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

   1 /*
   2  * Copyright (c) 2016 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 com.google.common.base.Preconditions;
  11 import com.google.common.base.Ticker;
  12 import org.opendaylight.controller.cluster.access.concepts.ClientIdentifier;
  13 import org.opendaylight.controller.cluster.access.concepts.LocalHistoryIdentifier;
  14 import org.opendaylight.controller.cluster.access.concepts.RequestException;
  15 import org.opendaylight.controller.cluster.access.concepts.TransactionIdentifier;
  16 import org.opendaylight.yangtools.yang.data.api.schema.tree.DataTreeModification;
  17
  18 /**
  19  * Standalone transaction specialization of {@link AbstractFrontendHistory}. There can be multiple open transactions
  20  * and they are submitted in any order.
  21  *
  22  * @author Robert Varga
  23  */
  24 final class StandaloneFrontendHistory extends AbstractFrontendHistory {
  25     private final LocalHistoryIdentifier identifier;
  26     private final ShardDataTree tree;
  27
  28     StandaloneFrontendHistory(final String persistenceId, final Ticker ticker, final ClientIdentifier clientId,
  29             final ShardDataTree tree) {
  30         super(persistenceId, ticker);
  31         this.identifier = new LocalHistoryIdentifier(clientId, 0);
  32         this.tree = Preconditions.checkNotNull(tree);
  33     }
  34
  35     @Override
  36     public LocalHistoryIdentifier getIdentifier() {
  37         return identifier;
  38     }
  39
  40     @Override
  41     FrontendTransaction createOpenSnapshot(final TransactionIdentifier id) throws RequestException {
  42         return FrontendReadOnlyTransaction.create(this, tree.newReadOnlyTransaction(id));
  43     }
  44
  45     @Override
  46     FrontendTransaction createOpenTransaction(final TransactionIdentifier id) throws RequestException {
  47         return FrontendReadWriteTransaction.createOpen(this, tree.newReadWriteTransaction(id));
  48     }
  49
  50     @Override
  51     FrontendTransaction createReadyTransaction(final TransactionIdentifier id, final DataTreeModification mod)
  52             throws RequestException {
  53         return FrontendReadWriteTransaction.createReady(this, id, mod);
  54     }
  55
  56     @Override
  57     ShardDataTreeCohort createReadyCohort(final TransactionIdentifier id, final DataTreeModification mod) {
  58         return tree.createReadyCohort(id, mod);
  59     }
  60 }