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.ActorSelection;
  13 import akka.actor.ActorSystem;
  14 import akka.util.Timeout;
  15 import org.opendaylight.controller.cluster.datastore.messages.FindPrimary;
  16 import org.opendaylight.controller.cluster.datastore.messages.PrimaryFound;
  17 import org.opendaylight.controller.cluster.datastore.messages.RegisterChangeListener;
  18 import org.opendaylight.controller.cluster.datastore.messages.RegisterChangeListenerReply;
  19 import org.opendaylight.controller.cluster.datastore.messages.UpdateSchemaContext;
  20 import org.opendaylight.controller.md.sal.common.api.data.AsyncDataBroker;
  21 import org.opendaylight.controller.md.sal.common.api.data.AsyncDataChangeListener;
  22 import org.opendaylight.controller.sal.core.spi.data.DOMStore;
  23 import org.opendaylight.controller.sal.core.spi.data.DOMStoreReadTransaction;
  24 import org.opendaylight.controller.sal.core.spi.data.DOMStoreReadWriteTransaction;
  25 import org.opendaylight.controller.sal.core.spi.data.DOMStoreTransactionChain;
  26 import org.opendaylight.controller.sal.core.spi.data.DOMStoreWriteTransaction;
  27 import org.opendaylight.yangtools.concepts.ListenerRegistration;
  28 import org.opendaylight.yangtools.yang.data.api.InstanceIdentifier;
  29 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
  30 import org.opendaylight.yangtools.yang.model.api.SchemaContext;
  31 import org.opendaylight.yangtools.yang.model.api.SchemaContextListener;
  32 import org.slf4j.Logger;
  33 import org.slf4j.LoggerFactory;
  34 import scala.concurrent.Await;
  35 import scala.concurrent.Future;
  36 import scala.concurrent.duration.Duration;
  37 import scala.concurrent.duration.FiniteDuration;
  38
  39 import java.util.concurrent.TimeUnit;
  40
  41 import static akka.pattern.Patterns.ask;
  42
  43 /**
  44  *
  45  */
  46 public class DistributedDataStore implements DOMStore, SchemaContextListener {
  47
  48     private static final Logger
  49         LOG = LoggerFactory.getLogger(DistributedDataStore.class);
  50
  51     final FiniteDuration ASK_DURATION = Duration.create(5, TimeUnit.SECONDS);
  52     final Duration AWAIT_DURATION = Duration.create(5, TimeUnit.SECONDS);
  53
  54     private final ActorRef shardManager;
  55     private final ActorSystem actorSystem;
  56     private final String type;
  57
  58
  59     public DistributedDataStore(ActorSystem actorSystem, String type) {
  60         this.actorSystem = actorSystem;
  61         this.type = type;
  62         shardManager = actorSystem.actorOf(ShardManager.props(type));
  63     }
  64
  65     @Override
  66     public <L extends AsyncDataChangeListener<InstanceIdentifier, NormalizedNode<?, ?>>> ListenerRegistration<L> registerChangeListener(
  67         InstanceIdentifier path, L listener,
  68         AsyncDataBroker.DataChangeScope scope) {
  69
  70         ActorSelection primary = findPrimary();
  71
  72         ActorRef dataChangeListenerActor = actorSystem.actorOf(DataChangeListener.props());
  73
  74         Object result =
  75             getResult(primary, new RegisterChangeListener(path, dataChangeListenerActor.path(),
  76                 AsyncDataBroker.DataChangeScope.BASE), ASK_DURATION);
  77
  78         RegisterChangeListenerReply reply = (RegisterChangeListenerReply) result;
  79         return new ListenerRegistrationProxy(reply.getListenerRegistrationPath());
  80     }
  81
  82     private ActorSelection findPrimary() {
  83         Object result = getResult(shardManager, new FindPrimary(Shard.DEFAULT_NAME), ASK_DURATION);
  84
  85         if(result instanceof PrimaryFound){
  86             PrimaryFound found = (PrimaryFound) result;
  87             LOG.error("Primary found {}", found.getPrimaryPath());
  88
  89             return actorSystem.actorSelection(found.getPrimaryPath());
  90         }
  91         throw new RuntimeException("primary was not found");
  92     }
  93
  94     private Object getResult(ActorRef actor, Object message, FiniteDuration duration){
  95         Future<Object> future =
  96             ask(actor, message, new Timeout(duration));
  97
  98         try {
  99             return Await.result(future, AWAIT_DURATION);
 100         } catch (Exception e) {
 101             throw new RuntimeException(e);
 102         }
 103     }
 104
 105     private Object getResult(ActorSelection actor, Object message, FiniteDuration duration){
 106         Future<Object> future =
 107             ask(actor, message, new Timeout(duration));
 108
 109         try {
 110             return Await.result(future, AWAIT_DURATION);
 111         } catch (Exception e) {
 112             throw new RuntimeException(e);
 113         }
 114     }
 115
 116
 117     @Override
 118     public DOMStoreTransactionChain createTransactionChain() {
 119         return new TransactionChainProxy();
 120     }
 121
 122     @Override
 123     public DOMStoreReadTransaction newReadOnlyTransaction() {
 124         return new TransactionProxy();
 125     }
 126
 127     @Override
 128     public DOMStoreWriteTransaction newWriteOnlyTransaction() {
 129         return new TransactionProxy();
 130     }
 131
 132     @Override
 133     public DOMStoreReadWriteTransaction newReadWriteTransaction() {
 134         return new TransactionProxy();
 135     }
 136
 137     @Override public void onGlobalContextUpdated(SchemaContext schemaContext) {
 138         shardManager.tell(new UpdateSchemaContext(schemaContext), null);
 139     }
 140 }