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