vpnservice/coe/impl/src/main/java/org/opendaylight/netvirt/coe/listeners/ServiceListener.java

   1 /*
   2  * Copyright (c) 2017 Ericsson India Global Services Pvt Ltd. 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.netvirt.coe.listeners;
  10
  11 import java.util.Collection;
  12 import javax.annotation.Nonnull;
  13 import javax.annotation.PreDestroy;
  14 import javax.inject.Inject;
  15 import javax.inject.Singleton;
  16 import org.opendaylight.controller.md.sal.binding.api.DataBroker;
  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.DataTreeIdentifier;
  20 import org.opendaylight.controller.md.sal.binding.api.DataTreeModification;
  21 import org.opendaylight.controller.md.sal.common.api.data.LogicalDatastoreType;
  22 import org.opendaylight.yang.gen.v1.urn.opendaylight.coe.northbound.service.rev170611.ServiceInformation;
  23 import org.opendaylight.yang.gen.v1.urn.opendaylight.coe.northbound.service.rev170611.service.information.Services;
  24 import org.opendaylight.yangtools.concepts.ListenerRegistration;
  25 import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
  26 import org.slf4j.Logger;
  27 import org.slf4j.LoggerFactory;
  28
  29 @Singleton
  30 public class ServiceListener implements DataTreeChangeListener<Services> {
  31
  32     private static final Logger LOG = LoggerFactory.getLogger(ServiceListener.class);
  33     private ListenerRegistration<ServiceListener> listenerRegistration;
  34     private final DataBroker dataBroker;
  35
  36     @Inject
  37     public ServiceListener(final DataBroker dataBroker) {
  38         registerListener(LogicalDatastoreType.CONFIGURATION, dataBroker);
  39         this.dataBroker = dataBroker;
  40     }
  41
  42     protected InstanceIdentifier<Services> getWildCardPath() {
  43         return InstanceIdentifier.create(ServiceInformation.class).child(Services.class);
  44     }
  45
  46     public void registerListener(LogicalDatastoreType dsType, final DataBroker db) {
  47         final DataTreeIdentifier<Services> treeId = new DataTreeIdentifier<>(dsType, getWildCardPath());
  48         listenerRegistration = db.registerDataTreeChangeListener(treeId, ServiceListener.this);
  49     }
  50
  51     @PreDestroy
  52     public void close() {
  53         if (listenerRegistration != null) {
  54             try {
  55                 listenerRegistration.close();
  56             } finally {
  57                 listenerRegistration = null;
  58             }
  59         }
  60     }
  61
  62     @Override
  63     public void onDataTreeChanged(@Nonnull Collection<DataTreeModification<Services>> changes) {
  64         for (DataTreeModification<Services> change : changes) {
  65             final DataObjectModification<Services> mod = change.getRootNode();
  66
  67             switch (mod.getModificationType()) {
  68                 case DELETE:
  69                     LOG.info("Service deleted {}", mod.getDataBefore());
  70                     break;
  71                 case SUBTREE_MODIFIED:
  72                     LOG.info("Service updated old : {}, new : {}", mod.getDataBefore(), mod.getDataAfter());
  73                     break;
  74                 case WRITE:
  75                     if (mod.getDataBefore() == null) {
  76                         LOG.info("Service added {}", mod.getDataAfter());
  77                     } else {
  78                         LOG.info("Service updated old : {}, new : {}", mod.getDataBefore(), mod.getDataAfter());
  79                     }
  80                     break;
  81                 default:
  82                     // FIXME: May be not a good idea to throw.
  83                     throw new IllegalArgumentException("Unhandled modification type " + mod.getModificationType());
  84             }
  85         }
  86     }
  87 }