interfacemanager/interfacemanager-impl/src/main/java/org/opendaylight/genius/interfacemanager/listeners/CacheBridgeRefEntryListener.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.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.genius.interfacemanager.commons.InterfaceMetaUtils;
  22 import org.opendaylight.yang.gen.v1.urn.opendaylight.genius.interfacemanager.meta.rev160406.BridgeRefInfo;
  23 import org.opendaylight.yang.gen.v1.urn.opendaylight.genius.interfacemanager.meta.rev160406.bridge.ref.info.BridgeRefEntry;
  24 import org.opendaylight.yangtools.concepts.ListenerRegistration;
  25 import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
  26 import org.slf4j.Logger;
  27 import org.slf4j.LoggerFactory;
  28
  29 /**
  30  * This class listens for bridgeRefEntry creation/removal/update in Operational
  31  * DS and update the bridgeRefEntryCache as per changes in DS.
  32  *
  33  */
  34 @Singleton
  35 public class CacheBridgeRefEntryListener implements ClusteredDataTreeChangeListener<BridgeRefEntry> {
  36     private static final Logger LOG = LoggerFactory.getLogger(CacheBridgeRefEntryListener.class);
  37
  38     private final ListenerRegistration<CacheBridgeRefEntryListener> registration;
  39     private final DataTreeIdentifier<BridgeRefEntry> treeId = new DataTreeIdentifier<>(LogicalDatastoreType.OPERATIONAL,
  40             getWildcardPath());
  41
  42     @Inject
  43     public CacheBridgeRefEntryListener(DataBroker dataBroker) {
  44         LOG.trace("Registering on path: {}", treeId);
  45         registration = dataBroker.registerDataTreeChangeListener(treeId, CacheBridgeRefEntryListener.this);
  46     }
  47
  48     @PreDestroy
  49     public void close() {
  50         if (registration != null) {
  51             registration.close();
  52         }
  53     }
  54
  55     protected InstanceIdentifier<BridgeRefEntry> getWildcardPath() {
  56         return InstanceIdentifier.create(BridgeRefInfo.class).child(BridgeRefEntry.class);
  57     }
  58
  59     @Override
  60     public void onDataTreeChanged(Collection<DataTreeModification<BridgeRefEntry>> changes) {
  61         for (DataTreeModification<BridgeRefEntry> change : changes) {
  62             final DataObjectModification<BridgeRefEntry> mod = change.getRootNode();
  63             switch (mod.getModificationType()) {
  64                 case DELETE:
  65                     /*
  66                      * Note: Do we want to retain entry in cache? Ref Entry missing
  67                      * means OVS being disconnected for now. It will either come
  68                      * back, or will require config to be deleted.
  69                      *
  70                      * Removing for now, can consider this as future optimization.
  71                      *
  72                      */
  73                     InterfaceMetaUtils.removeFromBridgeRefEntryCache(mod.getDataBefore());
  74                     break;
  75                 case SUBTREE_MODIFIED:
  76                 case WRITE:
  77                     InterfaceMetaUtils.addBridgeRefEntryToCache(mod.getDataAfter());
  78                     break;
  79                 default:
  80                     throw new IllegalArgumentException("Unhandled modification type " + mod.getModificationType());
  81             }
  82         }
  83     }
  84 }