dom/mdsal-dom-inmemory-datastore/src/main/java/org/opendaylight/mdsal/dom/store/inmemory/ShardCommitCoordinationTask.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.annotations.Beta;
  12 import com.google.common.base.Preconditions;
  13 import com.google.common.util.concurrent.ListenableFuture;
  14 import java.util.Collection;
  15 import java.util.concurrent.Callable;
  16 import java.util.concurrent.ExecutionException;
  17 import org.opendaylight.mdsal.common.api.TransactionCommitFailedException;
  18 import org.opendaylight.mdsal.dom.api.DOMDataTreeIdentifier;
  19 import org.opendaylight.mdsal.dom.spi.store.DOMStoreThreePhaseCommitCohort;
  20 import org.slf4j.Logger;
  21 import org.slf4j.LoggerFactory;
  22
  23 /**
  24  * Task that coordinates the Commit phase of the provided {@link DOMStoreThreePhaseCommitCohort}'s.
  25  */
  26 @Beta
  27 public class ShardCommitCoordinationTask implements Callable<Void> {
  28
  29     private static final Logger LOG = LoggerFactory.getLogger(ShardCommitCoordinationTask.class);
  30
  31     private final DOMDataTreeIdentifier rootShardPrefix;
  32     private final Collection<DOMStoreThreePhaseCommitCohort> cohorts;
  33     private InmemoryDOMDataTreeShardWriteTransaction transaction;
  34
  35     public ShardCommitCoordinationTask(final DOMDataTreeIdentifier rootShardPrefix,
  36                                        final Collection<DOMStoreThreePhaseCommitCohort> cohorts,
  37                                        final InmemoryDOMDataTreeShardWriteTransaction transaction) {
  38         this.rootShardPrefix = Preconditions.checkNotNull(rootShardPrefix);
  39         this.cohorts = Preconditions.checkNotNull(cohorts);
  40         this.transaction = Preconditions.checkNotNull(transaction);
  41     }
  42
  43     @Override
  44     public Void call() throws TransactionCommitFailedException {
  45
  46         try {
  47             LOG.debug("Shard {}, commit started", rootShardPrefix);
  48             commitBlocking();
  49             transaction.transactionCommited(transaction);
  50
  51             return null;
  52         } catch (final TransactionCommitFailedException e) {
  53             LOG.warn("Shard: {} Submit Error during phase Commit, starting Abort", rootShardPrefix, e);
  54             //FIXME abort here
  55             throw e;
  56         }
  57     }
  58
  59     void commitBlocking() throws TransactionCommitFailedException {
  60         for (final ListenableFuture<?> commit : commitAll()) {
  61             try {
  62                 commit.get();
  63             } catch (InterruptedException | ExecutionException e) {
  64                 throw new TransactionCommitFailedException("Commit failed", e);
  65             }
  66         }
  67     }
  68
  69     private ListenableFuture<?>[] commitAll() {
  70         final ListenableFuture<?>[] ops = new ListenableFuture<?>[cohorts.size()];
  71         int index = 0;
  72         for (final DOMStoreThreePhaseCommitCohort cohort : cohorts) {
  73             ops[index++] = cohort.commit();
  74         }
  75         return ops;
  76     }
  77 }