opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/datastore/shardmanager/ShardManagerInfo.java

   1 /*
   2  * Copyright (c) 2014 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
   9 package org.opendaylight.controller.cluster.datastore.shardmanager;
  10
  11 import akka.actor.ActorRef;
  12 import akka.pattern.Patterns;
  13 import com.google.common.base.Preconditions;
  14 import java.util.List;
  15 import org.opendaylight.controller.cluster.access.concepts.MemberName;
  16 import org.opendaylight.controller.cluster.datastore.identifiers.ShardIdentifier;
  17 import org.opendaylight.controller.cluster.raft.RaftState;
  18 import org.opendaylight.controller.md.sal.common.util.jmx.AbstractMXBean;
  19 import org.slf4j.Logger;
  20 import org.slf4j.LoggerFactory;
  21 import scala.concurrent.Await;
  22 import scala.concurrent.duration.Duration;
  23
  24 final class ShardManagerInfo extends AbstractMXBean implements ShardManagerInfoMBean {
  25
  26     public static final String JMX_CATEGORY_SHARD_MANAGER = "ShardManager";
  27
  28     private static final Logger LOG = LoggerFactory.getLogger(ShardManagerInfo.class);
  29     private static final long ASK_TIMEOUT_MILLIS = 5000;
  30
  31     private final ActorRef shardManager;
  32     private final MemberName memberName;
  33
  34     private volatile boolean syncStatus = false;
  35
  36
  37     ShardManagerInfo(final ActorRef shardManager, final MemberName memberName, final String name,
  38         final String mxBeanType) {
  39         super(name, mxBeanType, JMX_CATEGORY_SHARD_MANAGER);
  40         this.shardManager = Preconditions.checkNotNull(shardManager);
  41         this.memberName = Preconditions.checkNotNull(memberName);
  42     }
  43
  44     @SuppressWarnings({"unchecked", "checkstyle:IllegalCatch"})
  45     @Override
  46     public List<String> getLocalShards() {
  47         try {
  48             return (List<String>) Await.result(
  49                 Patterns.ask(shardManager, GetLocalShardIds.INSTANCE, ASK_TIMEOUT_MILLIS), Duration.Inf());
  50         } catch (RuntimeException e) {
  51             throw e;
  52         } catch (Exception e) {
  53             throw new RuntimeException(e);
  54         }
  55     }
  56
  57     @Override
  58     public boolean getSyncStatus() {
  59         return syncStatus;
  60     }
  61
  62     void setSyncStatus(final boolean syncStatus) {
  63         this.syncStatus = syncStatus;
  64     }
  65
  66     @Override
  67     public String getMemberName() {
  68         return memberName.getName();
  69     }
  70
  71     @SuppressWarnings("checkstyle:IllegalCatch")
  72     private void requestSwitchShardState(final ShardIdentifier shardId, final String newState, final long term) {
  73         // Validates strings argument
  74         final RaftState state = RaftState.valueOf(newState);
  75
  76         // Leader and Follower are the only states to which we can switch externally
  77         switch (state) {
  78             case Follower:
  79             case Leader:
  80                 try {
  81                     Await.result(Patterns.ask(shardManager, new SwitchShardBehavior(shardId, state, term),
  82                         ASK_TIMEOUT_MILLIS), Duration.Inf());
  83                 } catch (RuntimeException e) {
  84                     throw e;
  85                 } catch (Exception e) {
  86                     throw new RuntimeException(e);
  87                 }
  88                 break;
  89             case Candidate:
  90             case IsolatedLeader:
  91             default:
  92                 throw new IllegalArgumentException("Illegal target state " + state);
  93         }
  94     }
  95
  96     @Override
  97     public void switchAllLocalShardsState(final String newState, final long term) {
  98         LOG.info("switchAllLocalShardsState called newState = {}, term = {}", newState, term);
  99         requestSwitchShardState(null, newState, term);
 100     }
 101
 102     @Override
 103     public void switchShardState(final String shardId, final String newState, final long term) {
 104         final ShardIdentifier identifier = ShardIdentifier.fromShardIdString(shardId);
 105         LOG.info("switchShardState called shardName = {}, newState = {}, term = {}", shardId, newState, term);
 106         requestSwitchShardState(identifier, newState, term);
 107     }
 108 }