opendaylight/md-sal/samples/clustering-test-app/provider/src/main/java/org/opendaylight/controller/clustering/it/provider/CarDataTreeChangeListener.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
   9 package org.opendaylight.controller.clustering.it.provider;
  10
  11 import javax.annotation.Nonnull;
  12 import org.opendaylight.controller.md.sal.binding.api.DataObjectModification;
  13 import org.opendaylight.controller.md.sal.binding.api.DataObjectModification.ModificationType;
  14 import org.opendaylight.controller.md.sal.binding.api.DataTreeChangeListener;
  15 import org.opendaylight.controller.md.sal.binding.api.DataTreeModification;
  16 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.controller.config.sal.clustering.it.car.rev140818.Cars;
  17 import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
  18 import org.slf4j.Logger;
  19 import org.slf4j.LoggerFactory;
  20
  21 /**
  22  * Provides a basic DTCL implementation for performance testing reasons.  Emits a rudimentary
  23  * summary of the changes that occurred.
  24  *
  25  * @author Ryan Goulding (ryandgoulding@gmail.com)
  26  */
  27 public class CarDataTreeChangeListener implements DataTreeChangeListener<Cars> {
  28     private static final Logger LOG = LoggerFactory.getLogger(CarDataTreeChangeListener.class);
  29
  30     @java.lang.Override
  31     public void onDataTreeChanged(@Nonnull final java.util.Collection<DataTreeModification<Cars>> changes) {
  32         if (LOG.isTraceEnabled()) {
  33             for (DataTreeModification<Cars> change : changes) {
  34                 ouputChanges(change);
  35             }
  36         }
  37     }
  38
  39     private static void ouputChanges(final DataTreeModification<Cars> change) {
  40         final DataObjectModification<Cars> rootNode = change.getRootNode();
  41         final ModificationType modificationType = rootNode.getModificationType();
  42         final InstanceIdentifier<Cars> rootIdentifier = change.getRootPath().getRootIdentifier();
  43         switch (modificationType) {
  44             case WRITE:
  45             case SUBTREE_MODIFIED: {
  46                 final Cars dataBefore = rootNode.getDataBefore();
  47                 final Cars dataAfter = rootNode.getDataAfter();
  48                 LOG.trace("onDataTreeChanged - Cars config with path {} was added or changed from {} to {}",
  49                         rootIdentifier, dataBefore, dataAfter);
  50                 break;
  51             }
  52             case DELETE: {
  53                 LOG.trace("onDataTreeChanged - Cars config with path {} was deleted", rootIdentifier);
  54                 break;
  55             }
  56             default: {
  57                 LOG.trace("onDataTreeChanged called with unknown modificationType: {}", modificationType);
  58                 break;
  59             }
  60         }
  61     }
  62 }