opendaylight/md-sal/samples/clustering-test-app/provider/src/main/java/org/opendaylight/controller/clustering/it/provider/CarDataChangeListener.java

   1 /*
   2  * Copyright (c) 2016 Brocade Communications 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.clustering.it.provider;
   9
  10 import java.util.Collections;
  11 import java.util.Map;
  12 import java.util.Set;
  13 import org.opendaylight.controller.md.sal.binding.api.DataChangeListener;
  14 import org.opendaylight.controller.md.sal.common.api.data.AsyncDataChangeEvent;
  15 import org.opendaylight.yangtools.yang.binding.DataObject;
  16 import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
  17 import org.slf4j.Logger;
  18 import org.slf4j.LoggerFactory;
  19
  20 /**
  21  * Provides a basic DCL implementation for performance testing reasons.  Emits a summary
  22  * of the changes that occurred.
  23  *
  24  * @author Ryan Goulding (ryandgoulding@gmail.com)
  25  */
  26 public class CarDataChangeListener implements DataChangeListener {
  27     private static final Logger LOG = LoggerFactory.getLogger(CarDataChangeListener.class);
  28
  29     @Override
  30     public void onDataChanged(AsyncDataChangeEvent<InstanceIdentifier<?>, DataObject> change) {
  31         if (LOG.isTraceEnabled()) {
  32             LOG.trace("onDataChanged invoked");
  33             outputChanges(change);
  34         }
  35     }
  36
  37     private void outputChanges(final AsyncDataChangeEvent<InstanceIdentifier<?>, DataObject> change) {
  38         final Map<InstanceIdentifier<?>, DataObject> originalData = change.getOriginalData() != null ?
  39                 change.getOriginalData(): Collections.<InstanceIdentifier<?>, DataObject>emptyMap();
  40         final Map<InstanceIdentifier<?>, DataObject> updatedData = change.getUpdatedData() != null ?
  41                 change.getUpdatedData(): Collections.<InstanceIdentifier<?>, DataObject>emptyMap();
  42         final Map<InstanceIdentifier<?>, DataObject> createdData = change.getCreatedData() != null ?
  43                 change.getCreatedData(): Collections.<InstanceIdentifier<?>, DataObject>emptyMap();
  44         final Set<InstanceIdentifier<?>> removedPaths = change.getRemovedPaths() != null ?
  45                 change.getRemovedPaths(): Collections.<InstanceIdentifier<?>>emptySet();
  46         LOG.trace("AsyncDataChangeEvent - originalData={} updatedData={} createdData={} removedPaths={}",
  47                 originalData, updatedData, createdData, removedPaths);
  48     }
  49 }