From 7a10c0ef2a6566229e8571f6d385ca2ff794cc20 Mon Sep 17 00:00:00 2001
From: Ivan Topolnak <itopolnak@despegar.com>
Date: Thu, 2 Jan 2014 18:09:53 -0300
Subject: integrate trace and metrics into the base project

---
 .../kamon/instrumentation/FutureTracing.scala      | 47 ++++++++++++++++++++++
 1 file changed, 47 insertions(+)
 create mode 100644 kamon-core/src/main/scala/kamon/instrumentation/FutureTracing.scala

(limited to 'kamon-core/src/main/scala/kamon/instrumentation/FutureTracing.scala')

diff --git a/kamon-core/src/main/scala/kamon/instrumentation/FutureTracing.scala b/kamon-core/src/main/scala/kamon/instrumentation/FutureTracing.scala
new file mode 100644
index 00000000..5600d582
--- /dev/null
+++ b/kamon-core/src/main/scala/kamon/instrumentation/FutureTracing.scala
@@ -0,0 +1,47 @@
+/* ===================================================
+ * Copyright © 2013 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
+
+import org.aspectj.lang.annotation._
+import org.aspectj.lang.ProceedingJoinPoint
+import kamon.trace.{ ContextAware, TraceContext, Trace }
+
+@Aspect
+class FutureTracing {
+
+  @DeclareMixin("scala.concurrent.impl.CallbackRunnable || scala.concurrent.impl.Future.PromiseCompletingRunnable")
+  def mixin: ContextAware = ContextAware.default
+
+  @Pointcut("execution((scala.concurrent.impl.CallbackRunnable || scala.concurrent.impl.Future.PromiseCompletingRunnable).new(..)) && this(runnable)")
+  def futureRelatedRunnableCreation(runnable: ContextAware): Unit = {}
+
+  @After("futureRelatedRunnableCreation(runnable)")
+  def afterCreation(runnable: ContextAware): Unit = {
+    // Force traceContext initialization.
+    runnable.traceContext
+  }
+
+  @Pointcut("execution(* (scala.concurrent.impl.CallbackRunnable || scala.concurrent.impl.Future.PromiseCompletingRunnable).run()) && this(runnable)")
+  def futureRelatedRunnableExecution(runnable: ContextAware) = {}
+
+  @Around("futureRelatedRunnableExecution(runnable)")
+  def aroundExecution(pjp: ProceedingJoinPoint, runnable: ContextAware): Any = {
+    Trace.withContext(runnable.traceContext) {
+      pjp.proceed()
+    }
+  }
+
+}
\ No newline at end of file
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