southbound/southbound-impl/src/main/java/org/opendaylight/ovsdb/southbound/OvsdbNodeDataChangeListener.java

   1 /*
   2  * Copyright (c) 2015 Cisco Systems, Inc. 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.ovsdb.southbound;
   9
  10 import java.net.UnknownHostException;
  11 import java.util.Map.Entry;
  12 import java.util.Map;
  13 import java.util.Set;
  14
  15 import org.opendaylight.controller.md.sal.binding.api.DataBroker;
  16 import org.opendaylight.controller.md.sal.binding.api.DataChangeListener;
  17 import org.opendaylight.controller.md.sal.common.api.data.AsyncDataBroker.DataChangeScope;
  18 import org.opendaylight.controller.md.sal.common.api.data.AsyncDataChangeEvent;
  19 import org.opendaylight.controller.md.sal.common.api.data.LogicalDatastoreType;
  20 import org.opendaylight.ovsdb.lib.OvsdbClient;
  21 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.ovsdb.rev150105.OvsdbNodeAugmentation;
  22 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.NetworkTopology;
  23 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.network.topology.Topology;
  24 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.network.topology.TopologyKey;
  25 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.network.topology.topology.Node;
  26 import org.opendaylight.yangtools.concepts.ListenerRegistration;
  27 import org.opendaylight.yangtools.yang.binding.DataObject;
  28 import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
  29 import org.slf4j.Logger;
  30 import org.slf4j.LoggerFactory;
  31
  32 public class OvsdbNodeDataChangeListener implements DataChangeListener, AutoCloseable {
  33
  34     private ListenerRegistration<DataChangeListener> registration;
  35     private OvsdbConnectionManager cm;
  36     private static final Logger LOG = LoggerFactory.getLogger(OvsdbNodeDataChangeListener.class);
  37
  38     OvsdbNodeDataChangeListener(DataBroker db, OvsdbConnectionManager cm) {
  39         LOG.info("Registering OvsdbNodeDataChangeListener");
  40         this.cm = cm;
  41         InstanceIdentifier<OvsdbNodeAugmentation> path = InstanceIdentifier
  42                 .create(NetworkTopology.class)
  43                 .child(Topology.class, new TopologyKey(SouthboundConstants.OVSDB_TOPOLOGY_ID))
  44                 .child(Node.class)
  45                 .augmentation(OvsdbNodeAugmentation.class);
  46         registration =
  47                 db.registerDataChangeListener(LogicalDatastoreType.CONFIGURATION, path, this, DataChangeScope.ONE);
  48
  49     }
  50
  51     @Override
  52     public void onDataChanged(
  53             AsyncDataChangeEvent<InstanceIdentifier<?>, DataObject> changes) {
  54         LOG.info("Received change to ovsdbNode: {}", changes);
  55         for (Entry<InstanceIdentifier<?>, DataObject> created : changes.getCreatedData().entrySet()) {
  56             // TODO validate we have the correct kind of InstanceIdentifier
  57             if (created.getValue() instanceof OvsdbNodeAugmentation) {
  58                 try {
  59                     cm.connect((OvsdbNodeAugmentation) created.getValue());
  60                 } catch (UnknownHostException e) {
  61                     LOG.warn("Failed to connect to ovsdbNode", e);
  62                 }
  63             }
  64         }
  65
  66         Map<InstanceIdentifier<?>, DataObject> originalDataObject = changes.getOriginalData();
  67         Set<InstanceIdentifier<?>> iID = changes.getRemovedPaths();
  68         for (InstanceIdentifier instanceIdentifier : iID) {
  69             if (originalDataObject.get(instanceIdentifier) instanceof OvsdbNodeAugmentation) {
  70                 try {
  71                     cm.disconnect((OvsdbNodeAugmentation) originalDataObject.get(instanceIdentifier));
  72                 } catch (UnknownHostException e) {
  73                     LOG.warn("Failed to disconnect ovsdbNode", e);
  74                 }
  75             }
  76         }
  77
  78         for (Entry<InstanceIdentifier<?>, DataObject> updated : changes.getUpdatedData().entrySet()) {
  79             if (updated.getValue() instanceof OvsdbNodeAugmentation) {
  80                 OvsdbNodeAugmentation value = (OvsdbNodeAugmentation) updated.getValue();
  81                 OvsdbClient client = cm.getClient(value);
  82                 if (client == null) {
  83                     for (Entry<InstanceIdentifier<?>, DataObject> original : changes.getOriginalData().entrySet()) {
  84                         if (original.getValue() instanceof OvsdbNodeAugmentation) {
  85                             try {
  86                                 cm.disconnect((OvsdbNodeAugmentation) original.getValue());
  87                                 cm.connect(value);
  88                             } catch (UnknownHostException e) {
  89                                 LOG.warn("Failed to disconnect to ovsdbNode", e);
  90                             }
  91                         }
  92                     }
  93                 }
  94             }
  95         }
  96     }
  97
  98     @Override
  99     public void close() throws Exception {
 100         registration.close();
 101     }
 102
 103 }