Added application ID store; both trivial and distributed variants.
diff --git a/core/store/serializers/src/main/java/org/onlab/onos/store/serializers/DefaultApplicationIdSerializer.java b/core/store/serializers/src/main/java/org/onlab/onos/store/serializers/DefaultApplicationIdSerializer.java
new file mode 100644
index 0000000..87e9ba4
--- /dev/null
+++ b/core/store/serializers/src/main/java/org/onlab/onos/store/serializers/DefaultApplicationIdSerializer.java
@@ -0,0 +1,52 @@
+/*
+ * 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.serializers;
+
+import com.esotericsoftware.kryo.Kryo;
+import com.esotericsoftware.kryo.Serializer;
+import com.esotericsoftware.kryo.io.Input;
+import com.esotericsoftware.kryo.io.Output;
+import org.onlab.onos.core.DefaultApplicationId;
+
+/**
+ * Kryo Serializer for {@link org.onlab.onos.core.DefaultApplicationId}.
+ */
+public final class DefaultApplicationIdSerializer extends Serializer<DefaultApplicationId> {
+
+    /**
+     * Creates {@link org.onlab.onos.core.DefaultApplicationId} serializer instance.
+     */
+    public DefaultApplicationIdSerializer() {
+        // non-null, immutable
+        super(false, true);
+    }
+
+    @Override
+    public void write(Kryo kryo, Output output, DefaultApplicationId object) {
+        kryo.writeObject(output, object.id());
+        kryo.writeObject(output, object.name());
+    }
+
+    @Override
+    public DefaultApplicationId read(Kryo kryo, Input input, Class<DefaultApplicationId> type) {
+        short id = kryo.readObject(input, Short.class);
+        String name = kryo.readObject(input, String.class);
+        return new DefaultApplicationId(id, name);
+    }
+}