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

   1 /*
   2  * Copyright (c) 2015 Brocade Communications 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.entityownership;
   9
  10 import akka.actor.Props;
  11 import akka.japi.Creator;
  12 import com.google.common.base.Preconditions;
  13 import org.opendaylight.controller.cluster.common.actor.AbstractUntypedActor;
  14 import org.opendaylight.controller.md.sal.common.api.clustering.EntityOwnershipChange;
  15 import org.opendaylight.controller.md.sal.common.api.clustering.EntityOwnershipListener;
  16 import org.slf4j.Logger;
  17 import org.slf4j.LoggerFactory;
  18
  19 /**
  20  * An actor which is responsible for notifying an EntityOwnershipListener of changes.
  21  *
  22  * @author Thomas Pantelis
  23  */
  24 class EntityOwnershipListenerActor extends AbstractUntypedActor {
  25     private static final Logger LOG = LoggerFactory.getLogger(EntityOwnershipListenerActor.class);
  26
  27     private final EntityOwnershipListener listener;
  28
  29     private EntityOwnershipListenerActor(EntityOwnershipListener listener) {
  30         this.listener = listener;
  31     }
  32
  33     @Override
  34     protected void handleReceive(Object message) {
  35         if(message instanceof EntityOwnershipChange) {
  36             onEntityOwnershipChanged((EntityOwnershipChange)message);
  37         }
  38     }
  39
  40     private void onEntityOwnershipChanged(EntityOwnershipChange change) {
  41         LOG.debug("Notifying EntityOwnershipListener {}: {}", listener, change);
  42
  43         try {
  44             listener.ownershipChanged(change);
  45         } catch (Exception e) {
  46             LOG.error("Error notifying listener {}", listener, e);
  47         }
  48     }
  49
  50     static Props props(EntityOwnershipListener listener) {
  51         return Props.create(new EntityOwnershipListenerCreator(listener));
  52     }
  53
  54     private static final class EntityOwnershipListenerCreator implements Creator<EntityOwnershipListenerActor> {
  55         private static final long serialVersionUID = 1L;
  56
  57         private final EntityOwnershipListener listener;
  58
  59         EntityOwnershipListenerCreator(EntityOwnershipListener listener) {
  60             this.listener = Preconditions.checkNotNull(listener);
  61         }
  62
  63         @Override
  64         public EntityOwnershipListenerActor create() {
  65             return new EntityOwnershipListenerActor(listener);
  66         }
  67     }
  68 }