opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/datastore/jmx/mbeans/shard/ShardDataTreeListenerInfoMXBeanImpl.java

   1 /*
   2  * Copyright (c) 2017 Inocybe Technologies 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.jmx.mbeans.shard;
   9
  10 import akka.actor.ActorRef;
  11 import akka.actor.ActorSelection;
  12 import akka.dispatch.Futures;
  13 import akka.pattern.Patterns;
  14 import akka.util.Timeout;
  15 import com.google.common.base.Preconditions;
  16 import com.google.common.base.Throwables;
  17 import java.util.ArrayList;
  18 import java.util.Collection;
  19 import java.util.List;
  20 import java.util.concurrent.TimeUnit;
  21 import org.opendaylight.controller.cluster.datastore.messages.DataTreeListenerInfo;
  22 import org.opendaylight.controller.cluster.datastore.messages.GetInfo;
  23 import org.opendaylight.controller.cluster.datastore.messages.OnDemandShardState;
  24 import org.opendaylight.controller.md.sal.common.util.jmx.AbstractMXBean;
  25 import scala.concurrent.Await;
  26 import scala.concurrent.ExecutionContext;
  27 import scala.concurrent.Future;
  28
  29 /**
  30  * Implementation of ShardDataTreeListenerInfoMXBean.
  31  *
  32  * @author Thomas Pantelis
  33  */
  34 public class ShardDataTreeListenerInfoMXBeanImpl extends AbstractMXBean implements ShardDataTreeListenerInfoMXBean {
  35     private static final String JMX_CATEGORY = "ShardDataTreeListenerInfo";
  36
  37     private final OnDemandShardStateCache stateCache;
  38
  39     public ShardDataTreeListenerInfoMXBeanImpl(final String shardName, final String mxBeanType,
  40             final ActorRef shardActor) {
  41         super(shardName, mxBeanType, JMX_CATEGORY);
  42         stateCache = new OnDemandShardStateCache(shardName, Preconditions.checkNotNull(shardActor));
  43     }
  44
  45     @Override
  46     public List<DataTreeListenerInfo> getDataTreeChangeListenerInfo() {
  47         return getListenerActorsInfo(getState().getTreeChangeListenerActors());
  48     }
  49
  50     @SuppressWarnings("checkstyle:IllegalCatch")
  51     private OnDemandShardState getState() {
  52         try {
  53             return stateCache.get();
  54         } catch (Exception e) {
  55             Throwables.throwIfUnchecked(e);
  56             throw new RuntimeException(e);
  57         }
  58     }
  59
  60     @SuppressWarnings("checkstyle:IllegalCatch")
  61     private List<DataTreeListenerInfo> getListenerActorsInfo(Collection<ActorSelection> actors) {
  62         final Timeout timeout = new Timeout(20, TimeUnit.SECONDS);
  63         final List<Future<Object>> futureList = new ArrayList<>(actors.size());
  64         for (ActorSelection actor: actors) {
  65             futureList.add(Patterns.ask(actor, GetInfo.INSTANCE, timeout));
  66         }
  67
  68         try {
  69             final List<DataTreeListenerInfo> listenerInfoList = new ArrayList<>();
  70             Await.result(Futures.sequence(futureList, ExecutionContext.Implicits$.MODULE$.global()),
  71                     timeout.duration()).forEach(obj -> listenerInfoList.add((DataTreeListenerInfo) obj));
  72             return listenerInfoList;
  73         } catch (Exception e) {
  74             throw new RuntimeException(e);
  75         }
  76     }
  77 }