applications/topology-manager/src/main/java/org/opendaylight/openflowplugin/applications/topology/manager/NodeChangeListenerImpl.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.openflowplugin.applications.topology.manager;
   9
  10
  11 import org.opendaylight.controller.md.sal.binding.api.ReadWriteTransaction;
  12 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.network.topology.topology.NodeBuilder;
  13 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.NodeId;
  14 import org.opendaylight.yang.gen.v1.urn.opendaylight.inventory.rev130819.nodes.NodeKey;
  15 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.TopologyId;
  16 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.network.topology.TopologyKey;
  17 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.network.topology.Topology;
  18 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.NetworkTopology;
  19 import org.slf4j.Logger;
  20 import org.slf4j.LoggerFactory;
  21 import java.util.Map.Entry;
  22 import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.inventory.rev130819.FlowCapableNode;
  23 import org.opendaylight.yang.gen.v1.urn.opendaylight.inventory.rev130819.nodes.Node;
  24 import org.opendaylight.yang.gen.v1.urn.opendaylight.inventory.rev130819.Nodes;
  25 import org.opendaylight.controller.md.sal.common.api.data.LogicalDatastoreType;
  26 import org.opendaylight.yangtools.concepts.ListenerRegistration;
  27 import java.util.Map;
  28 import java.util.Set;
  29 import org.opendaylight.controller.md.sal.binding.api.DataChangeListener;
  30 import org.opendaylight.controller.md.sal.binding.api.DataBroker;
  31 import org.opendaylight.controller.md.sal.common.api.data.AsyncDataChangeEvent;
  32 import org.opendaylight.yangtools.yang.binding.DataObject;
  33 import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
  34 import org.opendaylight.controller.md.sal.common.api.data.AsyncDataBroker;
  35
  36 public class NodeChangeListenerImpl implements DataChangeListener, AutoCloseable {
  37     private final static Logger LOG = LoggerFactory.getLogger(NodeChangeListenerImpl.class);
  38
  39     private final static String topologyId = "topology id";
  40
  41     /**
  42      * instance identifier to Node in network topology model (yangtools)
  43      */
  44     private static final InstanceIdentifier<Topology> II_TO_TOPOLOGY =
  45             InstanceIdentifier
  46             .builder(NetworkTopology.class)
  47             .child(Topology.class, new TopologyKey(new TopologyId(topologyId)))
  48             .build();
  49
  50     private final ListenerRegistration<DataChangeListener> dataChangeListenerRegistration;
  51     private OperationProcessor operationProcessor;
  52
  53     public NodeChangeListenerImpl(final DataBroker dataBroker, final OperationProcessor operationProcessor) {
  54         //TODO: listener on FlowCapableNode. what if node id in Node.class is changed (it won't be caught by this listener)
  55         dataChangeListenerRegistration = dataBroker.registerDataChangeListener(LogicalDatastoreType.OPERATIONAL,
  56                 InstanceIdentifier.builder(Nodes.class).child(Node.class).augmentation(FlowCapableNode.class).build(),
  57                 this, AsyncDataBroker.DataChangeScope.BASE);
  58         this.operationProcessor = operationProcessor;
  59     }
  60
  61     @Override
  62     public void onDataChanged(AsyncDataChangeEvent<InstanceIdentifier<?>, DataObject> change) {
  63         processAddedNode(change.getCreatedData());
  64         processUpdatedNode(change.getUpdatedData());
  65         processRemovedNode(change.getRemovedPaths());
  66     }
  67
  68     /**
  69      * @param removedPaths
  70      */
  71     private void processRemovedNode(Set<InstanceIdentifier<?>> removedNodes) {
  72         for (final InstanceIdentifier<?> removedNode : removedNodes) {
  73             operationProcessor.enqueueOperation(new TopologyOperation() {
  74
  75                 @Override
  76                 public void applyOperation(ReadWriteTransaction transaction) {
  77                     transaction.delete(LogicalDatastoreType.OPERATIONAL, removedNode);
  78                 }
  79             });
  80         }
  81     }
  82
  83     /**
  84      * @param updatedData
  85      */
  86     private void processUpdatedNode(Map<InstanceIdentifier<?>, DataObject> updatedData) {
  87         //TODO: only node id is used from incomming data object.
  88         //if it is changed what should happen? Listener is on FlocCapableNode so change
  89         //of node id (only data which are used) isn't caught.
  90     }
  91
  92     /**
  93      * @param createdData
  94      */
  95     private void processAddedNode(Map<InstanceIdentifier<?>, DataObject> addedDatas) {
  96         for (Entry<InstanceIdentifier<?>, DataObject> addedData : addedDatas.entrySet()) {
  97             if (addedData.getValue() instanceof FlowCapableNode) {
  98                 createNewNodeInTopology(addedData.getKey(), (FlowCapableNode) (addedData.getValue()));
  99             } else {
 100                 LOG.debug("Expected data of type FlowCapableNode but {} was obtainedl", addedData.getClass().getName());
 101             }
 102         }
 103
 104     }
 105
 106     /**
 107      * @param iiToNodeInInventory
 108      * @param addedData
 109      */
 110     private void createNewNodeInTopology(InstanceIdentifier<?> iiToNodeInInventory, final FlowCapableNode addedData) {
 111         final NodeBuilder topologyNodeBuilder = new NodeBuilder();
 112         final NodeKey inventoryNodeKey = iiToNodeInInventory.firstKeyOf(Node.class, NodeKey.class);
 113         if (inventoryNodeKey != null) {
 114             NodeId nodeIdInTopology = new NodeId(inventoryNodeKey.getId().getValue());
 115             org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.network.topology.topology.NodeKey nodeKeyInTopology = new org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.network.topology.topology.NodeKey(nodeIdInTopology);
 116             topologyNodeBuilder.setNodeId(nodeIdInTopology);
 117
 118             final InstanceIdentifier<org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.network.topology.topology.Node> iiToTopologyNode = II_TO_TOPOLOGY
 119             .builder()
 120             .child(org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.network.topology.topology.Node.class, nodeKeyInTopology)
 121             .build();
 122
 123             operationProcessor.enqueueOperation(new TopologyOperation() {
 124
 125                 @Override
 126                 public void applyOperation(ReadWriteTransaction transaction) {
 127                     transaction.put(LogicalDatastoreType.OPERATIONAL, iiToTopologyNode, topologyNodeBuilder.build());
 128                 }
 129             });
 130         } else {
 131             LOG.debug("Inventory node key is null. Data can't be written to topology");
 132         }
 133
 134     }
 135
 136     @Override
 137     public void close() throws Exception {
 138         dataChangeListenerRegistration.close();
 139     }
 140
 141 }