mappingservice/neutron/src/main/java/org/opendaylight/lispflowmapping/neutron/DelegatingDataTreeListener.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 package org.opendaylight.lispflowmapping.neutron;
   9
  10 import static java.util.Objects.requireNonNull;
  11
  12 import java.util.Collection;
  13 import org.opendaylight.mdsal.binding.api.ClusteredDataTreeChangeListener;
  14 import org.opendaylight.mdsal.binding.api.DataBroker;
  15 import org.opendaylight.mdsal.binding.api.DataObjectModification;
  16 import org.opendaylight.mdsal.binding.api.DataTreeIdentifier;
  17 import org.opendaylight.mdsal.binding.api.DataTreeModification;
  18 import org.opendaylight.yang.gen.v1.urn.opendaylight.neutron.networks.rev150712.networks.attributes.networks.Network;
  19 import org.opendaylight.yang.gen.v1.urn.opendaylight.neutron.ports.rev150712.ports.attributes.ports.Port;
  20 import org.opendaylight.yang.gen.v1.urn.opendaylight.neutron.subnets.rev150712.subnets.attributes.subnets.Subnet;
  21 import org.opendaylight.yangtools.concepts.ListenerRegistration;
  22 import org.opendaylight.yangtools.yang.binding.DataObject;
  23 import org.slf4j.Logger;
  24 import org.slf4j.LoggerFactory;
  25
  26 @Deprecated
  27 public class DelegatingDataTreeListener<T extends DataObject> implements ClusteredDataTreeChangeListener<T>,
  28         AutoCloseable {
  29     private static final Logger LOG = LoggerFactory.getLogger(DelegatingDataTreeListener.class);
  30     private final DataProcessor<T> dataProcessor;
  31     private ListenerRegistration<ClusteredDataTreeChangeListener<T>> dataTreeChangeListenerRegistration;
  32
  33     public DelegatingDataTreeListener(DataProcessor<T> dataProcessor, DataBroker dataBroker,
  34             DataTreeIdentifier<T> dataTreeIdentifier) {
  35         requireNonNull(dataBroker, "Can not instantiate Listener! Broker is null!");
  36         requireNonNull(dataTreeIdentifier, "DataTreeIndentifier can not be null!");
  37         this.dataProcessor = dataProcessor;
  38         dataTreeChangeListenerRegistration = dataBroker.registerDataTreeChangeListener(dataTreeIdentifier ,this);
  39     }
  40
  41     public static <T extends DataObject> DelegatingDataTreeListener initiateListener(
  42             Class<T> dataObject, ILispNeutronService lispNeutronService, DataBroker dataBroker) {
  43
  44         if (dataObject == Network.class) {
  45             return new NetworkListener(new NetworkDataProcessor(lispNeutronService), dataBroker);
  46         } else if (dataObject == Subnet.class) {
  47             return new SubnetListener(new SubnetDataProcessor(lispNeutronService), dataBroker);
  48         } else if (dataObject == Port.class) {
  49             return new PortListener(new PortDataProcessor(lispNeutronService), dataBroker);
  50         }
  51         LOG.debug(dataObject.getName() + " listener can not be instantiated.");
  52         return null;
  53     }
  54
  55     @Override
  56     public void onDataTreeChanged(Collection<DataTreeModification<T>> changes) {
  57         for (DataTreeModification<T> change : changes) {
  58             DataObjectModification<T> mod = change.getRootNode();
  59
  60             if (mod.getModificationType() == DataObjectModification.ModificationType.WRITE) {
  61                 T object = mod.getDataAfter();
  62                 dataProcessor.create(object);
  63                 LOG.info(object.toString() + " created.");
  64             } else if (mod.getModificationType() == DataObjectModification.ModificationType.DELETE) {
  65                 T object = mod.getDataBefore();
  66                 dataProcessor.delete(object);
  67                 LOG.info(object.toString() + " removed.");
  68             } else {
  69                 T object = mod.getDataAfter();
  70                 dataProcessor.update(object);
  71                 LOG.info(object.toString() + " updated.");
  72             }
  73         }
  74     }
  75
  76     @Override
  77     public void close() throws Exception {
  78         if (dataTreeChangeListenerRegistration != null) {
  79             dataTreeChangeListenerRegistration.close();
  80             dataTreeChangeListenerRegistration = null;
  81
  82             LOG.info(this.toString() + " closed");
  83         }
  84     }
  85 }