elanmanager/impl/src/main/java/org/opendaylight/netvirt/elan/utils/CacheElanInstanceListener.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 javax.annotation.PostConstruct;
  12 import javax.annotation.PreDestroy;
  13 import javax.inject.Inject;
  14 import javax.inject.Singleton;
  15 import org.opendaylight.controller.md.sal.binding.api.ClusteredDataTreeChangeListener;
  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.DataTreeIdentifier;
  19 import org.opendaylight.controller.md.sal.binding.api.DataTreeModification;
  20 import org.opendaylight.controller.md.sal.common.api.data.LogicalDatastoreType;
  21 import org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.elan.rev150602.ElanInstances;
  22 import org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.elan.rev150602.elan.instances.ElanInstance;
  23 import org.opendaylight.yangtools.concepts.ListenerRegistration;
  24 import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
  25 import org.slf4j.Logger;
  26 import org.slf4j.LoggerFactory;
  27
  28 @Singleton
  29 public class CacheElanInstanceListener implements ClusteredDataTreeChangeListener<ElanInstance> {
  30
  31     private static final Logger LOG = LoggerFactory.getLogger(CacheElanInstanceListener.class);
  32
  33     private final DataBroker broker;
  34
  35     private ListenerRegistration<CacheElanInstanceListener> registration;
  36
  37     @Inject
  38     public CacheElanInstanceListener(DataBroker dataBroker) {
  39         this.broker = dataBroker;
  40     }
  41
  42     @PostConstruct
  43     public void init() {
  44         registerListener();
  45     }
  46
  47     private void registerListener() {
  48         final DataTreeIdentifier<ElanInstance> treeId =
  49                 new DataTreeIdentifier<>(LogicalDatastoreType.CONFIGURATION, getWildcardPath());
  50         LOG.trace("Registering on path: {}", treeId);
  51         registration = broker.registerDataTreeChangeListener(treeId, CacheElanInstanceListener.this);
  52     }
  53
  54     protected InstanceIdentifier<ElanInstance> getWildcardPath() {
  55         return InstanceIdentifier.create(ElanInstances.class).child(ElanInstance.class);
  56     }
  57
  58     @PreDestroy
  59     public void close() throws Exception {
  60         if (registration != null) {
  61             registration.close();
  62         }
  63     }
  64
  65     @Override
  66     public void onDataTreeChanged(Collection<DataTreeModification<ElanInstance>> changes) {
  67         for (DataTreeModification<ElanInstance> change : changes) {
  68             DataObjectModification<ElanInstance> mod = change.getRootNode();
  69             switch (mod.getModificationType()) {
  70                 case DELETE:
  71                     ElanUtils.removeElanInstanceFromCache(mod.getDataBefore().getElanInstanceName());
  72                     break;
  73                 case SUBTREE_MODIFIED:
  74                 case WRITE:
  75                     ElanInstance elanInstance = mod.getDataAfter();
  76                     ElanUtils.addElanInstanceIntoCache(elanInstance.getElanInstanceName(), elanInstance);
  77                     break;
  78                 default:
  79                     throw new IllegalArgumentException("Unhandled modification type " + mod.getModificationType());
  80             }
  81         }
  82     }
  83
  84 }