1 files changed, 45 insertions, 0 deletions
diff --git a/kamon-core/src/legacy-main/scala/kamon/trace/TraceSubscriptions.scala b/kamon-core/src/legacy-main/scala/kamon/trace/TraceSubscriptions.scala
new file mode 100644
index 00000000..47455ec5
--- /dev/null
+++ b/kamon-core/src/legacy-main/scala/kamon/trace/TraceSubscriptions.scala
@@ -0,0 +1,45 @@
+/*
+ * =========================================================================================
+ * 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.trace
+
+import akka.actor.{Terminated, ActorRef, Actor}
+
+class TraceSubscriptions extends Actor {
+  import TraceSubscriptions._
+
+  var subscribers: List[ActorRef] = Nil
+
+  def receive = {
+    case Subscribe(newSubscriber) ⇒
+      if (!subscribers.contains(newSubscriber))
+        subscribers = context.watch(newSubscriber) :: subscribers
+
+    case Unsubscribe(leavingSubscriber) ⇒
+      subscribers = subscribers.filter(_ == leavingSubscriber)
+
+    case Terminated(terminatedSubscriber) ⇒
+      subscribers = subscribers.filter(_ == terminatedSubscriber)
+
+    case trace: TraceInfo ⇒
+      subscribers.foreach(_ ! trace)
+  }
+}
+
+object TraceSubscriptions {
+  case class Subscribe(subscriber: ActorRef)
+  case class Unsubscribe(subscriber: ActorRef)
+}