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