Initial implementation of ListenerRegistration actor and all related messages
[controller.git] / 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 }

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