Complete implementation of DataChangeListenerRegistration and related classes

[controller.git] / opendaylight / md-sal / sal-distributed-datastore / src / main / java / org / opendaylight / controller / cluster / datastore / DataChangeListenerRegistrationProxy.java

diff --git a/opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/datastore/DataChangeListenerRegistrationProxy.java b/opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/datastore/DataChangeListenerRegistrationProxy.java
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+++ b/opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/datastore/DataChangeListenerRegistrationProxy.java
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+/*
+ * Copyright (c) 2014 Cisco Systems, Inc. and others.  All rights reserved.
+ *
+ * This program and the accompanying materials are made available under the
+ * terms of the Eclipse Public License v1.0 which accompanies this distribution,
+ * and is available at http://www.eclipse.org/legal/epl-v10.html
+ */
+
+package org.opendaylight.controller.cluster.datastore;
+
+import akka.actor.ActorSelection;
+import org.opendaylight.controller.cluster.datastore.messages.CloseDataChangeListenerRegistration;
+import org.opendaylight.controller.md.sal.common.api.data.AsyncDataChangeListener;
+import org.opendaylight.yangtools.concepts.ListenerRegistration;
+import org.opendaylight.yangtools.yang.data.api.InstanceIdentifier;
+import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
+
+/**
+ * ListenerRegistrationProxy acts as a proxy for a ListenerRegistration that was done on a remote shard
+ * <p>
+ * Registering a DataChangeListener on the Data Store creates a new instance of the ListenerRegistrationProxy
+ * The ListenerRegistrationProxy talks to a remote ListenerRegistration actor.
+ * </p>
+ */
+public class DataChangeListenerRegistrationProxy implements ListenerRegistration {
+    private final ActorSelection listenerRegistrationActor;
+    private final AsyncDataChangeListener listener;
+
+    public <L extends AsyncDataChangeListener<InstanceIdentifier, NormalizedNode<?, ?>>>
+    DataChangeListenerRegistrationProxy(
+        ActorSelection listenerRegistrationActor,
+        L listener) {
+        this.listenerRegistrationActor = listenerRegistrationActor;
+        this.listener = listener;
+    }
+
+    @Override
+    public Object getInstance() {
+        return listener;
+    }
+
+    @Override
+    public void close() {
+        listenerRegistrationActor.tell(new CloseDataChangeListenerRegistration(), null);
+    }
+}