opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/datastore/actors/client/SavingClientActorBehavior.java

   1 /*
   2  * Copyright (c) 2016 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.actors.client;
   9
  10 import akka.persistence.SaveSnapshotFailure;
  11 import akka.persistence.SaveSnapshotSuccess;
  12 import akka.persistence.SnapshotSelectionCriteria;
  13 import com.google.common.base.Preconditions;
  14 import org.opendaylight.controller.cluster.access.concepts.ClientIdentifier;
  15 import org.slf4j.Logger;
  16 import org.slf4j.LoggerFactory;
  17
  18 /**
  19  * @author Robert Varga
  20  */
  21 final class SavingClientActorBehavior extends RecoveredClientActorBehavior<InitialClientActorContext> {
  22     private static final Logger LOG = LoggerFactory.getLogger(SavingClientActorBehavior.class);
  23     private final ClientIdentifier myId;
  24
  25     SavingClientActorBehavior(final InitialClientActorContext context, final ClientIdentifier nextId) {
  26         super(context);
  27         this.myId = Preconditions.checkNotNull(nextId);
  28     }
  29
  30     @Override
  31     AbstractClientActorBehavior<?> onReceiveCommand(final Object command) {
  32         if (command instanceof SaveSnapshotFailure) {
  33             LOG.error("{}: failed to persist state", persistenceId(), ((SaveSnapshotFailure) command).cause());
  34             return null;
  35         } else if (command instanceof SaveSnapshotSuccess) {
  36             context().unstash();
  37
  38             SaveSnapshotSuccess saved = (SaveSnapshotSuccess)command;
  39             context().deleteSnapshots(new SnapshotSelectionCriteria(saved.metadata().sequenceNr(),
  40                     saved.metadata().timestamp() - 1, 0L, 0L));
  41
  42             return context().createBehavior(myId);
  43         } else {
  44             LOG.debug("{}: stashing command {}", persistenceId(), command);
  45             context().stash();
  46             return this;
  47         }
  48     }
  49 }