opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/datastore/ShardTransactionChain.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 com.google.common.base.Preconditions;
  12 import akka.actor.ActorRef;
  13 import akka.actor.Props;
  14 import akka.japi.Creator;
  15 import org.opendaylight.controller.cluster.common.actor.AbstractUntypedActor;
  16 import org.opendaylight.controller.cluster.datastore.jmx.mbeans.shard.ShardStats;
  17 import org.opendaylight.controller.cluster.datastore.messages.CloseTransactionChain;
  18 import org.opendaylight.controller.cluster.datastore.messages.CloseTransactionChainReply;
  19 import org.opendaylight.controller.cluster.datastore.messages.CreateTransaction;
  20 import org.opendaylight.controller.cluster.datastore.messages.CreateTransactionReply;
  21 import org.opendaylight.yangtools.yang.model.api.SchemaContext;
  22
  23 /**
  24  * The ShardTransactionChain Actor represents a remote TransactionChain
  25  */
  26 public class ShardTransactionChain extends AbstractUntypedActor {
  27
  28     private final ShardDataTreeTransactionChain chain;
  29     private final DatastoreContext datastoreContext;
  30     private final ShardStats shardStats;
  31
  32     public ShardTransactionChain(ShardDataTreeTransactionChain chain, DatastoreContext datastoreContext,
  33             ShardStats shardStats) {
  34         this.chain = Preconditions.checkNotNull(chain);
  35         this.datastoreContext = datastoreContext;
  36         this.shardStats = shardStats;
  37     }
  38
  39     @Override
  40     public void handleReceive(Object message) throws Exception {
  41         if (message.getClass().equals(CreateTransaction.SERIALIZABLE_CLASS)) {
  42             CreateTransaction createTransaction = CreateTransaction.fromSerializable( message);
  43             createTransaction(createTransaction);
  44         } else if (message.getClass().equals(CloseTransactionChain.SERIALIZABLE_CLASS)) {
  45             chain.close();
  46             getSender().tell(CloseTransactionChainReply.INSTANCE.toSerializable(), getSelf());
  47         }else{
  48             unknownMessage(message);
  49         }
  50     }
  51
  52     private ActorRef getShardActor(){
  53         return getContext().parent();
  54     }
  55
  56     private ActorRef createTypedTransactionActor(CreateTransaction createTransaction) {
  57         String transactionName = "shard-" + createTransaction.getTransactionId();
  58
  59         final TransactionType type = TransactionType.fromInt(createTransaction.getTransactionType());
  60         final AbstractShardDataTreeTransaction<?> transaction;
  61         switch (type) {
  62         case READ_ONLY:
  63             transaction = chain.newReadOnlyTransaction(transactionName);
  64             break;
  65         case READ_WRITE:
  66         case WRITE_ONLY:
  67             transaction = chain.newReadWriteTransaction(transactionName);
  68             break;
  69         default:
  70             throw new IllegalArgumentException("Unhandled transaction type " + type);
  71         }
  72
  73         return getContext().actorOf(
  74             ShardTransaction.props(type, transaction, getShardActor(),
  75                     datastoreContext, shardStats, createTransaction.getTransactionId(),
  76                     createTransaction.getVersion()), transactionName);
  77     }
  78
  79     private void createTransaction(CreateTransaction createTransaction) {
  80
  81         ActorRef transactionActor = createTypedTransactionActor(createTransaction);
  82         getSender().tell(new CreateTransactionReply(transactionActor.path().toString(),
  83                 createTransaction.getTransactionId()).toSerializable(), getSelf());
  84     }
  85
  86     public static Props props(ShardDataTreeTransactionChain chain, SchemaContext schemaContext,
  87         DatastoreContext datastoreContext, ShardStats shardStats) {
  88         return Props.create(new ShardTransactionChainCreator(chain, datastoreContext, shardStats));
  89     }
  90
  91     private static class ShardTransactionChainCreator implements Creator<ShardTransactionChain> {
  92         private static final long serialVersionUID = 1L;
  93
  94         final ShardDataTreeTransactionChain chain;
  95         final DatastoreContext datastoreContext;
  96         final ShardStats shardStats;
  97
  98         ShardTransactionChainCreator(ShardDataTreeTransactionChain chain, DatastoreContext datastoreContext,
  99                 ShardStats shardStats) {
 100             this.chain = chain;
 101             this.datastoreContext = datastoreContext;
 102             this.shardStats = shardStats;
 103         }
 104
 105         @Override
 106         public ShardTransactionChain create() throws Exception {
 107             return new ShardTransactionChain(chain, datastoreContext, shardStats);
 108         }
 109     }
 110 }