southbound/southbound-impl/src/main/java/org/opendaylight/ovsdb/southbound/OvsdbDataChangeListener.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
   9 package org.opendaylight.ovsdb.southbound;
  10
  11 import java.net.UnknownHostException;
  12 import java.util.HashMap;
  13 import java.util.List;
  14 import java.util.Map;
  15 import java.util.Map.Entry;
  16 import java.util.Set;
  17
  18 import org.opendaylight.controller.md.sal.binding.api.DataBroker;
  19 import org.opendaylight.controller.md.sal.binding.api.DataChangeListener;
  20 import org.opendaylight.controller.md.sal.common.api.data.AsyncDataBroker.DataChangeScope;
  21 import org.opendaylight.controller.md.sal.common.api.data.AsyncDataChangeEvent;
  22 import org.opendaylight.controller.md.sal.common.api.data.LogicalDatastoreType;
  23 import org.opendaylight.ovsdb.lib.OvsdbClient;
  24 import org.opendaylight.ovsdb.southbound.ovsdb.transact.BridgeOperationalState;
  25 import org.opendaylight.ovsdb.southbound.ovsdb.transact.DataChangesManagedByOvsdbNodeEvent;
  26 import org.opendaylight.ovsdb.southbound.ovsdb.transact.TransactCommandAggregator;
  27 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.ovsdb.rev150105.OvsdbBridgeAugmentation;
  28 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.ovsdb.rev150105.OvsdbNodeAugmentation;
  29 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.NetworkTopology;
  30 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.network.topology.Topology;
  31 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.network.topology.TopologyKey;
  32 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.network.topology.topology.Node;
  33 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.network.topology.topology.node.TerminationPoint;
  34 import org.opendaylight.yangtools.concepts.ListenerRegistration;
  35 import org.opendaylight.yangtools.yang.binding.DataObject;
  36 import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
  37 import org.slf4j.Logger;
  38 import org.slf4j.LoggerFactory;
  39
  40 import com.google.common.base.Preconditions;
  41 import com.google.common.base.Predicates;
  42 import com.google.common.collect.Maps;
  43
  44 public class OvsdbDataChangeListener implements DataChangeListener, AutoCloseable {
  45
  46     private ListenerRegistration<DataChangeListener> registration;
  47     private OvsdbConnectionManager cm;
  48     private DataBroker db;
  49     private static final Logger LOG = LoggerFactory.getLogger(OvsdbDataChangeListener.class);
  50
  51     OvsdbDataChangeListener(DataBroker db, OvsdbConnectionManager cm) {
  52         LOG.info("Registering OvsdbNodeDataChangeListener");
  53         this.cm = cm;
  54         this.db = db;
  55         InstanceIdentifier<Node> path = InstanceIdentifier
  56                 .create(NetworkTopology.class)
  57                 .child(Topology.class, new TopologyKey(SouthboundConstants.OVSDB_TOPOLOGY_ID))
  58                 .child(Node.class);
  59         registration =
  60                 db.registerDataChangeListener(LogicalDatastoreType.CONFIGURATION, path, this, DataChangeScope.SUBTREE);
  61
  62     }
  63
  64     @Override
  65     public void close() throws Exception {
  66         registration.close();
  67     }
  68
  69     @Override
  70     public void onDataChanged(
  71             AsyncDataChangeEvent<InstanceIdentifier<?>, DataObject> changes) {
  72         LOG.trace("onDataChanged: {}", changes);
  73         // Connect first if we have to:
  74         connect(changes);
  75
  76         // Second update connections if we have to
  77         updateConnections(changes);
  78
  79         // Then handle updates to the actual data
  80         updateData(changes);
  81
  82         // Finally disconnect if we need to
  83         disconnect(changes);
  84
  85         init(changes);
  86
  87         LOG.trace("onDataChanged: exit");
  88     }
  89
  90     private void updateData(
  91             AsyncDataChangeEvent<InstanceIdentifier<?>, DataObject> changes) {
  92         for (Entry<InstanceIdentifier<Node>, OvsdbConnectionInstance> connectionInstanceEntry :
  93                 connectionInstancesFromChanges(changes).entrySet()) {
  94             OvsdbConnectionInstance connectionInstance = connectionInstanceEntry.getValue();
  95             connectionInstance.transact(new TransactCommandAggregator(
  96                     new BridgeOperationalState(db, changes),
  97                     new DataChangesManagedByOvsdbNodeEvent(
  98                             connectionInstance.getInstanceIdentifier(),
  99                             changes)));
 100         }
 101     }
 102
 103     private void disconnect(
 104             AsyncDataChangeEvent<InstanceIdentifier<?>, DataObject> changes) {
 105         Map<InstanceIdentifier<?>, DataObject> originalDataObject = changes.getOriginalData();
 106         Set<InstanceIdentifier<?>> iiD = changes.getRemovedPaths();
 107         for (InstanceIdentifier instanceIdentifier : iiD) {
 108             if (originalDataObject.get(instanceIdentifier) instanceof OvsdbNodeAugmentation) {
 109                 try {
 110                     cm.disconnect((OvsdbNodeAugmentation) originalDataObject.get(instanceIdentifier));
 111                 } catch (UnknownHostException e) {
 112                     LOG.warn("Failed to disconnect ovsdbNode", e);
 113                 }
 114             }
 115         }
 116     }
 117
 118     private void updateConnections(
