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

   1 /*
   2  * Copyright (c) 2013 Cisco Systems, Inc. and others.  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 org.opendaylight.bgpcep.topology.DefaultTopologyReference;
  11 import org.opendaylight.bgpcep.topology.TopologyReference;
  12 import org.opendaylight.controller.sal.binding.api.data.DataChangeListener;
  13 import org.opendaylight.controller.sal.binding.api.data.DataProviderService;
  14 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.NetworkTopology;
  15 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.TopologyId;
  16 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.network.topology.Topology;
  17 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.network.topology.TopologyKey;
  18 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.network.topology.topology.Node;
  19 import org.opendaylight.yangtools.concepts.ListenerRegistration;
  20 import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
  21
  22 import com.google.common.base.Preconditions;
  23
  24 public final class PCEPTunnelTopologyProvider implements AutoCloseable {
  25         private final ListenerRegistration<DataChangeListener> reg;
  26         private final TopologyReference ref;
  27
  28         private PCEPTunnelTopologyProvider(final InstanceIdentifier<Topology> dst, final ListenerRegistration<DataChangeListener> reg) {
  29                 this.ref = new DefaultTopologyReference(dst);
  30                 this.reg = Preconditions.checkNotNull(reg);
  31         }
  32
  33         public static PCEPTunnelTopologyProvider create(final DataProviderService dataProvider,
  34                         final InstanceIdentifier<Topology> sourceTopology, final TopologyId targetTopology) {
  35                 final InstanceIdentifier<Topology> dst =
  36                                 InstanceIdentifier.builder(NetworkTopology.class).
  37                                 child(Topology.class, new TopologyKey(targetTopology)).toInstance();
  38                 final NodeChangedListener ncl = new NodeChangedListener(dataProvider, dst);
  39
  40                 final InstanceIdentifier<Node> src = InstanceIdentifier.builder(sourceTopology).child(Node.class).toInstance();
  41                 final ListenerRegistration<DataChangeListener> reg = dataProvider.registerDataChangeListener(src, ncl);
  42
  43                 return new PCEPTunnelTopologyProvider(dst, reg);
  44         }
  45
  46         @Override
  47         public void close() {
  48                 reg.close();
  49         }
  50
  51         public TopologyReference getTopologyReference() {
  52                 return ref;
  53         }
  54 }