opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/databroker/actors/dds/ClientTransactionCommitCohort.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.databroker.actors.dds;
   9
  10 import com.google.common.collect.ImmutableList;
  11 import com.google.common.util.concurrent.ListenableFuture;
  12 import com.google.common.util.concurrent.MoreExecutors;
  13 import java.util.Collection;
  14 import org.opendaylight.controller.cluster.access.concepts.TransactionIdentifier;
  15 import org.opendaylight.mdsal.common.api.CommitInfo;
  16 import org.opendaylight.yangtools.yang.common.Empty;
  17
  18 final class ClientTransactionCommitCohort extends AbstractTransactionCommitCohort {
  19     private final Collection<AbstractProxyTransaction> proxies;
  20
  21     ClientTransactionCommitCohort(final AbstractClientHistory parent, final TransactionIdentifier txId,
  22             final Collection<AbstractProxyTransaction> proxies) {
  23         super(parent, txId);
  24         this.proxies = ImmutableList.copyOf(proxies);
  25     }
  26
  27     @Override
  28     public ListenableFuture<Boolean> canCommit() {
  29         /*
  30          * Issue the request to commit for all participants. We will track the results and report them.
  31          */
  32         final VotingFuture<Boolean> ret = new VotingFuture<>(Boolean.TRUE, proxies.size());
  33         for (AbstractProxyTransaction proxy : proxies) {
  34             proxy.canCommit(ret);
  35         }
  36
  37         return ret;
  38     }
  39
  40     private <T> ListenableFuture<T> addComplete(final ListenableFuture<T> future) {
  41         future.addListener(this::complete, MoreExecutors.directExecutor());
  42         return future;
  43     }
  44
  45     @Override
  46     public ListenableFuture<Empty> preCommit() {
  47         final var ret = new VotingFuture<>(Empty.value(), proxies.size());
  48         for (AbstractProxyTransaction proxy : proxies) {
  49             proxy.preCommit(ret);
  50         }
  51
  52         return ret;
  53     }
  54
  55     @Override
  56     public ListenableFuture<CommitInfo> commit() {
  57         final var ret = new VotingFuture<>(CommitInfo.empty(), proxies.size());
  58         for (AbstractProxyTransaction proxy : proxies) {
  59             proxy.doCommit(ret);
  60         }
  61
  62         return addComplete(ret);
  63     }
  64
  65     @Override
  66     public ListenableFuture<Empty> abort() {
  67         final var ret = new VotingFuture<>(Empty.value(), proxies.size());
  68         for (AbstractProxyTransaction proxy : proxies) {
  69             proxy.abort(ret);
  70         }
  71
  72         return addComplete(ret);
  73     }
  74 }