1 files changed, 48 insertions, 0 deletions
diff --git a/kamon-core/src/main/scala/kamon/instrumentation/scala/FutureInstrumentation.scala b/kamon-core/src/main/scala/kamon/instrumentation/scala/FutureInstrumentation.scala
new file mode 100644
index 00000000..bda2da78
--- /dev/null
+++ b/kamon-core/src/main/scala/kamon/instrumentation/scala/FutureInstrumentation.scala
@@ -0,0 +1,48 @@
+/*
+ * =========================================================================================
+ * Copyright © 2013-2014 the kamon project <http://kamon.io/>
+ *
+ * Licensed 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.
+ * =========================================================================================
+ */
+
+package kamon.instrumentation.scala
+
+import kamon.trace.{ TraceContextAware, TraceRecorder }
+import org.aspectj.lang.ProceedingJoinPoint
+import org.aspectj.lang.annotation._
+
+@Aspect
+class FutureInstrumentation {
+
+  @DeclareMixin("scala.concurrent.impl.CallbackRunnable || scala.concurrent.impl.Future.PromiseCompletingRunnable")
+  def mixinTraceContextAwareToFutureRelatedRunnable: TraceContextAware = TraceContextAware.default
+
+  @Pointcut("execution((scala.concurrent.impl.CallbackRunnable || scala.concurrent.impl.Future.PromiseCompletingRunnable).new(..)) && this(runnable)")
+  def futureRelatedRunnableCreation(runnable: TraceContextAware): Unit = {}
+
+  @After("futureRelatedRunnableCreation(runnable)")
+  def afterCreation(runnable: TraceContextAware): Unit = {
+    // Force traceContext initialization.
+    runnable.traceContext
+  }
+
+  @Pointcut("execution(* (scala.concurrent.impl.CallbackRunnable || scala.concurrent.impl.Future.PromiseCompletingRunnable).run()) && this(runnable)")
+  def futureRelatedRunnableExecution(runnable: TraceContextAware) = {}
+
+  @Around("futureRelatedRunnableExecution(runnable)")
+  def aroundExecution(pjp: ProceedingJoinPoint, runnable: TraceContextAware): Any = {
+    TraceRecorder.withInlineTraceContextReplacement(runnable.traceContext) {
+      pjp.proceed()
+    }
+  }
+
+}