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