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

   1 /*
   2  * Copyright (c) 2014 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
   9 package org.opendaylight.controller.cluster.datastore;
  10
  11 import akka.actor.ActorRef;
  12 import akka.actor.ActorSystem;
  13 import akka.actor.Address;
  14 import akka.cluster.Cluster;
  15 import akka.cluster.ClusterEvent;
  16 import com.google.common.base.Preconditions;
  17 import org.opendaylight.controller.cluster.access.concepts.MemberName;
  18
  19 public class ClusterWrapperImpl implements ClusterWrapper {
  20     private final Cluster cluster;
  21     private final MemberName currentMemberName;
  22     private final Address selfAddress;
  23
  24     public ClusterWrapperImpl(ActorSystem actorSystem){
  25         Preconditions.checkNotNull(actorSystem, "actorSystem should not be null");
  26
  27         cluster = Cluster.get(actorSystem);
  28
  29         Preconditions.checkState(cluster.getSelfRoles().size() > 0,
  30             "No akka roles were specified\n" +
  31                 "One way to specify the member name is to pass a property on the command line like so\n" +
  32                 "   -Dakka.cluster.roles.0=member-3\n" +
  33                 "member-3 here would be the name of the member"
  34         );
  35
  36         currentMemberName = MemberName.forName(cluster.getSelfRoles().iterator().next());
  37         selfAddress = cluster.selfAddress();
  38     }
  39
  40     @Override
  41     public void subscribeToMemberEvents(ActorRef actorRef){
  42         Preconditions.checkNotNull(actorRef, "actorRef should not be null");
  43
  44         cluster.subscribe(actorRef, ClusterEvent.initialStateAsEvents(),
  45             ClusterEvent.MemberEvent.class,
  46             ClusterEvent.UnreachableMember.class,
  47             ClusterEvent.ReachableMember.class);
  48     }
  49
  50     @Override
  51     public MemberName getCurrentMemberName() {
  52         return currentMemberName;
  53     }
  54
  55     @Override
  56     public Address getSelfAddress() {
  57         return selfAddress;
  58     }
  59 }