interfacemanager/interfacemanager-impl/src/main/java/org/opendaylight/genius/interfacemanager/listeners/CacheBridgeEntryConfigListener.java

   1 /*
   2  * Copyright (c) 2016, 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.genius.interfacemanager.listeners;
  10
  11 import java.util.Collection;
  12 import javax.annotation.PreDestroy;
  13 import javax.inject.Inject;
  14 import javax.inject.Singleton;
  15 import org.apache.aries.blueprint.annotation.service.Reference;
  16 import org.opendaylight.genius.interfacemanager.commons.InterfaceMetaUtils;
  17 import org.opendaylight.mdsal.binding.api.ClusteredDataTreeChangeListener;
  18 import org.opendaylight.mdsal.binding.api.DataBroker;
  19 import org.opendaylight.mdsal.binding.api.DataObjectModification;
  20 import org.opendaylight.mdsal.binding.api.DataTreeIdentifier;
  21 import org.opendaylight.mdsal.binding.api.DataTreeModification;
  22 import org.opendaylight.mdsal.common.api.LogicalDatastoreType;
  23 import org.opendaylight.yang.gen.v1.urn.opendaylight.genius.interfacemanager.meta.rev160406.BridgeInterfaceInfo;
  24 import org.opendaylight.yang.gen.v1.urn.opendaylight.genius.interfacemanager.meta.rev160406.bridge._interface.info.BridgeEntry;
  25 import org.opendaylight.yangtools.concepts.ListenerRegistration;
  26 import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
  27 import org.slf4j.Logger;
  28 import org.slf4j.LoggerFactory;
  29
  30 /**
  31  * This class listens for bridgeEntry creation/removal/update in Configuration
  32  * DS and update the bridgeEntryCache as per changes in DS.
  33  *
  34  */
  35 @Singleton
  36 public class CacheBridgeEntryConfigListener implements ClusteredDataTreeChangeListener<BridgeEntry> {
  37
  38     private static final Logger LOG = LoggerFactory.getLogger(CacheBridgeEntryConfigListener.class);
  39
  40     private final InterfaceMetaUtils interfaceMetaUtils;
  41     private final ListenerRegistration<CacheBridgeEntryConfigListener> registration;
  42     private final DataTreeIdentifier<BridgeEntry> treeId = DataTreeIdentifier.create(LogicalDatastoreType.CONFIGURATION,
  43             InstanceIdentifier.create(BridgeInterfaceInfo.class).child(BridgeEntry.class));
  44
  45     @Inject
  46     public CacheBridgeEntryConfigListener(@Reference final DataBroker dataBroker,
  47                                           final InterfaceMetaUtils interfaceMetaUtils) {
  48         LOG.trace("Registering on path: {}", treeId);
  49         this.interfaceMetaUtils = interfaceMetaUtils;
  50         registration = dataBroker.registerDataTreeChangeListener(treeId, CacheBridgeEntryConfigListener.this);
  51     }
  52
  53     @PreDestroy
  54     public void close() {
  55         if (registration != null) {
  56             registration.close();
  57         }
  58     }
  59
  60     @Override
  61     public void onDataTreeChanged(Collection<DataTreeModification<BridgeEntry>> changes) {
  62         for (DataTreeModification<BridgeEntry> change : changes) {
  63             final DataObjectModification<BridgeEntry> mod = change.getRootNode();
  64             switch (mod.getModificationType()) {
  65                 case DELETE:
  66                     if (mod.getDataBefore() != null) {
  67                         interfaceMetaUtils.removeFromBridgeEntryCache(mod.getDataBefore());
  68                     }
  69                     break;
  70                 case SUBTREE_MODIFIED:
  71                 case WRITE:
  72                     interfaceMetaUtils.addBridgeEntryToCache(mod.getDataAfter());
  73                     break;
  74                 default:
  75                     throw new IllegalArgumentException("Unhandled modification type " + mod.getModificationType());
  76             }
  77         }
  78     }
  79 }