opendaylight/md-sal/sal-dom-broker/src/main/java/org/opendaylight/controller/md/sal/dom/broker/impl/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
   9 package org.opendaylight.controller.md.sal.dom.broker.impl;
  10
  11 import com.google.common.base.Preconditions;
  12 import com.google.common.util.concurrent.CheckedFuture;
  13 import com.google.common.util.concurrent.Futures;
  14 import com.google.common.util.concurrent.ListenableFuture;
  15 import com.google.common.util.concurrent.ListeningExecutorService;
  16 import java.util.Collection;
  17 import java.util.Map;
  18 import java.util.concurrent.RejectedExecutionException;
  19 import org.opendaylight.controller.md.sal.common.api.data.LogicalDatastoreType;
  20 import org.opendaylight.controller.md.sal.common.api.data.TransactionCommitFailedException;
  21 import org.opendaylight.controller.md.sal.dom.api.DOMDataWriteTransaction;
  22 import org.opendaylight.controller.sal.core.spi.data.DOMStore;
  23 import org.opendaylight.controller.sal.core.spi.data.DOMStoreThreePhaseCommitCohort;
  24 import org.opendaylight.yangtools.util.DurationStatisticsTracker;
  25 import org.opendaylight.yangtools.util.concurrent.MappingCheckedFuture;
  26 import org.slf4j.Logger;
  27 import org.slf4j.LoggerFactory;
  28
  29 /**
  30  * Implementation of blocking three phase commit coordinator, which which
  31  * supports coordination on multiple {@link DOMStoreThreePhaseCommitCohort}.
  32  *
  33  * This implementation does not support cancellation of commit,
  34  *
  35  * In order to advance to next phase of three phase commit all subtasks of
  36  * previous step must be finish.
  37  *
  38  * This executor does not have an upper bound on subtask timeout.
  39  */
  40 public class SerializedDOMDataBroker extends AbstractDOMDataBroker {
  41     private static final Logger LOG = LoggerFactory.getLogger(SerializedDOMDataBroker.class);
  42     private final DurationStatisticsTracker commitStatsTracker = DurationStatisticsTracker.createConcurrent();
  43     private final ListeningExecutorService executor;
  44
  45     /**
  46      *
  47      * Construct DOMDataCommitCoordinator which uses supplied executor to
  48      * process commit coordinations.
  49      *
  50      * @param executor
  51      */
  52     public SerializedDOMDataBroker(final Map<LogicalDatastoreType, DOMStore> datastores, final ListeningExecutorService executor) {
  53         super(datastores);
  54         this.executor = Preconditions.checkNotNull(executor, "executor must not be null.");
  55     }
  56
  57     public DurationStatisticsTracker getCommitStatsTracker() {
  58         return commitStatsTracker;
  59     }
  60
  61     @Override
  62     protected CheckedFuture<Void,TransactionCommitFailedException> submit(final DOMDataWriteTransaction transaction,
  63             final Collection<DOMStoreThreePhaseCommitCohort> cohorts) {
  64         Preconditions.checkArgument(transaction != null, "Transaction must not be null.");
  65         Preconditions.checkArgument(cohorts != null, "Cohorts must not be null.");
  66         LOG.debug("Tx: {} is submitted for execution.", transaction.getIdentifier());
  67
  68         ListenableFuture<Void> commitFuture = null;
  69         try {
  70             commitFuture = executor.submit(new CommitCoordinationTask(transaction, cohorts,
  71                     commitStatsTracker));
  72         } catch(RejectedExecutionException e) {
  73             LOG.error("The commit executor's queue is full - submit task was rejected. \n" +
  74                       executor, e);
  75             return Futures.immediateFailedCheckedFuture(
  76                     new TransactionCommitFailedException(
  77                         "Could not submit the commit task - the commit queue capacity has been exceeded.", e));
  78         }
  79
  80         return MappingCheckedFuture.create(commitFuture,
  81                 TransactionCommitFailedExceptionMapper.COMMIT_ERROR_MAPPER);
  82     }
  83 }