opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/datastore/LocalTransactionFactoryImpl.java

   1 /*
   2  * Copyright (c) 2015 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 package org.opendaylight.controller.cluster.datastore;
   9
  10 import akka.actor.ActorSelection;
  11 import com.google.common.base.Preconditions;
  12 import org.opendaylight.controller.cluster.datastore.identifiers.TransactionIdentifier;
  13 import org.opendaylight.controller.cluster.datastore.utils.ActorContext;
  14 import org.opendaylight.controller.sal.core.spi.data.DOMStoreReadWriteTransaction;
  15 import org.opendaylight.controller.sal.core.spi.data.DOMStoreThreePhaseCommitCohort;
  16 import org.opendaylight.controller.sal.core.spi.data.SnapshotBackedTransactions;
  17 import org.opendaylight.controller.sal.core.spi.data.SnapshotBackedWriteTransaction;
  18 import org.opendaylight.controller.sal.core.spi.data.SnapshotBackedWriteTransaction.TransactionReadyPrototype;
  19 import org.opendaylight.yangtools.yang.data.api.schema.tree.DataTree;
  20 import org.opendaylight.yangtools.yang.data.api.schema.tree.DataTreeModification;
  21 import org.slf4j.Logger;
  22 import org.slf4j.LoggerFactory;
  23
  24 /**
  25  * {@link LocalTransactionFactory} for instantiating backing transactions which are
  26  * disconnected from each other, ie not chained. These are used by {@link AbstractTransactionContextFactory}
  27  * to instantiate transactions on shards which are co-located with the shard leader.
  28  */
  29 final class LocalTransactionFactoryImpl extends TransactionReadyPrototype<TransactionIdentifier>
  30         implements LocalTransactionFactory {
  31
  32     private static final Logger LOG = LoggerFactory.getLogger(LocalTransactionFactoryImpl.class);
  33     private final ActorSelection leader;
  34     private final DataTree dataTree;
  35     private final ActorContext actorContext;
  36
  37     LocalTransactionFactoryImpl(final ActorContext actorContext, final ActorSelection leader, final DataTree dataTree) {
  38         this.leader = Preconditions.checkNotNull(leader);
  39         this.dataTree = Preconditions.checkNotNull(dataTree);
  40         this.actorContext = actorContext;
  41     }
  42
  43     DataTree getDataTree() {
  44         return dataTree;
  45     }
  46
  47     @Override
  48     public DOMStoreReadWriteTransaction newReadWriteTransaction(TransactionIdentifier identifier) {
  49         return SnapshotBackedTransactions.newReadWriteTransaction(identifier, false, dataTree.takeSnapshot(), this);
  50     }
  51
  52     @Override
  53     protected void transactionAborted(final SnapshotBackedWriteTransaction<TransactionIdentifier> tx) {
  54         // No-op
  55     }
  56
  57     @Override
  58     protected DOMStoreThreePhaseCommitCohort transactionReady(final SnapshotBackedWriteTransaction<TransactionIdentifier> tx,
  59             final DataTreeModification tree) {
  60         return new LocalThreePhaseCommitCohort(actorContext, leader, tx, tree) {
  61             @Override
  62             protected void transactionAborted(final SnapshotBackedWriteTransaction<TransactionIdentifier> transaction) {
  63                 // No-op
  64                 LOG.debug("Transaction {} aborted", transaction);
  65             }
  66
  67             @Override
  68             protected void transactionCommitted(final SnapshotBackedWriteTransaction<TransactionIdentifier> transaction) {
  69                 // No-op
  70                 LOG.debug("Transaction {} committed", transaction);
  71             }
  72         };
  73     }
  74 }