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 com.google.common.base.Preconditions;
  11
  12 import org.opendaylight.bgpcep.topology.DefaultTopologyReference;
  13 import org.opendaylight.bgpcep.topology.TopologyReference;
  14 import org.opendaylight.controller.md.sal.binding.api.DataBroker;
  15 import org.opendaylight.controller.md.sal.binding.api.DataChangeListener;
  16 import org.opendaylight.controller.md.sal.common.api.data.AsyncDataBroker.DataChangeScope;
  17 import org.opendaylight.controller.md.sal.common.api.data.LogicalDatastoreType;
  18 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.NetworkTopology;
  19 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.TopologyId;
  20 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.network.topology.Topology;
  21 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.network.topology.TopologyKey;
  22 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.network.topology.topology.Node;
  23 import org.opendaylight.yangtools.concepts.ListenerRegistration;
  24 import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
  25
  26 public final class PCEPTunnelTopologyProvider implements AutoCloseable {
  27     private final ListenerRegistration<DataChangeListener> reg;
  28     private final TopologyReference ref;
  29
  30     private PCEPTunnelTopologyProvider(final InstanceIdentifier<Topology> dst, final ListenerRegistration<DataChangeListener> reg) {
  31         this.ref = new DefaultTopologyReference(dst);
  32         this.reg = Preconditions.checkNotNull(reg);
  33     }
  34
  35     public static PCEPTunnelTopologyProvider create(final DataBroker dataProvider,
  36             final InstanceIdentifier<Topology> sourceTopology, final TopologyId targetTopology) {
  37         final InstanceIdentifier<Topology> dst = InstanceIdentifier.builder(NetworkTopology.class).child(Topology.class,
  38                 new TopologyKey(targetTopology)).build();
  39         final NodeChangedListener ncl = new NodeChangedListener(dataProvider, dst);
  40
  41         final InstanceIdentifier<Node> src = sourceTopology.child(Node.class);
  42         final ListenerRegistration<DataChangeListener> reg = dataProvider.registerDataChangeListener(LogicalDatastoreType.OPERATIONAL, src, ncl, DataChangeScope.SUBTREE);
  43
  44         return new PCEPTunnelTopologyProvider(dst, reg);
  45     }
  46
  47     @Override
  48     public void close() {
  49         reg.close();
  50     }
  51
  52     public TopologyReference getTopologyReference() {
  53         return ref;
  54     }
  55 }