opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/datastore/ForwardingDataTreeChangeListener.java

   1 /*
   2  * Copyright (c) 2015 Cisco Systems, Inc. and others.  All rights reserved.
   3  *
   4  * This program and the accompanying materials are made available under the
   5  * terms of the Eclipse Public License v1.0 which accompanies this distribution,
   6  * and is available at http://www.eclipse.org/legal/epl-v10.html
   7  */
   8 package org.opendaylight.controller.cluster.datastore;
   9
  10 import com.google.common.base.Preconditions;
  11 import akka.actor.ActorRef;
  12 import akka.actor.ActorSelection;
  13 import java.util.Collection;
  14 import org.opendaylight.controller.cluster.datastore.messages.DataTreeChanged;
  15 import org.opendaylight.controller.md.sal.dom.api.DOMDataTreeChangeListener;
  16 import org.opendaylight.yangtools.yang.data.api.schema.tree.DataTreeCandidate;
  17
  18 /**
  19  * Internal implementation of a {@link DOMDataTreeChangeListener} which
  20  * encapsulates received notifications into a {@link DataTreeChanged}
  21  * message and forwards them towards the client's {@link DataTreeChangeListenerActor}.
  22  */
  23 final class ForwardingDataTreeChangeListener implements DOMDataTreeChangeListener {
  24     private final ActorSelection actor;
  25
  26     ForwardingDataTreeChangeListener(final ActorSelection actor) {
  27         this.actor = Preconditions.checkNotNull(actor, "actor should not be null");
  28     }
  29
  30     @Override
  31     public void onDataTreeChanged(Collection<DataTreeCandidate> changes) {
  32         actor.tell(new DataTreeChanged(changes), ActorRef.noSender());
  33     }
  34 }