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         currentMemberName = MemberName.forName(cluster.getSelfRoles().iterator().next());
  36         selfAddress = cluster.selfAddress();
  37     }
  38
  39     @Override
  40     public void subscribeToMemberEvents(ActorRef actorRef) {
  41         Preconditions.checkNotNull(actorRef, "actorRef should not be null");
  42
  43         cluster.subscribe(actorRef, ClusterEvent.initialStateAsEvents(),
  44             ClusterEvent.MemberEvent.class,
  45             ClusterEvent.UnreachableMember.class,
  46             ClusterEvent.ReachableMember.class);
  47     }
  48
  49     @Override
  50     public MemberName getCurrentMemberName() {
  51         return currentMemberName;
  52     }
  53
  54     @Override
  55     public Address getSelfAddress() {
  56         return selfAddress;
  57     }
  58 }