Added application ID store; both trivial and distributed variants.
diff --git a/core/store/dist/src/main/java/org/onlab/onos/store/core/impl/AppIdEvent.java b/core/store/dist/src/main/java/org/onlab/onos/store/core/impl/AppIdEvent.java
new file mode 100644
index 0000000..3dd626c
--- /dev/null
+++ b/core/store/dist/src/main/java/org/onlab/onos/store/core/impl/AppIdEvent.java
@@ -0,0 +1,37 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you 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.onlab.onos.store.core.impl;
+
+import org.onlab.onos.core.ApplicationId;
+import org.onlab.onos.event.AbstractEvent;
+
+/**
+ * Application ID event.
+ */
+public class AppIdEvent extends AbstractEvent<AppIdEvent.Type, ApplicationId> {
+
+ public enum Type {
+ APP_REGISTERED
+ }
+
+ protected AppIdEvent(Type type, ApplicationId subject) {
+ super(type, subject);
+ }
+
+}