pcep/tunnel/tunnel-provider/src/main/java/org/opendaylight/bgpcep/pcep/tunnel/provider/TunnelProviderDeployer.java

   1 /*
   2  * Copyright (c) 2017 AT&T Intellectual Property. 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.tunnel.provider;
   9
  10 import static org.opendaylight.controller.md.sal.common.api.data.LogicalDatastoreType.CONFIGURATION;
  11
  12 import java.util.Collection;
  13 import java.util.HashMap;
  14 import java.util.List;
  15 import java.util.Map;
  16 import java.util.concurrent.TimeUnit;
  17 import java.util.stream.Collectors;
  18 import javax.annotation.Nonnull;
  19 import javax.annotation.concurrent.GuardedBy;
  20 import org.opendaylight.bgpcep.pcep.topology.provider.config.PCEPTopologyDeployerImpl;
  21 import org.opendaylight.controller.md.sal.binding.api.ClusteredDataTreeChangeListener;
  22 import org.opendaylight.controller.md.sal.binding.api.DataBroker;
  23 import org.opendaylight.controller.md.sal.binding.api.DataObjectModification;
  24 import org.opendaylight.controller.md.sal.binding.api.DataTreeIdentifier;
  25 import org.opendaylight.controller.md.sal.binding.api.DataTreeModification;
  26 import org.opendaylight.controller.sal.binding.api.RpcProviderRegistry;
  27 import org.opendaylight.mdsal.singleton.common.api.ClusterSingletonServiceProvider;
  28 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.topology.tunnel.pcep.config.rev171127.PcepTunnelTopologyConfig;
  29 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.topology.tunnel.pcep.rev130820.TopologyTypes1;
  30 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.NetworkTopology;
  31 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.TopologyId;
  32 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.network.topology.Topology;
  33 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.network.topology.TopologyKey;
  34 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.network.topology.topology.TopologyTypes;
  35 import org.opendaylight.yangtools.concepts.ListenerRegistration;
  36 import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
  37 import org.osgi.framework.BundleContext;
  38 import org.slf4j.Logger;
  39 import org.slf4j.LoggerFactory;
  40
  41 public final class TunnelProviderDeployer implements ClusteredDataTreeChangeListener<Topology>, AutoCloseable {
  42
  43     private static final Logger LOG = LoggerFactory.getLogger(PCEPTopologyDeployerImpl.class);
  44
  45     private static final long TIMEOUT_NS = TimeUnit.SECONDS.toNanos(5);
  46     private final TunnelProviderDependencies dependencies;
  47     private final InstanceIdentifier<Topology> networTopology;
  48     @GuardedBy("this")
  49     private final Map<TopologyId, PCEPTunnelClusterSingletonService> pcepTunnelServices = new HashMap<>();
  50     @GuardedBy("this")
  51     private ListenerRegistration<TunnelProviderDeployer> listenerRegistration;
  52
  53     public TunnelProviderDeployer(
  54             final DataBroker dataBroker,
  55             final RpcProviderRegistry rpcProviderRegistry,
  56             final BundleContext bundleContext,
  57             final ClusterSingletonServiceProvider cssp
  58     ) {
  59         this.dependencies = new TunnelProviderDependencies(dataBroker, cssp, rpcProviderRegistry, bundleContext);
  60         this.networTopology = InstanceIdentifier.builder(NetworkTopology.class).child(Topology.class).build();
  61     }
  62
  63     @SuppressWarnings("checkstyle:IllegalCatch")
  64     private static void closeTopology(final PCEPTunnelClusterSingletonService topology, final TopologyId topologyId) {
  65         if (topology != null) {
  66             try {
  67                 topology.closeServiceInstance().get(TIMEOUT_NS, TimeUnit.NANOSECONDS);
  68             } catch (final Exception e) {
  69                 LOG.error("Topology {} instance failed to close service instance", topologyId, e);
  70             }
  71             topology.close();
  72         }
  73     }
  74
  75     public synchronized void init() {
  76         this.listenerRegistration = this.dependencies.getDataBroker().registerDataTreeChangeListener(
