SEBA-640 IgmpProxy should use distributed storage infrastructure of ONOS

Change-Id: I4b1c4d326a5501e9c0e046e3ee8d973ca5f73d70
diff --git a/app/src/main/java/org/opencord/igmpproxy/impl/store/groupmember/GroupMemberEvent.java b/app/src/main/java/org/opencord/igmpproxy/impl/store/groupmember/GroupMemberEvent.java
new file mode 100644
index 0000000..494b89b
--- /dev/null
+++ b/app/src/main/java/org/opencord/igmpproxy/impl/store/groupmember/GroupMemberEvent.java
@@ -0,0 +1,56 @@
+/*
+ * Copyright 2017-present Open Networking Foundation
+ *
+ * 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.opencord.igmpproxy.impl.store.groupmember;
+
+import org.onosproject.event.AbstractEvent;
+
+/**
+ * Group-member event.
+ */
+public class GroupMemberEvent extends
+        AbstractEvent<GroupMemberEvent.Type, GroupMember> {
+
+    /**
+     * Type of group-member event.
+     */
+    public enum Type {
+        /**
+         * Signifies that group-member added to store.
+         */
+        GROUP_MEMBER_ADDED,
+        /**
+         * Signifies that group-member updated in store.
+         */
+        GROUP_MEMBER_UPDATED,
+        /**
+         * Signifies that group-member has been removed from store.
+         */
+        GROUP_MEMBER_REMOVED
+    }
+
+    /**
+     *
+     * @param type group-member event type.
+     * @param subject group-member.
+     */
+    public GroupMemberEvent(GroupMemberEvent.Type type, GroupMember subject) {
+        super(type, subject);
+    }
+
+    protected GroupMemberEvent(GroupMemberEvent.Type type, GroupMember subject, long time) {
+        super(type, subject, time);
+    }
+}