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