renderers/vpp/src/main/java/org/opendaylight/groupbasedpolicy/renderer/vpp/listener/RendererPolicyListener.java

   1 /*
   2  * Copyright (c) 2016 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
   9 package org.opendaylight.groupbasedpolicy.renderer.vpp.listener;
  10
  11 import javax.annotation.Nonnull;
  12
  13 import org.opendaylight.controller.config.yang.config.vpp_provider.impl.VppRenderer;
  14 import org.opendaylight.controller.md.sal.binding.api.DataBroker;
  15 import org.opendaylight.controller.md.sal.binding.api.DataObjectModification;
  16 import org.opendaylight.controller.md.sal.binding.api.DataTreeIdentifier;
  17 import org.opendaylight.controller.md.sal.common.api.data.LogicalDatastoreType;
  18 import org.opendaylight.groupbasedpolicy.renderer.vpp.event.RendererPolicyConfEvent;
  19 import org.opendaylight.groupbasedpolicy.util.DataTreeChangeHandler;
  20 import org.opendaylight.groupbasedpolicy.util.IidFactory;
  21 import org.opendaylight.yang.gen.v1.urn.opendaylight.groupbasedpolicy.renderer.rev151103.renderers.renderer.RendererPolicy;
  22 import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
  23 import org.slf4j.Logger;
  24 import org.slf4j.LoggerFactory;
  25
  26 import com.google.common.base.Preconditions;
  27 import com.google.common.eventbus.EventBus;
  28
  29 public class RendererPolicyListener extends DataTreeChangeHandler<RendererPolicy> {
  30
  31     private static final Logger LOG = LoggerFactory.getLogger(RendererPolicyListener.class);
  32     private EventBus eventBus;
  33
  34     public RendererPolicyListener(@Nonnull DataBroker dataProvider, @Nonnull EventBus eventBus) {
  35         super(dataProvider);
  36         this.eventBus = Preconditions.checkNotNull(eventBus);
  37         registerDataTreeChangeListener(new DataTreeIdentifier<>(LogicalDatastoreType.CONFIGURATION,
  38                 IidFactory.rendererIid(VppRenderer.NAME).child(RendererPolicy.class)));
  39     }
  40
  41     @Override
  42     protected void onWrite(DataObjectModification<RendererPolicy> rootNode,
  43             InstanceIdentifier<RendererPolicy> rootIdentifier) {
  44         RendererPolicyConfEvent event =
  45                 new RendererPolicyConfEvent(rootIdentifier, rootNode.getDataBefore(), rootNode.getDataAfter());
  46         LOG.trace("Dispatching event on write: {}", event.getClass());
  47         eventBus.post(event);
  48     }
  49
  50     @Override
  51     protected void onDelete(DataObjectModification<RendererPolicy> rootNode,
  52             InstanceIdentifier<RendererPolicy> rootIdentifier) {
  53         RendererPolicyConfEvent event =
  54                 new RendererPolicyConfEvent(rootIdentifier, rootNode.getDataBefore(), rootNode.getDataAfter());
  55         LOG.trace("Dispatching event on delete: {}", event.getClass());
  56         eventBus.post(event);
  57     }
  58
  59     @Override
  60     protected void onSubtreeModified(DataObjectModification<RendererPolicy> rootNode,
  61             InstanceIdentifier<RendererPolicy> rootIdentifier) {
  62         RendererPolicyConfEvent event =
  63                 new RendererPolicyConfEvent(rootIdentifier, rootNode.getDataBefore(), rootNode.getDataAfter());
  64         LOG.trace("Dispatching event on subtree modified: {}", event.getClass());
  65         eventBus.post(event);
  66     }
  67
  68 }