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 static java.util.Objects.requireNonNull;
  11
  12 import com.google.common.collect.ImmutableMap;
  13 import com.google.common.primitives.UnsignedLong;
  14 import java.util.HashMap;
  15 import java.util.Map;
  16 import java.util.Optional;
  17 import java.util.SortedSet;
  18 import org.opendaylight.controller.cluster.access.concepts.LocalHistoryIdentifier;
  19 import org.opendaylight.controller.cluster.access.concepts.TransactionIdentifier;
  20 import org.opendaylight.controller.cluster.datastore.utils.MutableUnsignedLongSet;
  21 import org.opendaylight.yangtools.yang.data.tree.api.DataTreeModification;
  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 MutableUnsignedLongSet purgedTransactions) {
  34         super(persistenceId, tree, closedTransactions, purgedTransactions);
  35         this.chain = requireNonNull(chain);
  36     }
  37
  38     static LocalFrontendHistory create(final String persistenceId, final ShardDataTree tree,
  39             final ShardDataTreeTransactionChain chain) {
  40         return new LocalFrontendHistory(persistenceId, tree, chain, ImmutableMap.of(), MutableUnsignedLongSet.of());
  41     }
  42
  43     static LocalFrontendHistory recreate(final String persistenceId, final ShardDataTree tree,
  44             final ShardDataTreeTransactionChain chain, final Map<UnsignedLong, Boolean> closedTransactions,
  45             final MutableUnsignedLongSet purgedTransactions) {
  46         return new LocalFrontendHistory(persistenceId, tree, chain, new HashMap<>(closedTransactions),
  47             purgedTransactions.mutableCopy());
  48     }
  49
  50     @Override
  51     public LocalHistoryIdentifier getIdentifier() {
  52         return chain.getIdentifier();
  53     }
  54
  55     @Override
  56     FrontendTransaction createOpenSnapshot(final TransactionIdentifier id) {
  57         return FrontendReadOnlyTransaction.create(this, chain.newReadOnlyTransaction(id));
  58     }
  59
  60     @Override
  61     FrontendTransaction createOpenTransaction(final TransactionIdentifier id) {
  62         return FrontendReadWriteTransaction.createOpen(this, chain.newReadWriteTransaction(id));
  63     }
  64
  65     @Override
  66     FrontendTransaction createReadyTransaction(final TransactionIdentifier id, final DataTreeModification mod) {
  67         return FrontendReadWriteTransaction.createReady(this, id, mod);
  68     }
  69
  70     @Override
  71     ShardDataTreeCohort createFailedCohort(final TransactionIdentifier id, final DataTreeModification mod,
  72             final Exception failure) {
  73         return chain.createFailedCohort(id, mod, failure);
  74     }
  75
  76     @Override
  77     ShardDataTreeCohort createReadyCohort(final TransactionIdentifier id, final DataTreeModification mod,
  78             final Optional<SortedSet<String>> participatingShardNames) {
  79         return chain.createReadyCohort(id, mod, participatingShardNames);
  80     }
  81 }