opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/datastore/DefaultShardDataTreeChangeListenerPublisher.java

   1 /*
   2  * Copyright (c) 2015 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.controller.cluster.datastore;
   9
  10 import com.google.common.base.Stopwatch;
  11 import java.util.Collection;
  12 import java.util.Collections;
  13 import java.util.concurrent.TimeUnit;
  14 import javax.annotation.concurrent.NotThreadSafe;
  15 import org.opendaylight.controller.md.sal.dom.spi.AbstractDOMDataTreeChangeListenerRegistration;
  16 import org.opendaylight.controller.sal.core.spi.data.AbstractDOMStoreTreeChangePublisher;
  17 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
  18 import org.opendaylight.yangtools.yang.data.api.schema.tree.DataTreeCandidate;
  19 import org.opendaylight.yangtools.yang.data.api.schema.tree.DataTreeCandidateNode;
  20 import org.opendaylight.yangtools.yang.data.api.schema.tree.DataTreeCandidates;
  21 import org.slf4j.Logger;
  22 import org.slf4j.LoggerFactory;
  23
  24 /**
  25  * Default implementation of ShardDataTreeChangeListenerPublisher that directly generates and publishes
  26  * notifications for DataTreeChangeListeners.
  27  *
  28  * @author Thomas Pantelis
  29  */
  30 @NotThreadSafe
  31 final class DefaultShardDataTreeChangeListenerPublisher extends AbstractDOMStoreTreeChangePublisher
  32         implements ShardDataTreeChangeListenerPublisher {
  33     private static final Logger LOG = LoggerFactory.getLogger(DefaultShardDataTreeChangeListenerPublisher.class);
  34
  35     private final Stopwatch timer = Stopwatch.createUnstarted();
  36
  37     @Override
  38     public void publishChanges(final DataTreeCandidate candidate, String logContext) {
  39         timer.start();
  40
  41         try {
  42             processCandidateTree(candidate);
  43         } finally {
  44             timer.stop();
  45             long elapsedTime = timer.elapsed(TimeUnit.MILLISECONDS);
  46             if(elapsedTime >= PUBLISH_DELAY_THRESHOLD_IN_MS) {
  47                 LOG.warn("{}: Generation of DataTreeCandidateNode events took longer than expected. Elapsed time: {}",
  48                         logContext, timer);
  49             } else {
  50                 LOG.debug("{}: Elapsed time for generation of DataTreeCandidateNode events: {}", logContext, timer);
  51             }
  52
  53             timer.reset();
  54         }
  55     }
  56
  57     @Override
  58     public ShardDataTreeChangeListenerPublisher newInstance() {
  59         return new DefaultShardDataTreeChangeListenerPublisher();
  60     }
  61
  62     @Override
  63     protected void notifyListeners(final Collection<AbstractDOMDataTreeChangeListenerRegistration<?>> registrations,
  64             final YangInstanceIdentifier path, final DataTreeCandidateNode node) {
  65         final Collection<DataTreeCandidate> changes = Collections.<DataTreeCandidate>singleton(
  66                 DataTreeCandidates.newDataTreeCandidate(path, node));
  67
  68         for (AbstractDOMDataTreeChangeListenerRegistration<?> reg : registrations) {
  69             reg.getInstance().onDataTreeChanged(changes);
  70         }
  71     }
  72
  73     @Override
  74     protected void registrationRemoved(final AbstractDOMDataTreeChangeListenerRegistration<?> registration) {
  75         LOG.debug("Registration {} removed", registration);
  76     }
  77 }