Adding route subsystem code to support EVPN

Change-Id: I5d9715af8e2a9474892267c97cd4763f12be4816
diff --git a/incubator/api/src/main/java/org/onosproject/incubator/net/routing/EvpnInternalRouteEvent.java b/incubator/api/src/main/java/org/onosproject/incubator/net/routing/EvpnInternalRouteEvent.java
new file mode 100644
index 0000000..046927b
--- /dev/null
+++ b/incubator/api/src/main/java/org/onosproject/incubator/net/routing/EvpnInternalRouteEvent.java
@@ -0,0 +1,55 @@
+/*
+ * 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.onosproject.incubator.net.routing;
+
+import org.onosproject.event.AbstractEvent;
+
+/**
+ * Route event for signalling between the store and the manager.
+ */
+public class EvpnInternalRouteEvent extends
+        AbstractEvent<EvpnInternalRouteEvent.Type, EvpnRouteSet> {
+
+    /**
+     * Internal route event type.
+     */
+    public enum Type {
+        /**
+         * Indicates a route was added to the store.
+         */
+        ROUTE_ADDED,
+
+        /**
+         * Indicates a route was removed from the store.
+         */
+        ROUTE_REMOVED
+    }
+
+    /**
+     * Creates a new internal route event.
+     *
+     * @param type    route event type
+     * @param subject route set
+     */
+    public EvpnInternalRouteEvent(Type type, EvpnRouteSet subject) {
+        super(type, subject);
+    }
+
+    public EvpnInternalRouteEvent(Type type, EvpnRouteSet subject, long time) {
+        super(type, subject, time);
+    }
+}