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 static java.util.Objects.requireNonNull;
  11
  12 import java.util.Optional;
  13 import org.eclipse.jdt.annotation.NonNull;
  14 import org.eclipse.jdt.annotation.Nullable;
  15 import org.opendaylight.controller.cluster.notifications.LeaderStateChanged;
  16 import org.opendaylight.yangtools.yang.data.api.schema.tree.DataTree;
  17
  18 /**
  19  * A local message derived from LeaderStateChanged containing additional Shard-specific info that is sent
  20  * when some state of the shard leader has changed. This message is used by the ShardManager to maintain
  21  * current Shard information.
  22  *
  23  * @author Thomas Pantelis
  24  */
  25 public class ShardLeaderStateChanged extends LeaderStateChanged {
  26
  27     private final DataTree localShardDataTree;
  28
  29     public ShardLeaderStateChanged(@NonNull String memberId, @Nullable String leaderId,
  30             @NonNull DataTree localShardDataTree, short leaderPayloadVersion) {
  31         super(memberId, leaderId, leaderPayloadVersion);
  32         this.localShardDataTree = requireNonNull(localShardDataTree);
  33     }
  34
  35     public ShardLeaderStateChanged(@NonNull String memberId, @Nullable String leaderId,
  36             short leaderPayloadVersion) {
  37         super(memberId, leaderId, leaderPayloadVersion);
  38         this.localShardDataTree = null;
  39     }
  40
  41     public @NonNull Optional<DataTree> getLocalShardDataTree() {
  42         return Optional.ofNullable(localShardDataTree);
  43     }
  44 }