opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/datastore/messages/ShardLeaderStateChanged.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.messages;
   9
  10 import com.google.common.base.Preconditions;
  11 import java.util.Optional;
  12 import javax.annotation.Nonnull;
  13 import javax.annotation.Nullable;
  14 import org.opendaylight.controller.cluster.notifications.LeaderStateChanged;
  15 import org.opendaylight.yangtools.yang.data.api.schema.tree.DataTree;
  16
  17 /**
  18  * A local message derived from LeaderStateChanged containing additional Shard-specific info that is sent
  19  * when some state of the shard leader has changed. This message is used by the ShardManager to maintain
  20  * current Shard information.
  21  *
  22  * @author Thomas Pantelis
  23  */
  24 public class ShardLeaderStateChanged extends LeaderStateChanged {
  25
  26     private final DataTree localShardDataTree;
  27
  28     public ShardLeaderStateChanged(@Nonnull String memberId, @Nullable String leaderId,
  29             @Nonnull DataTree localShardDataTree, short leaderPayloadVersion) {
  30         super(memberId, leaderId, leaderPayloadVersion);
  31         this.localShardDataTree = Preconditions.checkNotNull(localShardDataTree);
  32     }
  33
  34     public ShardLeaderStateChanged(@Nonnull String memberId, @Nullable String leaderId,
  35             short leaderPayloadVersion) {
  36         super(memberId, leaderId, leaderPayloadVersion);
  37         this.localShardDataTree = null;
  38     }
  39
  40     public @Nonnull Optional<DataTree> getLocalShardDataTree() {
  41         return Optional.ofNullable(localShardDataTree);
  42     }
  43 }