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