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 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.eclipse.jdt.annotation.NonNull;
  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.TransactionIdentifier;
  22 import org.opendaylight.controller.cluster.datastore.utils.UnsignedLongSet;
  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 UnsignedLongSet purgedTransactions) {
  38         super(persistenceId, tree, closedTransactions, purgedTransactions);
  39         identifier = new LocalHistoryIdentifier(clientId, 0);
  40         this.tree = requireNonNull(tree);
  41     }
  42
  43     static @NonNull StandaloneFrontendHistory create(final String persistenceId, final ClientIdentifier clientId,
  44             final ShardDataTree tree) {
  45         return new StandaloneFrontendHistory(persistenceId, clientId, tree, ImmutableMap.of(), UnsignedLongSet.of());
  46     }
  47
  48     static @NonNull StandaloneFrontendHistory recreate(final String persistenceId, final ClientIdentifier clientId,
  49             final ShardDataTree tree, final Map<UnsignedLong, Boolean> closedTransactions,
  50             final UnsignedLongSet purgedTransactions) {
  51         return new StandaloneFrontendHistory(persistenceId, clientId, tree, new HashMap<>(closedTransactions),
  52             purgedTransactions.copy());
  53     }
  54
  55     @Override
  56     public LocalHistoryIdentifier getIdentifier() {
  57         return identifier;
  58     }
  59
  60     @Override
  61     FrontendTransaction createOpenSnapshot(final TransactionIdentifier id) {
  62         return FrontendReadOnlyTransaction.create(this, tree.newReadOnlyTransaction(id));
  63     }
  64
  65     @Override
  66     FrontendTransaction createOpenTransaction(final TransactionIdentifier id) {
  67         return FrontendReadWriteTransaction.createOpen(this, tree.newReadWriteTransaction(id));
  68     }
  69
  70     @Override
  71     FrontendTransaction createReadyTransaction(final TransactionIdentifier id, final DataTreeModification mod) {
  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             final Optional<SortedSet<String>> participatingShardNames) {
  84         return tree.createReadyCohort(id, mod, participatingShardNames);
  85     }
  86 }