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