opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/datastore/LocalTransactionChain.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.sal.core.spi.data.AbstractSnapshotBackedTransactionChain;
  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.SnapshotBackedWriteTransaction;
  17 import org.opendaylight.yangtools.yang.data.api.schema.tree.DataTree;
  18 import org.opendaylight.yangtools.yang.data.api.schema.tree.DataTreeModification;
  19 import org.opendaylight.yangtools.yang.data.api.schema.tree.DataTreeSnapshot;
  20
  21 /**
  22  * Transaction chain instantiated on top of a locally-available DataTree. It does not instantiate
  23  * a transaction in the leader and rather chains transactions on top of themselves.
  24  */
  25 final class LocalTransactionChain extends AbstractSnapshotBackedTransactionChain<TransactionIdentifier>
  26         implements LocalTransactionFactory {
  27     private static final Throwable ABORTED = new Throwable("Transaction aborted");
  28     private final TransactionChainProxy parent;
  29     private final ActorSelection leader;
  30     private final DataTree tree;
  31
  32     LocalTransactionChain(final TransactionChainProxy parent, final ActorSelection leader, final DataTree tree) {
  33         this.parent = Preconditions.checkNotNull(parent);
  34         this.leader = Preconditions.checkNotNull(leader);
  35         this.tree = Preconditions.checkNotNull(tree);
  36     }
  37
  38     DataTree getDataTree() {
  39         return tree;
  40     }
  41
  42     @Override
  43     protected TransactionIdentifier nextTransactionIdentifier() {
  44         throw new UnsupportedOperationException();
  45     }
  46
  47     @Override
  48     protected boolean getDebugTransactions() {
  49         return false;
  50     }
  51
  52     @Override
  53     protected DataTreeSnapshot takeSnapshot() {
  54         return tree.takeSnapshot();
  55     }
  56
  57     @Override
  58     protected DOMStoreThreePhaseCommitCohort createCohort(final SnapshotBackedWriteTransaction<TransactionIdentifier> transaction, final DataTreeModification modification) {
  59         return new LocalThreePhaseCommitCohort(parent.getActorContext(), leader, transaction, modification) {
  60             @Override
  61             protected void transactionAborted(final SnapshotBackedWriteTransaction<TransactionIdentifier> transaction) {
  62                 onTransactionFailed(transaction, ABORTED);
  63             }
  64
  65             @Override
  66             protected void transactionCommitted(final SnapshotBackedWriteTransaction<TransactionIdentifier> transaction) {
  67                 onTransactionCommited(transaction);
  68             }
  69         };
  70     }
  71
  72     @Override
  73     public DOMStoreReadWriteTransaction newReadWriteTransaction(TransactionIdentifier identifier) {
  74         return super.newReadWriteTransaction(identifier);
  75     }
  76 }