecompressor())
+                if(profile.compressionEnabled) {
+                    pipeline.addLast("decompressor", HttpContentDecompressor())
+                }
                 pipeline.addLast("aggregator", HttpObjectAggregator(134217728))
                 pipeline.addLast("chunked", ChunkedWriteHandler())
             }
@@ -206,6 +262,7 @@ class RemoteBuildCacheClient(private val profile: Configuration.Profile) : AutoC
                 retryPolicy.initialDelayMillis.toDouble(),
                 retryPolicy.exp,
                 outcomeHandler,
+                Random.Default,
                 operation
             )
         } else {
@@ -253,9 +310,13 @@ class RemoteBuildCacheClient(private val profile: Configuration.Profile) : AutoC
         }
     }
 
-    fun put(key: String, content: ByteArray): CompletableFuture<Unit> {
+    fun put(key: String, content: ByteArray, metadata: CacheValueMetadata): CompletableFuture<Unit> {
         return executeWithRetry {
-            sendRequest(profile.serverURI.resolve(key), HttpMethod.PUT, content)
+            val extraHeaders = sequenceOf(
+                metadata.mimeType?.let { HttpHeaderNames.CONTENT_TYPE to it },
+                metadata.contentDisposition?.let { HttpHeaderNames.CONTENT_DISPOSITION to it }
+            ).filterNotNull()
+            sendRequest(profile.serverURI.resolve(key), HttpMethod.PUT, content, extraHeaders.asIterable())
         }.thenApply {
             val status = it.status()
             if (it.status() != HttpResponseStatus.CREATED && it.status() != HttpResponseStatus.OK) {
@@ -264,35 +325,83 @@ class RemoteBuildCacheClient(private val profile: Configuration.Profile) : AutoC
         }
     }
 
-    private fun sendRequest(uri: URI, method: HttpMethod, body: ByteArray?): CompletableFuture<FullHttpResponse> {
+    private fun sendRequest(
+        uri: URI,
+        method: HttpMethod,
+        body: ByteArray?,
+        extraHeaders: Iterable<Pair<CharSequence, CharSequence>>? = null
+    ): CompletableFuture<FullHttpResponse> {
         val responseFuture = CompletableFuture<FullHttpResponse>()
         // Custom handler for processing responses
+
         pool.acquire().addListener(object : GenericFutureListener<NettyFuture<Channel>> {
+            private val handlers = mutableListOf<ChannelHandler>()
+
+            fun cleanup(channel: Channel, pipeline: ChannelPipeline) {
+                handlers.forEach(pipeline::remove)
+                pool.release(channel)
+            }
+
             override fun operationComplete(channelFuture: Future<Channel>) {
                 if (channelFuture.isSuccess) {
                     val channel = channelFuture.now
                     val pipeline = channel.pipeline()
-                    channel.pipeline().addLast("handler", object : SimpleChannelInboundHandler<FullHttpResponse>() {
+                    val timeoutHandler = object : ChannelInboundHandlerAdapter() {
+                        override fun userEventTriggered(ctx: ChannelHandlerContext, evt: Any) {
+                            if (evt is IdleStateEvent) {
+                                val te = when (evt.state()) {
+                                    IdleState.READER_IDLE -> TimeoutException(
+                                        "Read timeout",
+                                    )
+
+                                    IdleState.WRITER_IDLE -> TimeoutException("Write timeout")
+
+                                    IdleState.ALL_IDLE -> TimeoutException("Idle timeout")
+                                    null -> throw IllegalStateException("This should never happen")
+                                }
+                                responseFuture.completeExceptionally(te)
+                                ctx.close()
+                            }
+                        }
+                    }
+                    val closeListener = GenericFutureListener<Future<Void>> {
+                        responseFuture.completeExceptionally(IOException("The remote server closed the connection"))
+                        pool.release(channel)
+                    }
+
+                    val responseHandler = object : SimpleChannelInboundHandler<FullHttpResponse>() {
                         override fun channelRead0(
                             ctx: ChannelHandlerContext,
                             response: FullHttpResponse
                         ) {
-                            pipeline.removeLast()
+                            channel.closeFuture().removeListener(closeListener)
-                            pool.release(channel)
+                            cleanup(channel, pipeline)
                             responseFuture.complete(response)
                         }
 
                         override fun exceptionCaught(ctx: ChannelHandlerContext, cause: Throwable) {
+                            ctx.newPromise()
                             val ex = when (cause) {
                                 is DecoderException -> cause.cause
                                 else -> cause
                             }
                             responseFuture.completeExceptionally(ex)
                             ctx.close()
-                            pipeline.removeLast()
-                            pool.release(channel)
                         }
-                    })
+
+                        override fun channelInactive(ctx: ChannelHandlerContext) {
+                            pool.release(channel)
+                            responseFuture.completeExceptionally(IOException("The remote server closed the connection"))
+                            super.channelInactive(ctx)
+                        }
+                    }
+                    for (handler in arrayOf(timeoutHandler, responseHandler)) {
+                        handlers.add(handler)
+                    }
+                    pipeline.addLast(timeoutHandler, responseHandler)
+                    channel.closeFuture().addListener(closeListener)
+
+
                     // Prepare the HTTP request
                     val request: FullHttpRequest = let {
                         val content: ByteBuf? = body?.takeIf(ByteArray::isNotEmpty)?.let(Unpooled::wrappedBuffer)
@@ -304,15 +413,19 @@ class RemoteBuildCacheClient(private val profile: Configuration.Profile) : AutoC
                         ).apply {
                             headers().apply {
                                 if (content != null) {
-                                    set(HttpHeaderNames.CONTENT_TYPE, HttpHeaderValues.APPLICATION_OCTET_STREAM)
                                     set(HttpHeaderNames.CONTENT_LENGTH, content.readableBytes())
                                 }
                                 set(HttpHeaderNames.HOST, profile.serverURI.host)
                                 set(HttpHeaderNames.CONNECTION, HttpHeaderValues.KEEP_ALIVE)
-                                set(
+                                if(profile.compressionEnabled) {
-                                    HttpHeaderNames.ACCEPT_ENCODING,
+                                    set(
-                                    HttpHeaderValues.GZIP.toString() + "," + HttpHeaderValues.DEFLATE.toString()
+                                        HttpHeaderNames.ACCEPT_ENCODING,
-                                )
+                                        HttpHeaderValues.GZIP.toString() + "," + HttpHeaderValues.DEFLATE.toString()
+                                    )
+                                }
+                                extraHeaders?.forEach { (k, v) ->
+                                    add(k, v)
+                                }
                                 // Add basic auth if configured
                                 (profile.authentication as? Configuration.Authentication.BasicAuthenticationCredentials)?.let { credentials ->
                                     val auth = "${credentials.username}:${credentials.password}"

rbcs-client/src/main/kotlin/net/woggioni/rbcs/client/impl/Parser.kt

@@ -12,6 +12,7 @@ import java.security.KeyStore
 import java.security.PrivateKey
 import java.security.cert.X509Certificate
 import java.time.Duration
+import java.time.temporal.ChronoUnit
 
 object Parser {
 
@@ -29,6 +30,7 @@ object Parser {
                         ?: throw ConfigurationException("base-url attribute is required")
                     var authentication: RemoteBuildCacheClient.Configuration.Authentication? = null
                     var retryPolicy: RemoteBuildCacheClient.Configuration.RetryPolicy? = null
+                    var connection : RemoteBuildCacheClient.Configuration.Connection? = null
                     for (gchild in child.asIterable()) {
                         when (gchild.localName) {
                             "tls-client-auth" -> {
@@ -86,6 +88,26 @@ object Parser {
                                     exp.toDouble()
                                 )
                             }
+
+                            "connection" -> {
+                                val writeTimeout = gchild.renderAttribute("write-timeout")
+                                    ?.let(Duration::parse) ?: Duration.of(0, ChronoUnit.SECONDS)
+                                val readTimeout = gchild.renderAttribute("read-timeout")
+                                    ?.let(Duration::parse) ?: Duration.of(0, ChronoUnit.SECONDS)
+                                val idleTimeout = gchild.renderAttribute("idle-timeout")
+                                    ?.let(Duration::parse) ?: Duration.of(30, ChronoUnit.SECONDS)
+                                val readIdleTimeout = gchild.renderAttribute("read-idle-timeout")
+                                    ?.let(Duration::parse) ?: Duration.of(60, ChronoUnit.SECONDS)
+                                val writeIdleTimeout = gchild.renderAttribute("write-idle-timeout")
+                                    ?.let(Duration::parse) ?: Duration.of(60, ChronoUnit.SECONDS)
+                                connection = RemoteBuildCacheClient.Configuration.Connection(
+                                    readTimeout,
+                                    writeTimeout,
+                                    idleTimeout,
+                                    readIdleTimeout,
+                                    writeIdleTimeout,
+                                )
+                            }
                         }
                     }
                     val maxConnections = child.renderAttribute("max-connections")
@@ -93,11 +115,17 @@ object Parser {
                         ?: 50
                     val connectionTimeout = child.renderAttribute("connection-timeout")
                         ?.let(Duration::parse)
+                    val compressionEnabled = child.renderAttribute("enable-compression")
+                        ?.let(String::toBoolean)
+                        ?: true
+
                     profiles[name] = RemoteBuildCacheClient.Configuration.Profile(
                         uri,
+                        connection,
                         authentication,
                         connectionTimeout,
                         maxConnections,
+                        compressionEnabled,
                         retryPolicy
                     )
                 }

rbcs-client/src/main/kotlin/net/woggioni/rbcs/client/retry.kt

@@ -3,6 +3,8 @@ package net.woggioni.rbcs.client
 import io.netty.util.concurrent.EventExecutorGroup
 import java.util.concurrent.CompletableFuture
 import java.util.concurrent.TimeUnit
+import kotlin.math.pow
+import kotlin.random.Random
 
 sealed class OperationOutcome<T> {
     class Success<T>(val result: T) : OperationOutcome<T>()
@@ -24,8 +26,10 @@ fun <T> executeWithRetry(
     initialDelay: Double,
     exp: Double,
     outcomeHandler: OutcomeHandler<T>,
+    randomizer : Random?,
     cb: () -> CompletableFuture<T>
 ): CompletableFuture<T> {
+
     val finalResult = cb()
     var future = finalResult
     var shortCircuit = false
@@ -46,7 +50,7 @@ fun <T> executeWithRetry(
                     is OutcomeHandlerResult.Retry -> {
                         val res = CompletableFuture<T>()
                         val delay = run {
-                            val scheduledDelay = (initialDelay * Math.pow(exp, i.toDouble())).toLong()
+                            val scheduledDelay = (initialDelay * exp.pow(i.toDouble()) * (1.0 + (randomizer?.nextDouble(-0.5, 0.5) ?: 0.0))).toLong()
                             outcomeHandlerResult.suggestedDelayMillis?.coerceAtMost(scheduledDelay) ?: scheduledDelay
                         }
                         eventExecutorGroup.schedule({

rbcs-client/src/main/resources/net/woggioni/rbcs/client/schema/rbcs-client.xsd

@@ -19,12 +19,22 @@
                 <xs:element name="basic-auth" type="rbcs-client:basicAuthType"/>
                 <xs:element name="tls-client-auth" type="rbcs-client:tlsClientAuthType"/>
             </xs:choice>
+            <xs:element name="connection" type="rbcs-client:connectionType" minOccurs="0" />
             <xs:element name="retry-policy" type="rbcs-client:retryType" minOccurs="0"/>
         </xs:sequence>
         <xs:attribute name="name" type="xs:token" use="required"/>
         <xs:attribute name="base-url" type="xs:anyURI" use="required"/>
         <xs:attribute name="max-connections" type="xs:positiveInteger" default="50"/>
         <xs:attribute name="connection-timeout" type="xs:duration"/>
+        <xs:attribute name="enable-compression" type="xs:boolean" default="true"/>
+    </xs:complexType>
+
+    <xs:complexType name="connectionType">
+        <xs:attribute name="read-timeout" type="xs:duration" use="optional" default="PT0S"/>
+        <xs:attribute name="write-timeout" type="xs:duration" use="optional" default="PT0S"/>
+        <xs:attribute name="idle-timeout" type="xs:duration" use="optional" default="PT30S"/>
+        <xs:attribute name="read-idle-timeout" type="xs:duration" use="optional" default="PT60S"/>
+        <xs:attribute name="write-idle-timeout" type="xs:duration" use="optional" default="PT60S"/>
     </xs:complexType>
 
     <xs:complexType name="noAuthType"/>

rbcs-client/src/test/kotlin/net/woggioni/rbcs/client/RetryTest.kt

@@ -89,7 +89,7 @@ class RetryTest {
         val random = Random(testArgs.seed)
 
         val future =
-            executeWithRetry(executor, testArgs.maxAttempt, testArgs.initialDelay, testArgs.exp, outcomeHandler) {
+            executeWithRetry(executor, testArgs.maxAttempt, testArgs.initialDelay, testArgs.exp, outcomeHandler, null) {
                 val now = System.nanoTime()
                 val result = CompletableFuture<Int>()
                 executor.submit {
@@ -129,7 +129,7 @@ class RetryTest {
                     previousAttempt.first + testArgs.initialDelay * Math.pow(testArgs.exp, index.toDouble()) * 1e6
                 val actualTimestamp = timestamp
                 val err = Math.abs(expectedTimestamp - actualTimestamp) / expectedTimestamp
-                Assertions.assertTrue(err < 1e-3)
+                Assertions.assertTrue(err < 1e-2)
             }
             if (index == attempts.size - 1 && index < testArgs.maxAttempt - 1) {
                 /*

rbcs-common/src/main/java/module-info.java

@@ -5,6 +5,7 @@ module net.woggioni.rbcs.common {
     requires kotlin.stdlib;
     requires net.woggioni.jwo;
     requires io.netty.buffer;
+    requires io.netty.transport;
 
     provides java.net.spi.URLStreamHandlerProvider with net.woggioni.rbcs.common.RbcsUrlStreamHandlerFactory;
     exports net.woggioni.rbcs.common;

rbcs-common/src/main/kotlin/net/woggioni/rbcs/common/BB.kt

@@ -0,0 +1,15 @@
+package net.woggioni.rbcs.common
+
+import io.netty.buffer.ByteBuf
+import io.netty.buffer.ByteBufAllocator
+import io.netty.buffer.CompositeByteBuf
+
+fun extractChunk(buf: CompositeByteBuf, alloc: ByteBufAllocator): ByteBuf {
+    val chunk = alloc.compositeBuffer()
+    for (component in buf.decompose(0, buf.readableBytes())) {
+        chunk.addComponent(true, component.retain())
+    }
+    buf.removeComponents(0, buf.numComponents())
+    buf.clear()
+    return chunk
+}

rbcs-common/src/main/kotlin/net/woggioni/rbcs/common/Logging.kt

@@ -1,90 +1,173 @@
 package net.woggioni.rbcs.common
 
+import io.netty.channel.Channel
+import io.netty.channel.ChannelHandlerContext
 import org.slf4j.Logger
 import org.slf4j.LoggerFactory
+import org.slf4j.MDC
 import org.slf4j.event.Level
+import org.slf4j.spi.LoggingEventBuilder
 import java.nio.file.Files
 import java.nio.file.Path
 import java.util.logging.LogManager
 
 inline fun <reified T> T.contextLogger() = LoggerFactory.getLogger(T::class.java)
+inline fun <reified T> createLogger() = LoggerFactory.getLogger(T::class.java)
 
-inline fun Logger.traceParam(messageBuilder : () -> Pair<String, Array<Any>>) {
+inline fun Logger.traceParam(messageBuilder: () -> Pair<String, Array<Any>>) {
-    if(isTraceEnabled) {
+    if (isTraceEnabled) {
         val (format, params) = messageBuilder()
         trace(format, params)
     }
 }
 
-inline fun Logger.debugParam(messageBuilder : () -> Pair<String, Array<Any>>) {
+inline fun Logger.debugParam(messageBuilder: () -> Pair<String, Array<Any>>) {
-    if(isDebugEnabled) {
+    if (isDebugEnabled) {
         val (format, params) = messageBuilder()
         info(format, params)
     }
 }
 
-inline fun Logger.infoParam(messageBuilder : () -> Pair<String, Array<Any>>) {
+inline fun Logger.infoParam(messageBuilder: () -> Pair<String, Array<Any>>) {
-    if(isInfoEnabled) {
+    if (isInfoEnabled) {
         val (format, params) = messageBuilder()
         info(format, params)
     }
 }
 
-inline fun Logger.warnParam(messageBuilder : () -> Pair<String, Array<Any>>) {
+inline fun Logger.warnParam(messageBuilder: () -> Pair<String, Array<Any>>) {
-    if(isWarnEnabled) {
+    if (isWarnEnabled) {
         val (format, params) = messageBuilder()
         warn(format, params)
     }
 }
 
-inline fun Logger.errorParam(messageBuilder : () -> Pair<String, Array<Any>>) {
+inline fun Logger.errorParam(messageBuilder: () -> Pair<String, Array<Any>>) {
-    if(isErrorEnabled) {
+    if (isErrorEnabled) {
         val (format, params) = messageBuilder()
         error(format, params)
     }
 }
 
 
-inline fun log(log : Logger,
+inline fun log(
-               filter : Logger.() -> Boolean,
+    log: Logger,
-               loggerMethod : Logger.(String) -> Unit, messageBuilder : () -> String) {
+    filter: Logger.() -> Boolean,
-    if(log.filter()) {
+    loggerMethod: Logger.(String) -> Unit, messageBuilder: () -> String
+) {
+    if (log.filter()) {
         log.loggerMethod(messageBuilder())
     }
 }
 
-inline fun Logger.log(level : Level, messageBuilder : () -> String) {
+fun withMDC(params: Array<Pair<String, String>>, cb: () -> Unit) {
-    if(isEnabledForLevel(level)) {
+    object : AutoCloseable {
+        override fun close() {
+            for ((key, _) in params) MDC.remove(key)
+        }
+    }.use {
+        for ((key, value) in params) MDC.put(key, value)
+        cb()
+    }
+}
+
+inline fun Logger.log(level: Level, channel: Channel, crossinline messageBuilder: (LoggingEventBuilder) -> Unit ) {
+    if (isEnabledForLevel(level)) {
+        val params = arrayOf<Pair<String, String>>(
+            "channel-id-short" to channel.id().asShortText(),
+            "channel-id-long" to channel.id().asLongText(),
+            "remote-address" to channel.remoteAddress().toString(),
+            "local-address" to channel.localAddress().toString(),
+        )
+        withMDC(params) {
+            val builder = makeLoggingEventBuilder(level)
+//            for ((key, value) in params) {
+//                builder.addKeyValue(key, value)
+//            }
+            messageBuilder(builder)
+            builder.log()
+        }
+    }
+}
+inline fun Logger.log(level: Level, channel: Channel, crossinline messageBuilder: () -> String) {
+    log(level, channel) { builder ->
+        builder.setMessage(messageBuilder())
+    }
+}
+
+inline fun Logger.trace(ch: Channel, crossinline messageBuilder: () -> String) {
+    log(Level.TRACE, ch, messageBuilder)
+}
+
+inline fun Logger.debug(ch: Channel, crossinline messageBuilder: () -> String) {
+    log(Level.DEBUG, ch, messageBuilder)
+}
+
+inline fun Logger.info(ch: Channel, crossinline messageBuilder: () -> String) {
+    log(Level.INFO, ch, messageBuilder)
+}
+
+inline fun Logger.warn(ch: Channel, crossinline messageBuilder: () -> String) {
+    log(Level.WARN, ch, messageBuilder)
+}
+
+inline fun Logger.error(ch: Channel, crossinline messageBuilder: () -> String) {
+    log(Level.ERROR, ch, messageBuilder)
+}
+
+inline fun Logger.trace(ctx: ChannelHandlerContext, crossinline messageBuilder: () -> String) {
+    log(Level.TRACE, ctx.channel(), messageBuilder)
+}
+
+inline fun Logger.debug(ctx: ChannelHandlerContext, crossinline messageBuilder: () -> String) {
+    log(Level.DEBUG, ctx.channel(), messageBuilder)
+}
+
+inline fun Logger.info(ctx: ChannelHandlerContext, crossinline messageBuilder: () -> String) {
+    log(Level.INFO, ctx.channel(), messageBuilder)
+}
+
+inline fun Logger.warn(ctx: ChannelHandlerContext, crossinline messageBuilder: () -> String) {
+    log(Level.WARN, ctx.channel(), messageBuilder)
+}
+
+inline fun Logger.error(ctx: ChannelHandlerContext, crossinline messageBuilder: () -> String) {
+    log(Level.ERROR, ctx.channel(), messageBuilder)
+}
+
+
+inline fun Logger.log(level: Level, messageBuilder: () -> String) {
+    if (isEnabledForLevel(level)) {
         makeLoggingEventBuilder(level).log(messageBuilder())
     }
 }
 
-inline fun Logger.trace(messageBuilder : () -> String) {
+inline fun Logger.trace(messageBuilder: () -> String) {
-    if(isTraceEnabled) {
+    if (isTraceEnabled) {
         trace(messageBuilder())
     }
 }
 
-inline fun Logger.debug(messageBuilder : () -> String) {
+inline fun Logger.debug(messageBuilder: () -> String) {
-    if(isDebugEnabled) {
+    if (isDebugEnabled) {
         debug(messageBuilder())
     }
 }
 
-inline fun Logger.info(messageBuilder : () -> String) {
+inline fun Logger.info(messageBuilder: () -> String) {
-    if(isInfoEnabled) {
+    if (isInfoEnabled) {
         info(messageBuilder())
     }
 }
 
-inline fun Logger.warn(messageBuilder : () -> String) {
+inline fun Logger.warn(messageBuilder: () -> String) {
-    if(isWarnEnabled) {
+    if (isWarnEnabled) {
         warn(messageBuilder())
     }
 }
 
