dom/mdsal-dom-broker/src/main/java/org/opendaylight/mdsal/dom/broker/SerializedDOMDataBroker.java

   1 /*
   2  * Copyright (c) 2014 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 package org.opendaylight.mdsal.dom.broker;
   9
  10 import static java.util.Objects.requireNonNull;
  11
  12 import com.google.common.util.concurrent.FluentFuture;
  13 import com.google.common.util.concurrent.Futures;
  14 import com.google.common.util.concurrent.ListenableFuture;
  15 import java.util.Map;
  16 import java.util.concurrent.Executor;
  17 import java.util.concurrent.RejectedExecutionException;
  18 import org.opendaylight.mdsal.common.api.CommitInfo;
  19 import org.opendaylight.mdsal.common.api.LogicalDatastoreType;
  20 import org.opendaylight.mdsal.common.api.TransactionCommitFailedException;
  21 import org.opendaylight.mdsal.dom.api.DOMDataTreeWriteTransaction;
  22 import org.opendaylight.mdsal.dom.broker.CommitCoordinationTask.WithTracker;
  23 import org.opendaylight.mdsal.dom.spi.store.DOMStore;
  24 import org.opendaylight.mdsal.dom.spi.store.DOMStoreThreePhaseCommitCohort;
  25 import org.opendaylight.yangtools.util.DurationStatisticsTracker;
  26 import org.opendaylight.yangtools.util.concurrent.FluentFutures;
  27 import org.slf4j.Logger;
  28 import org.slf4j.LoggerFactory;
  29
  30 /**
  31  * Implementation of blocking three phase commit coordinator, which which supports coordination on multiple
  32  * {@link DOMStoreThreePhaseCommitCohort}. This implementation does not support cancellation of commit.
  33  *
  34  * <p>
  35  * In order to advance to next phase of three phase commit all subtasks of previous step must be finish.
  36  *
  37  * <p>
  38  * This executor does not have an upper bound on subtask timeout.
  39  */
  40 public final class SerializedDOMDataBroker extends AbstractDOMDataBroker {
  41     private static final Logger LOG = LoggerFactory.getLogger(SerializedDOMDataBroker.class);
  42
  43     private final DurationStatisticsTracker commitStatsTracker = DurationStatisticsTracker.createConcurrent();
  44     private final Executor executor;
  45
  46     /**
  47      * Construct DOMDataCommitCoordinator which uses supplied executor to
  48      * process commit coordinations.
  49      *
  50      * @param datastores the Map of backing DOMStore instances
  51      * @param executor the Executor to use
  52      */
  53     public SerializedDOMDataBroker(final Map<LogicalDatastoreType, DOMStore> datastores, final Executor executor) {
  54         super(datastores);
  55         this.executor = requireNonNull(executor, "executor must not be null.");
  56     }
  57
  58     public DurationStatisticsTracker getCommitStatsTracker() {
  59         return commitStatsTracker;
  60     }
  61
  62     @Override
  63     protected FluentFuture<CommitInfo> commit(final DOMDataTreeWriteTransaction transaction,
  64             final DOMStoreThreePhaseCommitCohort cohort) {
  65         LOG.debug("Tx: {} is submitted for execution.", transaction.getIdentifier());
  66
  67         final ListenableFuture<CommitInfo> future;
  68         try {
  69             // FIXME: use FluentFutures.submit() once it is available
  70             future = Futures.submit(new WithTracker(transaction, cohort, commitStatsTracker), executor);
  71         } catch (RejectedExecutionException e) {
  72             LOG.error("The commit executor's queue is full - submit task was rejected. \n{}", executor, e);
  73             return FluentFutures.immediateFailedFluentFuture(new TransactionCommitFailedException(
  74                 "Could not submit the commit task - the commit queue capacity has been exceeded.", e));
  75         }
  76
  77         return FluentFuture.from(future);
  78     }
  79 }