opendaylight/md-sal/topology-manager/src/main/java/org/opendaylight/md/controller/topology/manager/FlowCapableTopologyProvider.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.md.controller.topology.manager;
   9
  10 import java.util.concurrent.ExecutionException;
  11
  12 import org.opendaylight.controller.md.sal.binding.api.DataBroker;
  13 import org.opendaylight.controller.md.sal.binding.api.ReadWriteTransaction;
  14 import org.opendaylight.controller.md.sal.common.api.data.LogicalDatastoreType;
  15 import org.opendaylight.controller.sal.binding.api.AbstractBindingAwareProvider;
  16 import org.opendaylight.controller.sal.binding.api.BindingAwareBroker.ProviderContext;
  17 import org.opendaylight.controller.sal.binding.api.NotificationProviderService;
  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.TopologyBuilder;
  22 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.network.topology.TopologyKey;
  23 import org.opendaylight.yangtools.concepts.ListenerRegistration;
  24 import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
  25 import org.opendaylight.yangtools.yang.binding.NotificationListener;
  26 import org.osgi.framework.BundleContext;
  27 import org.slf4j.Logger;
  28 import org.slf4j.LoggerFactory;
  29
  30 public class FlowCapableTopologyProvider extends AbstractBindingAwareProvider implements AutoCloseable {
  31     private final static Logger LOG = LoggerFactory.getLogger(FlowCapableTopologyProvider.class);
  32     private ListenerRegistration<NotificationListener> listenerRegistration;
  33     private Thread thread;
  34
  35     /**
  36      * Gets called on start of a bundle.
  37      *
  38      * @param session
  39      */
  40     @Override
  41     public synchronized void onSessionInitiated(final ProviderContext session) {
  42         final DataBroker dataBroker = session.getSALService(DataBroker.class);
  43         final NotificationProviderService notificationService = session.getSALService(NotificationProviderService.class);
  44
  45         final String name = "flow:1";
  46         final TopologyKey key = new TopologyKey(new TopologyId(name));
  47         final InstanceIdentifier<Topology> path = InstanceIdentifier
  48                 .create(NetworkTopology.class)
  49                 .child(Topology.class, key);
  50
  51         final OperationProcessor processor = new OperationProcessor(dataBroker);
  52         final FlowCapableTopologyExporter listener = new FlowCapableTopologyExporter(processor, path);
  53         this.listenerRegistration = notificationService.registerNotificationListener(listener);
  54
  55         final ReadWriteTransaction tx = dataBroker.newReadWriteTransaction();
  56         tx.put(LogicalDatastoreType.OPERATIONAL, path, new TopologyBuilder().setKey(key).build(), true);
  57         try {
  58             tx.submit().get();
  59         } catch (InterruptedException | ExecutionException e) {
  60             LOG.warn("Initial topology export failed, continuing anyway", e);
  61         }
  62
  63         thread = new Thread(processor);
  64         thread.setDaemon(true);
  65         thread.setName("FlowCapableTopologyExporter-" + name);
  66         thread.start();
  67     }
  68
  69     @Override
  70     public synchronized void close() throws InterruptedException {
  71         LOG.info("FlowCapableTopologyProvider stopped.");
  72         if (this.listenerRegistration != null) {
  73             try {
  74                 this.listenerRegistration.close();
  75             } catch (Exception e) {
  76                 LOG.error("Failed to close listener registration", e);
  77             }
  78             listenerRegistration = null;
  79         }
  80         if (thread != null) {
  81             thread.interrupt();
  82             thread.join();
  83             thread = null;
  84         }
  85     }
  86
  87     /**
  88      * Gets called during stop bundle
  89      *
  90      * @param context The execution context of the bundle being stopped.
  91      */
  92     @Override
  93     public void stopImpl(final BundleContext context) {
  94         try {
  95             this.close();
  96         } catch (InterruptedException e) {
  97             LOG.error("Failed to stop provider", e);
  98         }
  99     }
 100 }