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 static java.util.Objects.requireNonNull;
  12
  13 import com.google.common.annotations.Beta;
  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 Commit phase of the provided {@link DOMStoreThreePhaseCommitCohort}'s.
  26  */
  27 @Beta
  28 public class ShardCommitCoordinationTask implements Callable<Void> {
  29
  30     private static final Logger LOG = LoggerFactory.getLogger(ShardCommitCoordinationTask.class);
  31
  32     private final DOMDataTreeIdentifier rootShardPrefix;
  33     private final Collection<DOMStoreThreePhaseCommitCohort> cohorts;
  34     private InmemoryDOMDataTreeShardWriteTransaction transaction;
  35
  36     public ShardCommitCoordinationTask(final DOMDataTreeIdentifier rootShardPrefix,
  37                                        final Collection<DOMStoreThreePhaseCommitCohort> cohorts,
  38                                        final InmemoryDOMDataTreeShardWriteTransaction transaction) {
  39         this.rootShardPrefix = requireNonNull(rootShardPrefix);
  40         this.cohorts = requireNonNull(cohorts);
  41         this.transaction = requireNonNull(transaction);
  42     }
  43
  44     @Override
  45     public Void call() throws TransactionCommitFailedException {
  46
  47         try {
  48             LOG.debug("Shard {}, commit started", rootShardPrefix);
  49             commitBlocking();
  50             transaction.transactionCommited(transaction);
  51
  52             return null;
  53         } catch (final TransactionCommitFailedException e) {
  54             LOG.warn("Shard: {} Submit Error during phase Commit, starting Abort", rootShardPrefix, e);
  55             //FIXME abort here
  56             throw e;
  57         }
  58     }
  59
  60     void commitBlocking() throws TransactionCommitFailedException {
  61         for (final ListenableFuture<?> commit : commitAll()) {
  62             try {
  63                 commit.get();
  64             } catch (InterruptedException | ExecutionException e) {
  65                 throw new TransactionCommitFailedException("Commit failed", e);
  66             }
  67         }
  68     }
  69
  70     private ListenableFuture<?>[] commitAll() {
  71         final ListenableFuture<?>[] ops = new ListenableFuture<?>[cohorts.size()];
  72         int index = 0;
  73         for (final DOMStoreThreePhaseCommitCohort cohort : cohorts) {
  74             ops[index++] = cohort.commit();
  75         }
  76         return ops;
  77     }
  78 }