refactor

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

@@ -0,0 +1,20 @@
+module net.woggioni.rbcs.server.otel {
+    requires net.woggioni.rbcs.common;
+    requires kotlin.stdlib;
+    requires io.netty.transport;
+    requires io.netty.common;
+    requires io.netty.buffer;
+    requires org.slf4j;
+
+    requires ch.qos.logback.core;
+    requires ch.qos.logback.classic;
+    requires io.opentelemetry.api;
+    requires io.opentelemetry.sdk.autoconfigure;
+    requires io.opentelemetry.instrumentation.runtime_telemetry;
+    requires io.opentelemetry.instrumentation.netty_4_1;
+    requires io.opentelemetry.instrumentation.logback_appender_1_0;
+    requires io.opentelemetry.extension.trace.propagation;
+    requires net.woggioni.rbcs.api;
+
+    provides net.woggioni.rbcs.api.TelemetryController with net.woggioni.rbcs.server.otel.OtelController;
+}

rbcs-server-otel/src/main/kotlin/net/woggioni/rbcs/server/otel/OtelController.kt

@@ -0,0 +1,53 @@
+package net.woggioni.rbcs.server.otel
+
+import io.netty.channel.ChannelHandler
+import io.opentelemetry.api.GlobalOpenTelemetry
+import io.opentelemetry.instrumentation.logback.appender.v1_0.OpenTelemetryAppender
+import io.opentelemetry.instrumentation.netty.v4_1.NettyServerTelemetry
+import io.opentelemetry.instrumentation.runtimetelemetry.RuntimeTelemetry
+import io.opentelemetry.sdk.autoconfigure.AutoConfiguredOpenTelemetrySdk
+import net.woggioni.rbcs.api.TelemetryController
+import net.woggioni.rbcs.common.createLogger
+import net.woggioni.rbcs.common.info
+
+class OtelController : TelemetryController {
+
+    private val log = createLogger<OtelController>()
+
+    private val appenderAvailable: Boolean by lazy {
+        runCatching {
+            Class.forName("io.opentelemetry.instrumentation.logback.appender.v1_0.OpenTelemetryAppender")
+        }.fold(
+            onSuccess = { true },
+            onFailure = {
+                log.info { "OpenTelemetry logback appender not on classpath" }
+                false
+            },
+        )
+    }
+
+    override fun initialize() {
+        log.info { "Initializing OpenTelemetry SDK with auto-configuration" }
+
+        val sdk = AutoConfiguredOpenTelemetrySdk.builder()
+            .setResultAsGlobal()
+            .build()
+            .openTelemetrySdk
+        RuntimeTelemetry.create(sdk)
+
+        if (appenderAvailable) {
+            runCatching {
+                OpenTelemetryAppender.install(sdk)
+                log.info { "OpenTelemetry logback appender installed" }
+            }.onFailure { ex ->
+                val msg = ex.localizedMessage ?: ex.javaClass.name
+                log.info { "Failed to install OpenTelemetry logback appender: $msg" }
+            }
+        }
+        log.info { "OpenTelemetry SDK initialized successfully" }
+    }
+
+    override fun createHandler(): ChannelHandler {
+        return NettyServerTelemetry.create(GlobalOpenTelemetry.get()).createCombinedHandler()
+    }
+}