-inline fun Logger.error(messageBuilder : () -> String) {
+inline fun Logger.error(messageBuilder: () -> String) {
-    if(isErrorEnabled) {
+    if (isErrorEnabled) {
         error(messageBuilder())
     }
 }
@@ -94,9 +177,9 @@ class LoggingConfig {
 
     init {
         val logManager = LogManager.getLogManager()
-        System.getProperty("log.config.source")?.let withSource@ { source ->
+        System.getProperty("log.config.source")?.let withSource@{ source ->
             val urls = LoggingConfig::class.java.classLoader.getResources(source)
-            while(urls.hasMoreElements()) {
+            while (urls.hasMoreElements()) {
                 val url = urls.nextElement()
                 url.openStream().use { inputStream ->
                     logManager.readConfiguration(inputStream)

rbcs-common/src/main/kotlin/net/woggioni/rbcs/common/RBCS.kt

@@ -12,6 +12,24 @@ object RBCS {
     const val RBCS_PREFIX: String = "rbcs"
     const val XML_SCHEMA_NAMESPACE_URI = "http://www.w3.org/2001/XMLSchema-instance"
 
+    fun ByteArray.toInt(index : Int = 0) : Long {
+        if(index + 4 > size) throw IllegalArgumentException("Not enough bytes to decode a 32 bits integer")
+        var value : Long = 0
+        for (b in index until index + 4) {
+            value = (value shl 8) + (get(b).toInt() and 0xFF)
+        }
+        return value
+    }
+
+    fun ByteArray.toLong(index : Int = 0) : Long {
+        if(index + 8 > size) throw IllegalArgumentException("Not enough bytes to decode a 64 bits long integer")
+        var value : Long = 0
+        for (b in index until index + 8) {
+            value = (value shl 8) + (get(b).toInt() and 0xFF)
+        }
+        return value
+    }
+
     fun digest(
         data: ByteArray,
         md: MessageDigest = MessageDigest.getInstance("MD5")
@@ -26,4 +44,18 @@ object RBCS {
     ): String {
         return JWO.bytesToHex(digest(data, md))
     }
+
+    fun processCacheKey(key: String, digestAlgorithm: String?) = digestAlgorithm
+        ?.let(MessageDigest::getInstance)
+        ?.let { md ->
+            digest(key.toByteArray(), md)
+        } ?: key.toByteArray(Charsets.UTF_8)
+
+    fun Long.toIntOrNull(): Int? {
+        return if (this >= Int.MIN_VALUE && this <= Int.MAX_VALUE) {
+            toInt()
+        } else {
+            null
+        }
+    }
 }

rbcs-common/src/main/kotlin/net/woggioni/rbcs/common/Xml.kt

@@ -1,7 +1,6 @@
 package net.woggioni.rbcs.common
 
 import net.woggioni.jwo.JWO
-import org.slf4j.LoggerFactory
 import org.slf4j.event.Level
 import org.w3c.dom.Document
 import org.w3c.dom.Element
@@ -79,7 +78,7 @@ class Xml(val doc: Document, val element: Element) {
     class ErrorHandler(private val fileURL: URL) : ErrHandler {
 
         companion object {
-            private val log = LoggerFactory.getLogger(ErrorHandler::class.java)
+            private val log = createLogger<ErrorHandler>()
         }
 
          override fun warning(ex: SAXParseException)= err(ex, Level.WARN)

rbcs-server-memcache/build.gradle

@@ -34,6 +34,7 @@ dependencies {
     implementation catalog.jwo
     implementation catalog.slf4j.api
     implementation catalog.netty.common
+    implementation catalog.netty.handler
     implementation catalog.netty.codec.memcache
 
     bundle catalog.netty.codec.memcache

rbcs-server-memcache/src/main/java/module-info.java

@@ -11,6 +11,7 @@ module net.woggioni.rbcs.server.memcache {
     requires io.netty.codec.memcache;
     requires io.netty.common;
     requires io.netty.buffer;
+    requires io.netty.handler;
     requires org.slf4j;
 
     provides CacheProvider with net.woggioni.rbcs.server.memcache.MemcacheCacheProvider;

rbcs-server-memcache/src/main/kotlin/net/woggioni/rbcs/server/memcache/MemcacheCache.kt

@@ -1,23 +0,0 @@
-package net.woggioni.rbcs.server.memcache
-
-import io.netty.buffer.ByteBuf
-import net.woggioni.rbcs.api.Cache
-import net.woggioni.rbcs.server.memcache.client.MemcacheClient
-import java.nio.channels.ReadableByteChannel
-import java.util.concurrent.CompletableFuture
-
-class MemcacheCache(private val cfg : MemcacheCacheConfiguration) : Cache {
-    private val memcacheClient = MemcacheClient(cfg)
-
-    override fun get(key: String): CompletableFuture<ReadableByteChannel?> {
-        return memcacheClient.get(key)
-    }
-
-    override fun put(key: String, content: ByteBuf): CompletableFuture<Void> {
-        return memcacheClient.put(key, content, cfg.maxAge)
-    }
-
-    override fun close() {
-        memcacheClient.close()
-    }
-}

rbcs-server-memcache/src/main/kotlin/net/woggioni/rbcs/server/memcache/MemcacheCacheConfiguration.kt

@@ -1,23 +1,21 @@
 package net.woggioni.rbcs.server.memcache
 
+import net.woggioni.rbcs.api.CacheHandlerFactory
 import net.woggioni.rbcs.api.Configuration
 import net.woggioni.rbcs.common.HostAndPort
+import net.woggioni.rbcs.server.memcache.client.MemcacheClient
 import java.time.Duration
 
 data class MemcacheCacheConfiguration(
     val servers: List<Server>,
     val maxAge: Duration = Duration.ofDays(1),
-    val maxSize: Int = 0x100000,
     val digestAlgorithm: String? = null,
     val compressionMode: CompressionMode? = null,
+    val compressionLevel: Int,
+    val chunkSize : Int
 ) : Configuration.Cache {
 
     enum class CompressionMode {
-        /**
-         * Gzip mode
-         */
-        GZIP,
-
         /**
          * Deflate mode
          */
@@ -31,7 +29,14 @@ data class MemcacheCacheConfiguration(
     )
 
 
-    override fun materialize() = MemcacheCache(this)
+    override fun materialize() = object : CacheHandlerFactory {
+        private val client = MemcacheClient(this@MemcacheCacheConfiguration.servers, chunkSize)
+        override fun close() {
+            client.close()
+        }
+
+        override fun newHandler() = MemcacheCacheHandler(client, digestAlgorithm, compressionMode != null, compressionLevel, chunkSize, maxAge)
+    }
 
     override fun getNamespaceURI() = "urn:net.woggioni.rbcs.server.memcache"
 

rbcs-server-memcache/src/main/kotlin/net/woggioni/rbcs/server/memcache/MemcacheCacheHandler.kt

@@ -0,0 +1,409 @@
+package net.woggioni.rbcs.server.memcache
+
+import io.netty.buffer.ByteBuf
+import io.netty.buffer.ByteBufAllocator
+import io.netty.buffer.CompositeByteBuf
+import io.netty.channel.ChannelHandlerContext
+import io.netty.channel.SimpleChannelInboundHandler
+import io.netty.handler.codec.memcache.DefaultLastMemcacheContent
+import io.netty.handler.codec.memcache.DefaultMemcacheContent
+import io.netty.handler.codec.memcache.LastMemcacheContent
+import io.netty.handler.codec.memcache.MemcacheContent
+import io.netty.handler.codec.memcache.binary.BinaryMemcacheOpcodes
+import io.netty.handler.codec.memcache.binary.BinaryMemcacheResponse
+import io.netty.handler.codec.memcache.binary.BinaryMemcacheResponseStatus
+import io.netty.handler.codec.memcache.binary.DefaultBinaryMemcacheRequest
+import net.woggioni.rbcs.api.CacheValueMetadata
+import net.woggioni.rbcs.api.exception.ContentTooLargeException
+import net.woggioni.rbcs.api.message.CacheMessage
+import net.woggioni.rbcs.api.message.CacheMessage.CacheContent
+import net.woggioni.rbcs.api.message.CacheMessage.CacheGetRequest
+import net.woggioni.rbcs.api.message.CacheMessage.CachePutRequest
+import net.woggioni.rbcs.api.message.CacheMessage.CachePutResponse
+import net.woggioni.rbcs.api.message.CacheMessage.CacheValueFoundResponse
+import net.woggioni.rbcs.api.message.CacheMessage.CacheValueNotFoundResponse
+import net.woggioni.rbcs.api.message.CacheMessage.LastCacheContent
+import net.woggioni.rbcs.common.ByteBufInputStream
+import net.woggioni.rbcs.common.ByteBufOutputStream
+import net.woggioni.rbcs.common.RBCS.processCacheKey
+import net.woggioni.rbcs.common.RBCS.toIntOrNull
+import net.woggioni.rbcs.common.createLogger
+import net.woggioni.rbcs.common.debug
+import net.woggioni.rbcs.common.extractChunk
+import net.woggioni.rbcs.common.trace
+import net.woggioni.rbcs.server.memcache.client.MemcacheClient
+import net.woggioni.rbcs.server.memcache.client.MemcacheRequestController
+import net.woggioni.rbcs.server.memcache.client.MemcacheResponseHandler
+import java.io.ByteArrayOutputStream
+import java.io.ObjectInputStream
+import java.io.ObjectOutputStream
+import java.nio.ByteBuffer
+import java.nio.channels.Channels
+import java.nio.channels.FileChannel
+import java.nio.channels.ReadableByteChannel
+import java.nio.file.Files
+import java.nio.file.StandardOpenOption
+import java.time.Duration
+import java.time.Instant
+import java.util.concurrent.CompletableFuture
+import java.util.zip.Deflater
+import java.util.zip.DeflaterOutputStream
+import java.util.zip.InflaterOutputStream
+import io.netty.channel.Channel as NettyChannel
+
+class MemcacheCacheHandler(
+    private val client: MemcacheClient,
+    private val digestAlgorithm: String?,
+    private val compressionEnabled: Boolean,
+    private val compressionLevel: Int,
+    private val chunkSize: Int,
+    private val maxAge: Duration
+) : SimpleChannelInboundHandler<CacheMessage>() {
+    companion object {
+        private val log = createLogger<MemcacheCacheHandler>()
+
+        private fun encodeExpiry(expiry: Duration): Int {
+            val expirySeconds = expiry.toSeconds()
+            return expirySeconds.toInt().takeIf { it.toLong() == expirySeconds }
+                ?: Instant.ofEpochSecond(expirySeconds).epochSecond.toInt()
+        }
+    }
+
+    private inner class InProgressGetRequest(
+        private val key: String,
+        private val ctx: ChannelHandlerContext
+    ) {
+        private val acc = ctx.alloc().compositeBuffer()
+        private val chunk = ctx.alloc().compositeBuffer()
+        private val outputStream = ByteBufOutputStream(chunk).let {
+            if (compressionEnabled) {
+                InflaterOutputStream(it)
+            } else {
+                it
+            }
+        }
+        private var responseSent = false
+        private var metadataSize: Int? = null
+
+        fun write(buf: ByteBuf) {
+            acc.addComponent(true, buf.retain())
+            if (metadataSize == null && acc.readableBytes() >= Int.SIZE_BYTES) {
+                metadataSize = acc.readInt()
+            }
+            metadataSize
+                ?.takeIf { !responseSent }
+                ?.takeIf { acc.readableBytes() >= it }
+                ?.let { mSize ->
+                    val metadata = ObjectInputStream(ByteBufInputStream(acc)).use {
+                        acc.retain()
+                        it.readObject() as CacheValueMetadata
+                    }
+                    ctx.writeAndFlush(CacheValueFoundResponse(key, metadata))
+                    responseSent = true
+                    acc.readerIndex(Int.SIZE_BYTES + mSize)
+                }
+            if (responseSent) {
+                acc.readBytes(outputStream, acc.readableBytes())
+                if(acc.readableBytes() >= chunkSize) {
+                    flush(false)
+                }
+            }
+        }
+
+        private fun flush(last : Boolean) {
+            val toSend = extractChunk(chunk, ctx.alloc())
+            val msg = if(last) {
+                log.trace(ctx) {
+                    "Sending last chunk to client on channel ${ctx.channel().id().asShortText()}"
+                }
+                LastCacheContent(toSend)
+            } else {
+                log.trace(ctx) {
+                    "Sending chunk to client on channel ${ctx.channel().id().asShortText()}"
+                }
+                CacheContent(toSend)
+            }
+            ctx.writeAndFlush(msg)
+        }
+
+        fun commit() {
+            acc.release()
+            chunk.retain()
+            outputStream.close()
+            flush(true)
+            chunk.release()
+        }
+
+        fun rollback() {
+            acc.release()
+            outputStream.close()
+        }
+    }
+
+    private inner class InProgressPutRequest(
+        private val ch : NettyChannel,
+        metadata : CacheValueMetadata,
+        val digest : ByteBuf,
+        val requestController: CompletableFuture<MemcacheRequestController>,
+        private val alloc: ByteBufAllocator
+    ) {
+        private var totalSize = 0
+        private var tmpFile : FileChannel? = null
+        private val accumulator = alloc.compositeBuffer()
+        private val stream = ByteBufOutputStream(accumulator).let {
+            if (compressionEnabled) {
+                DeflaterOutputStream(it, Deflater(compressionLevel))
+            } else {
+                it
+            }
+        }
+
+        init {
+            ByteArrayOutputStream().let { baos ->
+                ObjectOutputStream(baos).use {
+                    it.writeObject(metadata)
+                }
+                val serializedBytes = baos.toByteArray()
+                accumulator.writeInt(serializedBytes.size)
+                accumulator.writeBytes(serializedBytes)
+            }
+        }
+
+        fun write(buf: ByteBuf) {
+            totalSize += buf.readableBytes()
+            buf.readBytes(stream, buf.readableBytes())
+            tmpFile?.let {
+                flushToDisk(it, accumulator)
+            }
+            if(accumulator.readableBytes() > 0x100000) {
+                log.debug(ch) {
+                    "Entry is too big, buffering it into a file"
+                }
+                val opts = arrayOf(
+                    StandardOpenOption.DELETE_ON_CLOSE,
+                    StandardOpenOption.READ,
+                    StandardOpenOption.WRITE,
+                    StandardOpenOption.TRUNCATE_EXISTING
+                )
+                FileChannel.open(Files.createTempFile("rbcs-memcache", ".tmp"), *opts).let { fc ->
+                    tmpFile = fc
+                    flushToDisk(fc, accumulator)
+                }
+            }
+        }
+
+        private fun flushToDisk(fc : FileChannel, buf : CompositeByteBuf) {
+            val chunk = extractChunk(buf, alloc)
+            fc.write(chunk.nioBuffer())
+            chunk.release()
+        }
+
+        fun commit() : Pair<Int, ReadableByteChannel> {
+            digest.release()
+            accumulator.retain()
+            stream.close()
+            val fileChannel = tmpFile
+            return if(fileChannel != null) {
+                flushToDisk(fileChannel, accumulator)
+                accumulator.release()
+                fileChannel.position(0)
+                val fileSize = fileChannel.size().toIntOrNull() ?: let {
+                    fileChannel.close()
+                    throw ContentTooLargeException("Request body is too large", null)
+                }
+                fileSize to fileChannel
+            } else {
+                accumulator.readableBytes() to Channels.newChannel(ByteBufInputStream(accumulator))
+            }
+        }
+
+        fun rollback() {
+            stream.close()
+            digest.release()
+            tmpFile?.close()
+        }
+    }
+
+    private var inProgressPutRequest: InProgressPutRequest? = null
+    private var inProgressGetRequest: InProgressGetRequest? = null
+
+    override fun channelRead0(ctx: ChannelHandlerContext, msg: CacheMessage) {
+        when (msg) {
+            is CacheGetRequest -> handleGetRequest(ctx, msg)
+            is CachePutRequest -> handlePutRequest(ctx, msg)
+            is LastCacheContent -> handleLastCacheContent(ctx, msg)
+            is CacheContent -> handleCacheContent(ctx, msg)
+            else -> ctx.fireChannelRead(msg)
+        }
+    }
+
+    private fun handleGetRequest(ctx: ChannelHandlerContext, msg: CacheGetRequest) {
+        log.debug(ctx) {
+            "Fetching ${msg.key} from memcache"
+        }
+        val key = ctx.alloc().buffer().also {
+            it.writeBytes(processCacheKey(msg.key, digestAlgorithm))
+        }
+        val responseHandler = object : MemcacheResponseHandler {
+            override fun responseReceived(response: BinaryMemcacheResponse) {
+                val status = response.status()
+                when (status) {
+                    BinaryMemcacheResponseStatus.SUCCESS -> {
+                        log.debug(ctx) {
+                            "Cache hit for key ${msg.key} on memcache"
+                        }
+                        inProgressGetRequest = InProgressGetRequest(msg.key, ctx)
+                    }
+
+                    BinaryMemcacheResponseStatus.KEY_ENOENT -> {
+                        log.debug(ctx) {
+                            "Cache miss for key ${msg.key} on memcache"
+                        }
+                        ctx.writeAndFlush(CacheValueNotFoundResponse())
+                    }
+                }
+            }
+
+            override fun contentReceived(content: MemcacheContent) {
+                log.trace(ctx) {
+                    "${if(content is LastMemcacheContent) "Last chunk" else "Chunk"} of ${content.content().readableBytes()} bytes received from memcache for key ${msg.key}"
+                }
+                inProgressGetRequest?.write(content.content())
+                if (content is LastMemcacheContent) {
+                    inProgressGetRequest?.commit()
+                }
+            }
+
+            override fun exceptionCaught(ex: Throwable) {
+                inProgressGetRequest?.let {
+                    inProgressGetRequest = null
+                    it.rollback()
+                }
+                this@MemcacheCacheHandler.exceptionCaught(ctx, ex)
+            }
+        }
+        client.sendRequest(key.retainedDuplicate(), responseHandler).thenAccept { requestHandle ->
+            log.trace(ctx) {
+                "Sending GET request for key ${msg.key} to memcache"
+            }
+            val request = DefaultBinaryMemcacheRequest(key).apply {
+                setOpcode(BinaryMemcacheOpcodes.GET)
+            }
+            requestHandle.sendRequest(request)
+        }
+    }
+
+    private fun handlePutRequest(ctx: ChannelHandlerContext, msg: CachePutRequest) {
+        val key = ctx.alloc().buffer().also {
+            it.writeBytes(processCacheKey(msg.key, digestAlgorithm))
+        }
+        val responseHandler = object : MemcacheResponseHandler {
+            override fun responseReceived(response: BinaryMemcacheResponse) {
+                val status = response.status()
+                when (status) {
+                    BinaryMemcacheResponseStatus.SUCCESS -> {
+                        log.debug(ctx) {
+                            "Inserted key ${msg.key} into memcache"
+                        }
+                        ctx.writeAndFlush(CachePutResponse(msg.key))
+                    }
+                    else -> this@MemcacheCacheHandler.exceptionCaught(ctx, MemcacheException(status))
+                }
+            }
+
+            override fun contentReceived(content: MemcacheContent) {}
+
+            override fun exceptionCaught(ex: Throwable) {
+                this@MemcacheCacheHandler.exceptionCaught(ctx, ex)
+            }
+        }
+
+        val requestController = client.sendRequest(key.retainedDuplicate(), responseHandler).whenComplete { _, ex ->
+            ex?.let {
+                this@MemcacheCacheHandler.exceptionCaught(ctx, ex)
+            }
+        }
+        inProgressPutRequest = InProgressPutRequest(ctx.channel(), msg.metadata, key, requestController, ctx.alloc())
+    }
+
+    private fun handleCacheContent(ctx: ChannelHandlerContext, msg: CacheContent) {
+        inProgressPutRequest?.let { request ->
+            log.trace(ctx) {
+                "Received chunk of ${msg.content().readableBytes()} bytes for memcache"
+            }
+            request.write(msg.content())
+        }
+    }
+
+    private fun handleLastCacheContent(ctx: ChannelHandlerContext, msg: LastCacheContent) {
+        inProgressPutRequest?.let { request ->
+            inProgressPutRequest = null
+            log.trace(ctx) {
+                "Received last chunk of ${msg.content().readableBytes()} bytes for memcache"
+            }
+            request.write(msg.content())
+            val key = request.digest.retainedDuplicate()
+            val (payloadSize, payloadSource) = request.commit()
+            val extras = ctx.alloc().buffer(8, 8)
+            extras.writeInt(0)
+            extras.writeInt(encodeExpiry(maxAge))
+            val totalBodyLength = request.digest.readableBytes() + extras.readableBytes() + payloadSize
+            request.requestController.whenComplete { requestController, ex ->
+                if(ex == null) {
+                    log.trace(ctx) {
+                        "Sending SET request to memcache"
+                    }
+                    requestController.sendRequest(DefaultBinaryMemcacheRequest().apply {
+                        setOpcode(BinaryMemcacheOpcodes.SET)
+                        setKey(key)
+                        setExtras(extras)
+                        setTotalBodyLength(totalBodyLength)
+                    })
+                    log.trace(ctx) {
+                        "Sending request payload to memcache"
+                    }
+                    payloadSource.use { source ->
+                        val bb = ByteBuffer.allocate(chunkSize)
+                        while (true) {
+                            val read = source.read(bb)
+                            bb.limit()
+                            if(read >= 0 && bb.position() < chunkSize && bb.hasRemaining()) {
+                                continue
+                            }
+                            val chunk = ctx.alloc().buffer(chunkSize)
+                            bb.flip()
+                            chunk.writeBytes(bb)
+                            bb.clear()
+                            log.trace(ctx) {
+                                "Sending ${chunk.readableBytes()} bytes chunk to memcache"
+                            }
+                            if(read < 0) {
+                                requestController.sendContent(DefaultLastMemcacheContent(chunk))
+                                break
+                            } else {
+                                requestController.sendContent(DefaultMemcacheContent(chunk))
+                            }
+                        }
+                    }
+                } else {
+                    payloadSource.close()
+                }
+            }
+        }
+    }
+
+    override fun exceptionCaught(ctx: ChannelHandlerContext, cause: Throwable) {
+        inProgressGetRequest?.let {
+            inProgressGetRequest = null
+            it.rollback()
+        }
+        inProgressPutRequest?.let {
+            inProgressPutRequest = null
+            it.requestController.thenAccept { controller ->
+                controller.exceptionCaught(cause)
+            }
+            it.rollback()
+        }
+        super.exceptionCaught(ctx, cause)
+    }
+}

rbcs-server-memcache/src/main/kotlin/net/woggioni/rbcs/server/memcache/MemcacheCacheProvider.kt

