dom/mdsal-dom-inmemory-datastore/src/main/java/org/opendaylight/mdsal/dom/store/inmemory/ShardPreCommitCoordinationTask.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
  10 package org.opendaylight.mdsal.dom.store.inmemory;
  11
  12 import com.google.common.annotations.Beta;
  13 import com.google.common.base.Preconditions;
  14 import com.google.common.util.concurrent.ListenableFuture;
  15 import java.util.Collection;
  16 import java.util.concurrent.Callable;
  17 import java.util.concurrent.ExecutionException;
  18 import org.opendaylight.mdsal.common.api.TransactionCommitFailedException;
  19 import org.opendaylight.mdsal.dom.api.DOMDataTreeIdentifier;
  20 import org.opendaylight.mdsal.dom.spi.store.DOMStoreThreePhaseCommitCohort;
  21 import org.slf4j.Logger;
  22 import org.slf4j.LoggerFactory;
  23
  24 /**
  25  * Task that coordinates the PreCommit phase of the provided {@link DOMStoreThreePhaseCommitCohort}'s
  26  */
  27 @Beta
  28 public class ShardPreCommitCoordinationTask implements Callable<Void>{
  29
  30     private static final Logger LOG = LoggerFactory.getLogger(ShardPreCommitCoordinationTask.class);
  31
  32     private final DOMDataTreeIdentifier rootShardPrefix;
  33     private final Collection<DOMStoreThreePhaseCommitCohort> cohorts;
  34
  35     public ShardPreCommitCoordinationTask(final DOMDataTreeIdentifier rootShardPrefix,
  36                                        final Collection<DOMStoreThreePhaseCommitCohort> cohorts) {
  37         this.rootShardPrefix = Preconditions.checkNotNull(rootShardPrefix);
  38         this.cohorts = Preconditions.checkNotNull(cohorts);
  39     }
  40
  41     @Override
  42     public Void call() throws TransactionCommitFailedException {
  43
  44         try {
  45             LOG.debug("Shard {}, preCommit started", rootShardPrefix);
  46             preCommitBlocking();
  47
  48             return null;
  49         } catch (final TransactionCommitFailedException e) {
  50             LOG.warn("Shard: {} Submit Error during phase {}, starting Abort", rootShardPrefix, e);
  51             //FIXME abort here
  52             throw e;
  53         }
  54     }
  55
  56     void preCommitBlocking() throws TransactionCommitFailedException {
  57         for (final ListenableFuture<?> preCommit : preCommitAll()) {
  58             try {
  59                 preCommit.get();
  60             } catch (InterruptedException | ExecutionException e) {
  61                 throw new TransactionCommitFailedException("PreCommit failed", e);
  62             }
  63         }
  64     }
  65
  66     private ListenableFuture<?>[] preCommitAll() {
  67         final ListenableFuture<?>[] ops = new ListenableFuture<?>[cohorts.size()];
  68         int i = 0;
  69         for (final DOMStoreThreePhaseCommitCohort cohort : cohorts) {
  70             ops[i++] = cohort.preCommit();
  71         }
  72         return ops;
  73     }
  74
  75 }