opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/datastore/DistributedDataStore.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;
  10
  11 import java.util.concurrent.Executors;
  12
  13 import akka.actor.ActorRef;
  14 import akka.actor.ActorSystem;
  15
  16 import org.opendaylight.controller.cluster.datastore.messages.RegisterChangeListener;
  17 import org.opendaylight.controller.cluster.datastore.messages.RegisterChangeListenerReply;
  18 import org.opendaylight.controller.cluster.datastore.messages.UpdateSchemaContext;
  19 import org.opendaylight.controller.cluster.datastore.shardstrategy.ShardStrategyFactory;
  20 import org.opendaylight.controller.cluster.datastore.utils.ActorContext;
  21 import org.opendaylight.controller.md.sal.common.api.data.AsyncDataBroker;
  22 import org.opendaylight.controller.md.sal.common.api.data.AsyncDataChangeListener;
  23 import org.opendaylight.controller.sal.core.spi.data.DOMStore;
  24 import org.opendaylight.controller.sal.core.spi.data.DOMStoreReadTransaction;
  25 import org.opendaylight.controller.sal.core.spi.data.DOMStoreReadWriteTransaction;
  26 import org.opendaylight.controller.sal.core.spi.data.DOMStoreTransactionChain;
  27 import org.opendaylight.controller.sal.core.spi.data.DOMStoreWriteTransaction;
  28 import org.opendaylight.yangtools.concepts.ListenerRegistration;
  29 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
  30 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
  31 import org.opendaylight.yangtools.yang.model.api.SchemaContext;
  32 import org.opendaylight.yangtools.yang.model.api.SchemaContextListener;
  33 import org.slf4j.Logger;
  34 import org.slf4j.LoggerFactory;
  35
  36 import com.google.common.util.concurrent.ListeningExecutorService;
  37 import com.google.common.util.concurrent.MoreExecutors;
  38
  39 /**
  40  *
  41  */
  42 public class DistributedDataStore implements DOMStore, SchemaContextListener, AutoCloseable {
  43
  44     private static final Logger
  45         LOG = LoggerFactory.getLogger(DistributedDataStore.class);
  46
  47     private static final int DEFAULT_EXECUTOR_POOL_SIZE = 10;
  48
  49     private final String type;
  50     private final ActorContext actorContext;
  51
  52     private SchemaContext schemaContext;
  53
  54
  55
  56     /**
  57      * Executor used to run FutureTask's
  58      *
  59      * This is typically used when we need to make a request to an actor and
  60      * wait for it's response and the consumer needs to be provided a Future.
  61      *
  62      * FIXME : Make the thread pool size configurable.
  63      */
  64     private final ListeningExecutorService executor =
  65         MoreExecutors.listeningDecorator(Executors.newFixedThreadPool(DEFAULT_EXECUTOR_POOL_SIZE));
  66
  67     public DistributedDataStore(ActorSystem actorSystem, String type, ClusterWrapper cluster, Configuration configuration) {
  68         this(new ActorContext(actorSystem, actorSystem
  69             .actorOf(ShardManager.props(type, cluster, configuration),
  70                 "shardmanager-" + type), cluster, configuration), type);
  71     }
  72
  73     public DistributedDataStore(ActorContext actorContext, String type) {
  74         this.type = type;
  75         this.actorContext = actorContext;
  76     }
  77
  78
  79     @Override
  80     public <L extends AsyncDataChangeListener<YangInstanceIdentifier, NormalizedNode<?, ?>>> ListenerRegistration<L> registerChangeListener(
  81         YangInstanceIdentifier path, L listener,
  82         AsyncDataBroker.DataChangeScope scope) {
  83
  84         ActorRef dataChangeListenerActor = actorContext.getActorSystem().actorOf(
  85             DataChangeListener.props(schemaContext,listener,path ));
  86
  87         String shardName = ShardStrategyFactory.getStrategy(path).findShard(path);
  88
  89         Object result = actorContext.executeLocalShardOperation(shardName,
  90             new RegisterChangeListener(path, dataChangeListenerActor.path(),
  91                 scope).toSerializable(),
  92             ActorContext.ASK_DURATION
  93         );
  94
  95         if (result != null) {
  96             RegisterChangeListenerReply reply = RegisterChangeListenerReply
  97                 .fromSerializable(actorContext.getActorSystem(), result);
  98             return new DataChangeListenerRegistrationProxy(actorContext
  99                 .actorSelection(reply.getListenerRegistrationPath()), listener,
 100                 dataChangeListenerActor);
 101         }
 102
 103         LOG.debug(
 104             "No local shard for shardName {} was found so returning a noop registration",
 105             shardName);
 106         return new NoOpDataChangeListenerRegistration(listener);
 107     }
 108
 109
 110
 111
 112
 113     @Override
 114     public DOMStoreTransactionChain createTransactionChain() {
 115         return new TransactionChainProxy(actorContext, executor, schemaContext);
 116     }
 117
 118     @Override
 119     public DOMStoreReadTransaction newReadOnlyTransaction() {
 120         return new TransactionProxy(actorContext, TransactionProxy.TransactionType.READ_ONLY,
 121             executor, schemaContext);
 122     }
 123
 124     @Override
 125     public DOMStoreWriteTransaction newWriteOnlyTransaction() {
 126         return new TransactionProxy(actorContext, TransactionProxy.TransactionType.WRITE_ONLY,
 127             executor, schemaContext);
 128     }
 129
 130     @Override
 131     public DOMStoreReadWriteTransaction newReadWriteTransaction() {
 132         return new TransactionProxy(actorContext, TransactionProxy.TransactionType.READ_WRITE,
 133             executor, schemaContext);
 134     }
 135
 136     @Override public void onGlobalContextUpdated(SchemaContext schemaContext) {
 137         this.schemaContext = schemaContext;
 138         actorContext.getShardManager().tell(
 139             new UpdateSchemaContext(schemaContext), null);
 140     }
 141
 142     @Override public void close() throws Exception {
 143         actorContext.shutdown();
 144
 145     }
 146 }