@@ -2,8 +2,8 @@ package net.woggioni.rbcs.server.memcache
 
 import net.woggioni.rbcs.api.CacheProvider
 import net.woggioni.rbcs.api.exception.ConfigurationException
-import net.woggioni.rbcs.common.RBCS
 import net.woggioni.rbcs.common.HostAndPort
+import net.woggioni.rbcs.common.RBCS
 import net.woggioni.rbcs.common.Xml
 import net.woggioni.rbcs.common.Xml.Companion.asIterable
 import net.woggioni.rbcs.common.Xml.Companion.renderAttribute
@@ -28,18 +28,19 @@ class MemcacheCacheProvider : CacheProvider<MemcacheCacheConfiguration> {
         val maxAge = el.renderAttribute("max-age")
             ?.let(Duration::parse)
             ?: Duration.ofDays(1)
-        val maxSize = el.renderAttribute("max-size")
+        val chunkSize = el.renderAttribute("chunk-size")
-            ?.let(String::toInt)
+            ?.let(Integer::decode)
-            ?: 0x100000
+            ?: 0x10000
+        val compressionLevel = el.renderAttribute("compression-level")
+            ?.let(Integer::decode)
+            ?: -1
         val compressionMode = el.renderAttribute("compression-mode")
             ?.let {
                 when (it) {
-                    "gzip" -> MemcacheCacheConfiguration.CompressionMode.GZIP
                     "deflate" -> MemcacheCacheConfiguration.CompressionMode.DEFLATE
                     else -> MemcacheCacheConfiguration.CompressionMode.DEFLATE
                 }
             }
-            ?: MemcacheCacheConfiguration.CompressionMode.DEFLATE
         val digestAlgorithm = el.renderAttribute("digest")
         for (child in el.asIterable()) {
             when (child.nodeName) {
@@ -60,9 +61,10 @@ class MemcacheCacheProvider : CacheProvider<MemcacheCacheConfiguration> {
         return MemcacheCacheConfiguration(
             servers,
             maxAge,
-            maxSize,
             digestAlgorithm,
             compressionMode,
+            compressionLevel,
+            chunkSize
         )
     }
 
@@ -70,7 +72,6 @@ class MemcacheCacheProvider : CacheProvider<MemcacheCacheConfiguration> {
         val result = doc.createElement("cache")
         Xml.of(doc, result) {
             attr("xmlns:${xmlNamespacePrefix}", xmlNamespace, namespaceURI = "http://www.w3.org/2000/xmlns/")
-
             attr("xs:type", "${xmlNamespacePrefix}:$xmlType", RBCS.XML_SCHEMA_NAMESPACE_URI)
             for (server in servers) {
                 node("server") {
@@ -83,18 +84,18 @@ class MemcacheCacheProvider : CacheProvider<MemcacheCacheConfiguration> {
                 }
             }
             attr("max-age", maxAge.toString())
-            attr("max-size", maxSize.toString())
+            attr("chunk-size", chunkSize.toString())
             digestAlgorithm?.let { digestAlgorithm ->
                 attr("digest", digestAlgorithm)
             }
             compressionMode?.let { compressionMode ->
                 attr(
                     "compression-mode", when (compressionMode) {
-                        MemcacheCacheConfiguration.CompressionMode.GZIP -> "gzip"
                         MemcacheCacheConfiguration.CompressionMode.DEFLATE -> "deflate"
                     }
                 )
             }
+            attr("compression-level", compressionLevel.toString())
         }
         result
     }

rbcs-server-memcache/src/main/kotlin/net/woggioni/rbcs/server/memcache/client/MemcacheClient.kt

@@ -3,8 +3,8 @@ package net.woggioni.rbcs.server.memcache.client
 
 import io.netty.bootstrap.Bootstrap
 import io.netty.buffer.ByteBuf
-import io.netty.buffer.Unpooled
 import io.netty.channel.Channel
+import io.netty.channel.ChannelFutureListener
 import io.netty.channel.ChannelHandlerContext
 import io.netty.channel.ChannelOption
 import io.netty.channel.ChannelPipeline
@@ -14,44 +14,29 @@ import io.netty.channel.pool.AbstractChannelPoolHandler
 import io.netty.channel.pool.ChannelPool
 import io.netty.channel.pool.FixedChannelPool
 import io.netty.channel.socket.nio.NioSocketChannel
-import io.netty.handler.codec.DecoderException
+import io.netty.handler.codec.memcache.LastMemcacheContent
+import io.netty.handler.codec.memcache.MemcacheContent
+import io.netty.handler.codec.memcache.MemcacheObject
 import io.netty.handler.codec.memcache.binary.BinaryMemcacheClientCodec
-import io.netty.handler.codec.memcache.binary.BinaryMemcacheObjectAggregator
+import io.netty.handler.codec.memcache.binary.BinaryMemcacheRequest
-import io.netty.handler.codec.memcache.binary.BinaryMemcacheOpcodes
+import io.netty.handler.codec.memcache.binary.BinaryMemcacheResponse
-import io.netty.handler.codec.memcache.binary.BinaryMemcacheResponseStatus
-import io.netty.handler.codec.memcache.binary.DefaultFullBinaryMemcacheRequest
-import io.netty.handler.codec.memcache.binary.FullBinaryMemcacheRequest
-import io.netty.handler.codec.memcache.binary.FullBinaryMemcacheResponse
 import io.netty.util.concurrent.GenericFutureListener
-import net.woggioni.rbcs.common.ByteBufInputStream
-import net.woggioni.rbcs.common.ByteBufOutputStream
-import net.woggioni.rbcs.common.RBCS.digest
 import net.woggioni.rbcs.common.HostAndPort
-import net.woggioni.rbcs.common.contextLogger
+import net.woggioni.rbcs.common.createLogger
+import net.woggioni.rbcs.common.warn
 import net.woggioni.rbcs.server.memcache.MemcacheCacheConfiguration
-import net.woggioni.rbcs.server.memcache.MemcacheException
+import net.woggioni.rbcs.server.memcache.MemcacheCacheHandler
-import net.woggioni.jwo.JWO
+import java.io.IOException
 import java.net.InetSocketAddress
-import java.nio.channels.Channels
-import java.nio.channels.ReadableByteChannel
-import java.security.MessageDigest
-import java.time.Duration
-import java.time.Instant
 import java.util.concurrent.CompletableFuture
 import java.util.concurrent.ConcurrentHashMap
-import java.util.zip.Deflater
-import java.util.zip.DeflaterOutputStream
-import java.util.zip.GZIPInputStream
-import java.util.zip.GZIPOutputStream
-import java.util.zip.InflaterInputStream
 import io.netty.util.concurrent.Future as NettyFuture
 
 
-class MemcacheClient(private val cfg: MemcacheCacheConfiguration) : AutoCloseable {
+class MemcacheClient(private val servers: List<MemcacheCacheConfiguration.Server>, private val chunkSize : Int) : AutoCloseable {
 
     private companion object {
-        @JvmStatic
+        private val log = createLogger<MemcacheCacheHandler>()
-        private val log = contextLogger()
     }
 
     private val group: NioEventLoopGroup
@@ -75,35 +60,33 @@ class MemcacheClient(private val cfg: MemcacheCacheConfiguration) : AutoCloseabl
 
             override fun channelCreated(ch: Channel) {
                 val pipeline: ChannelPipeline = ch.pipeline()
-                pipeline.addLast(BinaryMemcacheClientCodec())
+                pipeline.addLast(BinaryMemcacheClientCodec(chunkSize, true))
-                pipeline.addLast(BinaryMemcacheObjectAggregator(Integer.MAX_VALUE))
             }
         }
         return FixedChannelPool(bootstrap, channelPoolHandler, server.maxConnections)
     }
 
-
+    fun sendRequest(
-    private fun sendRequest(request: FullBinaryMemcacheRequest): CompletableFuture<FullBinaryMemcacheResponse> {
+        key: ByteBuf,
-
+        responseHandler: MemcacheResponseHandler
-        val server = cfg.servers.let { servers ->
+    ): CompletableFuture<MemcacheRequestController> {
-            if (servers.size > 1) {
+        val server = if (servers.size > 1) {
-                val key = request.key().duplicate()
+            var checksum = 0
-                var checksum = 0
+            while (key.readableBytes() > 4) {
-                while (key.readableBytes() > 4) {
+                val byte = key.readInt()
-                    val byte = key.readInt()
+                checksum = checksum xor byte
-                    checksum = checksum xor byte
-                }
-                while (key.readableBytes() > 0) {
-                    val byte = key.readByte()
-                    checksum = checksum xor byte.toInt()
-                }
-                servers[checksum % servers.size]
-            } else {
-                servers.first()
             }
+            while (key.readableBytes() > 0) {
+                val byte = key.readByte()
+                checksum = checksum xor byte.toInt()
+            }
+            servers[checksum % servers.size]
+        } else {
+            servers.first()
         }
+        key.release()
 
-        val response = CompletableFuture<FullBinaryMemcacheResponse>()
+        val response = CompletableFuture<MemcacheRequestController>()
         // Custom handler for processing responses
         val pool = connectionPool.computeIfAbsent(server.endpoint) {
             newConnectionPool(server)
@@ -111,33 +94,108 @@ class MemcacheClient(private val cfg: MemcacheCacheConfiguration) : AutoCloseabl
         pool.acquire().addListener(object : GenericFutureListener<NettyFuture<Channel>> {
             override fun operationComplete(channelFuture: NettyFuture<Channel>) {
                 if (channelFuture.isSuccess) {
-                    val channel = channelFuture.now
-                    val pipeline = channel.pipeline()
-                    channel.pipeline()
-                        .addLast("client-handler", object : SimpleChannelInboundHandler<FullBinaryMemcacheResponse>() {
-                            override fun channelRead0(
-                                ctx: ChannelHandlerContext,
-                                msg: FullBinaryMemcacheResponse
-                            ) {
-                                pipeline.removeLast()
-                                pool.release(channel)
-                                msg.touch("The method's caller must remember to release this")
-                                response.complete(msg.retain())
-                            }
 
-                            override fun exceptionCaught(ctx: ChannelHandlerContext, cause: Throwable) {
+                    var requestSent = false
-                                val ex = when (cause) {
+                    var requestBodySent = false
-                                    is DecoderException -> cause.cause!!
+                    var requestFinished = false
-                                    else -> cause
+                    var responseReceived = false
-                                }
+                    var responseBodyReceived = false
-                                ctx.close()
+                    var responseFinished = false
-                                pipeline.removeLast()
+                    var requestBodySize = 0
-                                pool.release(channel)
+                    var requestBodyBytesSent = 0
-                                response.completeExceptionally(ex)
+
+
+
+                    val channel = channelFuture.now
+                    var connectionClosedByTheRemoteServer = true
+                    val closeCallback = {
+                        if (connectionClosedByTheRemoteServer) {
+                            val ex = IOException("The memcache server closed the connection")
+                            val completed = response.completeExceptionally(ex)
+                            if(!completed) responseHandler.exceptionCaught(ex)
+                            log.warn {
+                                "RequestSent: $requestSent, RequestBodySent: $requestBodySent, " +
+                                "RequestFinished: $requestFinished, ResponseReceived: $responseReceived, " +
+                                "ResponseBodyReceived: $responseBodyReceived, ResponseFinished: $responseFinished, " +
+                                "RequestBodySize: $requestBodySize, RequestBodyBytesSent: $requestBodyBytesSent"
                             }
-                        })
+                        }
-                    request.touch()
+                        pool.release(channel)
-                    channel.writeAndFlush(request)
+                    }
+                    val closeListener = ChannelFutureListener {
+                        closeCallback()
+                    }
+                    channel.closeFuture().addListener(closeListener)
+                    val pipeline = channel.pipeline()
+                    val handler = object : SimpleChannelInboundHandler<MemcacheObject>() {
+
+                        override fun handlerAdded(ctx: ChannelHandlerContext) {
+                            channel.closeFuture().removeListener(closeListener)
+                        }
+
+                        override fun channelRead0(
+                            ctx: ChannelHandlerContext,
+                            msg: MemcacheObject
+                        ) {
+                            when (msg) {
+                                is BinaryMemcacheResponse -> {
+                                    responseHandler.responseReceived(msg)
+                                    responseReceived = true
+                                }
+
+                                is LastMemcacheContent -> {
+                                    responseFinished = true
+                                    responseHandler.contentReceived(msg)
+                                    pipeline.remove(this)
+                                    pool.release(channel)
+                                }
+
+                                is MemcacheContent -> {
+                                    responseBodyReceived = true
+                                    responseHandler.contentReceived(msg)
+                                }
+                            }
+                        }
+
+                        override fun channelInactive(ctx: ChannelHandlerContext) {
+                            closeCallback()
+                            ctx.fireChannelInactive()
+                        }
+
+                        override fun exceptionCaught(ctx: ChannelHandlerContext, cause: Throwable) {
+                            connectionClosedByTheRemoteServer = false
+                            ctx.close()
+                            pool.release(channel)
+                            responseHandler.exceptionCaught(cause)
+                        }
+                    }
+
+                    channel.pipeline()
+                        .addLast("client-handler", handler)
+                    response.complete(object : MemcacheRequestController {
+
+                        override fun sendRequest(request: BinaryMemcacheRequest) {
+                            requestBodySize = request.totalBodyLength() - request.keyLength() - request.extrasLength()
+                            channel.writeAndFlush(request)
+                            requestSent = true
+                        }
+
+                        override fun sendContent(content: MemcacheContent) {
+                            val size = content.content().readableBytes()
+                            channel.writeAndFlush(content).addListener {
+                                requestBodyBytesSent += size
+                                requestBodySent = true
+                                if(content is LastMemcacheContent) {
+                                    requestFinished = true
+                                }
+                            }
+                        }
+
+                        override fun exceptionCaught(ex: Throwable) {
+                            connectionClosedByTheRemoteServer = false
+                            channel.close()
+                        }
+                    })
                 } else {
                     response.completeExceptionally(channelFuture.cause())
                 }
@@ -146,107 +204,6 @@ class MemcacheClient(private val cfg: MemcacheCacheConfiguration) : AutoCloseabl
         return response
     }
 
-    private fun encodeExpiry(expiry: Duration): Int {
-        val expirySeconds = expiry.toSeconds()
-        return expirySeconds.toInt().takeIf { it.toLong() == expirySeconds }
-            ?: Instant.ofEpochSecond(expirySeconds).epochSecond.toInt()
-    }
-
-    fun get(key: String): CompletableFuture<ReadableByteChannel?> {
-        val request = (cfg.digestAlgorithm
-            ?.let(MessageDigest::getInstance)
-            ?.let { md ->
-                digest(key.toByteArray(), md)
-            } ?: key.toByteArray(Charsets.UTF_8)).let { digest ->
-            DefaultFullBinaryMemcacheRequest(Unpooled.wrappedBuffer(digest), null).apply {
-                setOpcode(BinaryMemcacheOpcodes.GET)
-            }
-        }
-        return sendRequest(request).thenApply { response ->
-            try {
-                when (val status = response.status()) {
-                    BinaryMemcacheResponseStatus.SUCCESS -> {
-                        val compressionMode = cfg.compressionMode
-                        val content = response.content().retain()
-                        content.touch()
-                        if (compressionMode != null) {
-                            when (compressionMode) {
-                                MemcacheCacheConfiguration.CompressionMode.GZIP -> {
-                                    GZIPInputStream(ByteBufInputStream(content))
-                                }
-
-                                MemcacheCacheConfiguration.CompressionMode.DEFLATE -> {
-                                    InflaterInputStream(ByteBufInputStream(content))
-                                }
-                            }
-                        } else {
-                            ByteBufInputStream(content)
-                        }.let(Channels::newChannel)
-                    }
-
-                    BinaryMemcacheResponseStatus.KEY_ENOENT -> {
-                        null
-                    }
-
-                    else -> throw MemcacheException(status)
-                }
-            } finally {
-                response.release()
-            }
-        }
-    }
-
-    fun put(key: String, content: ByteBuf, expiry: Duration, cas: Long? = null): CompletableFuture<Void> {
-        val request = (cfg.digestAlgorithm
-            ?.let(MessageDigest::getInstance)
-            ?.let { md ->
-                digest(key.toByteArray(), md)
-            } ?: key.toByteArray(Charsets.UTF_8)).let { digest ->
-            val extras = Unpooled.buffer(8, 8)
-            extras.writeInt(0)
-            extras.writeInt(encodeExpiry(expiry))
-            val compressionMode = cfg.compressionMode
-            content.retain()
-            val payload = if (compressionMode != null) {
-                val inputStream = ByteBufInputStream(content)
-                val buf = content.alloc().buffer()
-                buf.retain()
-                val outputStream = when (compressionMode) {
-                    MemcacheCacheConfiguration.CompressionMode.GZIP -> {
-                        GZIPOutputStream(ByteBufOutputStream(buf))
-                    }
-
-                    MemcacheCacheConfiguration.CompressionMode.DEFLATE -> {
-                        DeflaterOutputStream(ByteBufOutputStream(buf), Deflater(Deflater.DEFAULT_COMPRESSION, false))
-                    }
-                }
-                inputStream.use { i ->
-                    outputStream.use { o ->
-                        JWO.copy(i, o)
-                    }
-                }
-                buf
-            } else {
-                content
-            }
-            DefaultFullBinaryMemcacheRequest(Unpooled.wrappedBuffer(digest), extras, payload).apply {
-                setOpcode(BinaryMemcacheOpcodes.SET)
-                cas?.let(this::setCas)
-            }
-        }
-        return sendRequest(request).thenApply { response ->
-            try {
-                when (val status = response.status()) {
-                    BinaryMemcacheResponseStatus.SUCCESS -> null
-                    else -> throw MemcacheException(status)
-                }
-            } finally {
-                response.release()
-            }
-        }
-    }
-
-
     fun shutDown(): NettyFuture<*> {
         return group.shutdownGracefully()
     }

rbcs-server-memcache/src/main/kotlin/net/woggioni/rbcs/server/memcache/client/MemcacheRequestController.kt

@@ -0,0 +1,13 @@
+package net.woggioni.rbcs.server.memcache.client
+
+import io.netty.handler.codec.memcache.MemcacheContent
+import io.netty.handler.codec.memcache.binary.BinaryMemcacheRequest
+
+interface MemcacheRequestController {
+
+    fun sendRequest(request : BinaryMemcacheRequest)
+
+    fun sendContent(content : MemcacheContent)
+
+    fun exceptionCaught(ex : Throwable)
+}

rbcs-server-memcache/src/main/kotlin/net/woggioni/rbcs/server/memcache/client/MemcacheResponseHandler.kt

@@ -0,0 +1,14 @@
+package net.woggioni.rbcs.server.memcache.client
+
+import io.netty.handler.codec.memcache.MemcacheContent
+import io.netty.handler.codec.memcache.binary.BinaryMemcacheResponse
+
+interface MemcacheResponseHandler {
+
+
+    fun responseReceived(response : BinaryMemcacheResponse)
+
+    fun contentReceived(content : MemcacheContent)
+
+    fun exceptionCaught(ex : Throwable)
+}

rbcs-server-memcache/src/main/resources/net/woggioni/rbcs/server/memcache/schema/rbcs-memcache.xsd

@@ -20,9 +20,10 @@
                     <xs:element name="server" type="rbcs-memcache:memcacheServerType"/>
                 </xs:sequence>
                 <xs:attribute name="max-age" type="xs:duration" default="P1D"/>
-                <xs:attribute name="max-size" type="xs:unsignedInt" default="1048576"/>
+                <xs:attribute name="chunk-size" type="rbcs:byteSizeType" default="0x10000"/>
                 <xs:attribute name="digest" type="xs:token" />
                 <xs:attribute name="compression-mode" type="rbcs-memcache:compressionType"/>
+                <xs:attribute name="compression-level" type="rbcs:compressionLevelType" default="-1"/>
             </xs:extension>
         </xs:complexContent>
     </xs:complexType>
@@ -30,7 +31,6 @@
     <xs:simpleType name="compressionType">
         <xs:restriction base="xs:token">
             <xs:enumeration value="deflate"/>
-            <xs:enumeration value="gzip"/>
         </xs:restriction>
     </xs:simpleType>
 

rbcs-server-memcache/src/test/kotlin/net/woggioni/rbcs/server/memcache/client/ByteBufferTest.kt

@@ -0,0 +1,27 @@
+package net.woggioni.rbcs.server.memcache.client
+
+import io.netty.buffer.ByteBufUtil
+import io.netty.buffer.Unpooled
+import org.junit.jupiter.api.Assertions
+import org.junit.jupiter.api.Test
+import java.io.ByteArrayInputStream
+import java.nio.ByteBuffer
+import java.nio.channels.Channels
+import kotlin.random.Random
+
+class ByteBufferTest {
+
+    @Test
+    fun test() {
+        val byteBuffer = ByteBuffer.allocate(0x100)
+        val originalBytes = Random(101325).nextBytes(0x100)
+        Channels.newChannel(ByteArrayInputStream(originalBytes)).use { source ->
+            source.read(byteBuffer)
+        }
+        byteBuffer.flip()
+        val buf = Unpooled.buffer()
+        buf.writeBytes(byteBuffer)
+        val finalBytes = ByteBufUtil.getBytes(buf)
+        Assertions.assertArrayEquals(originalBytes, finalBytes)
+    }
+}

rbcs-server/build.gradle

@@ -9,6 +9,9 @@ dependencies {
     implementation catalog.jwo
     implementation catalog.slf4j.api
     implementation catalog.netty.codec.http
+    implementation catalog.netty.handler
+    implementation catalog.netty.buffer
+    implementation catalog.netty.transport
 
     api project(':rbcs-common')
     api project(':rbcs-api')
@@ -36,3 +39,4 @@ publishing {
 }
 
