dom/mdsal-dom-inmemory-datastore/src/main/java/org/opendaylight/mdsal/dom/store/inmemory/ForeignShardThreePhaseCommitCohort.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
   9 package org.opendaylight.mdsal.dom.store.inmemory;
  10
  11 import com.google.common.util.concurrent.Futures;
  12 import com.google.common.util.concurrent.ListenableFuture;
  13 import org.opendaylight.mdsal.dom.api.DOMDataTreeIdentifier;
  14 import org.opendaylight.mdsal.dom.spi.shard.ForeignShardModificationContext;
  15 import org.opendaylight.mdsal.dom.spi.store.DOMStoreThreePhaseCommitCohort;
  16 import org.slf4j.Logger;
  17 import org.slf4j.LoggerFactory;
  18
  19 public class ForeignShardThreePhaseCommitCohort implements DOMStoreThreePhaseCommitCohort {
  20
  21     private static final Logger LOG = LoggerFactory.getLogger(ForeignShardThreePhaseCommitCohort.class);
  22
  23     private final DOMDataTreeIdentifier prefix;
  24     private final ForeignShardModificationContext shard;
  25
  26     public ForeignShardThreePhaseCommitCohort(final DOMDataTreeIdentifier prefix,
  27             final ForeignShardModificationContext shard) {
  28         this.prefix = prefix;
  29         this.shard = shard;
  30     }
  31
  32     @Override
  33     public ListenableFuture<Boolean> canCommit() {
  34         LOG.debug("Validating transaction on foreign shard {}", prefix);
  35         return shard.validate();
  36     }
  37
  38     @Override
  39     public ListenableFuture<Void> preCommit() {
  40         LOG.debug("Preparing transaction on foreign shard {}", prefix);
  41         return shard.prepare();
  42     }
  43
  44     @Override
  45     public ListenableFuture<Void> abort() {
  46         // FIXME abort on the shard
  47         return Futures.immediateFuture(null);
  48     }
  49
  50     @Override
  51     public ListenableFuture<Void> commit() {
  52         LOG.debug("Submitting transaction on foreign shard {}", prefix);
  53         return shard.submit();
  54     }
  55 }