dom/mdsal-dom-inmemory-datastore/src/main/java/org/opendaylight/mdsal/dom/store/inmemory/ShardCanCommitCoordinationTask.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.ListenableFuture;
  12 import java.util.Collection;
  13 import java.util.concurrent.Callable;
  14 import java.util.concurrent.ExecutionException;
  15 import org.opendaylight.mdsal.common.api.TransactionCommitFailedException;
  16 import org.opendaylight.mdsal.dom.api.DOMDataTreeIdentifier;
  17 import org.opendaylight.mdsal.dom.spi.store.DOMStoreThreePhaseCommitCohort;
  18 import org.slf4j.Logger;
  19 import org.slf4j.LoggerFactory;
  20
  21 class ShardCanCommitCoordinationTask implements Callable<Boolean> {
  22
  23     private static final Logger LOG = LoggerFactory.getLogger(ShardCanCommitCoordinationTask.class);
  24
  25     private final DOMDataTreeIdentifier rootShardPrefix;
  26     private final Collection<DOMStoreThreePhaseCommitCohort> cohorts;
  27
  28     ShardCanCommitCoordinationTask(final DOMDataTreeIdentifier rootShardPrefix,
  29                                        final Collection<DOMStoreThreePhaseCommitCohort> cohorts) {
  30         this.rootShardPrefix = rootShardPrefix;
  31         this.cohorts = cohorts;
  32     }
  33
  34     @Override
  35     public Boolean call() throws TransactionCommitFailedException {
  36
  37         try {
  38             LOG.debug("Shard {}, canCommit started", rootShardPrefix);
  39             canCommitBlocking();
  40
  41             return true;
  42         } catch (TransactionCommitFailedException e) {
  43             LOG.warn("Shard: {} Submit Error during phase CanCommit, starting Abort", rootShardPrefix, e);
  44             //FIXME abort here
  45             throw e;
  46         }
  47     }
  48
  49     void canCommitBlocking() throws TransactionCommitFailedException {
  50         for (final ListenableFuture<?> canCommit : canCommitAll()) {
  51             try {
  52                 final Boolean result = (Boolean)canCommit.get();
  53                 if (result == null || !result) {
  54                     throw new TransactionCommitFailedException("CanCommit failed, no detailed cause available.");
  55                 }
  56             } catch (InterruptedException | ExecutionException e) {
  57                 throw new TransactionCommitFailedException("CanCommit failed", e);
  58             }
  59         }
  60     }
  61
  62     private ListenableFuture<?>[] canCommitAll() {
  63         final ListenableFuture<?>[] ops = new ListenableFuture<?>[cohorts.size()];
  64         int i = 0;
  65         for (final DOMStoreThreePhaseCommitCohort cohort : cohorts) {
  66             ops[i++] = cohort.canCommit();
  67         }
  68         return ops;
  69     }
  70 }