 
+

rbcs-server/src/main/kotlin/net/woggioni/rbcs/server/Logging.kt

@@ -1,30 +0,0 @@
-package net.woggioni.rbcs.server
-
-import io.netty.channel.ChannelHandlerContext
-import org.slf4j.Logger
-import java.net.InetSocketAddress
-
-inline fun Logger.trace(ctx : ChannelHandlerContext, messageBuilder : () -> String) {
-    log(this, ctx, { isTraceEnabled }, { trace(it) } , messageBuilder)
-}
-inline fun Logger.debug(ctx : ChannelHandlerContext, messageBuilder : () -> String) {
-    log(this, ctx, { isDebugEnabled }, { debug(it) } , messageBuilder)
-}
-inline fun Logger.info(ctx : ChannelHandlerContext, messageBuilder : () -> String) {
-    log(this, ctx, { isInfoEnabled }, { info(it) } , messageBuilder)
-}
-inline fun Logger.warn(ctx : ChannelHandlerContext, messageBuilder : () -> String) {
-    log(this, ctx, { isWarnEnabled }, { warn(it) } , messageBuilder)
-}
-inline fun Logger.error(ctx : ChannelHandlerContext, messageBuilder : () -> String) {
-    log(this, ctx, { isErrorEnabled }, { error(it) } , messageBuilder)
-}
-
-inline fun log(log : Logger, ctx : ChannelHandlerContext,
-                        filter : Logger.() -> Boolean,
-                        loggerMethod : Logger.(String) -> Unit, messageBuilder : () -> String) {
-    if(log.filter()) {
-        val clientAddress = (ctx.channel().remoteAddress() as InetSocketAddress).address.hostAddress
-        log.loggerMethod(clientAddress + " - " + messageBuilder())
-    }
-}

rbcs-server/src/main/kotlin/net/woggioni/rbcs/server/RemoteBuildCacheServer.kt

@@ -16,7 +16,6 @@ import io.netty.handler.codec.compression.CompressionOptions
 import io.netty.handler.codec.http.DefaultHttpContent
 import io.netty.handler.codec.http.HttpContentCompressor
 import io.netty.handler.codec.http.HttpHeaderNames
-import io.netty.handler.codec.http.HttpObjectAggregator
 import io.netty.handler.codec.http.HttpRequest
 import io.netty.handler.codec.http.HttpServerCodec
 import io.netty.handler.ssl.ClientAuth
@@ -30,13 +29,15 @@ import io.netty.handler.timeout.IdleStateHandler
 import io.netty.util.AttributeKey
 import io.netty.util.concurrent.DefaultEventExecutorGroup
 import io.netty.util.concurrent.EventExecutorGroup
+import net.woggioni.jwo.JWO
+import net.woggioni.jwo.Tuple2
 import net.woggioni.rbcs.api.Configuration
 import net.woggioni.rbcs.api.exception.ConfigurationException
-import net.woggioni.rbcs.common.RBCS.toUrl
 import net.woggioni.rbcs.common.PasswordSecurity.decodePasswordHash
 import net.woggioni.rbcs.common.PasswordSecurity.hashPassword
+import net.woggioni.rbcs.common.RBCS.toUrl
 import net.woggioni.rbcs.common.Xml
-import net.woggioni.rbcs.common.contextLogger
+import net.woggioni.rbcs.common.createLogger
 import net.woggioni.rbcs.common.debug
 import net.woggioni.rbcs.common.info
 import net.woggioni.rbcs.server.auth.AbstractNettyHttpAuthenticator
@@ -46,10 +47,11 @@ import net.woggioni.rbcs.server.auth.RoleAuthorizer
 import net.woggioni.rbcs.server.configuration.Parser
 import net.woggioni.rbcs.server.configuration.Serializer
 import net.woggioni.rbcs.server.exception.ExceptionHandler
+import net.woggioni.rbcs.server.handler.MaxRequestSizeHandler
 import net.woggioni.rbcs.server.handler.ServerHandler
+import net.woggioni.rbcs.server.handler.TraceHandler
+import net.woggioni.rbcs.server.throttling.BucketManager
 import net.woggioni.rbcs.server.throttling.ThrottlingHandler
-import net.woggioni.jwo.JWO
-import net.woggioni.jwo.Tuple2
 import java.io.OutputStream
 import java.net.InetSocketAddress
 import java.nio.file.Files
@@ -57,18 +59,23 @@ import java.nio.file.Path
 import java.security.KeyStore
 import java.security.PrivateKey
 import java.security.cert.X509Certificate
+import java.time.Duration
+import java.time.Instant
 import java.util.Arrays
 import java.util.Base64
+import java.util.concurrent.CompletableFuture
+import java.util.concurrent.Future
 import java.util.concurrent.TimeUnit
+import java.util.concurrent.TimeoutException
 import java.util.regex.Matcher
 import java.util.regex.Pattern
 import javax.naming.ldap.LdapName
 import javax.net.ssl.SSLPeerUnverifiedException
 
 class RemoteBuildCacheServer(private val cfg: Configuration) {
-    private val log = contextLogger()
 
     companion object {
+        private val log = createLogger<RemoteBuildCacheServer>()
 
         val userAttribute: AttributeKey<Configuration.User> = AttributeKey.valueOf("user")
         val groupAttribute: AttributeKey<Set<Configuration.Group>> = AttributeKey.valueOf("group")
@@ -128,11 +135,12 @@ class RemoteBuildCacheServer(private val cfg: Configuration) {
                     val clientCertificate = peerCertificates.first() as X509Certificate
                     val user = userExtractor?.extract(clientCertificate)
                     val group = groupExtractor?.extract(clientCertificate)
-                    val allGroups = ((user?.groups ?: emptySet()).asSequence() + sequenceOf(group).filterNotNull()).toSet()
+                    val allGroups =
+                        ((user?.groups ?: emptySet()).asSequence() + sequenceOf(group).filterNotNull()).toSet()
                     AuthenticationResult(user, allGroups)
-                } ?: anonymousUserGroups?.let{ AuthenticationResult(null, it) }
+                } ?: anonymousUserGroups?.let { AuthenticationResult(null, it) }
             } catch (es: SSLPeerUnverifiedException) {
-                anonymousUserGroups?.let{ AuthenticationResult(null, it) }
+                anonymousUserGroups?.let { AuthenticationResult(null, it) }
             }
         }
     }
@@ -141,7 +149,9 @@ class RemoteBuildCacheServer(private val cfg: Configuration) {
     private class NettyHttpBasicAuthenticator(
         private val users: Map<String, Configuration.User>, authorizer: Authorizer
     ) : AbstractNettyHttpAuthenticator(authorizer) {
-        private val log = contextLogger()
+        companion object {
+            private val log = createLogger<NettyHttpBasicAuthenticator>()
+        }
 
         override fun authenticate(ctx: ChannelHandlerContext, req: HttpRequest): AuthenticationResult? {
             val authorizationHeader = req.headers()[HttpHeaderNames.AUTHORIZATION] ?: let {
@@ -191,7 +201,7 @@ class RemoteBuildCacheServer(private val cfg: Configuration) {
     private class ServerInitializer(
         private val cfg: Configuration,
         private val eventExecutorGroup: EventExecutorGroup
-    ) : ChannelInitializer<Channel>() {
+    ) : ChannelInitializer<Channel>(), AutoCloseable {
 
         companion object {
             private fun createSslCtx(tls: Configuration.Tls): SslContext {
@@ -213,7 +223,7 @@ class RemoteBuildCacheServer(private val cfg: Configuration) {
                             trustManager(
                                 ClientCertificateValidator.getTrustManager(ts, trustStore.isCheckCertificateStatus)
                             )
-                            if(trustStore.isRequireClientCertificate) ClientAuth.REQUIRE
+                            if (trustStore.isRequireClientCertificate) ClientAuth.REQUIRE
                             else ClientAuth.OPTIONAL
                         } ?: ClientAuth.NONE
                         clientAuth(clientAuth)
@@ -241,18 +251,13 @@ class RemoteBuildCacheServer(private val cfg: Configuration) {
                 }
                 return keystore
             }
+
+            private val log = createLogger<ServerInitializer>()
         }
 
-        private val log = contextLogger()
+        private val cacheHandlerFactory = cfg.cache.materialize()
 
-        private val serverHandler = let {
+        private val bucketManager = BucketManager.from(cfg)
-            val cacheImplementation = cfg.cache.materialize()
-            val prefix = Path.of("/").resolve(Path.of(cfg.serverPath ?: "/"))
-            ServerHandler(cacheImplementation, prefix)
-        }
-
-        private val exceptionHandler = ExceptionHandler()
-        private val throttlingHandler = ThrottlingHandler(cfg)
 
         private val authenticator = when (val auth = cfg.authentication) {
             is Configuration.BasicAuthentication -> NettyHttpBasicAuthenticator(cfg.users, RoleAuthorizer())
@@ -311,7 +316,7 @@ class RemoteBuildCacheServer(private val cfg: Configuration) {
             cfg.connection.also { conn ->
                 val readTimeout = conn.readTimeout.toMillis()
                 val writeTimeout = conn.writeTimeout.toMillis()
-                if(readTimeout > 0 || writeTimeout > 0) {
+                if (readTimeout > 0 || writeTimeout > 0) {
                     pipeline.addLast(
                         IdleStateHandler(
                             false,
@@ -325,7 +330,7 @@ class RemoteBuildCacheServer(private val cfg: Configuration) {
                 val readIdleTimeout = conn.readIdleTimeout.toMillis()
                 val writeIdleTimeout = conn.writeIdleTimeout.toMillis()
                 val idleTimeout = conn.idleTimeout.toMillis()
-                if(readIdleTimeout > 0 || writeIdleTimeout > 0 || idleTimeout > 0) {
+                if (readIdleTimeout > 0 || writeIdleTimeout > 0 || idleTimeout > 0) {
                     pipeline.addLast(
                         IdleStateHandler(
                             true,
@@ -340,16 +345,19 @@ class RemoteBuildCacheServer(private val cfg: Configuration) {
             pipeline.addLast(object : ChannelInboundHandlerAdapter() {
                 override fun userEventTriggered(ctx: ChannelHandlerContext, evt: Any) {
                     if (evt is IdleStateEvent) {
-                        when(evt.state()) {
+                        when (evt.state()) {
                             IdleState.READER_IDLE -> log.debug {
                                 "Read timeout reached on channel ${ch.id().asShortText()}, closing the connection"
                             }
+
                             IdleState.WRITER_IDLE -> log.debug {
                                 "Write timeout reached on channel ${ch.id().asShortText()}, closing the connection"
                             }
+
                             IdleState.ALL_IDLE -> log.debug {
                                 "Idle timeout reached on channel ${ch.id().asShortText()}, closing the connection"
                             }
+
                             null -> throw IllegalStateException("This should never happen")
                         }
                         ctx.close()
@@ -360,40 +368,94 @@ class RemoteBuildCacheServer(private val cfg: Configuration) {
                 pipeline.addLast(SSL_HANDLER_NAME, it)
             }
             pipeline.addLast(HttpServerCodec())
+            pipeline.addLast(MaxRequestSizeHandler.NAME, MaxRequestSizeHandler(cfg.connection.maxRequestSize))
             pipeline.addLast(HttpChunkContentCompressor(1024))
             pipeline.addLast(ChunkedWriteHandler())
-            pipeline.addLast(HttpObjectAggregator(cfg.connection.maxRequestSize))
             authenticator?.let {
                 pipeline.addLast(it)
             }
-            pipeline.addLast(throttlingHandler)
+            pipeline.addLast(ThrottlingHandler(bucketManager, cfg.connection))
-            pipeline.addLast(eventExecutorGroup, serverHandler)
+
-            pipeline.addLast(exceptionHandler)
+            val serverHandler = let {
+                val prefix = Path.of("/").resolve(Path.of(cfg.serverPath ?: "/"))
+                ServerHandler(prefix)
+            }
+            pipeline.addLast(eventExecutorGroup, ServerHandler.NAME, serverHandler)
+            pipeline.addLast(cacheHandlerFactory.newHandler())
+            pipeline.addLast(TraceHandler)
+            pipeline.addLast(ExceptionHandler)
+        }
+
+        override fun close() {
+            cacheHandlerFactory.close()
         }
     }
 
     class ServerHandle(
-        httpChannelFuture: ChannelFuture,
+        closeFuture: ChannelFuture,
-        private val executorGroups: Iterable<EventExecutorGroup>
+        private val bossGroup: EventExecutorGroup,
-    ) : AutoCloseable {
+        private val executorGroups: Iterable<EventExecutorGroup>,
-        private val httpChannel: Channel = httpChannelFuture.channel()
+        private val serverInitializer: AutoCloseable,
-        private val closeFuture: ChannelFuture = httpChannel.closeFuture()
+    ) : Future<Void> by from(closeFuture, executorGroups, serverInitializer) {
-        private val log = contextLogger()
 
-        fun shutdown(): ChannelFuture {
+        companion object {
-            return httpChannel.close()
+            private val log = createLogger<ServerHandle>()
-        }
 
-        override fun close() {
+            private fun from(
-            try {
+                closeFuture: ChannelFuture,
-                closeFuture.sync()
+                executorGroups: Iterable<EventExecutorGroup>,
-            } finally {
+                serverInitializer: AutoCloseable
-                executorGroups.forEach {
+            ): CompletableFuture<Void> {
-                    it.shutdownGracefully().sync()
+                val result = CompletableFuture<Void>()
+                closeFuture.addListener {
+                    val errors = mutableListOf<Throwable>()
+                    val deadline = Instant.now().plusSeconds(20)
+
+
+                    for (executorGroup in executorGroups) {
+                        val future = executorGroup.terminationFuture()
+                        try {
+                            val now = Instant.now()
+                            if (now > deadline) {
+                                future.get(0, TimeUnit.SECONDS)
+                            } else {
+                                future.get(Duration.between(now, deadline).toMillis(), TimeUnit.MILLISECONDS)
+                            }
+                        }
+                        catch (te: TimeoutException) {
+                            errors.addLast(te)
+                            log.warn("Timeout while waiting for shutdown of $executorGroup", te)
+                        } catch (ex: Throwable) {
+                            log.warn(ex.message, ex)
+                            errors.addLast(ex)
+                        }
+                    }
+                    try {
+                        serverInitializer.close()
+                    } catch (ex: Throwable) {
+                        log.error(ex.message, ex)
+                        errors.addLast(ex)
+                    }
+                    if(errors.isEmpty()) {
+                        result.complete(null)
+                    } else {
+                        result.completeExceptionally(errors.first())
+                    }
+                }
+
+                return result.thenAccept {
+                    log.info {
+                        "RemoteBuildCacheServer has been gracefully shut down"
+                    }
                 }
             }
-            log.info {
+        }
-                "RemoteBuildCacheServer has been gracefully shut down"
+
+
+        fun sendShutdownSignal() {
+            bossGroup.shutdownGracefully()
+            executorGroups.map {
+                it.shutdownGracefully()
             }
         }
     }
@@ -411,11 +473,12 @@ class RemoteBuildCacheServer(private val cfg: Configuration) {
             }
             DefaultEventExecutorGroup(Runtime.getRuntime().availableProcessors(), threadFactory)
         }
+        val serverInitializer = ServerInitializer(cfg, eventExecutorGroup)
         val bootstrap = ServerBootstrap().apply {
             // Configure the server
             group(bossGroup, workerGroup)
             channel(serverSocketChannel)
-            childHandler(ServerInitializer(cfg, eventExecutorGroup))
+            childHandler(serverInitializer)
             option(ChannelOption.SO_BACKLOG, cfg.incomingConnectionsBacklogSize)
             childOption(ChannelOption.SO_KEEPALIVE, true)
         }
@@ -423,10 +486,16 @@ class RemoteBuildCacheServer(private val cfg: Configuration) {
 
         // Bind and start to accept incoming connections.
         val bindAddress = InetSocketAddress(cfg.host, cfg.port)
-        val httpChannel = bootstrap.bind(bindAddress).sync()
+        val httpChannel = bootstrap.bind(bindAddress).sync().channel()
         log.info {
             "RemoteBuildCacheServer is listening on ${cfg.host}:${cfg.port}"
         }
-        return ServerHandle(httpChannel, setOf(bossGroup, workerGroup, eventExecutorGroup))
+
+        return ServerHandle(
+            httpChannel.closeFuture(),
+            bossGroup,
+            setOf(workerGroup, eventExecutorGroup),
+            serverInitializer
+        )
     }
 }

rbcs-server/src/main/kotlin/net/woggioni/rbcs/server/auth/Authenticator.kt

@@ -6,6 +6,7 @@ import io.netty.channel.ChannelHandlerContext
 import io.netty.channel.ChannelInboundHandlerAdapter
 import io.netty.handler.codec.http.DefaultFullHttpResponse
 import io.netty.handler.codec.http.FullHttpResponse
+import io.netty.handler.codec.http.HttpContent
 import io.netty.handler.codec.http.HttpHeaderNames
 import io.netty.handler.codec.http.HttpRequest
 import io.netty.handler.codec.http.HttpResponseStatus
@@ -57,6 +58,8 @@ abstract class AbstractNettyHttpAuthenticator(private val authorizer: Authorizer
             } else {
                 authorizationFailure(ctx, msg)
             }
+        } else if(msg is HttpContent) {
+            ctx.fireChannelRead(msg)
         }
     }
 

rbcs-server/src/main/kotlin/net/woggioni/rbcs/server/cache/FileSystemCache.kt

@@ -1,12 +1,14 @@
 package net.woggioni.rbcs.server.cache
 
-import io.netty.buffer.ByteBuf
-import net.woggioni.rbcs.api.Cache
-import net.woggioni.rbcs.common.ByteBufInputStream
-import net.woggioni.rbcs.common.RBCS.digestString
-import net.woggioni.rbcs.common.contextLogger
 import net.woggioni.jwo.JWO
-import net.woggioni.jwo.LockFile
+import net.woggioni.rbcs.api.CacheValueMetadata
+import net.woggioni.rbcs.common.createLogger
+import java.io.ByteArrayOutputStream
+import java.io.InputStream
+import java.io.ObjectInputStream
+import java.io.ObjectOutputStream
+import java.io.Serializable
+import java.nio.ByteBuffer
 import java.nio.channels.Channels
 import java.nio.channels.FileChannel
 import java.nio.file.Files
@@ -14,117 +16,143 @@ import java.nio.file.Path
 import java.nio.file.StandardCopyOption
 import java.nio.file.StandardOpenOption
 import java.nio.file.attribute.BasicFileAttributes
-import java.security.MessageDigest
 import java.time.Duration
 import java.time.Instant
-import java.util.concurrent.CompletableFuture
-import java.util.concurrent.atomic.AtomicReference
-import java.util.zip.Deflater
-import java.util.zip.DeflaterOutputStream
-import java.util.zip.Inflater
-import java.util.zip.InflaterInputStream
 
 class FileSystemCache(
     val root: Path,
-    val maxAge: Duration,
+    val maxAge: Duration
-    val digestAlgorithm: String?,
+) : AutoCloseable {
-    val compressionEnabled: Boolean,
+
-    val compressionLevel: Int
+    class EntryValue(val metadata: CacheValueMetadata, val channel : FileChannel, val offset : Long, val size : Long) : Serializable
-) : Cache {
 
     private companion object {
-        @JvmStatic
+        private val log = createLogger<FileSystemCache>()
-        private val log = contextLogger()
     }
 
     init {
         Files.createDirectories(root)
     }
 
-    private var nextGc = AtomicReference(Instant.now().plus(maxAge))
+    @Volatile
+    private var running = true
 
-    override fun get(key: String) = (digestAlgorithm
+    private var nextGc = Instant.now()
-        ?.let(MessageDigest::getInstance)
+
-        ?.let { md ->
+    fun get(key: String): EntryValue? =
-            digestString(key.toByteArray(), md)
+        root.resolve(key).takeIf(Files::exists)
-        } ?: key).let { digest ->
-        root.resolve(digest).takeIf(Files::exists)
             ?.let { file ->
-                file.takeIf(Files::exists)?.let { file ->
+                val size = Files.size(file)
-                    if (compressionEnabled) {
+                val channel = FileChannel.open(file, StandardOpenOption.READ)
-                        val inflater = Inflater()
+                val source = Channels.newInputStream(channel)
-                        Channels.newChannel(
+                val tmp = ByteArray(Integer.BYTES)
-                            InflaterInputStream(
+                val buffer = ByteBuffer.wrap(tmp)
-                                Channels.newInputStream(
+                source.read(tmp)
-                                    FileChannel.open(
+                buffer.rewind()
-                                        file,
+                val offset = (Integer.BYTES + buffer.getInt()).toLong()
-                                        StandardOpenOption.READ
+                var count = 0
-                                    )
+                val wrapper = object : InputStream() {
-                                ), inflater
+                    override fun read(): Int {
-                            )
+                        return source.read().also {
-                        )
+                            if (it > 0) count += it
-                    } else {
+                        }
-                        FileChannel.open(file, StandardOpenOption.READ)
+                    }
+
+                    override fun read(b: ByteArray, off: Int, len: Int): Int {
+                        return source.read(b, off, len).also {
+                            if (it > 0) count += it
+                        }
+                    }
+
+                    override fun close() {
                     }
                 }
-            }.also {
+                val metadata = ObjectInputStream(wrapper).use { ois ->
-                gc()
+                    ois.readObject() as CacheValueMetadata
-            }.let {
+                }
-                CompletableFuture.completedFuture(it)
+                EntryValue(metadata, channel, offset, size)
             }
+
+    class FileSink(metadata: CacheValueMetadata, private val path: Path, private val tmpFile: Path) {
+        val channel: FileChannel
+
+        init {
+            val baos = ByteArrayOutputStream()
+            ObjectOutputStream(baos).use {
+                it.writeObject(metadata)
+            }
+            Files.newOutputStream(tmpFile).use {
+                val bytes = baos.toByteArray()
+                val buffer = ByteBuffer.allocate(Integer.BYTES)
+                buffer.putInt(bytes.size)
+                buffer.rewind()
+                it.write(buffer.array())
+                it.write(bytes)
+            }
+            channel = FileChannel.open(tmpFile, StandardOpenOption.APPEND)
+        }
+
+        fun commit() {
+            channel.close()
+            Files.move(tmpFile, path, StandardCopyOption.ATOMIC_MOVE)
+        }
+
+        fun rollback() {
+            channel.close()
+            Files.delete(path)
+        }
     }
 
