opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/datastore/Shard.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.event.Logging;
  13 import akka.event.LoggingAdapter;
  14 import akka.persistence.UntypedProcessor;
  15 import com.google.common.util.concurrent.ListeningExecutorService;
  16 import com.google.common.util.concurrent.MoreExecutors;
  17 import org.opendaylight.controller.cluster.datastore.messages.CreateTransactionChain;
  18 import org.opendaylight.controller.cluster.datastore.messages.CreateTransactionChainReply;
  19 import org.opendaylight.controller.cluster.datastore.messages.RegisterChangeListener;
  20 import org.opendaylight.controller.cluster.datastore.messages.RegisterChangeListenerReply;
  21 import org.opendaylight.controller.cluster.datastore.messages.UpdateSchemaContext;
  22 import org.opendaylight.controller.md.sal.common.api.data.AsyncDataChangeListener;
  23 import org.opendaylight.controller.md.sal.dom.store.impl.InMemoryDOMDataStore;
  24 import org.opendaylight.controller.sal.core.spi.data.DOMStoreTransactionChain;
  25 import org.opendaylight.yangtools.yang.data.api.InstanceIdentifier;
  26 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
  27
  28 import java.util.concurrent.Executors;
  29
  30 /**
  31  * A Shard represents a portion of the logical data tree
  32  * <p/>
  33  * Our Shard uses InMemoryDataStore as it's internal representation and delegates all requests it
  34  *
  35  */
  36 public class Shard extends UntypedProcessor {
  37
  38   ListeningExecutorService storeExecutor = MoreExecutors.listeningDecorator(Executors.newFixedThreadPool(2));
  39
  40   private final InMemoryDOMDataStore store = new InMemoryDOMDataStore("OPER", storeExecutor);
  41
  42   LoggingAdapter log = Logging.getLogger(getContext().system(), this);
  43
  44   @Override
  45   public void onReceive(Object message) throws Exception {
  46     if (message instanceof CreateTransactionChain) {
  47       createTransactionChain();
  48     } else if(message instanceof RegisterChangeListener){
  49       registerChangeListener((RegisterChangeListener) message);
  50     } else if(message instanceof UpdateSchemaContext){
  51       updateSchemaContext((UpdateSchemaContext) message);
  52     }
  53   }
  54
  55   private void updateSchemaContext(UpdateSchemaContext message) {
  56     store.onGlobalContextUpdated(message.getSchemaContext());
  57   }
  58
  59   private void registerChangeListener(RegisterChangeListener registerChangeListener) {
  60     org.opendaylight.yangtools.concepts.ListenerRegistration<AsyncDataChangeListener<InstanceIdentifier, NormalizedNode<?, ?>>> registration =
  61             store.registerChangeListener(registerChangeListener.getPath(), registerChangeListener.getListener(), registerChangeListener.getScope());
  62     ActorRef listenerRegistration = getContext().actorOf(ListenerRegistration.props(registration));
  63     getSender().tell(new RegisterChangeListenerReply(listenerRegistration.path()), getSelf());
  64   }
  65
  66   private void createTransactionChain() {
  67     DOMStoreTransactionChain chain = store.createTransactionChain();
  68     ActorRef transactionChain = getContext().actorOf(ShardTransactionChain.props(chain));
  69     getSender().tell(new CreateTransactionChainReply(transactionChain.path()), getSelf());
  70   }
  71 }