  77                 new DataTreeIdentifier<>(CONFIGURATION, this.networTopology), this);
  78     }
  79
  80     @Override
  81     public synchronized void onDataTreeChanged(@Nonnull final Collection<DataTreeModification<Topology>> changes) {
  82         final List<DataObjectModification<Topology>> topoChanges = changes.stream()
  83                 .map(DataTreeModification::getRootNode)
  84                 .collect(Collectors.toList());
  85
  86         topoChanges.stream().iterator().forEachRemaining(this::handleTopologyChange);
  87     }
  88
  89     private synchronized void handleTopologyChange(final DataObjectModification<Topology> topo) {
  90         switch (topo.getModificationType()) {
  91             case SUBTREE_MODIFIED:
  92                 updateTunnelTopologyProvider(topo.getDataAfter());
  93                 break;
  94             case WRITE:
  95                 createTunnelTopologyProvider(topo.getDataAfter());
  96                 break;
  97             case DELETE:
  98                 removeTunnelTopologyProvider(topo.getDataBefore());
  99                 break;
 100             default:
 101         }
 102     }
 103
 104     private boolean filterPcepTopologies(final TopologyTypes topologyTypes) {
 105         if (topologyTypes == null) {
 106             return false;
 107         }
 108         final TopologyTypes1 aug = topologyTypes.getAugmentation(TopologyTypes1.class);
 109         return aug != null && aug.getTopologyTunnelPcep() != null;
 110     }
 111
 112     private synchronized void createTunnelTopologyProvider(final Topology topology) {
 113         if (!filterPcepTopologies(topology.getTopologyTypes())) {
 114             return;
 115         }
 116         final TopologyId topologyId = topology.getTopologyId();
 117         if (this.pcepTunnelServices.containsKey(topology.getTopologyId())) {
 118             LOG.warn("Tunnel Topology {} already exist. New instance won't be created", topologyId);
 119             return;
 120         }
 121
 122         final PcepTunnelTopologyConfig config = topology.getAugmentation(PcepTunnelTopologyConfig.class);
 123         final String pcepTopoID = config.getPcepTopologyReference().getValue();
 124
 125         final InstanceIdentifier<Topology> pcepTopoRef = InstanceIdentifier.builder(NetworkTopology.class)
 126                 .child(Topology.class, new TopologyKey(new TopologyId(pcepTopoID))).build();
 127
 128
 129         final PCEPTunnelClusterSingletonService tunnelTopoCss =
 130                 new PCEPTunnelClusterSingletonService(this.dependencies, pcepTopoRef, topologyId);
 131         this.pcepTunnelServices.put(topology.getTopologyId(), tunnelTopoCss);
 132     }
 133
 134     private synchronized void updateTunnelTopologyProvider(final Topology topology) {
 135         if (!filterPcepTopologies(topology.getTopologyTypes())) {
 136             return;
 137         }
 138         final TopologyId topologyId = topology.getTopologyId();
 139         final PCEPTunnelClusterSingletonService previous = this.pcepTunnelServices.remove(topology.getTopologyId());
 140         closeTopology(previous, topologyId);
 141         createTunnelTopologyProvider(topology);
 142     }
 143
 144     private synchronized void removeTunnelTopologyProvider(final Topology topo) {
 145         if (!filterPcepTopologies(topo.getTopologyTypes())) {
 146             return;
 147         }
 148         final TopologyId topologyId = topo.getTopologyId();
 149         final PCEPTunnelClusterSingletonService topology = this.pcepTunnelServices.remove(topologyId);
 150         closeTopology(topology, topologyId);
 151     }
 152
 153     @Override
 154     public synchronized void close() {
 155         if (this.listenerRegistration != null) {
 156             this.listenerRegistration.close();
 157             this.listenerRegistration = null;
 158         }
 159         this.pcepTunnelServices.values().iterator().forEachRemaining(PCEPTunnelClusterSingletonService::close);
 160         this.pcepTunnelServices.clear();
 161     }
 162 }