vpnservice/elanmanager/elanmanager-impl/src/main/java/org/opendaylight/netvirt/elan/utils/CacheElanInterfaceListener.java

   1 /*
   2  * Copyright (c) 2016 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 package org.opendaylight.netvirt.elan.utils;
   9
  10 import java.util.Collection;
  11 import org.opendaylight.controller.md.sal.binding.api.ClusteredDataTreeChangeListener;
  12 import org.opendaylight.controller.md.sal.binding.api.DataBroker;
  13 import org.opendaylight.controller.md.sal.binding.api.DataObjectModification;
  14 import org.opendaylight.controller.md.sal.binding.api.DataTreeIdentifier;
  15 import org.opendaylight.controller.md.sal.binding.api.DataTreeModification;
  16 import org.opendaylight.controller.md.sal.common.api.data.LogicalDatastoreType;
  17 import org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.elan.rev150602.ElanInterfaces;
  18 import org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.elan.rev150602.elan.interfaces.ElanInterface;
  19 import org.opendaylight.yangtools.concepts.ListenerRegistration;
  20 import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
  21 import org.slf4j.Logger;
  22 import org.slf4j.LoggerFactory;
  23
  24 public class CacheElanInterfaceListener implements ClusteredDataTreeChangeListener<ElanInterface> {
  25
  26     private ListenerRegistration<CacheElanInterfaceListener> registration;
  27     private static final Logger LOG = LoggerFactory.getLogger(CacheElanInterfaceListener.class);
  28     private final DataBroker broker;
  29
  30     public CacheElanInterfaceListener(DataBroker dataBroker) {
  31         this.broker = dataBroker;
  32     }
  33
  34     public void init() {
  35         registerListener();
  36     }
  37
  38     private void registerListener() {
  39         final DataTreeIdentifier<ElanInterface> treeId =
  40                 new DataTreeIdentifier<>(LogicalDatastoreType.CONFIGURATION, getWildcardPath());
  41         LOG.trace("Registering on path: {}", treeId);
  42         registration = broker.registerDataTreeChangeListener(treeId, CacheElanInterfaceListener.this);
  43     }
  44
  45     protected InstanceIdentifier<ElanInterface> getWildcardPath() {
  46         return InstanceIdentifier.create(ElanInterfaces.class).child(ElanInterface.class);
  47     }
  48
  49     public void close() throws Exception {
  50         if (registration != null) {
  51             registration.close();
  52         }
  53     }
  54
  55     @Override
  56     public void onDataTreeChanged(Collection<DataTreeModification<ElanInterface>> changes) {
  57         for (DataTreeModification<ElanInterface> change : changes) {
  58             DataObjectModification<ElanInterface> mod = change.getRootNode();
  59             switch (mod.getModificationType()) {
  60                 case DELETE:
  61                     ElanUtils.removeElanInterfaceFromCache(mod.getDataBefore().getName());
  62                     ElanUtils.removeElanInterfaceToElanInstanceCache(mod.getDataBefore().getElanInstanceName(),
  63                             mod.getDataBefore().getName());
  64                     break;
  65                 case SUBTREE_MODIFIED:
  66                 case WRITE:
  67                     ElanInterface elanInterface = mod.getDataAfter();
  68                     ElanUtils.addElanInterfaceIntoCache(elanInterface.getName(), elanInterface);
  69                     ElanUtils.addElanInterfaceToElanInstanceCache(elanInterface.getElanInstanceName(),
  70                             elanInterface.getName());
  71                     break;
  72                 default:
  73                     throw new IllegalArgumentException("Unhandled modification type " + mod.getModificationType());
  74             }
  75         }
  76     }
  77
  78 }