 119             AsyncDataChangeEvent<InstanceIdentifier<?>, DataObject> changes) {
 120         for (Entry<InstanceIdentifier<?>, DataObject> updated : changes.getUpdatedData().entrySet()) {
 121             if (updated.getValue() instanceof OvsdbNodeAugmentation) {
 122                 OvsdbNodeAugmentation value = (OvsdbNodeAugmentation) updated.getValue();
 123                 OvsdbClient client = cm.getClient(value.getConnectionInfo());
 124                 if (client == null) {
 125                     for (Entry<InstanceIdentifier<?>, DataObject> original : changes.getOriginalData().entrySet()) {
 126                         if (original.getValue() instanceof OvsdbNodeAugmentation) {
 127                             try {
 128                                 cm.disconnect((OvsdbNodeAugmentation) original.getValue());
 129                                 cm.connect((InstanceIdentifier<Node>) original.getKey(),value);
 130                             } catch (UnknownHostException e) {
 131                                 LOG.warn("Failed to disconnect to ovsdbNode", e);
 132                             }
 133                         }
 134                     }
 135                 }
 136             }
 137         }
 138     }
 139
 140     private void connect(
 141             AsyncDataChangeEvent<InstanceIdentifier<?>, DataObject> changes) {
 142         for (Entry<InstanceIdentifier<?>, DataObject> created : changes.getCreatedData().entrySet()) {
 143             // TODO validate we have the correct kind of InstanceIdentifier
 144             if (created.getValue() instanceof OvsdbNodeAugmentation) {
 145                 try {
 146                     cm.connect((InstanceIdentifier<Node>) created.getKey(),
 147                             (OvsdbNodeAugmentation) created.getValue());
 148                 } catch (UnknownHostException e) {
 149                     LOG.warn("Failed to connect to ovsdbNode", e);
 150                 }
 151             }
 152         }
 153     }
 154
 155     private void init(
 156             AsyncDataChangeEvent<InstanceIdentifier<?>, DataObject> changes) {
 157         for (Entry<InstanceIdentifier<?>, DataObject> created : changes.getCreatedData().entrySet()) {
 158             if (created.getValue() instanceof OvsdbNodeAugmentation) {
 159                 OvsdbNodeAugmentation ovsdbNode = (OvsdbNodeAugmentation)created.getValue();
 160                 cm.init(ovsdbNode.getConnectionInfo());
 161             }
 162         }
 163
 164     }
 165
 166     public Map<InstanceIdentifier<Node>,OvsdbConnectionInstance> connectionInstancesFromChanges(
 167             AsyncDataChangeEvent<InstanceIdentifier<?>, DataObject> changes) {
 168         Map<InstanceIdentifier<Node>,OvsdbConnectionInstance> result =
 169                 new HashMap<InstanceIdentifier<Node>,OvsdbConnectionInstance>();
 170         result.putAll(connectionInstancesFromMap(changes.getCreatedData()));
 171         result.putAll(connectionInstancesFromMap(changes.getUpdatedData()));
 172         result.putAll(connectionInstancesFromMap(
 173                 Maps.filterKeys(changes.getOriginalData(), Predicates.in(changes.getRemovedPaths()))));
 174         return result;
 175     }
 176
 177     public Map<InstanceIdentifier<Node>,OvsdbConnectionInstance> connectionInstancesFromMap(Map<InstanceIdentifier<?>,
 178             DataObject> map) {
 179         Preconditions.checkNotNull(map);
 180         Map<InstanceIdentifier<Node>,OvsdbConnectionInstance> result =
 181                 new HashMap<InstanceIdentifier<Node>,OvsdbConnectionInstance>();
 182         for ( Entry<InstanceIdentifier<?>, DataObject> created : map.entrySet()) {
 183             if (created.getValue() instanceof Node) {
 184                 OvsdbConnectionInstance client = null;
 185                 LOG.debug("Received request for {}",created.getValue());
 186                 OvsdbBridgeAugmentation bridge =
 187                         ((Node)created.getValue()).getAugmentation(OvsdbBridgeAugmentation.class);
 188                 if (bridge != null) {
 189                     client = cm.getConnectionInstance(bridge);
 190                 } else {
 191                     OvsdbNodeAugmentation ovsNode =
 192                             ((Node)created.getValue()).getAugmentation(OvsdbNodeAugmentation.class);
 193                     if (ovsNode != null && ovsNode.getConnectionInfo() != null) {
 194                         client = cm.getConnectionInstance(ovsNode.getConnectionInfo());
 195                     } else {
 196                         List<TerminationPoint> terminationPoint = ((Node)created.getValue()).getTerminationPoint();
 197                         if (!terminationPoint.isEmpty()) {
 198                             InstanceIdentifier<Node> nodeIid = SouthboundMapper.
 199                                     createInstanceIdentifier(((Node)created.getValue()).getNodeId());
 200                             client = cm.getConnectionInstance(nodeIid);
 201                         }
 202                     }
 203                 }
 204                 if (client != null) {
 205                     LOG.debug("Found client for {}", created.getValue());
 206                     result.put((InstanceIdentifier<Node>) created.getKey(), client);
 207                 } else {
 208                     LOG.debug("Did not find client for {}",created.getValue());
 209                 }
 210             }
 211         }
 212         return result;
 213     }
 214
 215 }