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