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 com.google.common.base.Throwables;
  15 import java.util.List;
  16 import org.opendaylight.controller.cluster.access.concepts.MemberName;
  17 import org.opendaylight.controller.cluster.datastore.identifiers.ShardIdentifier;
  18 import org.opendaylight.controller.cluster.raft.RaftState;
  19 import org.opendaylight.controller.md.sal.common.util.jmx.AbstractMXBean;
  20 import org.slf4j.Logger;
  21 import org.slf4j.LoggerFactory;
  22 import scala.concurrent.Await;
  23 import scala.concurrent.duration.Duration;
  24
  25 final class ShardManagerInfo extends AbstractMXBean implements ShardManagerInfoMBean {
  26
  27     public static final String JMX_CATEGORY_SHARD_MANAGER = "ShardManager";
  28
  29     private static final Logger LOG = LoggerFactory.getLogger(ShardManagerInfo.class);
  30     private static final long ASK_TIMEOUT_MILLIS = 5000;
  31
  32     private final ActorRef shardManager;
  33     private final MemberName memberName;
  34
  35     private volatile boolean syncStatus = false;
  36
  37
  38     ShardManagerInfo(final ActorRef shardManager, final MemberName memberName, final String name,
  39         final String mxBeanType) {
  40         super(name, mxBeanType, JMX_CATEGORY_SHARD_MANAGER);
  41         this.shardManager = Preconditions.checkNotNull(shardManager);
  42         this.memberName = Preconditions.checkNotNull(memberName);
  43     }
  44
  45     @SuppressWarnings("unchecked")
  46     @Override
  47     public List<String> getLocalShards() {
  48         try {
  49             return (List<String>) Await.result(
  50                 Patterns.ask(shardManager, GetLocalShardIds.INSTANCE, ASK_TIMEOUT_MILLIS), Duration.Inf());
  51         } catch (Exception e) {
  52             throw Throwables.propagate(e);
  53         }
  54     }
  55
  56     @Override
  57     public boolean getSyncStatus() {
  58         return syncStatus;
  59     }
  60
  61     void setSyncStatus(boolean syncStatus) {
  62         this.syncStatus = syncStatus;
  63     }
  64
  65     @Override
  66     public String getMemberName() {
  67         return memberName.getName();
  68     }
  69
  70     private void requestSwitchShardState(final ShardIdentifier shardId, final String newState, final long term) {
  71         // Validates strings argument
  72         final RaftState state = RaftState.valueOf(newState);
  73
  74         // Leader and Follower are the only states to which we can switch externally
  75         switch (state) {
  76             case Follower:
  77             case Leader:
  78                 try {
  79                     Await.result(Patterns.ask(shardManager, new SwitchShardBehavior(shardId, state, term),
  80                         ASK_TIMEOUT_MILLIS), Duration.Inf());
  81                 } catch (Exception e) {
  82                     throw Throwables.propagate(e);
  83                 }
  84                 break;
  85             case Candidate:
  86             case IsolatedLeader:
  87             default:
  88                 throw new IllegalArgumentException("Illegal target state " + state);
  89         }
  90     }
  91
  92     @Override
  93     public void switchAllLocalShardsState(String newState, long term) {
  94         LOG.info("switchAllLocalShardsState called newState = {}, term = {}", newState, term);
  95         requestSwitchShardState(null, newState, term);
  96     }
  97
  98     @Override
  99     public void switchShardState(String shardId, String newState, long term) {
 100         final ShardIdentifier identifier = ShardIdentifier.builder().fromShardIdString(
 101                 Preconditions.checkNotNull(shardId, "Shard id may not be null")).build();
 102         LOG.info("switchShardState called shardName = {}, newState = {}, term = {}", shardId, newState, term);
 103         requestSwitchShardState(identifier, newState, term);
 104     }
 105 }