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
  14 import com.google.common.base.Preconditions;
  15 import org.opendaylight.controller.cluster.datastore.identifiers.ShardManagerIdentifier;
  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.md.sal.dom.store.impl.InMemoryDOMDataStoreConfigProperties;
  24 import org.opendaylight.controller.sal.core.spi.data.DOMStore;
  25 import org.opendaylight.controller.sal.core.spi.data.DOMStoreReadTransaction;
  26 import org.opendaylight.controller.sal.core.spi.data.DOMStoreReadWriteTransaction;
  27 import org.opendaylight.controller.sal.core.spi.data.DOMStoreTransactionChain;
  28 import org.opendaylight.controller.sal.core.spi.data.DOMStoreWriteTransaction;
  29 import org.opendaylight.yangtools.concepts.ListenerRegistration;
  30 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
  31 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
  32 import org.opendaylight.yangtools.yang.model.api.SchemaContext;
  33 import org.opendaylight.yangtools.yang.model.api.SchemaContextListener;
  34 import org.slf4j.Logger;
  35 import org.slf4j.LoggerFactory;
  36
  37 /**
  38  *
  39  */
  40 public class DistributedDataStore implements DOMStore, SchemaContextListener, AutoCloseable {
  41
  42     private static final Logger LOG = LoggerFactory.getLogger(DistributedDataStore.class);
  43
  44     private final ActorContext actorContext;
  45
  46     private SchemaContext schemaContext;
  47
  48     public DistributedDataStore(ActorSystem actorSystem, String type, ClusterWrapper cluster,
  49             Configuration configuration, InMemoryDOMDataStoreConfigProperties dataStoreProperties) {
  50         Preconditions.checkNotNull(actorSystem, "actorSystem should not be null");
  51         Preconditions.checkNotNull(type, "type should not be null");
  52         Preconditions.checkNotNull(cluster, "cluster should not be null");
  53         Preconditions.checkNotNull(configuration, "configuration should not be null");
  54
  55
  56         String shardManagerId = ShardManagerIdentifier.builder().type(type).build().toString();
  57
  58         LOG.info("Creating ShardManager : {}", shardManagerId);
  59
  60         this.actorContext = new ActorContext(actorSystem, actorSystem
  61             .actorOf(ShardManager.props(type, cluster, configuration, dataStoreProperties),
  62                 shardManagerId ), cluster, configuration);
  63     }
  64
  65     public DistributedDataStore(ActorContext actorContext) {
  66         this.actorContext = Preconditions.checkNotNull(actorContext, "actorContext should not be null");
  67     }
  68
  69
  70     @SuppressWarnings("unchecked")
  71     @Override
  72     public <L extends AsyncDataChangeListener<YangInstanceIdentifier, NormalizedNode<?, ?>>>
  73                                               ListenerRegistration<L> registerChangeListener(
  74         YangInstanceIdentifier path, L listener,
  75         AsyncDataBroker.DataChangeScope scope) {
  76
  77         Preconditions.checkNotNull(path, "path should not be null");
  78         Preconditions.checkNotNull(listener, "listener should not be null");
  79
  80         LOG.debug("Registering listener: {} for path: {} scope: {}", listener, path, scope);
  81
  82         ActorRef dataChangeListenerActor = actorContext.getActorSystem().actorOf(
  83             DataChangeListener.props(schemaContext,listener,path ));
  84
  85         String shardName = ShardStrategyFactory.getStrategy(path).findShard(path);
  86
  87         Object result = actorContext.executeLocalShardOperation(shardName,
  88             new RegisterChangeListener(path, dataChangeListenerActor.path(), scope),
  89             ActorContext.ASK_DURATION);
  90
  91         if (result != null) {
  92             RegisterChangeListenerReply reply = (RegisterChangeListenerReply) result;
  93             return new DataChangeListenerRegistrationProxy(actorContext
  94                 .actorSelection(reply.getListenerRegistrationPath()), listener,
  95                 dataChangeListenerActor);
  96         }
  97
  98         LOG.debug(
  99             "No local shard for shardName {} was found so returning a noop registration",
 100             shardName);
 101
 102         return new NoOpDataChangeListenerRegistration(listener);
 103     }
 104
 105     @Override
 106     public DOMStoreTransactionChain createTransactionChain() {
 107         return new TransactionChainProxy(actorContext, schemaContext);
 108     }
 109
 110     @Override
 111     public DOMStoreReadTransaction newReadOnlyTransaction() {
 112         return new TransactionProxy(actorContext, TransactionProxy.TransactionType.READ_ONLY,
 113             schemaContext);
 114     }
 115
 116     @Override
 117     public DOMStoreWriteTransaction newWriteOnlyTransaction() {
 118         return new TransactionProxy(actorContext, TransactionProxy.TransactionType.WRITE_ONLY,
 119             schemaContext);
 120     }
 121
 122     @Override
 123     public DOMStoreReadWriteTransaction newReadWriteTransaction() {
 124         return new TransactionProxy(actorContext, TransactionProxy.TransactionType.READ_WRITE,
 125             schemaContext);
 126     }
 127
 128     @Override public void onGlobalContextUpdated(SchemaContext schemaContext) {
 129         this.schemaContext = schemaContext;
 130         actorContext.getShardManager().tell(
 131             new UpdateSchemaContext(schemaContext), null);
 132     }
 133
 134     @Override public void close() throws Exception {
 135         actorContext.shutdown();
 136
 137     }
 138 }