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 akka.actor.ActorRef;
  11 import akka.actor.ActorSelection;
  12 import com.google.common.base.Preconditions;
  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 import org.slf4j.Logger;
  18 import org.slf4j.LoggerFactory;
  19
  20 /**
  21  * Internal implementation of a {@link DOMDataTreeChangeListener} which
  22  * encapsulates received notifications into a {@link DataTreeChanged}
  23  * message and forwards them towards the client's {@link DataTreeChangeListenerActor}.
  24  */
  25 final class ForwardingDataTreeChangeListener implements DOMDataTreeChangeListener {
  26     private static final Logger LOG = LoggerFactory.getLogger(ForwardingDataTreeChangeListener.class);
  27
  28     private final ActorSelection actor;
  29
  30     ForwardingDataTreeChangeListener(final ActorSelection actor) {
  31         this.actor = Preconditions.checkNotNull(actor, "actor should not be null");
  32     }
  33
  34     @Override
  35     public void onDataTreeChanged(Collection<DataTreeCandidate> changes) {
  36         LOG.debug("Sending DataTreeChanged to {}", actor);
  37         actor.tell(new DataTreeChanged(changes), ActorRef.noSender());
  38     }
  39
  40     @Override
  41     public String toString() {
  42         return "ForwardingDataTreeChangeListener [actor=" + actor + "]";
  43     }
  44 }