-    override fun put(key: String, content: ByteBuf): CompletableFuture<Void> {
+    fun put(
-        (digestAlgorithm
+        key: String,
-            ?.let(MessageDigest::getInstance)
+        metadata: CacheValueMetadata,
-            ?.let { md ->
+    ): FileSink {
-                digestString(key.toByteArray(), md)
+        val file = root.resolve(key)
-            } ?: key).let { digest ->
+        val tmpFile = Files.createTempFile(root, null, ".tmp")
-            val file = root.resolve(digest)
+        return FileSink(metadata, file, tmpFile)
-            val tmpFile = Files.createTempFile(root, null, ".tmp")
+    }
-            try {
+
-                Files.newOutputStream(tmpFile).let {
+    private val garbageCollector = Thread.ofVirtual().name("file-system-cache-gc").start {
-                    if (compressionEnabled) {
+        while (running) {
-                        val deflater = Deflater(compressionLevel)
-                        DeflaterOutputStream(it, deflater)
-                    } else {
-                        it
-                    }
-                }.use {
-                    JWO.copy(ByteBufInputStream(content), it)
-                }
-                Files.move(tmpFile, file, StandardCopyOption.ATOMIC_MOVE)
-            } catch (t: Throwable) {
-                Files.delete(tmpFile)
-                throw t
-            }
-        }.also {
             gc()
         }
-        return CompletableFuture.completedFuture(null)
     }
 
     private fun gc() {
         val now = Instant.now()
-        val oldValue = nextGc.getAndSet(now.plus(maxAge))
+        if (nextGc < now) {
-        if (oldValue < now) {
+            val oldestEntry = actualGc(now)
-            actualGc(now)
+            nextGc = (oldestEntry ?: now).plus(maxAge)
         }
+        Thread.sleep(minOf(Duration.between(now, nextGc), Duration.ofSeconds(1)))
     }
 
-    @Synchronized
+    /**
-    private fun actualGc(now: Instant) {
+     * Returns the creation timestamp of the oldest cache entry (if any)
-        Files.list(root).filter {
+     */
-            val creationTimeStamp = Files.readAttributes(it, BasicFileAttributes::class.java)
+    private fun actualGc(now: Instant): Instant? {
-                .creationTime()
+        var result: Instant? = null
-                .toInstant()
+        Files.list(root)
-            now > creationTimeStamp.plus(maxAge)
+            .filter { path ->
-        }.forEach { file ->
+                JWO.splitExtension(path)
-            LockFile.acquire(file, false).use {
+                    .map { it._2 }
-                Files.delete(file)
+                    .map { it != ".tmp" }
+                    .orElse(true)
             }
-        }
+            .filter {
+                val creationTimeStamp = Files.readAttributes(it, BasicFileAttributes::class.java)
+                    .creationTime()
+                    .toInstant()
+                if (result == null || creationTimeStamp < result) {
+                    result = creationTimeStamp
+                }
+                now > creationTimeStamp.plus(maxAge)
+            }.forEach(Files::delete)
+        return result
     }
 
-    override fun close() {}
+    override fun close() {
+        running = false
+        garbageCollector.join()
+    }
 }

rbcs-server/src/main/kotlin/net/woggioni/rbcs/server/cache/FileSystemCacheConfiguration.kt

@@ -1,8 +1,9 @@
 package net.woggioni.rbcs.server.cache
 
+import net.woggioni.jwo.Application
+import net.woggioni.rbcs.api.CacheHandlerFactory
 import net.woggioni.rbcs.api.Configuration
 import net.woggioni.rbcs.common.RBCS
-import net.woggioni.jwo.Application
 import java.nio.file.Path
 import java.time.Duration
 
@@ -12,14 +13,18 @@ data class FileSystemCacheConfiguration(
     val digestAlgorithm : String?,
     val compressionEnabled: Boolean,
     val compressionLevel: Int,
+    val chunkSize: Int,
 ) : Configuration.Cache {
-    override fun materialize() = FileSystemCache(
+
-        root ?: Application.builder("rbcs").build().computeCacheDirectory(),
+    override fun materialize() = object : CacheHandlerFactory {
-        maxAge,
+        private val cache = FileSystemCache(root ?: Application.builder("rbcs").build().computeCacheDirectory(), maxAge)
-        digestAlgorithm,
+
-        compressionEnabled,
+        override fun close() {
-        compressionLevel
+            cache.close()
-    )
+        }
+
+        override fun newHandler() = FileSystemCacheHandler(cache, digestAlgorithm, compressionEnabled, compressionLevel, chunkSize)
+    }
 
     override fun getNamespaceURI() = RBCS.RBCS_NAMESPACE_URI
 

rbcs-server/src/main/kotlin/net/woggioni/rbcs/server/cache/FileSystemCacheHandler.kt

@@ -0,0 +1,122 @@
+package net.woggioni.rbcs.server.cache
+
+import io.netty.buffer.ByteBuf
+import io.netty.channel.ChannelHandlerContext
+import io.netty.channel.SimpleChannelInboundHandler
+import io.netty.handler.codec.http.LastHttpContent
+import io.netty.handler.stream.ChunkedNioFile
+import net.woggioni.rbcs.api.message.CacheMessage
+import net.woggioni.rbcs.api.message.CacheMessage.CacheContent
+import net.woggioni.rbcs.api.message.CacheMessage.CacheGetRequest
+import net.woggioni.rbcs.api.message.CacheMessage.CachePutRequest
+import net.woggioni.rbcs.api.message.CacheMessage.CachePutResponse
+import net.woggioni.rbcs.api.message.CacheMessage.CacheValueFoundResponse
+import net.woggioni.rbcs.api.message.CacheMessage.CacheValueNotFoundResponse
+import net.woggioni.rbcs.api.message.CacheMessage.LastCacheContent
+import net.woggioni.rbcs.common.RBCS.processCacheKey
+import java.nio.channels.Channels
+import java.util.Base64
+import java.util.zip.Deflater
+import java.util.zip.DeflaterOutputStream
+import java.util.zip.InflaterInputStream
+
+class FileSystemCacheHandler(
+    private val cache: FileSystemCache,
+    private val digestAlgorithm: String?,
+    private val compressionEnabled: Boolean,
+    private val compressionLevel: Int,
+    private val chunkSize: Int
+) : SimpleChannelInboundHandler<CacheMessage>() {
+
+    private inner class InProgressPutRequest(
+        val key : String,
+        private val fileSink : FileSystemCache.FileSink
+    ) {
+
+        private val stream = Channels.newOutputStream(fileSink.channel).let {
+            if (compressionEnabled) {
+                DeflaterOutputStream(it, Deflater(compressionLevel))
+            } else {
+                it
+            }
+        }
+
+        fun write(buf: ByteBuf) {
+            buf.readBytes(stream, buf.readableBytes())
+        }
+
+        fun commit() {
+            stream.close()
+            fileSink.commit()
+        }
+
+        fun rollback() {
+            fileSink.rollback()
+        }
+    }
+
+    private var inProgressPutRequest: InProgressPutRequest? = null
+
+    override fun channelRead0(ctx: ChannelHandlerContext, msg: CacheMessage) {
+        when (msg) {
+            is CacheGetRequest -> handleGetRequest(ctx, msg)
+            is CachePutRequest -> handlePutRequest(ctx, msg)
+            is LastCacheContent -> handleLastCacheContent(ctx, msg)
+            is CacheContent -> handleCacheContent(ctx, msg)
+            else -> ctx.fireChannelRead(msg)
+        }
+    }
+
+    private fun handleGetRequest(ctx: ChannelHandlerContext, msg: CacheGetRequest) {
+        val key = String(Base64.getUrlEncoder().encode(processCacheKey(msg.key, digestAlgorithm)))
+        cache.get(key)?.also { entryValue ->
+            ctx.writeAndFlush(CacheValueFoundResponse(msg.key, entryValue.metadata))
+            entryValue.channel.let { channel ->
+                if(compressionEnabled) {
+                    InflaterInputStream(Channels.newInputStream(channel)).use { stream ->
+
+                        outerLoop@
+                        while (true) {
+                            val buf = ctx.alloc().heapBuffer(chunkSize)
+                            while(buf.readableBytes() < chunkSize) {
+                                val read = buf.writeBytes(stream, chunkSize)
+                                if(read < 0) {
+                                    ctx.writeAndFlush(LastCacheContent(buf))
+                                    break@outerLoop
+                                }
+                            }
+                            ctx.writeAndFlush(CacheContent(buf))
+                        }
+                    }
+                } else {
+                    ctx.writeAndFlush(ChunkedNioFile(channel, entryValue.offset, entryValue.size - entryValue.offset, chunkSize))
+                    ctx.writeAndFlush(LastHttpContent.EMPTY_LAST_CONTENT)
+                }
+            }
+        } ?: ctx.writeAndFlush(CacheValueNotFoundResponse())
+    }
+
+    private fun handlePutRequest(ctx: ChannelHandlerContext, msg: CachePutRequest) {
+        val key = String(Base64.getUrlEncoder().encode(processCacheKey(msg.key, digestAlgorithm)))
+        val sink = cache.put(key, msg.metadata)
+        inProgressPutRequest = InProgressPutRequest(msg.key, sink)
+    }
+
+    private fun handleCacheContent(ctx: ChannelHandlerContext, msg: CacheContent) {
+        inProgressPutRequest!!.write(msg.content())
+    }
+
+    private fun handleLastCacheContent(ctx: ChannelHandlerContext, msg: LastCacheContent) {
+        inProgressPutRequest?.let { request ->
+            inProgressPutRequest = null
+            request.write(msg.content())
+            request.commit()
+            ctx.writeAndFlush(CachePutResponse(request.key))
+        }
+    }
+
+    override fun exceptionCaught(ctx: ChannelHandlerContext, cause: Throwable) {
+        inProgressPutRequest?.rollback()
+        super.exceptionCaught(ctx, cause)
+    }
+}

rbcs-server/src/main/kotlin/net/woggioni/rbcs/server/cache/FileSystemCacheProvider.kt

@@ -31,13 +31,17 @@ class FileSystemCacheProvider : CacheProvider<FileSystemCacheConfiguration> {
             ?.let(String::toInt)
             ?: Deflater.DEFAULT_COMPRESSION
         val digestAlgorithm = el.renderAttribute("digest") ?: "MD5"
+        val chunkSize = el.renderAttribute("chunk-size")
+            ?.let(Integer::decode)
+            ?: 0x10000
 
         return FileSystemCacheConfiguration(
             path,
             maxAge,
             digestAlgorithm,
             enableCompression,
-            compressionLevel
+            compressionLevel,
+            chunkSize
         )
     }
 
@@ -46,7 +50,9 @@ class FileSystemCacheProvider : CacheProvider<FileSystemCacheConfiguration> {
         Xml.of(doc, result) {
             val prefix = doc.lookupPrefix(RBCS.RBCS_NAMESPACE_URI)
             attr("xs:type", "${prefix}:fileSystemCacheType", RBCS.XML_SCHEMA_NAMESPACE_URI)
-            attr("path", root.toString())
+            root?.let {
+                attr("path", it.toString())
+            }
             attr("max-age", maxAge.toString())
             digestAlgorithm?.let { digestAlgorithm ->
                 attr("digest", digestAlgorithm)
@@ -57,6 +63,7 @@ class FileSystemCacheProvider : CacheProvider<FileSystemCacheConfiguration> {
             }?.let {
                 attr("compression-level", it.toString())
             }
+            attr("chunk-size", chunkSize.toString())
         }
         result
     }

rbcs-server/src/main/kotlin/net/woggioni/rbcs/server/cache/InMemoryCache.kt

@@ -1,89 +1,85 @@
 package net.woggioni.rbcs.server.cache
 
 import io.netty.buffer.ByteBuf
-import net.woggioni.rbcs.api.Cache
+import net.woggioni.rbcs.api.CacheValueMetadata
-import net.woggioni.rbcs.common.ByteBufInputStream
+import net.woggioni.rbcs.common.createLogger
-import net.woggioni.rbcs.common.ByteBufOutputStream
-import net.woggioni.rbcs.common.RBCS.digestString
-import net.woggioni.rbcs.common.contextLogger
-import net.woggioni.jwo.JWO
-import java.nio.channels.Channels
-import java.security.MessageDigest
 import java.time.Duration
 import java.time.Instant
-import java.util.concurrent.CompletableFuture
 import java.util.concurrent.ConcurrentHashMap
 import java.util.concurrent.PriorityBlockingQueue
+import java.util.concurrent.TimeUnit
 import java.util.concurrent.atomic.AtomicLong
-import java.util.zip.Deflater
+
-import java.util.zip.DeflaterOutputStream
+private class CacheKey(private val value: ByteArray) {
-import java.util.zip.Inflater
+    override fun equals(other: Any?) = if (other is CacheKey) {
-import java.util.zip.InflaterInputStream
+        value.contentEquals(other.value)
+    } else false
+
+    override fun hashCode() = value.contentHashCode()
+}
+
+class CacheEntry(
+    val metadata: CacheValueMetadata,
+    val content: ByteBuf
+)
 
 class InMemoryCache(
-    val maxAge: Duration,
+    private val maxAge: Duration,
-    val maxSize: Long,
+    private val maxSize: Long
-    val digestAlgorithm: String?,
+) : AutoCloseable {
-    val compressionEnabled: Boolean,
-    val compressionLevel: Int
-) : Cache {
 
     companion object {
-        @JvmStatic
+        private val log = createLogger<InMemoryCache>()
-        private val log = contextLogger()
     }
 
     private val size = AtomicLong()
-    private val map = ConcurrentHashMap<String, ByteBuf>()
+    private val map = ConcurrentHashMap<CacheKey, CacheEntry>()
-    
+
-    private class RemovalQueueElement(val key: String, val value : ByteBuf, val expiry : Instant) : Comparable<RemovalQueueElement> {
+    private class RemovalQueueElement(val key: CacheKey, val value: CacheEntry, val expiry: Instant) :
+        Comparable<RemovalQueueElement> {
         override fun compareTo(other: RemovalQueueElement) = expiry.compareTo(other.expiry)
     }
 
     private val removalQueue = PriorityBlockingQueue<RemovalQueueElement>()
 
+    @Volatile
     private var running = true
-    private val garbageCollector = Thread {
+
-        while(true) {
+    private val garbageCollector = Thread.ofVirtual().name("in-memory-cache-gc").start {
-            val el = removalQueue.take()
+        while (running) {
-            val buf = el.value
+            val el = removalQueue.poll(1, TimeUnit.SECONDS) ?: continue
+            val value = el.value
             val now = Instant.now()
-            if(now > el.expiry) {
+            if (now > el.expiry) {
-                val removed = map.remove(el.key, buf)
+                val removed = map.remove(el.key, value)
-                if(removed) {
+                if (removed) {
-                    updateSizeAfterRemoval(buf)
+                    updateSizeAfterRemoval(value.content)
                     //Decrease the reference count for map
-                    buf.release()
+                    value.content.release()
                 }
-                //Decrease the reference count for removalQueue
-                buf.release()
             } else {
                 removalQueue.put(el)
                 Thread.sleep(minOf(Duration.between(now, el.expiry), Duration.ofSeconds(1)))
             }
         }
-    }.apply {
-        start()
     }
 
-    private fun removeEldest() : Long {
+    private fun removeEldest(): Long {
-        while(true) {
+        while (true) {
             val el = removalQueue.take()
-            val buf = el.value
+            val value = el.value
-            val removed = map.remove(el.key, buf)
+            val removed = map.remove(el.key, value)
-            //Decrease the reference count for removalQueue
+            if (removed) {
-            buf.release()
+                val newSize = updateSizeAfterRemoval(value.content)
-            if(removed) {
-                val newSize = updateSizeAfterRemoval(buf)
                 //Decrease the reference count for map
-                buf.release()
+                value.content.release()
                 return newSize
             }
         }
     }
 
-    private fun updateSizeAfterRemoval(removed: ByteBuf) : Long {
+    private fun updateSizeAfterRemoval(removed: ByteBuf): Long {
-        return size.updateAndGet { currentSize : Long ->
+        return size.updateAndGet { currentSize: Long ->
             currentSize - removed.readableBytes()
         }
     }
@@ -93,58 +89,27 @@ class InMemoryCache(
         garbageCollector.join()
     }
 
-    override fun get(key: String) =
+    fun get(key: ByteArray) = map[CacheKey(key)]?.run {
-        (digestAlgorithm
+        CacheEntry(metadata, content.retainedDuplicate())
-            ?.let(MessageDigest::getInstance)
+    }
-            ?.let { md ->
-                digestString(key.toByteArray(), md)
-            } ?: key
-                ).let { digest ->
-                map[digest]
-                    ?.let { value ->
-                    val copy = value.retainedDuplicate()
-                    copy.touch("This has to be released by the caller of the cache")
-                    if (compressionEnabled) {
-                        val inflater = Inflater()
-                        Channels.newChannel(InflaterInputStream(ByteBufInputStream(copy), inflater))
-                    } else {
-                        Channels.newChannel(ByteBufInputStream(copy))
-                    }
-                }
-            }.let {
-                CompletableFuture.completedFuture(it)
-            }
 
-    override fun put(key: String, content: ByteBuf) =
+    fun put(
-        (digestAlgorithm
+        key: ByteArray,
-            ?.let(MessageDigest::getInstance)
+        value: CacheEntry,
-            ?.let { md ->
+    ) {
-                digestString(key.toByteArray(), md)
+        val cacheKey = CacheKey(key)
-            } ?: key).let { digest ->
+        val oldSize = map.put(cacheKey, value)?.let { old ->
-            content.retain()
+            val result = old.content.readableBytes()
-            val value = if (compressionEnabled) {
+            old.content.release()
-                val deflater = Deflater(compressionLevel)
+            result
-                val buf = content.alloc().buffer()
+        } ?: 0
-                buf.retain()
+        val delta = value.content.readableBytes() - oldSize
-                DeflaterOutputStream(ByteBufOutputStream(buf), deflater).use { outputStream ->
+        var newSize = size.updateAndGet { currentSize: Long ->
-                    ByteBufInputStream(content).use { inputStream ->
+            currentSize + delta
-                        JWO.copy(inputStream, outputStream)
-                    }
-                }
-                buf
-            } else {
-                content
-            }
-            val old = map.put(digest, value)
-            val delta = value.readableBytes() - (old?.readableBytes() ?: 0)
-            var newSize = size.updateAndGet { currentSize : Long ->
-                currentSize + delta
-            }
-            removalQueue.put(RemovalQueueElement(digest, value.retain(), Instant.now().plus(maxAge)))
-            while(newSize > maxSize) {
-                newSize = removeEldest()
-            }
-        }.let {
-            CompletableFuture.completedFuture<Void>(null)
         }
+        removalQueue.put(RemovalQueueElement(cacheKey, value, Instant.now().plus(maxAge)))
+        while (newSize > maxSize) {
+            newSize = removeEldest()
+        }
+    }
 }

rbcs-server/src/main/kotlin/net/woggioni/rbcs/server/cache/InMemoryCacheConfiguration.kt

@@ -1,5 +1,6 @@
 package net.woggioni.rbcs.server.cache
 
+import net.woggioni.rbcs.api.CacheHandlerFactory
 import net.woggioni.rbcs.api.Configuration
 import net.woggioni.rbcs.common.RBCS
 import java.time.Duration
@@ -10,14 +11,17 @@ data class InMemoryCacheConfiguration(
     val digestAlgorithm : String?,
     val compressionEnabled: Boolean,
     val compressionLevel: Int,
+    val chunkSize : Int
 ) : Configuration.Cache {
-    override fun materialize() = InMemoryCache(
+    override fun materialize() = object : CacheHandlerFactory {
-        maxAge,
+        private val cache = InMemoryCache(maxAge, maxSize)
-        maxSize,
+
-        digestAlgorithm,
+        override fun close() {
-        compressionEnabled,
+            cache.close()
-        compressionLevel
+        }
-    )
+
+        override fun newHandler() = InMemoryCacheHandler(cache, digestAlgorithm, compressionEnabled, compressionLevel)
+    }
 
     override fun getNamespaceURI() = RBCS.RBCS_NAMESPACE_URI
 

rbcs-server/src/main/kotlin/net/woggioni/rbcs/server/cache/InMemoryCacheHandler.kt

