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