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 static java.util.Objects.requireNonNull;
  11
  12 import akka.actor.ActorRef;
  13 import akka.actor.ActorSelection;
  14 import akka.dispatch.Futures;
  15 import akka.pattern.Patterns;
  16 import akka.util.Timeout;
  17 import com.google.common.base.Throwables;
  18 import java.util.ArrayList;
  19 import java.util.Collection;
  20 import java.util.List;
  21 import java.util.concurrent.TimeUnit;
  22 import org.opendaylight.controller.cluster.datastore.messages.DataTreeListenerInfo;
  23 import org.opendaylight.controller.cluster.datastore.messages.GetInfo;
  24 import org.opendaylight.controller.cluster.datastore.messages.OnDemandShardState;
  25 import org.opendaylight.controller.md.sal.common.util.jmx.AbstractMXBean;
  26 import scala.concurrent.Await;
  27 import scala.concurrent.ExecutionContext;
  28 import scala.concurrent.Future;
  29
  30 /**
  31  * Implementation of ShardDataTreeListenerInfoMXBean.
  32  *
  33  * @author Thomas Pantelis
  34  */
  35 public class ShardDataTreeListenerInfoMXBeanImpl extends AbstractMXBean implements ShardDataTreeListenerInfoMXBean {
  36     private static final String JMX_CATEGORY = "ShardDataTreeListenerInfo";
  37
  38     private final OnDemandShardStateCache stateCache;
  39
  40     public ShardDataTreeListenerInfoMXBeanImpl(final String shardName, final String mxBeanType,
  41             final ActorRef shardActor) {
  42         super(shardName, mxBeanType, JMX_CATEGORY);
  43         stateCache = new OnDemandShardStateCache(shardName, requireNonNull(shardActor));
  44     }
  45
  46     @Override
  47     public List<DataTreeListenerInfo> getDataTreeChangeListenerInfo() {
  48         return getListenerActorsInfo(getState().getTreeChangeListenerActors());
  49     }
  50
  51     @SuppressWarnings("checkstyle:IllegalCatch")
  52     private OnDemandShardState getState() {
  53         try {
  54             return stateCache.get();
  55         } catch (Exception e) {
  56             Throwables.throwIfUnchecked(e);
  57             throw new RuntimeException(e);
  58         }
  59     }
  60
  61     @SuppressWarnings("checkstyle:IllegalCatch")
  62     private static List<DataTreeListenerInfo> getListenerActorsInfo(Collection<ActorSelection> actors) {
  63         final Timeout timeout = new Timeout(20, TimeUnit.SECONDS);
  64         final List<Future<Object>> futureList = new ArrayList<>(actors.size());
  65         for (ActorSelection actor: actors) {
  66             futureList.add(Patterns.ask(actor, GetInfo.INSTANCE, timeout));
  67         }
  68
  69         try {
  70             final List<DataTreeListenerInfo> listenerInfoList = new ArrayList<>();
  71             Await.result(Futures.sequence(futureList, ExecutionContext.Implicits$.MODULE$.global()),
  72                     timeout.duration()).forEach(obj -> listenerInfoList.add((DataTreeListenerInfo) obj));
  73             return listenerInfoList;
  74         } catch (Exception e) {
  75             throw new RuntimeException(e);
  76         }
  77     }
  78 }