@@ -0,0 +1,135 @@
+package net.woggioni.rbcs.server.cache
+
+import io.netty.buffer.ByteBuf
+import io.netty.channel.ChannelHandlerContext
+import io.netty.channel.SimpleChannelInboundHandler
+import net.woggioni.rbcs.api.message.CacheMessage
+import net.woggioni.rbcs.api.message.CacheMessage.CacheContent
+import net.woggioni.rbcs.api.message.CacheMessage.CacheGetRequest
+import net.woggioni.rbcs.api.message.CacheMessage.CachePutRequest
+import net.woggioni.rbcs.api.message.CacheMessage.CachePutResponse
+import net.woggioni.rbcs.api.message.CacheMessage.CacheValueFoundResponse
+import net.woggioni.rbcs.api.message.CacheMessage.CacheValueNotFoundResponse
+import net.woggioni.rbcs.api.message.CacheMessage.LastCacheContent
+import net.woggioni.rbcs.common.ByteBufOutputStream
+import net.woggioni.rbcs.common.RBCS.processCacheKey
+import java.util.zip.Deflater
+import java.util.zip.DeflaterOutputStream
+import java.util.zip.InflaterOutputStream
+
+class InMemoryCacheHandler(
+    private val cache: InMemoryCache,
+    private val digestAlgorithm: String?,
+    private val compressionEnabled: Boolean,
+    private val compressionLevel: Int
+) : SimpleChannelInboundHandler<CacheMessage>() {
+
+    private interface InProgressPutRequest : AutoCloseable {
+        val request: CachePutRequest
+        val buf: ByteBuf
+
+        fun append(buf: ByteBuf)
+    }
+
+    private inner class InProgressPlainPutRequest(ctx: ChannelHandlerContext, override val request: CachePutRequest) :
+        InProgressPutRequest {
+        override val buf = ctx.alloc().compositeBuffer()
+
+        private val stream = ByteBufOutputStream(buf).let {
+            if (compressionEnabled) {
+                DeflaterOutputStream(it, Deflater(compressionLevel))
+            } else {
+                it
+            }
+        }
+
+        override fun append(buf: ByteBuf) {
+            this.buf.addComponent(true, buf.retain())
+        }
+
+        override fun close() {
+            buf.release()
+        }
+    }
+
+    private inner class InProgressCompressedPutRequest(
+        ctx: ChannelHandlerContext,
+        override val request: CachePutRequest
+    ) : InProgressPutRequest {
+
+        override val buf = ctx.alloc().heapBuffer()
+
+        private val stream = ByteBufOutputStream(buf).let {
+            DeflaterOutputStream(it, Deflater(compressionLevel))
+        }
+
+        override fun append(buf: ByteBuf) {
+            buf.readBytes(stream, buf.readableBytes())
+        }
+
+        override fun close() {
+            stream.close()
+        }
+    }
+
+    private var inProgressPutRequest: InProgressPutRequest? = null
+
+    override fun channelRead0(ctx: ChannelHandlerContext, msg: CacheMessage) {
+        when (msg) {
+            is CacheGetRequest -> handleGetRequest(ctx, msg)
+            is CachePutRequest -> handlePutRequest(ctx, msg)
+            is LastCacheContent -> handleLastCacheContent(ctx, msg)
+            is CacheContent -> handleCacheContent(ctx, msg)
+            else -> ctx.fireChannelRead(msg)
+        }
+    }
+
+    private fun handleGetRequest(ctx: ChannelHandlerContext, msg: CacheGetRequest) {
+        cache.get(processCacheKey(msg.key, digestAlgorithm))?.let { value ->
+            ctx.writeAndFlush(CacheValueFoundResponse(msg.key, value.metadata))
+            if (compressionEnabled) {
+                val buf = ctx.alloc().heapBuffer()
+                InflaterOutputStream(ByteBufOutputStream(buf)).use {
+                    value.content.readBytes(it, value.content.readableBytes())
+                    buf.retain()
+                }
+                ctx.writeAndFlush(LastCacheContent(buf))
+            } else {
+                ctx.writeAndFlush(LastCacheContent(value.content))
+            }
+        } ?: ctx.writeAndFlush(CacheValueNotFoundResponse())
+    }
+
+    private fun handlePutRequest(ctx: ChannelHandlerContext, msg: CachePutRequest) {
+        inProgressPutRequest = if(compressionEnabled) {
+            InProgressCompressedPutRequest(ctx, msg)
+        } else {
+            InProgressPlainPutRequest(ctx, msg)
+        }
+    }
+
+    private fun handleCacheContent(ctx: ChannelHandlerContext, msg: CacheContent) {
+        inProgressPutRequest?.append(msg.content())
+    }
+
+    private fun handleLastCacheContent(ctx: ChannelHandlerContext, msg: LastCacheContent) {
+        handleCacheContent(ctx, msg)
+        inProgressPutRequest?.let { inProgressRequest ->
+            inProgressPutRequest = null
+            val buf = inProgressRequest.buf
+            buf.retain()
+            inProgressRequest.close()
+            val cacheKey = processCacheKey(inProgressRequest.request.key, digestAlgorithm)
+            cache.put(cacheKey, CacheEntry(inProgressRequest.request.metadata, buf))
+            ctx.writeAndFlush(CachePutResponse(inProgressRequest.request.key))
+        }
+    }
+
+    override fun exceptionCaught(ctx: ChannelHandlerContext, cause: Throwable) {
+        inProgressPutRequest?.let { req ->
+            req.buf.release()
+            inProgressPutRequest = null
+        }
+        super.exceptionCaught(ctx, cause)
+    }
+}

rbcs-server/src/main/kotlin/net/woggioni/rbcs/server/cache/InMemoryCacheProvider.kt

@@ -31,13 +31,16 @@ class InMemoryCacheProvider : CacheProvider<InMemoryCacheConfiguration> {
             ?.let(String::toInt)
             ?: Deflater.DEFAULT_COMPRESSION
         val digestAlgorithm = el.renderAttribute("digest") ?: "MD5"
-
+        val chunkSize = el.renderAttribute("chunk-size")
+            ?.let(Integer::decode)
+            ?: 0x10000
         return InMemoryCacheConfiguration(
             maxAge,
             maxSize,
             digestAlgorithm,
             enableCompression,
-            compressionLevel
+            compressionLevel,
+            chunkSize
         )
     }
 
@@ -57,6 +60,7 @@ class InMemoryCacheProvider : CacheProvider<InMemoryCacheConfiguration> {
             }?.let {
                 attr("compression-level", it.toString())
             }
+            attr("chunk-size", chunkSize.toString())
         }
         result
     }

rbcs-server/src/main/kotlin/net/woggioni/rbcs/server/configuration/Parser.kt

@@ -124,7 +124,7 @@ object Parser {
                     val writeIdleTimeout = child.renderAttribute("write-idle-timeout")
                         ?.let(Duration::parse) ?: Duration.of(60, ChronoUnit.SECONDS)
                     val maxRequestSize = child.renderAttribute("max-request-size")
-                        ?.let(String::toInt) ?: 67108864
+                        ?.let(Integer::decode) ?: 0x4000000
                     connection = Configuration.Connection(
                         readTimeout,
                         writeTimeout,

rbcs-server/src/main/kotlin/net/woggioni/rbcs/server/exception/ExceptionHandler.kt

@@ -3,7 +3,7 @@ package net.woggioni.rbcs.server.exception
 import io.netty.buffer.Unpooled
 import io.netty.channel.ChannelDuplexHandler
 import io.netty.channel.ChannelFutureListener
-import io.netty.channel.ChannelHandler
+import io.netty.channel.ChannelHandler.Sharable
 import io.netty.channel.ChannelHandlerContext
 import io.netty.handler.codec.DecoderException
 import io.netty.handler.codec.http.DefaultFullHttpResponse
@@ -17,10 +17,16 @@ import net.woggioni.rbcs.api.exception.CacheException
 import net.woggioni.rbcs.api.exception.ContentTooLargeException
 import net.woggioni.rbcs.common.contextLogger
 import net.woggioni.rbcs.common.debug
+import net.woggioni.rbcs.common.log
+import org.slf4j.event.Level
+import org.slf4j.spi.LoggingEventBuilder
+import java.net.ConnectException
+import java.net.SocketException
+import javax.net.ssl.SSLException
 import javax.net.ssl.SSLPeerUnverifiedException
 
-@ChannelHandler.Sharable
+@Sharable
-class ExceptionHandler : ChannelDuplexHandler() {
+object ExceptionHandler : ChannelDuplexHandler() {
     private val log = contextLogger()
 
     private val NOT_AUTHORIZED: FullHttpResponse = DefaultFullHttpResponse(
@@ -29,12 +35,6 @@ class ExceptionHandler : ChannelDuplexHandler() {
         headers()[HttpHeaderNames.CONTENT_LENGTH] = "0"
     }
 
-    private val TOO_BIG: FullHttpResponse = DefaultFullHttpResponse(
-        HttpVersion.HTTP_1_1, HttpResponseStatus.REQUEST_ENTITY_TOO_LARGE, Unpooled.EMPTY_BUFFER
-    ).apply {
-        headers()[HttpHeaderNames.CONTENT_LENGTH] = "0"
-    }
-
     private val NOT_AVAILABLE: FullHttpResponse = DefaultFullHttpResponse(
         HttpVersion.HTTP_1_1, HttpResponseStatus.SERVICE_UNAVAILABLE, Unpooled.EMPTY_BUFFER
     ).apply {
@@ -47,10 +47,26 @@ class ExceptionHandler : ChannelDuplexHandler() {
         headers()[HttpHeaderNames.CONTENT_LENGTH] = "0"
     }
 
+    private val TOO_BIG: FullHttpResponse = DefaultFullHttpResponse(
+        HttpVersion.HTTP_1_1, HttpResponseStatus.REQUEST_ENTITY_TOO_LARGE, Unpooled.EMPTY_BUFFER
+    ).apply {
+        headers()[HttpHeaderNames.CONTENT_LENGTH] = "0"
+    }
+
     override fun exceptionCaught(ctx: ChannelHandlerContext, cause: Throwable) {
         when (cause) {
             is DecoderException -> {
+                log.debug(cause.message, cause)
+                ctx.close()
+            }
+
+            is ConnectException -> {
                 log.error(cause.message, cause)
+                ctx.writeAndFlush(SERVER_ERROR.retainedDuplicate())
+            }
+
+            is SocketException -> {
+                log.debug(cause.message, cause)
                 ctx.close()
             }
 
@@ -59,10 +75,19 @@ class ExceptionHandler : ChannelDuplexHandler() {
                     .addListener(ChannelFutureListener.CLOSE_ON_FAILURE)
             }
 
+            is SSLException -> {
+                log.debug(cause.message, cause)
+                ctx.close()
+            }
+
             is ContentTooLargeException -> {
+                log.log(Level.DEBUG, ctx.channel()) { builder : LoggingEventBuilder ->
+                    builder.setMessage("Request body is too large")
+                }
                 ctx.writeAndFlush(TOO_BIG.retainedDuplicate())
                     .addListener(ChannelFutureListener.CLOSE_ON_FAILURE)
             }
+
             is ReadTimeoutException -> {
                 log.debug {
                     val channelId = ctx.channel().id().asShortText()
@@ -70,6 +95,7 @@ class ExceptionHandler : ChannelDuplexHandler() {
                 }
                 ctx.close()
             }
+
             is WriteTimeoutException -> {
                 log.debug {
                     val channelId = ctx.channel().id().asShortText()
@@ -77,11 +103,13 @@ class ExceptionHandler : ChannelDuplexHandler() {
                 }
                 ctx.close()
             }
+
             is CacheException -> {
                 log.error(cause.message, cause)
                 ctx.writeAndFlush(NOT_AVAILABLE.retainedDuplicate())
                     .addListener(ChannelFutureListener.CLOSE_ON_FAILURE)
             }
+
             else -> {
                 log.error(cause.message, cause)
                 ctx.writeAndFlush(SERVER_ERROR.retainedDuplicate())

rbcs-server/src/main/kotlin/net/woggioni/rbcs/server/handler/CacheContentHandler.kt

@@ -0,0 +1,28 @@
+package net.woggioni.rbcs.server.handler
+
+import io.netty.channel.ChannelHandler.Sharable
+import io.netty.channel.ChannelHandlerContext
+import io.netty.channel.SimpleChannelInboundHandler
+import io.netty.handler.codec.http.HttpContent
+import io.netty.handler.codec.http.LastHttpContent
+import net.woggioni.rbcs.api.message.CacheMessage.CacheContent
+import net.woggioni.rbcs.api.message.CacheMessage.LastCacheContent
+
+@Sharable
+object CacheContentHandler : SimpleChannelInboundHandler<HttpContent>() {
+    val NAME = this::class.java.name
+
+    override fun channelRead0(ctx: ChannelHandlerContext, msg: HttpContent) {
+        when(msg) {
+            is LastHttpContent -> {
+                ctx.fireChannelRead(LastCacheContent(msg.content().retain()))
+                ctx.pipeline().remove(this)
+            }
+            else -> ctx.fireChannelRead(CacheContent(msg.content().retain()))
+        }
+    }
+
+    override fun exceptionCaught(ctx: ChannelHandlerContext?, cause: Throwable?) {
+        super.exceptionCaught(ctx, cause)
+    }
+}

rbcs-server/src/main/kotlin/net/woggioni/rbcs/server/handler/MaxRequestSizeHandler.kt

@@ -0,0 +1,40 @@
+package net.woggioni.rbcs.server.handler
+
+import io.netty.channel.ChannelHandlerContext
+import io.netty.channel.ChannelInboundHandlerAdapter
+import io.netty.handler.codec.http.HttpContent
+import io.netty.handler.codec.http.HttpRequest
+import net.woggioni.rbcs.api.exception.ContentTooLargeException
+
+
+class MaxRequestSizeHandler(private val maxRequestSize : Int) : ChannelInboundHandlerAdapter() {
+    companion object {
+        val NAME = MaxRequestSizeHandler::class.java.name
+    }
+
+    private var cumulativeSize = 0
+
+    override fun channelRead(ctx: ChannelHandlerContext, msg: Any) {
+        when(msg) {
+            is HttpRequest -> {
+                cumulativeSize = 0
+                ctx.fireChannelRead(msg)
+            }
+            is HttpContent -> {
+                val exceeded = cumulativeSize > maxRequestSize
+                if(!exceeded) {
+                    cumulativeSize += msg.content().readableBytes()
+                }
+                if(cumulativeSize > maxRequestSize) {
+                    msg.release()
+                    if(!exceeded) {
+                        ctx.fireExceptionCaught(ContentTooLargeException("Request body is too large", null))
+                    }
+                } else {
+                    ctx.fireChannelRead(msg)
+                }
+            }
+            else -> ctx.fireChannelRead(msg)
+        }
+    }
+}

rbcs-server/src/main/kotlin/net/woggioni/rbcs/server/handler/ServerHandler.kt

@@ -1,95 +1,148 @@
 package net.woggioni.rbcs.server.handler
 
-import io.netty.buffer.Unpooled
+import io.netty.channel.ChannelDuplexHandler
-import io.netty.channel.ChannelFutureListener
-import io.netty.channel.ChannelHandler
 import io.netty.channel.ChannelHandlerContext
-import io.netty.channel.DefaultFileRegion
+import io.netty.channel.ChannelPromise
-import io.netty.channel.SimpleChannelInboundHandler
 import io.netty.handler.codec.http.DefaultFullHttpResponse
+import io.netty.handler.codec.http.DefaultHttpContent
 import io.netty.handler.codec.http.DefaultHttpResponse
-import io.netty.handler.codec.http.FullHttpRequest
+import io.netty.handler.codec.http.DefaultLastHttpContent
 import io.netty.handler.codec.http.HttpHeaderNames
 import io.netty.handler.codec.http.HttpHeaderValues
+import io.netty.handler.codec.http.HttpHeaders
 import io.netty.handler.codec.http.HttpMethod
+import io.netty.handler.codec.http.HttpRequest
 import io.netty.handler.codec.http.HttpResponseStatus
 import io.netty.handler.codec.http.HttpUtil
-import io.netty.handler.codec.http.LastHttpContent
+import io.netty.handler.codec.http.HttpVersion
-import io.netty.handler.stream.ChunkedNioStream
+import net.woggioni.rbcs.api.CacheValueMetadata
-import net.woggioni.rbcs.api.Cache
+import net.woggioni.rbcs.api.message.CacheMessage
-import net.woggioni.rbcs.common.contextLogger
+import net.woggioni.rbcs.api.message.CacheMessage.CacheContent
-import net.woggioni.rbcs.server.debug
+import net.woggioni.rbcs.api.message.CacheMessage.CacheGetRequest
-import net.woggioni.rbcs.server.warn
+import net.woggioni.rbcs.api.message.CacheMessage.CachePutRequest
-import java.nio.channels.FileChannel
+import net.woggioni.rbcs.api.message.CacheMessage.CachePutResponse
+import net.woggioni.rbcs.api.message.CacheMessage.CacheValueFoundResponse
+import net.woggioni.rbcs.api.message.CacheMessage.CacheValueNotFoundResponse
+import net.woggioni.rbcs.api.message.CacheMessage.LastCacheContent
+import net.woggioni.rbcs.common.createLogger
+import net.woggioni.rbcs.common.debug
+import net.woggioni.rbcs.common.warn
 import java.nio.file.Path
+import java.util.Locale
 
-@ChannelHandler.Sharable
+class ServerHandler(private val serverPrefix: Path) :
-class ServerHandler(private val cache: Cache, private val serverPrefix: Path) :
+    ChannelDuplexHandler() {
-    SimpleChannelInboundHandler<FullHttpRequest>() {
 
-    private val log = contextLogger()
+    companion object {
+        private val log = createLogger<ServerHandler>()
+        val NAME = this::class.java.name
+    }
 
