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

   1 package org.opendaylight.ovsdb.southbound;
   2
   3 import java.net.UnknownHostException;
   4 import java.util.HashSet;
   5 import java.util.Map;
   6 import java.util.Map.Entry;
   7 import java.util.Set;
   8
   9 import org.opendaylight.controller.md.sal.binding.api.DataBroker;
  10 import org.opendaylight.controller.md.sal.binding.api.DataChangeListener;
  11 import org.opendaylight.controller.md.sal.common.api.data.AsyncDataBroker.DataChangeScope;
  12 import org.opendaylight.controller.md.sal.common.api.data.AsyncDataChangeEvent;
  13 import org.opendaylight.controller.md.sal.common.api.data.LogicalDatastoreType;
  14 import org.opendaylight.ovsdb.lib.OvsdbClient;
  15 import org.opendaylight.ovsdb.southbound.ovsdb.transact.DataChangesManagedByOvsdbNodeEvent;
  16 import org.opendaylight.ovsdb.southbound.ovsdb.transact.TransactCommandAggregator;
  17 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.ovsdb.rev150105.OvsdbBridgeAugmentation;
  18 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.ovsdb.rev150105.OvsdbNodeAugmentation;
  19 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.NetworkTopology;
  20 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.network.topology.Topology;
  21 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.network.topology.TopologyKey;
  22 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.network.topology.topology.Node;
  23 import org.opendaylight.yangtools.concepts.ListenerRegistration;
  24 import org.opendaylight.yangtools.yang.binding.DataObject;
  25 import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
  26 import org.slf4j.Logger;
  27 import org.slf4j.LoggerFactory;
  28
  29 import com.google.common.base.Preconditions;
  30 import com.google.common.base.Predicates;
  31 import com.google.common.collect.Maps;
  32
  33 public class OvsdbDataChangeListener implements DataChangeListener, AutoCloseable {
  34
  35     private ListenerRegistration<DataChangeListener> registration;
  36     private OvsdbConnectionManager cm;
  37     private DataBroker db;
  38     private static final Logger LOG = LoggerFactory.getLogger(OvsdbDataChangeListener.class);
  39
  40     OvsdbDataChangeListener(DataBroker db, OvsdbConnectionManager cm) {
  41         LOG.info("Registering OvsdbNodeDataChangeListener");
  42         this.cm = cm;
  43         this.db = db;
  44         InstanceIdentifier<Node> path = InstanceIdentifier
  45                 .create(NetworkTopology.class)
  46                 .child(Topology.class, new TopologyKey(SouthboundConstants.OVSDB_TOPOLOGY_ID))
  47                 .child(Node.class);
  48         registration =
  49                 db.registerDataChangeListener(LogicalDatastoreType.CONFIGURATION, path, this, DataChangeScope.SUBTREE);
  50
  51     }
  52
  53     @Override
  54     public void close() throws Exception {
  55         registration.close();
  56     }
  57
  58     @Override
  59     public void onDataChanged(
  60             AsyncDataChangeEvent<InstanceIdentifier<?>, DataObject> changes) {
  61         // Connect first if we have to:
  62         connect(changes);
  63
  64         // Second update connections if we have to
  65         updateConnections(changes);
  66
  67         // Then handle updates to the actual data
  68         updateData(changes);
  69
  70         // Finally disconnect if we need to
  71         disconnect(changes);
  72
  73     }
  74
  75     private void updateData(
  76             AsyncDataChangeEvent<InstanceIdentifier<?>, DataObject> changes) {
  77         for (OvsdbConnectionInstance connectionInstance : connectionInstancesFromChanges(changes)) {
  78             connectionInstance.transact(new TransactCommandAggregator(
  79                     db,
  80                     new DataChangesManagedByOvsdbNodeEvent(
  81                             SouthboundMapper.createInstanceIdentifier(connectionInstance.getKey()),
  82                             changes)));
  83         }
  84     }
  85
  86     private void disconnect(
  87             AsyncDataChangeEvent<InstanceIdentifier<?>, DataObject> changes) {
  88         Map<InstanceIdentifier<?>, DataObject> originalDataObject = changes.getOriginalData();
