opendaylight/md-sal/sal-akka-raft/src/main/java/org/opendaylight/controller/cluster/raft/GetSnapshotReplyActor.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.raft;
   9
  10 import akka.actor.ActorRef;
  11 import akka.actor.PoisonPill;
  12 import akka.actor.Props;
  13 import akka.actor.ReceiveTimeout;
  14 import akka.actor.UntypedActor;
  15 import com.google.common.base.Preconditions;
  16 import java.util.concurrent.TimeoutException;
  17 import org.apache.commons.lang3.SerializationUtils;
  18 import org.opendaylight.controller.cluster.raft.base.messages.CaptureSnapshot;
  19 import org.opendaylight.controller.cluster.raft.base.messages.CaptureSnapshotReply;
  20 import org.opendaylight.controller.cluster.raft.client.messages.GetSnapshotReply;
  21 import org.opendaylight.controller.cluster.raft.persisted.ServerConfigurationPayload;
  22 import org.opendaylight.controller.cluster.raft.persisted.Snapshot;
  23 import org.slf4j.Logger;
  24 import org.slf4j.LoggerFactory;
  25 import scala.concurrent.duration.Duration;
  26
  27 /**
  28  * Temporary actor used to receive a CaptureSnapshotReply message and return a GetSnapshotReply instance.
  29  *
  30  * @author Thomas Pantelis
  31  */
  32 class GetSnapshotReplyActor extends UntypedActor {
  33     private static final Logger LOG = LoggerFactory.getLogger(GetSnapshotReplyActor.class);
  34
  35     private final Params params;
  36
  37     private GetSnapshotReplyActor(Params params) {
  38         this.params = params;
  39
  40         getContext().setReceiveTimeout(params.receiveTimeout);
  41     }
  42
  43     @Override
  44     public void onReceive(Object message) {
  45         if (message instanceof CaptureSnapshotReply) {
  46             Snapshot snapshot = Snapshot.create(
  47                     ((CaptureSnapshotReply)message).getSnapshotState(),
  48                     params.captureSnapshot.getUnAppliedEntries(),
  49                     params.captureSnapshot.getLastIndex(), params.captureSnapshot.getLastTerm(),
  50                     params.captureSnapshot.getLastAppliedIndex(), params.captureSnapshot.getLastAppliedTerm(),
  51                     params.electionTerm.getCurrentTerm(), params.electionTerm.getVotedFor(),
  52                     params.peerInformation);
  53
  54             LOG.debug("{}: Received CaptureSnapshotReply, sending {}", params.id, snapshot);
  55
  56             params.replyToActor.tell(new GetSnapshotReply(params.id, SerializationUtils.serialize(snapshot)),
  57                     getSelf());
  58             getSelf().tell(PoisonPill.getInstance(), getSelf());
  59         } else if (message instanceof ReceiveTimeout) {
  60             LOG.warn("{}: Got ReceiveTimeout for inactivity - did not receive CaptureSnapshotReply within {} ms",
  61                     params.id, params.receiveTimeout.toMillis());
  62
  63             params.replyToActor.tell(new akka.actor.Status.Failure(new TimeoutException(String.format(
  64                     "Timed out after %d ms while waiting for CaptureSnapshotReply",
  65                         params.receiveTimeout.toMillis()))), getSelf());
  66             getSelf().tell(PoisonPill.getInstance(), getSelf());
  67         }
  68     }
  69
  70     public static Props props(CaptureSnapshot captureSnapshot, ElectionTerm electionTerm, ActorRef replyToActor,
  71             Duration receiveTimeout, String id, ServerConfigurationPayload updatedPeerInfo) {
  72         return Props.create(GetSnapshotReplyActor.class, new Params(captureSnapshot, electionTerm, replyToActor,
  73                 receiveTimeout, id, updatedPeerInfo));
  74     }
  75
  76     private static final class Params {
  77         final CaptureSnapshot captureSnapshot;
  78         final ActorRef replyToActor;
  79         final ElectionTerm electionTerm;
  80         final Duration receiveTimeout;
  81         final String id;
  82         final ServerConfigurationPayload peerInformation;
  83
  84         Params(CaptureSnapshot captureSnapshot, ElectionTerm electionTerm, ActorRef replyToActor,
  85                 Duration receiveTimeout, String id, ServerConfigurationPayload peerInfo) {
  86             this.captureSnapshot = Preconditions.checkNotNull(captureSnapshot);
  87             this.electionTerm = Preconditions.checkNotNull(electionTerm);
  88             this.replyToActor = Preconditions.checkNotNull(replyToActor);
  89             this.receiveTimeout = Preconditions.checkNotNull(receiveTimeout);
  90             this.id = Preconditions.checkNotNull(id);
  91             this.peerInformation = peerInfo;
  92         }
  93     }
  94 }