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
  16 final class ClientTransactionCommitCohort extends AbstractTransactionCommitCohort {
  17     private final Collection<AbstractProxyTransaction> proxies;
  18
  19     ClientTransactionCommitCohort(final AbstractClientHistory parent, final TransactionIdentifier txId,
  20             final Collection<AbstractProxyTransaction> proxies) {
  21         super(parent, txId);
  22         this.proxies = ImmutableList.copyOf(proxies);
  23     }
  24
  25     @Override
  26     public ListenableFuture<Boolean> canCommit() {
  27         /*
  28          * Issue the request to commit for all participants. We will track the results and report them.
  29          */
  30         final VotingFuture<Boolean> ret = new VotingFuture<>(Boolean.TRUE, proxies.size());
  31         for (AbstractProxyTransaction proxy : proxies) {
  32             proxy.canCommit(ret);
  33         }
  34
  35         return ret;
  36     }
  37
  38     private ListenableFuture<Void> addComplete(final ListenableFuture<Void> future) {
  39         future.addListener(this::complete, MoreExecutors.directExecutor());
  40         return future;
  41     }
  42
  43     @Override
  44     public ListenableFuture<Void> preCommit() {
  45         final VotingFuture<Void> ret = new VotingFuture<>(null, proxies.size());
  46         for (AbstractProxyTransaction proxy : proxies) {
  47             proxy.preCommit(ret);
  48         }
  49
  50         return ret;
  51     }
  52
  53     @Override
  54     public ListenableFuture<Void> commit() {
  55         final VotingFuture<Void> ret = new VotingFuture<>(null, proxies.size());
  56         for (AbstractProxyTransaction proxy : proxies) {
  57             proxy.doCommit(ret);
  58         }
  59
  60         return addComplete(ret);
  61     }
  62
  63     @Override
  64     public ListenableFuture<Void> abort() {
  65         final VotingFuture<Void> ret = new VotingFuture<>(null, proxies.size());
  66         for (AbstractProxyTransaction proxy : proxies) {
  67             proxy.abort(ret);
  68         }
  69
  70         return addComplete(ret);
  71     }
  72 }