  89         Set<InstanceIdentifier<?>> iiD = changes.getRemovedPaths();
  90         for (InstanceIdentifier instanceIdentifier : iiD) {
  91             if (originalDataObject.get(instanceIdentifier) instanceof OvsdbNodeAugmentation) {
  92                 try {
  93                     cm.disconnect((OvsdbNodeAugmentation) originalDataObject.get(instanceIdentifier));
  94                 } catch (UnknownHostException e) {
  95                     LOG.warn("Failed to disconnect ovsdbNode", e);
  96                 }
  97             }
  98         }
  99     }
 100
 101     private void updateConnections(
 102             AsyncDataChangeEvent<InstanceIdentifier<?>, DataObject> changes) {
 103         for (Entry<InstanceIdentifier<?>, DataObject> updated : changes.getUpdatedData().entrySet()) {
 104             if (updated.getValue() instanceof OvsdbNodeAugmentation) {
 105                 OvsdbNodeAugmentation value = (OvsdbNodeAugmentation) updated.getValue();
 106                 OvsdbClient client = cm.getClient(value);
 107                 if (client == null) {
 108                     for (Entry<InstanceIdentifier<?>, DataObject> original : changes.getOriginalData().entrySet()) {
 109                         if (original.getValue() instanceof OvsdbNodeAugmentation) {
 110                             try {
 111                                 cm.disconnect((OvsdbNodeAugmentation) original.getValue());
 112                                 cm.connect(value);
 113                             } catch (UnknownHostException e) {
 114                                 LOG.warn("Failed to disconnect to ovsdbNode", e);
 115                             }
 116                         }
 117                     }
 118                 }
 119             }
 120         }
 121     }
 122
 123     private void connect(
 124             AsyncDataChangeEvent<InstanceIdentifier<?>, DataObject> changes) {
 125         for (Entry<InstanceIdentifier<?>, DataObject> created : changes.getCreatedData().entrySet()) {
 126             // TODO validate we have the correct kind of InstanceIdentifier
 127             if (created.getValue() instanceof OvsdbNodeAugmentation) {
 128                 try {
 129                     cm.connect((OvsdbNodeAugmentation) created.getValue());
 130                 } catch (UnknownHostException e) {
 131                     LOG.warn("Failed to connect to ovsdbNode", e);
 132                 }
 133             }
 134         }
 135     }
 136
 137     public Set<OvsdbConnectionInstance> connectionInstancesFromChanges(
 138             AsyncDataChangeEvent<InstanceIdentifier<?>, DataObject> changes) {
 139         Set<OvsdbConnectionInstance> result = new HashSet<OvsdbConnectionInstance>();
 140         result.addAll(connectionInstancesFromMap(changes.getCreatedData()));
 141         result.addAll(connectionInstancesFromMap(changes.getUpdatedData()));
 142         result.addAll(connectionInstancesFromMap(
 143                 Maps.filterKeys(changes.getOriginalData(), Predicates.in(changes.getRemovedPaths()))));
 144         return result;
 145     }
 146
 147     public Set<OvsdbConnectionInstance> connectionInstancesFromMap(Map<InstanceIdentifier<?>, DataObject> map) {
 148         Preconditions.checkNotNull(map);
 149         Set<OvsdbConnectionInstance> result = new HashSet<OvsdbConnectionInstance>();
 150         for ( Entry<InstanceIdentifier<?>, DataObject> created : map.entrySet()) {
 151             if (created.getValue() instanceof Node) {
 152                 LOG.debug("Received request to create {}",created.getValue());
 153                 OvsdbBridgeAugmentation bridge =
 154                         ((Node)created.getValue()).getAugmentation(OvsdbBridgeAugmentation.class);
 155                 if (bridge != null) {
 156                     OvsdbConnectionInstance client = cm.getConnectionInstance(bridge);
 157                     if (client != null) {
 158                         LOG.debug("Found client for {}", created.getValue());
 159                         result.add(client);
 160                     } else {
 161                         LOG.debug("Did not find client for {}",created.getValue());
 162                     }
 163                 }
 164             }
 165         }
 166         return result;
 167     }
 168
 169 }