1 files changed, 63 insertions, 0 deletions
diff --git a/site/src/test/scala/kamon/docs/trace/SimpleContextPropagation.scala b/site/src/test/scala/kamon/docs/trace/SimpleContextPropagation.scala
new file mode 100644
index 00000000..e8b1635f
--- /dev/null
+++ b/site/src/test/scala/kamon/docs/trace/SimpleContextPropagation.scala
@@ -0,0 +1,63 @@
+/*
+ * =========================================================================================
+ * 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.docs.trace
+
+import akka.actor._
+import akka.testkit.{ImplicitSender, TestKit}
+import org.scalatest.WordSpecLike
+import kamon.trace.TraceRecorder
+
+
+class SimpleContextPropagation extends TestKit(ActorSystem("simple-context-propagation"))
+  with WordSpecLike with ImplicitSender {
+
+  "Kamon propagates the TraceContext when sending messages between actors" in {
+    val upperCaser = system.actorOf(Props[UpperCaser], "upper-caser")
+
+    for(_ <- 1 to 5) {
+      upperCaser ! s"Hello without context"
+    }
+
+    expectMsgAllOf(21, 21, 21, 21, 21)
+
+    for(_ <- 1 to 5) {
+      TraceRecorder.withNewTraceContext("simple-test") {
+        upperCaser ! "Hello World with TraceContext"
+      }
+    }
+
+    expectMsgAllOf(29, 29, 29, 29, 29)
+  }
+}
+
+class UpperCaser extends Actor with ActorLogging {
+  val lengthCalculator = context.actorOf(Props[LengthCalculator], "length-calculator")
+
+  def receive = {
+    case anyString: String =>
+      log.info("Upper casing [{}]", anyString)
+      lengthCalculator.forward(anyString.toUpperCase)
+  }
+}
+
+class LengthCalculator extends Actor with ActorLogging  {
+  def receive = {
+    case anyString: String =>
+      log.info("Calculating the length of: [{}]", anyString)
+      sender ! anyString.length
+  }
+}
+\ No newline at end of file