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