opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/datastore/DataTreeChangeListenerSupport.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 org.opendaylight.controller.cluster.datastore.actors.DataTreeNotificationListenerRegistrationActor;
  13 import org.opendaylight.controller.cluster.datastore.messages.RegisterDataTreeChangeListener;
  14 import org.opendaylight.controller.cluster.datastore.messages.RegisterDataTreeChangeListenerReply;
  15 import org.opendaylight.controller.md.sal.dom.api.DOMDataTreeChangeListener;
  16
  17 final class DataTreeChangeListenerSupport extends AbstractDataListenerSupport<DOMDataTreeChangeListener,
  18         RegisterDataTreeChangeListener> {
  19
  20     DataTreeChangeListenerSupport(final Shard shard) {
  21         super(shard);
  22     }
  23
  24     @Override
  25     void doRegistration(final RegisterDataTreeChangeListener message, final ActorRef registrationActor) {
  26         final ActorSelection listenerActor = processListenerRegistrationMessage(message);
  27
  28         DOMDataTreeChangeListener listener = new ForwardingDataTreeChangeListener(listenerActor);
  29
  30         log().debug("{}: Registering for path {}", persistenceId(), message.getPath());
  31
  32         final ShardDataTree shardDataTree = getShard().getDataStore();
  33         shardDataTree.registerTreeChangeListener(message.getPath(),
  34                 listener, shardDataTree.readCurrentData(), registration -> registrationActor.tell(
  35                         new DataTreeNotificationListenerRegistrationActor.SetRegistration(registration, () ->
  36                             removeListenerActor(listenerActor)), ActorRef.noSender()));
  37     }
  38
  39     @Override
  40     protected Object newRegistrationReplyMessage(ActorRef registrationActor) {
  41         return new RegisterDataTreeChangeListenerReply(registrationActor);
  42     }
  43
  44     @Override
  45     protected String logName() {
  46         return "registerTreeChangeListener";
  47     }
  48 }