mappingservice/neutron/src/main/java/org/opendaylight/lispflowmapping/neutron/intenthandler/listener/VppEndpointListener.java

   1 /*
   2  * Copyright (c) 2017 Cisco Systems, Inc.  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.lispflowmapping.neutron.intenthandler.listener;
   9
  10 import com.google.common.base.Function;
  11 import com.google.common.collect.ArrayListMultimap;
  12 import com.google.common.collect.Multimap;
  13 import com.google.common.util.concurrent.FutureCallback;
  14 import com.google.common.util.concurrent.Futures;
  15 import com.google.common.util.concurrent.ListenableFuture;
  16 import com.google.common.util.concurrent.ListeningExecutorService;
  17
  18 import java.util.ArrayList;
  19 import java.util.Collection;
  20 import java.util.List;
  21 import java.util.concurrent.ExecutionException;
  22 import java.util.concurrent.TimeoutException;
  23 import javax.annotation.Nonnull;
  24 import javax.annotation.Nullable;
  25
  26 import org.opendaylight.controller.md.sal.binding.api.ClusteredDataTreeChangeListener;
  27 import org.opendaylight.controller.md.sal.binding.api.DataBroker;
  28 import org.opendaylight.controller.md.sal.binding.api.DataObjectModification;
  29 import org.opendaylight.controller.md.sal.binding.api.DataTreeIdentifier;
  30 import org.opendaylight.controller.md.sal.binding.api.DataTreeModification;
  31 import org.opendaylight.controller.md.sal.binding.api.MountPointService;
  32 import org.opendaylight.controller.md.sal.common.api.data.LogicalDatastoreType;
  33 import org.opendaylight.lispflowmapping.lisp.util.LispAddressUtil;
  34 import org.opendaylight.lispflowmapping.neutron.intenthandler.IntentHandlerAsyncExecutorProvider;
  35 import org.opendaylight.lispflowmapping.neutron.intenthandler.util.VppNetconfConnectionProbe;
  36 import org.opendaylight.lispflowmapping.neutron.intenthandler.util.VppNodeReader;
  37 import org.opendaylight.lispflowmapping.neutron.mappingmanager.HostInformationManager;
  38 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.NetworkTopology;
  39 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.NodeId;
  40 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.TopologyId;
  41 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.network.topology.Topology;
  42 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.network.topology.TopologyKey;
  43 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.network.topology.topology.Node;
  44 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.network.topology.topology.NodeKey;
  45 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.node.attributes.SupportingNode;
  46 import org.opendaylight.yangtools.concepts.ListenerRegistration;
  47 import org.opendaylight.yangtools.yang.binding.DataObject;
  48 import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
  49 import org.opendaylight.yangtools.yang.binding.KeyedInstanceIdentifier;
  50 import org.slf4j.Logger;
  51 import org.slf4j.LoggerFactory;
  52
  53 /**
  54  * Created by Shakib Ahmed on 1/11/17.
  55  */
  56 public class VppEndpointListener implements AutoCloseable, ClusteredDataTreeChangeListener<Topology> {
  57     private static final Logger LOG = LoggerFactory.getLogger(VppEndpointListener.class);
  58
  59     private final DataBroker dataBroker;
  60     private final MountPointService mountService;
  61     private final ListenerRegistration<?> reg;
  62
  63     private final VppNodeReader vppNodeReader;
  64     private final HostInformationManager hostInformationManager;
  65
  66     private final Multimap<NodeId, KeyedInstanceIdentifier<Node, NodeKey>> nodeIdToKeyedInstanceIdentifierMap =
  67             ArrayListMultimap.create();
  68
  69     private final ListeningExecutorService executorService;
  70
  71     public VppEndpointListener(final DataBroker dataBroker,
  72                                final MountPointService mountPointService,
  73                                KeyedInstanceIdentifier<Topology, TopologyKey> topologyII) {
  74
  75         this.dataBroker = dataBroker;
  76         this.mountService = mountPointService;
  77
  78         vppNodeReader = new VppNodeReader(this.dataBroker, this.mountService);
  79
  80         hostInformationManager = HostInformationManager.getInstance();
  81
  82         reg = dataBroker.registerDataTreeChangeListener(
  83                 new DataTreeIdentifier<>(LogicalDatastoreType.CONFIGURATION, topologyII), this);
  84
  85         executorService = IntentHandlerAsyncExecutorProvider.getInstace().getExecutor();
  86     }
  87
  88     @Override
  89     public void onDataTreeChanged(@Nonnull Collection<DataTreeModification<Topology>> changes) {
  90         for (DataTreeModification<Topology> change : changes) {
  91             final DataObjectModification<Topology> modification = change.getRootNode();
  92             ListenableFuture<Void> modificationTaskHandler;
  93             switch (modification.getModificationType()) {
  94                 case WRITE:
  95                     modificationTaskHandler = handleChange(modification);
  96                     break;
  97                 case SUBTREE_MODIFIED:
  98                     modificationTaskHandler = handleChange(modification);
  99                     break;
 100                 case DELETE:
 101                     modificationTaskHandler = handleDeleteOnTopology();