-    override fun channelRead0(ctx: ChannelHandlerContext, msg: FullHttpRequest) {
+    private var httpVersion = HttpVersion.HTTP_1_1
-        val keepAlive: Boolean = HttpUtil.isKeepAlive(msg)
+    private var keepAlive = true
+
+    private fun resetRequestMetadata() {
+        httpVersion = HttpVersion.HTTP_1_1
+        keepAlive = true
+    }
+
+    private fun setRequestMetadata(req: HttpRequest) {
+        httpVersion = req.protocolVersion()
+        keepAlive = HttpUtil.isKeepAlive(req)
+    }
+
+    private fun setKeepAliveHeader(headers: HttpHeaders) {
+        if (!keepAlive) {
+            headers.set(HttpHeaderNames.CONNECTION, HttpHeaderValues.CLOSE)
+        } else {
+            headers.set(HttpHeaderNames.CONNECTION, HttpHeaderValues.KEEP_ALIVE)
+        }
+    }
+
+
+    override fun channelRead(ctx: ChannelHandlerContext, msg: Any) {
+        when (msg) {
+            is HttpRequest -> handleRequest(ctx, msg)
+            else -> super.channelRead(ctx, msg)
+        }
+    }
+
+
+    override fun write(ctx: ChannelHandlerContext, msg: Any, promise: ChannelPromise?) {
+        if (msg is CacheMessage) {
+            try {
+                when (msg) {
+                    is CachePutResponse -> {
+                        val response = DefaultFullHttpResponse(httpVersion, HttpResponseStatus.CREATED)
+                        val keyBytes = msg.key.toByteArray(Charsets.UTF_8)
+                        response.headers().apply {
+                            set(HttpHeaderNames.CONTENT_TYPE, HttpHeaderValues.TEXT_PLAIN)
+                            set(HttpHeaderNames.TRANSFER_ENCODING, HttpHeaderValues.CHUNKED)
+                        }
+                        setKeepAliveHeader(response.headers())
+                        ctx.write(response)
+                        val buf = ctx.alloc().buffer(keyBytes.size).apply {
+                            writeBytes(keyBytes)
+                        }
+                        ctx.writeAndFlush(DefaultLastHttpContent(buf))
+                    }
+
+                    is CacheValueNotFoundResponse -> {
+                        val response = DefaultFullHttpResponse(httpVersion, HttpResponseStatus.NOT_FOUND)
+                        response.headers()[HttpHeaderNames.CONTENT_LENGTH] = 0
+                        setKeepAliveHeader(response.headers())
+                        ctx.writeAndFlush(response)
+                    }
+
+                    is CacheValueFoundResponse -> {
+                        val response = DefaultHttpResponse(httpVersion, HttpResponseStatus.OK)
+                        response.headers().apply {
+                            set(HttpHeaderNames.CONTENT_TYPE, msg.metadata.mimeType ?: HttpHeaderValues.APPLICATION_OCTET_STREAM)
+                            msg.metadata.contentDisposition?.let { contentDisposition ->
+                                set(HttpHeaderNames.CONTENT_DISPOSITION, contentDisposition)
+                            }
+                        }
+                        setKeepAliveHeader(response.headers())
+                        response.headers().set(HttpHeaderNames.TRANSFER_ENCODING, HttpHeaderValues.CHUNKED)
+                        ctx.writeAndFlush(response)
+                    }
+
+                    is LastCacheContent -> {
+                        ctx.writeAndFlush(DefaultLastHttpContent(msg.content()))
+                    }
+
+                    is CacheContent -> {
+                        ctx.writeAndFlush(DefaultHttpContent(msg.content()))
+                    }
+
+                    else -> throw UnsupportedOperationException("This should never happen")
+                }.let { channelFuture ->
+                    if (promise != null) {
+                        channelFuture.addListener {
+                            if (it.isSuccess) promise.setSuccess()
+                            else promise.setFailure(it.cause())
+                        }
+                    }
+                }
+            } finally {
+                resetRequestMetadata()
+            }
+        } else super.write(ctx, msg, promise)
+    }
+
+
+    private fun handleRequest(ctx: ChannelHandlerContext, msg: HttpRequest) {
+        setRequestMetadata(msg)
         val method = msg.method()
         if (method === HttpMethod.GET) {
             val path = Path.of(msg.uri())
             val prefix = path.parent
-            val key = path.fileName?.toString() ?: let {
-                val response = DefaultFullHttpResponse(msg.protocolVersion(), HttpResponseStatus.NOT_FOUND)
-                response.headers()[HttpHeaderNames.CONTENT_LENGTH] = 0
-                ctx.writeAndFlush(response)
-                return
-            }
             if (serverPrefix == prefix) {
-                cache.get(key).thenApply { channel ->
+                ctx.pipeline().addAfter(NAME, CacheContentHandler.NAME, CacheContentHandler)
-                    if(channel != null) {
+                path.fileName?.toString()
-                        log.debug(ctx) {
+                    ?.let(::CacheGetRequest)
-                            "Cache hit for key '$key'"
+                    ?.let(ctx::fireChannelRead)
-                        }
+                    ?: ctx.channel().write(CacheValueNotFoundResponse())
-                        val response = DefaultHttpResponse(msg.protocolVersion(), HttpResponseStatus.OK)
-                        response.headers()[HttpHeaderNames.CONTENT_TYPE] = HttpHeaderValues.APPLICATION_OCTET_STREAM
-                        if (!keepAlive) {
-                            response.headers().set(HttpHeaderNames.CONNECTION, HttpHeaderValues.CLOSE)
-                            response.headers().set(HttpHeaderNames.TRANSFER_ENCODING, HttpHeaderValues.IDENTITY)
-                        } else {
-                            response.headers().set(HttpHeaderNames.CONNECTION, HttpHeaderValues.KEEP_ALIVE)
-                            response.headers().set(HttpHeaderNames.TRANSFER_ENCODING, HttpHeaderValues.CHUNKED)
-                        }
-                        ctx.write(response)
-                        when (channel) {
-                            is FileChannel -> {
-                                val content = DefaultFileRegion(channel, 0, channel.size())
-                                if (keepAlive) {
-                                    ctx.write(content)
-                                    ctx.writeAndFlush(LastHttpContent.EMPTY_LAST_CONTENT.retainedDuplicate())
-                                } else {
-                                    ctx.writeAndFlush(content)
-                                        .addListener(ChannelFutureListener.CLOSE)
-                                }
-                            }
-                            else -> {
-                                val content = ChunkedNioStream(channel)
-                                if (keepAlive) {
-                                    ctx.write(content).addListener {
-                                        content.close()
-                                    }
-                                    ctx.writeAndFlush(LastHttpContent.EMPTY_LAST_CONTENT.retainedDuplicate())
-                                } else {
-                                    ctx.writeAndFlush(content)
-                                        .addListener(ChannelFutureListener.CLOSE)
-                                }
-                            }
-                        }
-                    } else {
-                        log.debug(ctx) {
-                            "Cache miss for key '$key'"
-                        }
-                        val response = DefaultFullHttpResponse(msg.protocolVersion(), HttpResponseStatus.NOT_FOUND)
-                        response.headers()[HttpHeaderNames.CONTENT_LENGTH] = 0
-                        ctx.writeAndFlush(response)
-                    }
-                }.whenComplete { _, ex -> ex?.let(ctx::fireExceptionCaught) }
             } else {
                 log.warn(ctx) {
                     "Got request for unhandled path '${msg.uri()}'"
@@ -107,16 +160,14 @@ class ServerHandler(private val cache: Cache, private val serverPrefix: Path) :
                 log.debug(ctx) {
                     "Added value for key '$key' to build cache"
                 }
-                cache.put(key, msg.content()).thenRun {
+                ctx.pipeline().addAfter(NAME, CacheContentHandler.NAME, CacheContentHandler)
-                    val response = DefaultFullHttpResponse(
+                path.fileName?.toString()
-                        msg.protocolVersion(), HttpResponseStatus.CREATED,
+                    ?.let {
-                        Unpooled.copiedBuffer(key.toByteArray())
+                        val mimeType = HttpUtil.getMimeType(msg)?.toString()
-                    )
+                        CachePutRequest(key, CacheValueMetadata(msg.headers().get(HttpHeaderNames.CONTENT_DISPOSITION), mimeType))
-                    response.headers()[HttpHeaderNames.CONTENT_LENGTH] = response.content().readableBytes()
+                    }
-                    ctx.writeAndFlush(response)
+                    ?.let(ctx::fireChannelRead)
-                }.whenComplete { _, ex ->
+                    ?: ctx.channel().write(CacheValueNotFoundResponse())
-                    ctx.fireExceptionCaught(ex)
-                }
             } else {
                 log.warn(ctx) {
                     "Got request for unhandled path '${msg.uri()}'"
@@ -125,30 +176,8 @@ class ServerHandler(private val cache: Cache, private val serverPrefix: Path) :
                 response.headers()[HttpHeaderNames.CONTENT_LENGTH] = "0"
                 ctx.writeAndFlush(response)
             }
-        } else if(method == HttpMethod.TRACE) {
+        } else if (method == HttpMethod.TRACE) {
-            val replayedRequestHead = ctx.alloc().buffer()
+            super.channelRead(ctx, msg)
-            replayedRequestHead.writeCharSequence("TRACE ${Path.of(msg.uri())} ${msg.protocolVersion().text()}\r\n", Charsets.US_ASCII)
-            msg.headers().forEach { (key, value) ->
-                replayedRequestHead.apply {
-                    writeCharSequence(key, Charsets.US_ASCII)
-                    writeCharSequence(": ", Charsets.US_ASCII)
-                    writeCharSequence(value, Charsets.UTF_8)
-                    writeCharSequence("\r\n", Charsets.US_ASCII)
-                }
-            }
-            replayedRequestHead.writeCharSequence("\r\n", Charsets.US_ASCII)
-            val requestBody = msg.content()
-            requestBody.retain()
-            val responseBody = ctx.alloc().compositeBuffer(2).apply {
-                addComponents(true, replayedRequestHead)
-                addComponents(true, requestBody)
-            }
-            val response = DefaultFullHttpResponse(msg.protocolVersion(), HttpResponseStatus.OK, responseBody)
-            response.headers().apply {
-                set(HttpHeaderNames.CONTENT_TYPE, "message/http")
-                set(HttpHeaderNames.CONTENT_LENGTH, responseBody.readableBytes())
-            }
-            ctx.writeAndFlush(response)
         } else {
             log.warn(ctx) {
                 "Got request with unhandled method '${msg.method().name()}'"
@@ -158,4 +187,44 @@ class ServerHandler(private val cache: Cache, private val serverPrefix: Path) :
             ctx.writeAndFlush(response)
         }
     }
+
+
+    data class ContentDisposition(val type: Type?, val fileName: String?) {
+        enum class Type {
+            attachment, `inline`;
+
+            companion object {
+                @JvmStatic
+                fun parse(maybeString: String?) = maybeString.let { s ->
+                    try {
+                        java.lang.Enum.valueOf(Type::class.java, s)
+                    } catch (ex: IllegalArgumentException) {
+                        null
+                    }
+                }
+            }
+        }
+
+        companion object {
+            @JvmStatic
+            fun parse(contentDisposition: String) : ContentDisposition {
+                val parts = contentDisposition.split(";").dropLastWhile { it.isEmpty() }.toTypedArray()
+                val dispositionType = parts[0].trim { it <= ' ' }.let(Type::parse)  // Get the type (e.g., attachment)
+
+                var filename: String? = null
+                for (i in 1..<parts.size) {
+                    val part = parts[i].trim { it <= ' ' }
+                    if (part.lowercase(Locale.getDefault()).startsWith("filename=")) {
+                        filename = part.substring("filename=".length).trim { it <= ' ' }.replace("\"", "")
+                        break
+                    }
+                }
+                return ContentDisposition(dispositionType, filename)
+            }
+        }
+    }
+
+    override fun exceptionCaught(ctx: ChannelHandlerContext, cause: Throwable) {
+        super.exceptionCaught(ctx, cause)
+    }
 }

rbcs-server/src/main/kotlin/net/woggioni/rbcs/server/handler/TraceHandler.kt

@@ -0,0 +1,54 @@
+package net.woggioni.rbcs.server.handler
+
+import io.netty.channel.ChannelHandler.Sharable
+import io.netty.channel.ChannelHandlerContext
+import io.netty.channel.ChannelInboundHandlerAdapter
+import io.netty.handler.codec.http.DefaultHttpResponse
+import io.netty.handler.codec.http.HttpContent
+import io.netty.handler.codec.http.HttpHeaderNames
+import io.netty.handler.codec.http.HttpHeaderValues
+import io.netty.handler.codec.http.HttpRequest
+import io.netty.handler.codec.http.HttpResponseStatus
+import io.netty.handler.codec.http.LastHttpContent
+import java.nio.file.Path
+
+@Sharable
+object TraceHandler : ChannelInboundHandlerAdapter() {
+    val NAME = this::class.java.name
+    override fun channelRead(ctx: ChannelHandlerContext, msg: Any) {
+        when(msg) {
+            is HttpRequest -> {
+                val response = DefaultHttpResponse(msg.protocolVersion(), HttpResponseStatus.OK)
+                response.headers().apply {
+                    set(HttpHeaderNames.CONTENT_TYPE, "message/http")
+                    set(HttpHeaderNames.TRANSFER_ENCODING, HttpHeaderValues.CHUNKED)
+                }
+                ctx.write(response)
+                val replayedRequestHead = ctx.alloc().buffer()
+                replayedRequestHead.writeCharSequence(
+                    "TRACE ${Path.of(msg.uri())} ${msg.protocolVersion().text()}\r\n",
+                    Charsets.US_ASCII
+                )
+                msg.headers().forEach { (key, value) ->
+                    replayedRequestHead.apply {
+                        writeCharSequence(key, Charsets.US_ASCII)
+                        writeCharSequence(": ", Charsets.US_ASCII)
+                        writeCharSequence(value, Charsets.UTF_8)
+                        writeCharSequence("\r\n", Charsets.US_ASCII)
+                    }
+                }
+                replayedRequestHead.writeCharSequence("\r\n", Charsets.US_ASCII)
+                ctx.writeAndFlush(replayedRequestHead)
+            }
+            is LastHttpContent -> {
+                ctx.writeAndFlush(msg)
+            }
+            is HttpContent -> ctx.writeAndFlush(msg)
+            else -> super.channelRead(ctx, msg)
+        }
+    }
+
+    override fun exceptionCaught(ctx: ChannelHandlerContext?, cause: Throwable?) {
+        super.exceptionCaught(ctx, cause)
+    }
+}

rbcs-server/src/main/kotlin/net/woggioni/rbcs/server/throttling/BucketManager.kt

@@ -1,7 +1,7 @@
 package net.woggioni.rbcs.server.throttling
 
-import net.woggioni.rbcs.api.Configuration
 import net.woggioni.jwo.Bucket
+import net.woggioni.rbcs.api.Configuration
 import java.net.InetSocketAddress
 import java.util.Arrays
 import java.util.concurrent.ConcurrentHashMap

rbcs-server/src/main/kotlin/net/woggioni/rbcs/server/throttling/ThrottlingHandler.kt

@@ -1,31 +1,32 @@
 package net.woggioni.rbcs.server.throttling
 
-import io.netty.channel.ChannelHandler.Sharable
 import io.netty.channel.ChannelHandlerContext
 import io.netty.channel.ChannelInboundHandlerAdapter
 import io.netty.handler.codec.http.DefaultFullHttpResponse
+import io.netty.handler.codec.http.HttpContent
 import io.netty.handler.codec.http.HttpHeaderNames
+import io.netty.handler.codec.http.HttpRequest
 import io.netty.handler.codec.http.HttpResponseStatus
 import io.netty.handler.codec.http.HttpVersion
-import net.woggioni.rbcs.api.Configuration
-import net.woggioni.rbcs.common.contextLogger
-import net.woggioni.rbcs.server.RemoteBuildCacheServer
 import net.woggioni.jwo.Bucket
 import net.woggioni.jwo.LongMath
+import net.woggioni.rbcs.api.Configuration
+import net.woggioni.rbcs.common.createLogger
+import net.woggioni.rbcs.server.RemoteBuildCacheServer
 import java.net.InetSocketAddress
 import java.time.Duration
 import java.time.temporal.ChronoUnit
 import java.util.concurrent.TimeUnit
 
 
-@Sharable
+class ThrottlingHandler(private val bucketManager : BucketManager,
-class ThrottlingHandler(cfg: Configuration) :
+                        private val connectionConfiguration : Configuration.Connection) : ChannelInboundHandlerAdapter() {
-    ChannelInboundHandlerAdapter() {
 
-    private val log = contextLogger()
+    private companion object {
-    private val bucketManager = BucketManager.from(cfg)
+        private val log = createLogger<ThrottlingHandler>()
+    }
 
-    private val connectionConfiguration = cfg.connection
+    private var queuedContent : MutableList<HttpContent>? = null
 
     /**
      * If the suggested waiting time from the bucket is lower than this
@@ -38,29 +39,38 @@ class ThrottlingHandler(cfg: Configuration) :
         connectionConfiguration.writeIdleTimeout
     ).dividedBy(2)
 
+
+
     override fun channelRead(ctx: ChannelHandlerContext, msg: Any) {
-        val buckets = mutableListOf<Bucket>()
+        if(msg is HttpRequest) {
-        val user = ctx.channel().attr(RemoteBuildCacheServer.userAttribute).get()
+            val buckets = mutableListOf<Bucket>()
-        if (user != null) {
+            val user = ctx.channel().attr(RemoteBuildCacheServer.userAttribute).get()
-            bucketManager.getBucketByUser(user)?.let(buckets::addAll)
+            if (user != null) {
-        }
+                bucketManager.getBucketByUser(user)?.let(buckets::addAll)
-        val groups = ctx.channel().attr(RemoteBuildCacheServer.groupAttribute).get() ?: emptySet()
-        if (groups.isNotEmpty()) {
-            groups.forEach { group ->
-                bucketManager.getBucketByGroup(group)?.let(buckets::add)
             }
-        }
+            val groups = ctx.channel().attr(RemoteBuildCacheServer.groupAttribute).get() ?: emptySet()
-        if (user == null && groups.isEmpty()) {
+            if (groups.isNotEmpty()) {
-            bucketManager.getBucketByAddress(ctx.channel().remoteAddress() as InetSocketAddress)?.let(buckets::add)
+                groups.forEach { group ->
-        }
+                    bucketManager.getBucketByGroup(group)?.let(buckets::add)
-        if (buckets.isEmpty()) {
+                }
-            return super.channelRead(ctx, msg)
+            }
+            if (user == null && groups.isEmpty()) {
+                bucketManager.getBucketByAddress(ctx.channel().remoteAddress() as InetSocketAddress)?.let(buckets::add)
+            }
+            if (buckets.isEmpty()) {
+                super.channelRead(ctx, msg)
+            } else {
+                handleBuckets(buckets, ctx, msg, true)
+            }
+            ctx.channel().id()
+        } else if(msg is HttpContent) {
+            queuedContent?.add(msg) ?: super.channelRead(ctx, msg)
         } else {
-            handleBuckets(buckets, ctx, msg, true)
+            super.channelRead(ctx, msg)
         }
     }
 
-    private fun handleBuckets(buckets : List<Bucket>, ctx : ChannelHandlerContext, msg : Any, delayResponse : Boolean) {
+    private fun handleBuckets(buckets: List<Bucket>, ctx: ChannelHandlerContext, msg: Any, delayResponse: Boolean) {
         var nextAttempt = -1L
         for (bucket in buckets) {
             val bucketNextAttempt = bucket.removeTokensWithEstimate(1)
@@ -68,17 +78,25 @@ class ThrottlingHandler(cfg: Configuration) :
                 nextAttempt = bucketNextAttempt
             }
         }
-        if(nextAttempt < 0) {
+        if (nextAttempt < 0) {
             super.channelRead(ctx, msg)
-            return
+            queuedContent?.let {
-        }
+                for(content in it) {
-        val waitDuration = Duration.of(LongMath.ceilDiv(nextAttempt, 100_000_000L) * 100L, ChronoUnit.MILLIS)
+                    super.channelRead(ctx, content)
-        if (delayResponse && waitDuration < waitThreshold) {
+                }
-            ctx.executor().schedule({
+                queuedContent = null
-                handleBuckets(buckets, ctx, msg, false)
+            }
-            }, waitDuration.toMillis(), TimeUnit.MILLISECONDS)
         } else {
-            sendThrottledResponse(ctx, waitDuration)
+            val waitDuration = Duration.of(LongMath.ceilDiv(nextAttempt, 100_000_000L) * 100L, ChronoUnit.MILLIS)
+            if (delayResponse && waitDuration < waitThreshold) {
+                this.queuedContent = mutableListOf()
+                ctx.executor().schedule({
+                    handleBuckets(buckets, ctx, msg, false)
+                }, waitDuration.toMillis(), TimeUnit.MILLISECONDS)
+            } else {
+                this.queuedContent = null
+                sendThrottledResponse(ctx, waitDuration)
+            }
         }
     }
 

rbcs-server/src/main/resources/net/woggioni/rbcs/server/schema/rbcs.xsd

@@ -39,7 +39,7 @@
         <xs:attribute name="idle-timeout" type="xs:duration" use="optional" default="PT30S"/>
         <xs:attribute name="read-idle-timeout" type="xs:duration" use="optional" default="PT60S"/>
         <xs:attribute name="write-idle-timeout" type="xs:duration" use="optional" default="PT60S"/>
-        <xs:attribute name="max-request-size" type="xs:unsignedInt" use="optional" default="67108864"/>
+        <xs:attribute name="max-request-size" type="rbcs:byteSizeType" use="optional" default="0x4000000"/>
     </xs:complexType>
 
     <xs:complexType name="eventExecutorType">
@@ -52,10 +52,11 @@
         <xs:complexContent>
             <xs:extension base="rbcs:cacheType">
                 <xs:attribute name="max-age" type="xs:duration" default="P1D"/>
-                <xs:attribute name="max-size" type="xs:token" default="0x1000000"/>
+                <xs:attribute name="max-size" type="rbcs:byteSizeType" default="0x1000000"/>
                 <xs:attribute name="digest" type="xs:token" default="MD5"/>
                 <xs:attribute name="enable-compression" type="xs:boolean" default="true"/>
-                <xs:attribute name="compression-level" type="xs:byte" default="-1"/>
+                <xs:attribute name="compression-level" type="rbcs:compressionLevelType" default="-1"/>
+                <xs:attribute name="chunk-size" type="rbcs:byteSizeType" default="0x10000"/>
             </xs:extension>
         </xs:complexContent>
     </xs:complexType>
@@ -63,11 +64,12 @@
     <xs:complexType name="fileSystemCacheType">
         <xs:complexContent>
             <xs:extension base="rbcs:cacheType">
-                <xs:attribute name="path" type="xs:string" use="required"/>
+                <xs:attribute name="path" type="xs:string" use="optional"/>
                 <xs:attribute name="max-age" type="xs:duration" default="P1D"/>
                 <xs:attribute name="digest" type="xs:token" default="MD5"/>
                 <xs:attribute name="enable-compression" type="xs:boolean" default="true"/>
-                <xs:attribute name="compression-level" type="xs:byte" default="-1"/>
+                <xs:attribute name="compression-level" type="rbcs:compressionLevelType" default="-1"/>
+                <xs:attribute name="chunk-size" type="rbcs:byteSizeType" default="0x10000"/>
             </xs:extension>
         </xs:complexContent>
     </xs:complexType>
@@ -220,5 +222,17 @@
         <xs:attribute name="port" type="xs:unsignedShort" use="required"/>
     </xs:complexType>
 
+    <xs:simpleType name="byteSizeType">
+        <xs:restriction base="xs:token">
+            <xs:pattern value="(0x[a-f0-9]+|[0-9]+)"/>
+        </xs:restriction>
+    </xs:simpleType>
+
+    <xs:simpleType name="compressionLevelType">
+        <xs:restriction base="xs:integer">
+            <xs:minInclusive value="-1"/>
+            <xs:maxInclusive value="9"/>
+        </xs:restriction>
+    </xs:simpleType>
 
 </xs:schema>

rbcs-server/src/test/kotlin/net/woggioni/rbcs/server/test/AbstractBasicAuthServerTest.kt

@@ -47,11 +47,13 @@ abstract class AbstractBasicAuthServerTest : AbstractServerTest() {
             ),
             users.asSequence().map { it.name to it}.toMap(),
             sequenceOf(writersGroup, readersGroup).map { it.name to it}.toMap(),
-            FileSystemCacheConfiguration(this.cacheDir,
+            FileSystemCacheConfiguration(
+                this.cacheDir,
                 maxAge = Duration.ofSeconds(3600 * 24),
                 digestAlgorithm = "MD5",
                 compressionLevel = Deflater.DEFAULT_COMPRESSION,
-                compressionEnabled = false
+                compressionEnabled = false,
+                chunkSize = 0x1000
             ),
             Configuration.BasicAuthentication(),
             null,

rbcs-server/src/test/kotlin/net/woggioni/rbcs/server/test/AbstractServerTest.kt

@@ -43,8 +43,9 @@ abstract class AbstractServerTest {
     }
 
     private fun stopServer() {
-        this.serverHandle?.use {
+        this.serverHandle?.let {
-            it.shutdown()
+            it.sendShutdownSignal()
+            it.get()
         }
     }
 }

rbcs-server/src/test/kotlin/net/woggioni/rbcs/server/test/AbstractTlsServerTest.kt

@@ -154,9 +154,10 @@ abstract class AbstractTlsServerTest : AbstractServerTest() {
             sequenceOf(writersGroup, readersGroup).map { it.name to it }.toMap(),
             FileSystemCacheConfiguration(this.cacheDir,
                 maxAge = Duration.ofSeconds(3600 * 24),
-                compressionEnabled = true,
+                compressionEnabled = false,
                 compressionLevel = Deflater.DEFAULT_COMPRESSION,
-                digestAlgorithm = "MD5"
+                digestAlgorithm = "MD5",
+                chunkSize = 0x1000
             ),
 //            InMemoryCacheConfiguration(
 //                maxAge = Duration.ofSeconds(3600 * 24),

rbcs-server/src/test/kotlin/net/woggioni/rbcs/server/test/BasicAuthServerTest.kt

@@ -86,7 +86,7 @@ class BasicAuthServerTest : AbstractBasicAuthServerTest() {
     @Test
     @Order(4)
     fun putAsAWriterUser() {
-        val client: HttpClient = HttpClient.newHttpClient()
+        val client: HttpClient = HttpClient.newBuilder().version(HttpClient.Version.HTTP_1_1).build()
 
         val (key, value) = keyValuePair
         val user = cfg.users.values.find {

rbcs-server/src/test/kotlin/net/woggioni/rbcs/server/test/NoAuthServerTest.kt

@@ -52,7 +52,8 @@ class NoAuthServerTest : AbstractServerTest() {
                 compressionEnabled = true,
                 digestAlgorithm = "MD5",
                 compressionLevel = Deflater.DEFAULT_COMPRESSION,
-                maxSize = 0x1000000
+                maxSize = 0x1000000,
+                chunkSize = 0x1000
             ),
             null,
             null,
@@ -80,7 +81,7 @@ class NoAuthServerTest : AbstractServerTest() {
     @Test
     @Order(1)
     fun putWithNoAuthorizationHeader() {
-        val client: HttpClient = HttpClient.newHttpClient()
+        val client: HttpClient = HttpClient.newBuilder().version(HttpClient.Version.HTTP_1_1).build()
         val (key, value) = keyValuePair
 
         val requestBuilder = newRequestBuilder(key)

rbcs-server/src/test/resources/net/woggioni/rbcs/server/test/valid/rbcs-default.xml

