pcep/server/server-provider/src/main/java/org/opendaylight/bgpcep/pcep/server/provider/DefaultPceServerProvider.java

   1 /*
   2  * Copyright (c) 2020 Orange. 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.bgpcep.pcep.server.provider;
   9
  10 import static java.util.Objects.requireNonNull;
  11
  12 import java.util.HashMap;
  13 import java.util.Map;
  14 import javax.annotation.PreDestroy;
  15 import javax.inject.Inject;
  16 import javax.inject.Singleton;
  17 import org.eclipse.jdt.annotation.Nullable;
  18 import org.opendaylight.algo.PathComputationProvider;
  19 import org.opendaylight.bgpcep.pcep.server.PathComputation;
  20 import org.opendaylight.bgpcep.pcep.server.PceServerProvider;
  21 import org.opendaylight.graph.ConnectedGraph;
  22 import org.opendaylight.graph.ConnectedGraphProvider;
  23 import org.opendaylight.mdsal.binding.api.DataBroker;
  24 import org.opendaylight.mdsal.binding.api.RpcConsumerRegistry;
  25 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.graph.rev220720.graph.topology.GraphKey;
  26 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.TopologyId;
  27 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.network.topology.Topology;
  28 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.network.topology.TopologyKey;
  29 import org.opendaylight.yangtools.yang.binding.KeyedInstanceIdentifier;
  30 import org.osgi.service.component.annotations.Activate;
  31 import org.osgi.service.component.annotations.Component;
  32 import org.osgi.service.component.annotations.Deactivate;
  33 import org.osgi.service.component.annotations.Reference;
  34 import org.slf4j.Logger;
  35 import org.slf4j.LoggerFactory;
  36
  37
  38 @Singleton
  39 @Component(immediate = true)
  40 public final class DefaultPceServerProvider implements PceServerProvider, AutoCloseable {
  41     private static final Logger LOG = LoggerFactory.getLogger(DefaultPceServerProvider.class);
  42     private final ConnectedGraphProvider graphProvider;
  43     private final PathComputationProvider algoProvider;
  44     private final DataBroker dataBroker;
  45     private final RpcConsumerRegistry rpcRegistry;
  46     private Map<TopologyId, PathManagerProvider> pathManagers = new HashMap<TopologyId, PathManagerProvider>();
  47     private Map<TopologyId, PathManagerListener> pathListeners = new HashMap<TopologyId, PathManagerListener>();
  48     private Map<TopologyId, PcepTopologyListener> pcepListeners = new HashMap<TopologyId, PcepTopologyListener>();
  49     private volatile ConnectedGraph tedGraph;
  50     private volatile GraphKey graphKey;
  51
  52     @Inject
  53     @Activate
  54     public DefaultPceServerProvider(@Reference final ConnectedGraphProvider graphProvider,
  55             @Reference final PathComputationProvider pathComputationProvider,
  56             @Reference final DataBroker dataBroker,
  57             @Reference final RpcConsumerRegistry rpcConsumerRegistry) {
  58         this.graphProvider = requireNonNull(graphProvider);
  59         this.algoProvider = requireNonNull(pathComputationProvider);
  60         this.dataBroker = requireNonNull(dataBroker);
  61         this.rpcRegistry = requireNonNull(rpcConsumerRegistry);
  62     }
  63
  64     @Override
  65     @Deactivate
  66     @PreDestroy
  67     public void close() {
  68         for (PathManagerListener pathListener: pathListeners.values()) {
  69             pathListener.close();
  70             pathListener = null;
  71         }
  72         pathListeners.clear();
  73         for (PcepTopologyListener pcepListener: pcepListeners.values()) {
  74             pcepListener.close();
  75             pcepListener = null;
  76         }
  77         pcepListeners.clear();
  78         for (PathManagerProvider pathManager: pathManagers.values()) {
  79             pathManager.close();
  80             pathManager = null;
  81         }
  82         pathManagers.clear();
  83     }
  84
  85     private void closeListenerAndManager(TopologyId key) {
  86
  87         PathManagerListener pathListener = pathListeners.remove(key);
  88         if (pathListener != null) {
  89             pathListener.close();
  90         }
  91         PcepTopologyListener pcepListener = pcepListeners.remove(key);
  92         if (pcepListener != null) {
  93             pcepListener.close();
  94         }
  95         PathManagerProvider pathManager = pathManagers.remove(key);
  96         if (pathManager != null) {
  97             pathManager.close();
  98         }
  99     }
 100
 101     @Override
 102     public @Nullable PathComputation getPathComputation() {
 103         /* Check that we have a valid graph */
 104         final ConnectedGraph graph = getTedGraph();
 105         return graph == null ? null : new PathComputationImpl(tedGraph, algoProvider);
 106     }
 107
 108     public ConnectedGraph getTedGraph() {
 109         /* Leave a chance to get a valid Graph in case of late fulfillment */
 110         if (tedGraph == null) {
 111             setTedGraph();
 112         }
 113         return tedGraph;
 114     }
 115
 116     /**
 117      * Set Traffic Engineering Graph. This method is necessary as the TedGraph could be available
 118      * after the PathComputationFactory start e.g. manual insertion of a ted Graph, or late tedGraph fulfillment
 119      * from BGP Link State.
 120      */
 121     private void setTedGraph() {
 122         tedGraph = graphProvider.getConnectedGraph(graphKey);
 123     }
 124
 125     @Override
 126     public void registerPcepTopology(KeyedInstanceIdentifier<Topology, TopologyKey> topology, GraphKey key) {
 127         TopologyId topoKey = requireNonNull(topology).getKey().getTopologyId();
 128         this.graphKey = requireNonNull(key);
 129
 130         LOG.info("Start PCE Server components for Topology {} with TED {}", topoKey.getValue(), graphKey.getName());
 131
 132         /* First close current Listener & Manager if there are active */
 133         closeListenerAndManager(topoKey);
 134
 135         /* Then create Path Manger */
 136         PathManagerProvider pathManager = new PathManagerProvider(dataBroker, topology, rpcRegistry, this);
 137
 138         /* And Listener */
 139         PathManagerListener pathListener = new PathManagerListener(dataBroker, topology, pathManager);
 140         PcepTopologyListener pcepListener = new PcepTopologyListener(dataBroker, topology, pathManager);
 141
 142         /* Finally, register all of them for later deletion */
 143         pathManagers.put(topoKey, pathManager);
 144         pathListeners.put(topoKey, pathListener);
 145         pcepListeners.put(topoKey, pcepListener);
 146     }
 147
 148     @Override
 149     public void unRegisterPcepTopology(KeyedInstanceIdentifier<Topology, TopologyKey> topology) {
 150         TopologyId topoKey = requireNonNull(topology).getKey().getTopologyId();
 151         this.graphKey = null;
 152
 153         LOG.info("Stop PCE Server for Topology {}", topoKey.getValue());
 154         closeListenerAndManager(topoKey);
 155     }
 156 }