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 java.util.Optional;
  18 import java.util.SortedSet;
  19 import org.opendaylight.controller.cluster.access.concepts.ClientIdentifier;
  20 import org.opendaylight.controller.cluster.access.concepts.LocalHistoryIdentifier;
  21 import org.opendaylight.controller.cluster.access.concepts.RequestException;
  22 import org.opendaylight.controller.cluster.access.concepts.TransactionIdentifier;
  23 import org.opendaylight.yangtools.yang.data.api.schema.tree.DataTreeModification;
  24
  25 /**
  26  * Standalone transaction specialization of {@link AbstractFrontendHistory}. There can be multiple open transactions
  27  * and they are submitted in any order.
  28  *
  29  * @author Robert Varga
  30  */
  31 final class StandaloneFrontendHistory extends AbstractFrontendHistory {
  32     private final LocalHistoryIdentifier identifier;
  33     private final ShardDataTree tree;
  34
  35     private StandaloneFrontendHistory(final String persistenceId, final ClientIdentifier clientId,
  36             final ShardDataTree tree, final Map<UnsignedLong, Boolean> closedTransactions,
  37             final RangeSet<UnsignedLong> purgedTransactions) {
  38         super(persistenceId, tree, closedTransactions, purgedTransactions);
  39         this.identifier = new LocalHistoryIdentifier(clientId, 0);
  40         this.tree = Preconditions.checkNotNull(tree);
  41     }
  42
  43     static StandaloneFrontendHistory create(final String persistenceId, final ClientIdentifier clientId,
  44             final ShardDataTree tree) {
  45         return new StandaloneFrontendHistory(persistenceId, clientId, tree, ImmutableMap.of(),
  46             TreeRangeSet.create());
  47     }
  48
  49     static StandaloneFrontendHistory recreate(final String persistenceId, final ClientIdentifier clientId,
  50             final ShardDataTree tree, final Map<UnsignedLong, Boolean> closedTransactions,
  51             final RangeSet<UnsignedLong> purgedTransactions) {
  52         return new StandaloneFrontendHistory(persistenceId, clientId, tree, new HashMap<>(closedTransactions),
  53             purgedTransactions);
  54     }
  55
  56     @Override
  57     public LocalHistoryIdentifier getIdentifier() {
  58         return identifier;
  59     }
  60
  61     @Override
  62     FrontendTransaction createOpenSnapshot(final TransactionIdentifier id) throws RequestException {
  63         return FrontendReadOnlyTransaction.create(this, tree.newReadOnlyTransaction(id));
  64     }
  65
  66     @Override
  67     FrontendTransaction createOpenTransaction(final TransactionIdentifier id) throws RequestException {
  68         return FrontendReadWriteTransaction.createOpen(this, tree.newReadWriteTransaction(id));
  69     }
  70
  71     @Override
  72     FrontendTransaction createReadyTransaction(final TransactionIdentifier id, final DataTreeModification mod)
  73             throws RequestException {
  74         return FrontendReadWriteTransaction.createReady(this, id, mod);
  75     }
  76
  77     @Override
  78     ShardDataTreeCohort createFailedCohort(final TransactionIdentifier id, final DataTreeModification mod,
  79             final Exception failure) {
  80         return tree.createFailedCohort(id, mod, failure);
  81     }
  82
  83     @Override
  84     ShardDataTreeCohort createReadyCohort(final TransactionIdentifier id, final DataTreeModification mod,
  85             final Optional<SortedSet<String>> participatingShardNames) {
  86         return tree.createReadyCohort(id, mod, participatingShardNames);
  87     }
  88 }