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.DOMStoreReadTransaction;
  15 import org.opendaylight.controller.sal.core.spi.data.DOMStoreReadWriteTransaction;
  16 import org.opendaylight.controller.sal.core.spi.data.DOMStoreThreePhaseCommitCohort;
  17 import org.opendaylight.controller.sal.core.spi.data.DOMStoreWriteTransaction;
  18 import org.opendaylight.controller.sal.core.spi.data.SnapshotBackedTransactions;
  19 import org.opendaylight.controller.sal.core.spi.data.SnapshotBackedWriteTransaction;
  20 import org.opendaylight.controller.sal.core.spi.data.SnapshotBackedWriteTransaction.TransactionReadyPrototype;
  21 import org.opendaylight.yangtools.yang.data.api.schema.tree.DataTree;
  22 import org.opendaylight.yangtools.yang.data.api.schema.tree.DataTreeModification;
  23 import org.slf4j.Logger;
  24 import org.slf4j.LoggerFactory;
  25
  26 /**
  27  * {@link LocalTransactionFactory} for instantiating backing transactions which are
  28  * disconnected from each other, ie not chained. These are used by {@link AbstractTransactionContextFactory}
  29  * to instantiate transactions on shards which are co-located with the shard leader.
  30  */
  31 final class LocalTransactionFactoryImpl extends TransactionReadyPrototype<TransactionIdentifier>
  32         implements LocalTransactionFactory {
  33
  34     private static final Logger LOG = LoggerFactory.getLogger(LocalTransactionFactoryImpl.class);
  35     private final ActorSelection leader;
  36     private final DataTree dataTree;
  37     private final ActorContext actorContext;
  38
  39     LocalTransactionFactoryImpl(final ActorContext actorContext, final ActorSelection leader, final DataTree dataTree) {
  40         this.leader = Preconditions.checkNotNull(leader);
  41         this.dataTree = Preconditions.checkNotNull(dataTree);
  42         this.actorContext = actorContext;
  43     }
  44
  45     DataTree getDataTree() {
  46         return dataTree;
  47     }
  48
  49     @Override
  50     public DOMStoreReadTransaction newReadOnlyTransaction(TransactionIdentifier identifier) {
  51         return SnapshotBackedTransactions.newReadTransaction(identifier, false, dataTree.takeSnapshot());
  52     }
  53
  54     @Override
  55     public DOMStoreReadWriteTransaction newReadWriteTransaction(TransactionIdentifier identifier) {
  56         return SnapshotBackedTransactions.newReadWriteTransaction(identifier, false, dataTree.takeSnapshot(), this);
  57     }
  58
  59     @Override
  60     public DOMStoreWriteTransaction newWriteOnlyTransaction(TransactionIdentifier identifier) {
  61         return SnapshotBackedTransactions.newWriteTransaction(identifier, false, dataTree.takeSnapshot(), this);
  62     }
  63
  64     @Override
  65     protected void transactionAborted(final SnapshotBackedWriteTransaction<TransactionIdentifier> tx) {
  66         // No-op
  67     }
  68
  69     @Override
  70     protected DOMStoreThreePhaseCommitCohort transactionReady(final SnapshotBackedWriteTransaction<TransactionIdentifier> tx,
  71             final DataTreeModification tree) {
  72         return new LocalThreePhaseCommitCohort(actorContext, leader, tx, tree) {
  73             @Override
  74             protected void transactionAborted(final SnapshotBackedWriteTransaction<TransactionIdentifier> transaction) {
  75                 // No-op
  76                 LOG.debug("Transaction {} aborted", transaction);
  77             }
  78
  79             @Override
  80             protected void transactionCommitted(final SnapshotBackedWriteTransaction<TransactionIdentifier> transaction) {
  81                 // No-op
  82                 LOG.debug("Transaction {} committed", transaction);
  83             }
  84         };
  85     }
  86 }