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 static org.opendaylight.controller.md.sal.binding.api.DataObjectModification.ModificationType;
  12 import static org.opendaylight.controller.md.sal.binding.api.DataObjectModification.ModificationType.DELETE;
  13 import static org.opendaylight.controller.md.sal.binding.api.DataObjectModification.ModificationType.SUBTREE_MODIFIED;
  14 import static org.opendaylight.controller.md.sal.binding.api.DataObjectModification.ModificationType.WRITE;
  15
  16 import javax.annotation.Nonnull;
  17 import org.opendaylight.controller.md.sal.binding.api.DataObjectModification;
  18 import org.opendaylight.controller.md.sal.binding.api.DataTreeChangeListener;
  19 import org.opendaylight.controller.md.sal.binding.api.DataTreeModification;
  20 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.controller.config.sal.clustering.it.car.rev140818.Cars;
  21 import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
  22 import org.slf4j.Logger;
  23 import org.slf4j.LoggerFactory;
  24
  25 /**
  26  * Provides a basic DTCL implementation for performance testing reasons.  Emits a rudimentary
  27  * summary of the changes that occurred.
  28  *
  29  * @author Ryan Goulding (ryandgoulding@gmail.com)
  30  */
  31 public class CarDataTreeChangeListener implements DataTreeChangeListener<Cars> {
  32     private static final Logger LOG = LoggerFactory.getLogger(CarDataTreeChangeListener.class);
  33
  34     @java.lang.Override
  35     public void onDataTreeChanged(@Nonnull java.util.Collection<DataTreeModification<Cars>> changes) {
  36         if (LOG.isTraceEnabled()) {
  37             for (DataTreeModification<Cars> change : changes) {
  38                 ouputChanges(change);
  39             }
  40         }
  41     }
  42
  43     private void ouputChanges(final DataTreeModification<Cars> change) {
  44         final DataObjectModification<Cars> rootNode = change.getRootNode();
  45         final ModificationType modificationType = rootNode.getModificationType();
  46         final InstanceIdentifier<Cars> rootIdentifier = change.getRootPath().getRootIdentifier();
  47         switch (modificationType) {
  48             case WRITE:
  49             case SUBTREE_MODIFIED: {
  50                 final Cars dataBefore = rootNode.getDataBefore();
  51                 final Cars dataAfter = rootNode.getDataAfter();
  52                 LOG.trace("onDataTreeChanged - Cars config with path {} was added or changed from {} to {}",
  53                         rootIdentifier, dataBefore, dataAfter);
  54                 break;
  55             }
  56             case DELETE: {
  57                 LOG.trace("onDataTreeChanged - Cars config with path {} was deleted", rootIdentifier);
  58                 break;
  59             }
  60             default: {
  61                 LOG.trace("onDataTreeChanged called with unknown modificationType: {}", modificationType);
  62                 break;
  63             }
  64         }
  65     }
  66 }