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.collect.ImmutableMap;
  12 import com.google.common.collect.RangeSet;
  13 import com.google.common.collect.TreeRangeSet;
  14 import com.google.common.primitives.UnsignedLong;
  15 import java.util.HashMap;
  16 import java.util.Map;
  17 import org.opendaylight.controller.cluster.access.concepts.ClientIdentifier;
  18 import org.opendaylight.controller.cluster.access.concepts.LocalHistoryIdentifier;
  19 import org.opendaylight.controller.cluster.access.concepts.RequestException;
  20 import org.opendaylight.controller.cluster.access.concepts.TransactionIdentifier;
  21 import org.opendaylight.yangtools.yang.data.api.schema.tree.DataTreeModification;
  22
  23 /**
  24  * Standalone transaction specialization of {@link AbstractFrontendHistory}. There can be multiple open transactions
  25  * and they are submitted in any order.
  26  *
  27  * @author Robert Varga
  28  */
  29 final class StandaloneFrontendHistory extends AbstractFrontendHistory {
  30     private final LocalHistoryIdentifier identifier;
  31     private final ShardDataTree tree;
  32
  33     private StandaloneFrontendHistory(final String persistenceId, final ClientIdentifier clientId,
  34             final ShardDataTree tree, final Map<UnsignedLong, Boolean> closedTransactions,
  35             final RangeSet<UnsignedLong> purgedTransactions) {
  36         super(persistenceId, tree, closedTransactions, purgedTransactions);
  37         this.identifier = new LocalHistoryIdentifier(clientId, 0);
  38         this.tree = Preconditions.checkNotNull(tree);
  39     }
  40
  41     static StandaloneFrontendHistory create(final String persistenceId, final ClientIdentifier clientId,
  42             final ShardDataTree tree) {
  43         return new StandaloneFrontendHistory(persistenceId, clientId, tree, ImmutableMap.of(),
  44             TreeRangeSet.create());
  45     }
  46
  47     static StandaloneFrontendHistory recreate(final String persistenceId, final ClientIdentifier clientId,
  48             final ShardDataTree tree, final Map<UnsignedLong, Boolean> closedTransactions,
  49             final RangeSet<UnsignedLong> purgedTransactions) {
  50         return new StandaloneFrontendHistory(persistenceId, clientId, tree, new HashMap<>(closedTransactions),
  51             purgedTransactions);
  52     }
  53
  54     @Override
  55     public LocalHistoryIdentifier getIdentifier() {
  56         return identifier;
  57     }
  58
  59     @Override
  60     FrontendTransaction createOpenSnapshot(final TransactionIdentifier id) throws RequestException {
  61         return FrontendReadOnlyTransaction.create(this, tree.newReadOnlyTransaction(id));
  62     }
  63
  64     @Override
  65     FrontendTransaction createOpenTransaction(final TransactionIdentifier id) throws RequestException {
  66         return FrontendReadWriteTransaction.createOpen(this, tree.newReadWriteTransaction(id));
  67     }
  68
  69     @Override
  70     FrontendTransaction createReadyTransaction(final TransactionIdentifier id, final DataTreeModification mod)
  71             throws RequestException {
  72         return FrontendReadWriteTransaction.createReady(this, id, mod);
  73     }
  74
  75     @Override
  76     ShardDataTreeCohort createFailedCohort(final TransactionIdentifier id, final DataTreeModification mod,
  77             final Exception failure) {
  78         return tree.createFailedCohort(id, mod, failure);
  79     }
  80
  81     @Override
  82     ShardDataTreeCohort createReadyCohort(final TransactionIdentifier id, final DataTreeModification mod) {
  83         return tree.createReadyCohort(id, mod);
  84     }
  85 }