adding a multicast service to track multicast information.
This will be used by publishers to advertise multicast information
and by consumers to realise it on the dataplane.
This is currently an app but it may be moved to incubation.
Change-Id: I6e350989207ce2207bf70da22ca15c8237b1d240
diff --git a/apps/mcast/src/main/java/org/onosproject/mcast/McastListener.java b/apps/mcast/src/main/java/org/onosproject/mcast/McastListener.java
new file mode 100644
index 0000000..cbd84af
--- /dev/null
+++ b/apps/mcast/src/main/java/org/onosproject/mcast/McastListener.java
@@ -0,0 +1,24 @@
+/*
+ * Copyright 2015 Open Networking Laboratory
+ *
+ * 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 org.onosproject.mcast;
+
+import org.onosproject.event.EventListener;
+
+/**
+ * A listener interface for multicast events.
+ */
+public interface McastListener extends EventListener<McastEvent> {
+}