 102                     break;
 103                 default:
 104                     LOG.warn("Ignored topology modification {}", modification);
 105                     modificationTaskHandler = Futures.immediateFuture(null);
 106                     break;
 107             }
 108             Futures.addCallback(modificationTaskHandler, new FutureCallback<Void>() {
 109                 @Override
 110                 public void onSuccess(@Nullable Void vd) {
 111                     LOG.debug("VppEndpoint modification handled successfully!");
 112                 }
 113
 114                 @Override
 115                 public void onFailure(Throwable throwable) {
 116                     LOG.debug("Failed to handle VppEndpoint modifications!");
 117                 }
 118             });
 119         }
 120     }
 121
 122     private ListenableFuture<Void> handleChange(DataObjectModification modification) {
 123         Collection<DataObjectModification<? extends DataObject>> modifiedChildren = modification.getModifiedChildren();
 124         List<ListenableFuture<KeyedInstanceIdentifier<Node, NodeKey>>> processingTasks = new ArrayList<>();
 125         for (DataObjectModification modifiedNode : modifiedChildren) {
 126             final Node newOrModifiedNode = (Node) modifiedNode.getDataAfter();
 127             ListenableFuture<KeyedInstanceIdentifier<Node, NodeKey>> processingTask = processNode(newOrModifiedNode);
 128             Futures.addCallback(processingTask, new FutureCallback<KeyedInstanceIdentifier<Node, NodeKey>>() {
 129                 @Override
 130                 public void onSuccess(@Nullable KeyedInstanceIdentifier<Node, NodeKey> kiiToNode) {
 131                     hostInformationManager.addHostRelatedInfo(newOrModifiedNode.getNodeId().getValue(),
 132                             LispAddressUtil.toRloc(vppNodeReader.rlocIpOfNode(kiiToNode)));
 133                 }
 134
 135                 @Override
 136                 public void onFailure(Throwable throwable) {
 137                     LOG.debug("Couldn't process {}", newOrModifiedNode.getNodeId().getValue());
 138                 }
 139             });
 140             processingTasks.add(processNode(newOrModifiedNode));
 141         }
 142         return Futures.immediateFuture(null);
 143     }
 144
 145     private ListenableFuture<KeyedInstanceIdentifier<Node, NodeKey>> processNode(final Node newOrModifiedNode) {
 146         ListenableFuture<Void> probeVppNodeForConnection = executorService
 147                 .submit(() -> {
 148                     processNodeOnConnection(newOrModifiedNode);
 149                     return null;
 150                 });
 151
 152         return Futures.transform(probeVppNodeForConnection,
 153                 new Function<Void, KeyedInstanceIdentifier<Node, NodeKey>>() {
 154                     @Nullable
 155                     @Override
 156                     public KeyedInstanceIdentifier<Node, NodeKey> apply(@Nullable Void vd) {
 157                         return nodeIdToKeyedInstanceIdentifierMap.get(newOrModifiedNode.getNodeId()).iterator().next();
 158                     }
 159                 });
 160     }
 161
 162     private void processNodeOnConnection(final Node newOrModifiedNode) {
 163         for (SupportingNode supportingNode : newOrModifiedNode.getSupportingNode()) {
 164             final NodeId nodeMount = supportingNode.getNodeRef();
 165             final VppNetconfConnectionProbe probe = new VppNetconfConnectionProbe(supportingNode.getNodeRef(),
 166                     dataBroker);
 167
 168             try {
 169                 // Verify netconf connection
 170                 boolean connectionReady = probe.startProbing();
 171                 if (connectionReady) {
 172                     LOG.debug("Node {} is connected, creating ...", supportingNode.getNodeRef());
 173                     final TopologyId topologyMount = supportingNode.getTopologyRef();
 174                     final KeyedInstanceIdentifier<Node, NodeKey> iiToVpp =
 175                             InstanceIdentifier.create(NetworkTopology.class)
 176                             .child(Topology.class, new TopologyKey(topologyMount))
 177                             .child(Node.class, new NodeKey(nodeMount));
 178                     nodeIdToKeyedInstanceIdentifierMap.put(newOrModifiedNode.getNodeId(), iiToVpp);
 179                 } else {
 180                     LOG.debug("Failed while connecting to node {}", supportingNode.getNodeRef());
 181                 }
 182             } catch (InterruptedException | ExecutionException e) {
 183                 LOG.warn("Exception while processing node {} ... ", supportingNode.getNodeRef(), e);
 184             } catch (TimeoutException e) {
 185                 LOG.warn("Node {} was not connected within {} seconds. "
 186                                 + "Check node configuration and connectivity to proceed",
 187                         supportingNode.getNodeRef(), VppNetconfConnectionProbe.NODE_CONNECTION_TIMER);
 188             }
 189         }
 190     }
 191
 192     private ListenableFuture<Void> handleDeleteOnTopology() {
 193         //TODO
 194         return Futures.immediateFuture(null);
 195     }
 196
 197     @Override
 198     public void close() {
 199         reg.close();
 200     }
 201 }