opendaylight/md-sal/sal-clustering-commons/src/main/java/org/opendaylight/controller/cluster/common/actor/QuarantinedMonitorActor.java

   1 /*
   2  * Copyright (c) 2015 Huawei Technologies Co., Ltd. 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
   9 package org.opendaylight.controller.cluster.common.actor;
  10
  11 import akka.actor.Props;
  12 import akka.actor.UntypedActor;
  13 import akka.japi.Creator;
  14 import akka.japi.Effect;
  15 import akka.remote.AssociationErrorEvent;
  16 import akka.remote.InvalidAssociation;
  17 import akka.remote.RemotingLifecycleEvent;
  18 import org.slf4j.Logger;
  19 import org.slf4j.LoggerFactory;
  20
  21 /**
  22  * This class listens to Akka RemotingLifecycleEvent events to detect when this node has been
  23  * quarantined by another. Once this node gets quarantined, restart the ActorSystem to allow this
  24  * node to rejoin the cluster.
  25  *
  26  * @author Gary Wu <gary.wu1@huawei.com>
  27  *
  28  */
  29 public class QuarantinedMonitorActor extends UntypedActor {
  30
  31     private final Logger LOG = LoggerFactory.getLogger(QuarantinedMonitorActor.class);
  32
  33     public static final String ADDRESS = "quarantined-monitor";
  34
  35     private final Effect callback;
  36
  37     protected QuarantinedMonitorActor(Effect callback) {
  38         this.callback = callback;
  39
  40         LOG.debug("Created QuarantinedMonitorActor");
  41
  42         getContext().system().eventStream().subscribe(getSelf(), RemotingLifecycleEvent.class);
  43     }
  44
  45     @Override
  46     public void postStop() {
  47         LOG.debug("Stopping QuarantinedMonitorActor");
  48     }
  49
  50     @Override
  51     public void onReceive(Object message) throws Exception {
  52         final String messageType = message.getClass().getSimpleName();
  53         LOG.trace("onReceive {} {}", messageType, message);
  54
  55         // check to see if we got quarantined by another node
  56
  57         // TODO: follow https://github.com/akka/akka/issues/18758 to see if Akka adds a named
  58         // exception for quarantine detection
  59         if (message instanceof AssociationErrorEvent) {
  60             AssociationErrorEvent event = (AssociationErrorEvent) message;
  61             Throwable cause = event.getCause();
  62             if (cause instanceof InvalidAssociation) {
  63                 Throwable cause2 = ((InvalidAssociation) cause).getCause();
  64                 if (cause2.getMessage().contains("quarantined this system")) {
  65                     LOG.warn("Got quarantined by {}", event.getRemoteAddress());
  66
  67                     // execute the callback
  68                     callback.apply();
  69                 } else {
  70                     LOG.debug("received AssociationErrorEvent, cause: InvalidAssociation", cause2);
  71                 }
  72             } else {
  73                 LOG.debug("received AssociationErrorEvent", cause);
  74             }
  75         }
  76     }
  77
  78     public static Props props(final Effect callback) {
  79         return Props.create(new Creator<QuarantinedMonitorActor>() {
  80             private static final long serialVersionUID = 1L;
  81
  82             @Override
  83             public QuarantinedMonitorActor create() throws Exception {
  84                 return new QuarantinedMonitorActor(callback);
  85             }
  86         });
  87     }
  88
  89 }