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 akka.actor.ActorRef;
  12 import akka.actor.ActorSystem;
  13 import org.opendaylight.controller.cluster.datastore.messages.RegisterChangeListener;
  14 import org.opendaylight.controller.cluster.datastore.messages.RegisterChangeListenerReply;
  15 import org.opendaylight.controller.cluster.datastore.messages.UpdateSchemaContext;
  16 import org.opendaylight.controller.cluster.datastore.utils.ActorContext;
  17 import org.opendaylight.controller.md.sal.common.api.data.AsyncDataBroker;
  18 import org.opendaylight.controller.md.sal.common.api.data.AsyncDataChangeListener;
  19 import org.opendaylight.controller.sal.core.spi.data.DOMStore;
  20 import org.opendaylight.controller.sal.core.spi.data.DOMStoreReadTransaction;
  21 import org.opendaylight.controller.sal.core.spi.data.DOMStoreReadWriteTransaction;
  22 import org.opendaylight.controller.sal.core.spi.data.DOMStoreTransactionChain;
  23 import org.opendaylight.controller.sal.core.spi.data.DOMStoreWriteTransaction;
  24 import org.opendaylight.yangtools.concepts.ListenerRegistration;
  25 import org.opendaylight.yangtools.yang.data.api.InstanceIdentifier;
  26 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
  27 import org.opendaylight.yangtools.yang.model.api.SchemaContext;
  28 import org.opendaylight.yangtools.yang.model.api.SchemaContextListener;
  29 import org.slf4j.Logger;
  30 import org.slf4j.LoggerFactory;
  31
  32 import java.util.concurrent.ExecutorService;
  33 import java.util.concurrent.Executors;
  34
  35 /**
  36  *
  37  */
  38 public class DistributedDataStore implements DOMStore, SchemaContextListener, AutoCloseable {
  39
  40     private static final Logger
  41         LOG = LoggerFactory.getLogger(DistributedDataStore.class);
  42
  43
  44     private final String type;
  45     private final ActorContext actorContext;
  46
  47
  48     /**
  49      * Executor used to run FutureTask's
  50      *
  51      * This is typically used when we need to make a request to an actor and
  52      * wait for it's response and the consumer needs to be provided a Future.
  53      *
  54      * FIXME : Make the thread pool configurable
  55      */
  56     private final ExecutorService executor =
  57         Executors.newFixedThreadPool(10);
  58
  59     public DistributedDataStore(ActorSystem actorSystem, String type) {
  60         this(new ActorContext(actorSystem, actorSystem.actorOf(ShardManager.props(type), "shardmanager-" + type)), type);
  61     }
  62
  63     public DistributedDataStore(ActorContext actorContext, String type) {
  64         this.type = type;
  65         this.actorContext = actorContext;
  66     }
  67
  68
  69     @Override
  70     public <L extends AsyncDataChangeListener<InstanceIdentifier, NormalizedNode<?, ?>>> ListenerRegistration<L> registerChangeListener(
  71         InstanceIdentifier path, L listener,
  72         AsyncDataBroker.DataChangeScope scope) {
  73
  74         ActorRef dataChangeListenerActor = actorContext.getActorSystem().actorOf(
  75             DataChangeListener.props(listener));
  76
  77         Object result = actorContext.executeShardOperation(Shard.DEFAULT_NAME,
  78             new RegisterChangeListener(path, dataChangeListenerActor.path(),
  79                 AsyncDataBroker.DataChangeScope.BASE),
  80             ActorContext.ASK_DURATION
  81         );
  82
  83         RegisterChangeListenerReply reply = (RegisterChangeListenerReply) result;
  84         return new DataChangeListenerRegistrationProxy(actorContext.actorSelection(reply.getListenerRegistrationPath()), listener, dataChangeListenerActor);
  85     }
  86
  87
  88
  89     @Override
  90     public DOMStoreTransactionChain createTransactionChain() {
  91         return new TransactionChainProxy(actorContext, executor);
  92     }
  93
  94     @Override
  95     public DOMStoreReadTransaction newReadOnlyTransaction() {
  96         return new TransactionProxy(actorContext, TransactionProxy.TransactionType.READ_ONLY,
  97             executor);
  98     }
  99
 100     @Override
 101     public DOMStoreWriteTransaction newWriteOnlyTransaction() {
 102         return new TransactionProxy(actorContext, TransactionProxy.TransactionType.WRITE_ONLY,
 103             executor);
 104     }
 105
 106     @Override
 107     public DOMStoreReadWriteTransaction newReadWriteTransaction() {
 108         return new TransactionProxy(actorContext, TransactionProxy.TransactionType.READ_WRITE,
 109             executor);
 110     }
 111
 112     @Override public void onGlobalContextUpdated(SchemaContext schemaContext) {
 113         actorContext.getShardManager().tell(
 114             new UpdateSchemaContext(schemaContext), null);
 115     }
 116
 117     @Override public void close() throws Exception {
 118         actorContext.shutdown();
 119
 120     }
 121 }