@@ -11,7 +11,7 @@
             idle-timeout="PT30M"
             max-request-size="101325"/>
     <event-executor use-virtual-threads="false"/>
-    <cache xs:type="rbcs:fileSystemCacheType" path="/tmp/rbcs" max-age="P7D"/>
+    <cache xs:type="rbcs:fileSystemCacheType" path="/tmp/rbcs" max-age="P7D" chunk-size="0xa910"/>
     <authentication>
         <none/>
     </authentication>

rbcs-server/src/test/resources/net/woggioni/rbcs/server/test/valid/rbcs-memcached-tls.xml

@@ -13,7 +13,7 @@
             read-timeout="PT5M"
             write-timeout="PT5M"/>
     <event-executor use-virtual-threads="true"/>
-    <cache xs:type="rbcs-memcache:memcacheCacheType" max-age="P7D" max-size="16777216" compression-mode="deflate">
+    <cache xs:type="rbcs-memcache:memcacheCacheType" max-age="P7D" chunk-size="123">
         <server host="memcached" port="11211"/>
     </cache>
     <authorization>

rbcs-server/src/test/resources/net/woggioni/rbcs/server/test/valid/rbcs-memcached.xml

@@ -12,7 +12,7 @@
             idle-timeout="PT30M"
             max-request-size="101325"/>
     <event-executor use-virtual-threads="false"/>
-    <cache xs:type="rbcs-memcache:memcacheCacheType" max-age="P7D" max-size="101325" digest="SHA-256">
+    <cache xs:type="rbcs-memcache:memcacheCacheType" max-age="P7D" digest="SHA-256" chunk-size="456" compression-mode="deflate" compression-level="7">
         <server host="127.0.0.1" port="11211" max-connections="10" connection-timeout="PT20S"/>
     </cache>
     <authentication>

rbcs-server/src/test/resources/net/woggioni/rbcs/server/test/valid/rbcs-tls.xml

@@ -11,7 +11,7 @@
             idle-timeout="PT30M"
             max-request-size="4096"/>
     <event-executor use-virtual-threads="false"/>
-    <cache xs:type="rbcs:inMemoryCacheType" max-age="P7D"/>
+    <cache xs:type="rbcs:inMemoryCacheType" max-age="P7D" chunk-size="0xa91f"/>
     <authorization>
         <users>
             <user name="user1" password="password1">

rbcs-servlet/Dockerfile

@@ -0,0 +1,3 @@
+FROM tomcat:jdk21
+
+COPY ./rbcs-servlet-*.war /usr/local/tomcat/webapps/rbcs-servlet.war

rbcs-servlet/README.md

@@ -0,0 +1,28 @@
+## How to run
+
+```bash
+gradlew dockerBuildImage
+```
+ then in this directory run
+```bash
+docker run --rm -p 127.0.0.1:8080:8080 -m 1G --name tomcat -v $(pwd)/conf/server.xml:/usr/local/tomcat/conf/server.xml gitea.woggioni.net/woggioni/rbcs/servlet:latest
+```
+
+you can call the servlet cache with this RBCS client profile
+```xml
+    <profile name="servlet" base-url="http://127.0.0.1:8080/rbcs-servlet/cache/" max-connections="100" enable-compression="false">
+    	<no-auth/>
+    	<connection
+	        idle-timeout="PT5S"
+	        read-idle-timeout="PT10S"
+	        write-idle-timeout="PT10S"
+	        read-timeout="PT5S"
+	        write-timeout="PT5S"/>
+        <retry-policy max-attempts="10" initial-delay="PT1S" exp="1.2"/>
+    </profile>
+```
+
+## Notes
+
+The servlet implementation has an in memory cache whose maximum
+size is hardcoded to 0x8000000 bytes (around 134 MB)

rbcs-servlet/build.gradle

@@ -0,0 +1,33 @@
+plugins {
+    alias(catalog.plugins.kotlin.jvm)
+    alias(catalog.plugins.gradle.docker)
+    id 'war'
+}
+
+import com.bmuschko.gradle.docker.tasks.image.DockerBuildImage
+
+dependencies {
+    compileOnly catalog.jakarta.servlet.api
+    compileOnly catalog.jakarta.enterprise.cdi.api
+
+    implementation catalog.jwo
+    implementation catalog.jakarta.el
+    implementation catalog.jakarta.cdi.el.api
+    implementation catalog.weld.servlet.core
+    implementation catalog.weld.web
+}
+
+Provider<Copy> prepareDockerBuild = tasks.register('prepareDockerBuild', Copy) {
+    group = 'docker'
+    into project.layout.buildDirectory.file('docker')
+    from(tasks.war)
+    from(file('Dockerfile'))
+}
+
+Provider<DockerBuildImage> dockerBuild = tasks.register('dockerBuildImage', DockerBuildImage) {
+    group = 'docker'
+    dependsOn(prepareDockerBuild)
+    images.add('gitea.woggioni.net/woggioni/rbcs/servlet:latest')
+    images.add("gitea.woggioni.net/woggioni/rbcs/servlet:${version}")
+}
+

rbcs-servlet/conf/server.xml

@@ -0,0 +1,140 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!-- Note:  A "Server" is not itself a "Container", so you may not
+     define subcomponents such as "Valves" at this level.
+     Documentation at /docs/config/server.html
+ -->
+<Server port="8005" shutdown="SHUTDOWN">
+    <Listener className="org.apache.catalina.startup.VersionLoggerListener" />
+    <!-- Security listener. Documentation at /docs/config/listeners.html
+    <Listener className="org.apache.catalina.security.SecurityListener" />
+    -->
+    <!-- OpenSSL support using Tomcat Native -->
+    <Listener className="org.apache.catalina.core.AprLifecycleListener" />
+    <!-- OpenSSL support using FFM API from Java 22 -->
+    <!-- <Listener className="org.apache.catalina.core.OpenSSLLifecycleListener" /> -->
+    <!-- Prevent memory leaks due to use of particular java/javax APIs-->
+    <Listener className="org.apache.catalina.core.JreMemoryLeakPreventionListener" />
+    <Listener className="org.apache.catalina.mbeans.GlobalResourcesLifecycleListener" />
+    <Listener className="org.apache.catalina.core.ThreadLocalLeakPreventionListener" />
+
+    <!-- Global JNDI resources
+         Documentation at /docs/jndi-resources-howto.html
+    -->
+    <GlobalNamingResources>
+        <!-- Editable user database that can also be used by
+             UserDatabaseRealm to authenticate users
+        -->
+        <Resource name="UserDatabase" auth="Container"
+                  type="org.apache.catalina.UserDatabase"
+                  description="User database that can be updated and saved"
+                  factory="org.apache.catalina.users.MemoryUserDatabaseFactory"
+                  pathname="conf/tomcat-users.xml" />
+    </GlobalNamingResources>
+
+    <!-- A "Service" is a collection of one or more "Connectors" that share
+         a single "Container" Note:  A "Service" is not itself a "Container",
+         so you may not define subcomponents such as "Valves" at this level.
+         Documentation at /docs/config/service.html
+     -->
+    <Service name="Catalina">
+
+        <!--The connectors can use a shared executor, you can define one or more named thread pools-->
+<!--        <Executor name="tomcatThreadPool" namePrefix="catalina-exec-" maxThreads="150" minSpareThreads="4"/>-->
+        <Executor name="tomcatThreadPool" namePrefix="virtual-exec-" className="org.apache.catalina.core.StandardVirtualThreadExecutor"/>
+
+
+
+        <!-- A "Connector" represents an endpoint by which requests are received
+             and responses are returned. Documentation at :
+             HTTP Connector: /docs/config/http.html
+             AJP  Connector: /docs/config/ajp.html
+             Define a non-SSL/TLS HTTP/1.1 Connector on port 8080
+        -->
+<!--        <Connector port="8080" protocol="HTTP/1.1" executor="tomcatThreadPool"-->
+<!--                   connectionTimeout="20000"-->
+<!--                   redirectPort="8443" />-->
+        <Connector port="8080" protocol="HTTP/1.1"
+                   connectionTimeout="20000"
+                   redirectPort="8443" />
+        <!-- A "Connector" using the shared thread pool-->
+        <!--
+        <Connector executor="tomcatThreadPool"
+                   port="8080" protocol="HTTP/1.1"
+                   connectionTimeout="20000"
+                   redirectPort="8443" />
+        -->
+        <!-- Define an SSL/TLS HTTP/1.1 Connector on port 8443 with HTTP/2
+             This connector uses the NIO implementation. The default
+             SSLImplementation will depend on the presence of the APR/native
+             library and the useOpenSSL attribute of the AprLifecycleListener.
+             Either JSSE or OpenSSL style configuration may be used regardless of
+             the SSLImplementation selected. JSSE style configuration is used below.
+        -->
+        <!--
+        <Connector port="8443" protocol="org.apache.coyote.http11.Http11NioProtocol"
+                   maxThreads="150" SSLEnabled="true">
+            <UpgradeProtocol className="org.apache.coyote.http2.Http2Protocol" />
+            <SSLHostConfig>
+                <Certificate certificateKeystoreFile="conf/localhost-rsa.jks"
+                             certificateKeystorePassword="changeit" type="RSA" />
+            </SSLHostConfig>
+        </Connector>
+        -->
+
+        <!-- Define an AJP 1.3 Connector on port 8009 -->
+        <!--
+        <Connector protocol="AJP/1.3"
+                   address="::1"
+                   port="8009"
+                   redirectPort="8443" />
+        -->
+
+        <!-- An Engine represents the entry point (within Catalina) that processes
+             every request.  The Engine implementation for Tomcat stand alone
+             analyzes the HTTP headers included with the request, and passes them
+             on to the appropriate Host (virtual host).
+             Documentation at /docs/config/engine.html -->
+
+        <!-- You should set jvmRoute to support load-balancing via AJP ie :
+        <Engine name="Catalina" defaultHost="localhost" jvmRoute="jvm1">
+        -->
+        <Engine name="Catalina" defaultHost="localhost">
+
+            <!--For clustering, please take a look at documentation at:
+                /docs/cluster-howto.html  (simple how to)
+                /docs/config/cluster.html (reference documentation) -->
+            <!--
+            <Cluster className="org.apache.catalina.ha.tcp.SimpleTcpCluster"/>
+            -->
+
+            <!-- Use the LockOutRealm to prevent attempts to guess user passwords
+                 via a brute-force attack -->
+            <Realm className="org.apache.catalina.realm.LockOutRealm">
+                <!-- This Realm uses the UserDatabase configured in the global JNDI
+                     resources under the key "UserDatabase".  Any edits
+                     that are performed against this UserDatabase are immediately
+                     available for use by the Realm.  -->
+                <Realm className="org.apache.catalina.realm.UserDatabaseRealm"
+                       resourceName="UserDatabase"/>
+            </Realm>
+
+            <Host name="localhost"  appBase="webapps"
+                  unpackWARs="true" autoDeploy="true">
+
+                <!-- SingleSignOn valve, share authentication between web applications
+                     Documentation at: /docs/config/valve.html -->
+                <!--
+                <Valve className="org.apache.catalina.authenticator.SingleSignOn" />
+                -->
+
+                <!-- Access log processes all example.
+                     Documentation at: /docs/config/valve.html
+                     Note: The pattern used is equivalent to using pattern="common" -->
+                <Valve className="org.apache.catalina.valves.AccessLogValve" directory="logs"
+                       prefix="localhost_access_log" suffix=".txt"
+                       pattern="%h %l %u %t &quot;%r&quot; %s %b" />
+
+            </Host>
+        </Engine>
+    </Service>
+</Server>

rbcs-servlet/conf/tomcat-users.xml

@@ -0,0 +1,58 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+  Licensed to the Apache Software Foundation (ASF) under one or more
+  contributor license agreements.  See the NOTICE file distributed with
+  this work for additional information regarding copyright ownership.
+  The ASF licenses this file to You under the Apache License, Version 2.0
+  (the "License"); you may not use this file except in compliance with
+  the License.  You may obtain a copy of the License at
+
+      http://www.apache.org/licenses/LICENSE-2.0
+
+  Unless required by applicable law or agreed to in writing, software
+  distributed under the License is distributed on an "AS IS" BASIS,
+  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  See the License for the specific language governing permissions and
+  limitations under the License.
+-->
+<tomcat-users xmlns="http://tomcat.apache.org/xml"
+              xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+              xsi:schemaLocation="http://tomcat.apache.org/xml tomcat-users.xsd"
+              version="1.0">
+    <!--
+      By default, no user is included in the "manager-gui" role required
+      to operate the "/manager/html" web application.  If you wish to use this app,
+      you must define such a user - the username and password are arbitrary.
+
+      Built-in Tomcat manager roles:
+        - manager-gui    - allows access to the HTML GUI and the status pages
+        - manager-script - allows access to the HTTP API and the status pages
+        - manager-jmx    - allows access to the JMX proxy and the status pages
+        - manager-status - allows access to the status pages only
+
+      The users below are wrapped in a comment and are therefore ignored. If you
+      wish to configure one or more of these users for use with the manager web
+      application, do not forget to remove the <!.. ..> that surrounds them. You
+      will also need to set the passwords to something appropriate.
+    -->
+    <!--
+      <user username="admin" password="<must-be-changed>" roles="manager-gui"/>
+      <user username="robot" password="<must-be-changed>" roles="manager-script"/>
+    -->
+    <user username="luser" password="password" roles="manager-gui,admin-gui"/>
+
+    <!--
+      The sample user and role entries below are intended for use with the
+      examples web application. They are wrapped in a comment and thus are ignored
+      when reading this file. If you wish to configure these users for use with the
+      examples web application, do not forget to remove the <!.. ..> that surrounds
+      them. You will also need to set the passwords to something appropriate.
+    -->
+    <!--
+      <role rolename="tomcat"/>
+      <role rolename="role1"/>
+      <user username="tomcat" password="<must-be-changed>" roles="tomcat"/>
+      <user username="both" password="<must-be-changed>" roles="tomcat,role1"/>
+      <user username="role1" password="<must-be-changed>" roles="role1"/>
+    -->
+</tomcat-users>

rbcs-servlet/src/main/kotlin/net/woggioni/rbcs/servlet/CacheServlet.kt

@@ -0,0 +1,169 @@
+package net.woggioni.rbcs.servlet
+
+import jakarta.annotation.PreDestroy
+import jakarta.enterprise.context.ApplicationScoped
+import jakarta.inject.Inject
+import jakarta.servlet.annotation.WebServlet
+import jakarta.servlet.http.HttpServlet
+import jakarta.servlet.http.HttpServletRequest
+import jakarta.servlet.http.HttpServletResponse
+import net.woggioni.jwo.HttpClient.HttpStatus
+import net.woggioni.jwo.JWO
+import java.io.ByteArrayInputStream
+import java.io.ByteArrayOutputStream
+import java.nio.file.Path
+import java.time.Duration
+import java.time.Instant
+import java.util.concurrent.ConcurrentHashMap
+import java.util.concurrent.PriorityBlockingQueue
+import java.util.concurrent.TimeUnit
+import java.util.concurrent.atomic.AtomicLong
+import java.util.logging.Logger
+
+
+private class CacheKey(private val value: ByteArray) {
+    override fun equals(other: Any?) = if (other is CacheKey) {
+        value.contentEquals(other.value)
+    } else false
+
+    override fun hashCode() = value.contentHashCode()
+}
+
+
+@ApplicationScoped
+open class InMemoryServletCache : AutoCloseable {
+
+    private val maxAge= Duration.ofDays(7)
+    private val maxSize = 0x8000000
+
+    companion object {
+        @JvmStatic
+        private val log = Logger.getLogger(this::class.java.name)
+    }
+
+    private val size = AtomicLong()
+    private val map = ConcurrentHashMap<CacheKey, ByteArray>()
+
+    private class RemovalQueueElement(val key: CacheKey, val value: ByteArray, val expiry: Instant) :
+        Comparable<RemovalQueueElement> {
+        override fun compareTo(other: RemovalQueueElement) = expiry.compareTo(other.expiry)
+    }
+
+    private val removalQueue = PriorityBlockingQueue<RemovalQueueElement>()
+
+    @Volatile
+    private var running = false
+
+    private val garbageCollector = Thread.ofVirtual().name("in-memory-cache-gc").start {
+        while (running) {
+            val el = removalQueue.poll(1, TimeUnit.SECONDS) ?: continue
+            val value = el.value
+            val now = Instant.now()
+            if (now > el.expiry) {
+                val removed = map.remove(el.key, value)
+                if (removed) {
+                    updateSizeAfterRemoval(value)
+                }
+            } else {
+                removalQueue.put(el)
+                Thread.sleep(minOf(Duration.between(now, el.expiry), Duration.ofSeconds(1)))
+            }
+        }
+    }
+
+    private fun removeEldest(): Long {
+        while (true) {
+            val el = removalQueue.take()
+            val value = el.value
+            val removed = map.remove(el.key, value)
+            if (removed) {
+                val newSize = updateSizeAfterRemoval(value)
+                return newSize
+            }
+        }
+    }
+
+    private fun updateSizeAfterRemoval(removed: ByteArray): Long {
+        return size.updateAndGet { currentSize: Long ->
+            currentSize - removed.size
+        }
+    }
+
+    @PreDestroy
+    override fun close() {
+        running = false
+        garbageCollector.join()
+    }
+
+    open fun get(key: ByteArray) = map[CacheKey(key)]
+
+    open fun put(
+        key: ByteArray,
+        value: ByteArray,
+    ) {
+        val cacheKey = CacheKey(key)
+        val oldSize = map.put(cacheKey, value)?.let { old ->
+            val result = old.size
+            result
+        } ?: 0
+        val delta = value.size - oldSize
+        var newSize = size.updateAndGet { currentSize: Long ->
+            currentSize + delta
+        }
+        removalQueue.put(RemovalQueueElement(cacheKey, value, Instant.now().plus(maxAge)))
+        while (newSize > maxSize) {
+            newSize = removeEldest()
+        }
+    }
+}
+
+
+@WebServlet(urlPatterns = ["/cache/*"])
+class CacheServlet : HttpServlet() {
+    companion object {
+        @JvmStatic
+        private val log = Logger.getLogger(this::class.java.name)
+    }
+
+    @Inject
+    private lateinit var cache : InMemoryServletCache
+
+    private fun getKey(req : HttpServletRequest) : String {
+        return Path.of(req.pathInfo).fileName.toString()
+    }
+
+    override fun doPut(req: HttpServletRequest, resp: HttpServletResponse) {
+        val baos = ByteArrayOutputStream()
+        baos.use {
+            JWO.copy(req.inputStream, baos)
+        }
+        val key = getKey(req)
+        cache.put(key.toByteArray(Charsets.UTF_8), baos.toByteArray())
+        resp.status = 201
+        resp.setContentLength(0)
+        log.fine {
+            "[${Thread.currentThread().name}] Added value for key $key"
+        }
+    }
+
+    override fun doGet(req: HttpServletRequest, resp: HttpServletResponse) {
+        val key = getKey(req)
+        val value = cache.get(key.toByteArray(Charsets.UTF_8))
+        if (value == null) {
+            log.fine {
+                "[${Thread.currentThread().name}] Cache miss for key $key"
+            }
+            resp.status = HttpStatus.NOT_FOUND.code
+            resp.setContentLength(0)
+        } else {
+            log.fine {
+                "[${Thread.currentThread().name}] Cache hit for key $key"
+            }
+            resp.status = HttpStatus.OK.code
+            resp.setContentLength(value.size)
+            ByteArrayInputStream(value).use {
+                JWO.copy(it, resp.outputStream)
+            }
+        }
+    }
+}

rbcs-servlet/src/main/resources/META-INF/beans.xml

@@ -0,0 +1,5 @@
+<beans xmlns="https://jakarta.ee/xml/ns/jakartaee"
+       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+       xsi:schemaLocation="https://jakarta.ee/xml/ns/jakartaee https://jakarta.ee/xml/ns/jakartaee/beans_4_0.xsd"
+       version="4.0">
+</beans>

rbcs-servlet/src/main/resources/META-INF/context.xml

@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<Context antiJARLocking="true">
+    <Resource name="BeanManager"
+              auth="Container"
+              type="javax.enterprise.inject.spi.BeanManager"
+              factory="org.jboss.weld.resources.ManagerObjectFactory"/>
+</Context>

rbcs-servlet/src/main/resources/logging.properties

@@ -0,0 +1,8 @@
+handlers = java.util.logging.ConsoleHandler
+.level=INFO
+net.woggioni.rbcs.servlet.level=FINEST
+java.util.logging.ConsoleHandler.level=INFO
+java.util.logging.ConsoleHandler.formatter = java.util.logging.SimpleFormatter
+java.util.logging.SimpleFormatter.format   = %1$tF %1$tT [%4$s] %2$s %5$s %6$s%n
+org.apache.catalina.core.ContainerBase.[Catalina].level=ALL
+org.apache.catalina.core.ContainerBase.[Catalina].handlers=java.util.logging.ConsoleHandler

rbcs-servlet/src/main/webapp/WEB-INF/web.xml

@@ -0,0 +1,8 @@
+<web-app xmlns="https://jakarta.ee/xml/ns/jakartaee"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="https://jakarta.ee/xml/ns/jakartaee https://jakarta.ee/xml/ns/jakartaee/web-app_6_0.xsd"
+         version="6.0">
+    <listener>
+        <listener-class>org.jboss.weld.module.web.servlet.WeldTerminalListener</listener-class>
+    </listener>
+</web-app>

settings.gradle

@@ -29,6 +29,7 @@ include 'rbcs-api'
 include 'rbcs-common'
 include 'rbcs-server-memcache'
 include 'rbcs-cli'
-include 'docker'
 include 'rbcs-client'
 include 'rbcs-server'
+include 'rbcs-servlet'
+include 'docker'