opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/datastore/messages/PrimaryShardInfo.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 akka.actor.ActorSelection;
  11 import com.google.common.base.Preconditions;
  12 import java.util.Optional;
  13 import javax.annotation.Nonnull;
  14 import org.opendaylight.yangtools.yang.data.api.schema.tree.DataTree;
  15
  16 /**
  17  * Local message DTO that contains information about the primary shard.
  18  *
  19  * @author Thomas Pantelis
  20  */
  21 public class PrimaryShardInfo {
  22     private final ActorSelection primaryShardActor;
  23     private final short primaryShardVersion;
  24     private final DataTree localShardDataTree;
  25
  26     public PrimaryShardInfo(@Nonnull ActorSelection primaryShardActor, short primaryShardVersion,
  27             @Nonnull DataTree localShardDataTree) {
  28         this.primaryShardActor = Preconditions.checkNotNull(primaryShardActor);
  29         this.primaryShardVersion = primaryShardVersion;
  30         this.localShardDataTree = Preconditions.checkNotNull(localShardDataTree);
  31     }
  32
  33     public PrimaryShardInfo(@Nonnull ActorSelection primaryShardActor, short primaryShardVersion) {
  34         this.primaryShardActor = Preconditions.checkNotNull(primaryShardActor);
  35         this.primaryShardVersion = primaryShardVersion;
  36         this.localShardDataTree = null;
  37     }
  38
  39     /**
  40      * Returns an ActorSelection representing the primary shard actor.
  41      */
  42     public @Nonnull ActorSelection getPrimaryShardActor() {
  43         return primaryShardActor;
  44     }
  45
  46     /**
  47      * Returns the version of the primary shard.
  48      */
  49     public short getPrimaryShardVersion() {
  50         return primaryShardVersion;
  51     }
  52
  53     /**
  54      * Returns an Optional whose value contains the primary shard's DataTree if the primary shard is local
  55      * to the caller. Otherwise the Optional value is absent.
  56      */
  57     public @Nonnull Optional<DataTree> getLocalShardDataTree() {
  58         return Optional.ofNullable(localShardDataTree);
  59     }
  60 }