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 edu.umd.cs.findbugs.annotations.SuppressFBWarnings;
  14 import org.opendaylight.controller.cluster.common.actor.AbstractUntypedActor;
  15 import org.opendaylight.mdsal.eos.dom.api.DOMEntityOwnershipChange;
  16 import org.opendaylight.mdsal.eos.dom.api.DOMEntityOwnershipListener;
  17
  18 /**
  19  * An actor which is responsible for notifying an EntityOwnershipListener of changes.
  20  *
  21  * @author Thomas Pantelis
  22  */
  23 final class EntityOwnershipListenerActor extends AbstractUntypedActor {
  24     private final DOMEntityOwnershipListener listener;
  25
  26     private EntityOwnershipListenerActor(final DOMEntityOwnershipListener listener) {
  27         this.listener = listener;
  28     }
  29
  30     @Override
  31     protected void handleReceive(final Object message) {
  32         if (message instanceof DOMEntityOwnershipChange) {
  33             onEntityOwnershipChanged((DOMEntityOwnershipChange)message);
  34         } else {
  35             unknownMessage(message);
  36         }
  37     }
  38
  39     @SuppressWarnings("checkstyle:IllegalCatch")
  40     private void onEntityOwnershipChanged(final DOMEntityOwnershipChange 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(final DOMEntityOwnershipListener 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         @SuppressFBWarnings(value = "SE_BAD_FIELD", justification = "This field is not Serializable but we don't "
  58                 + "create remote instances of this actor and thus don't need it to be Serializable.")
  59         private final DOMEntityOwnershipListener listener;
  60
  61         EntityOwnershipListenerCreator(final DOMEntityOwnershipListener listener) {
  62             this.listener = Preconditions.checkNotNull(listener);
  63         }
  64
  65         @Override
  66         public EntityOwnershipListenerActor create() {
  67             return new EntityOwnershipListenerActor(listener);
  68         }
  69     }
  70 }