applications/topology-manager/src/main/java/org/opendaylight/openflowplugin/applications/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.openflowplugin.applications.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     private LinkChangeListenerImpl linkChangeListener;
  35     private NodeChangeListenerImpl nodeChangeListener;
  36
  37     /**
  38      * Gets called on start of a bundle.
  39      *
  40      * @param session
  41      */
  42     @Override
  43     public synchronized void onSessionInitiated(final ProviderContext session) {
  44         final DataBroker dataBroker = session.getSALService(DataBroker.class);
  45         final NotificationProviderService notificationService = session.getSALService(NotificationProviderService.class);
  46
  47         final String name = "flow:1";
  48         final TopologyKey key = new TopologyKey(new TopologyId(name));
  49         final InstanceIdentifier<Topology> path = InstanceIdentifier
  50                 .create(NetworkTopology.class)
  51                 .child(Topology.class, key);
  52
  53         final OperationProcessor processor = new OperationProcessor(dataBroker);
  54         final FlowCapableTopologyExporter listener = new FlowCapableTopologyExporter(processor, path);
  55         this.listenerRegistration = notificationService.registerNotificationListener(listener);
  56         linkChangeListener = new LinkChangeListenerImpl(dataBroker, processor);
  57         nodeChangeListener = new NodeChangeListenerImpl(dataBroker, processor);
  58
  59         final ReadWriteTransaction tx = dataBroker.newReadWriteTransaction();
  60         tx.put(LogicalDatastoreType.OPERATIONAL, path, new TopologyBuilder().setKey(key).build(), true);
  61         try {
  62             tx.submit().get();
  63         } catch (InterruptedException | ExecutionException e) {
  64             LOG.warn("Initial topology export failed, continuing anyway", e);
  65         }
  66
  67         thread = new Thread(processor);
  68         thread.setDaemon(true);
  69         thread.setName("FlowCapableTopologyExporter-" + name);
  70         thread.start();
  71     }
  72
  73     @Override
  74     public synchronized void close() throws InterruptedException {
  75         LOG.info("FlowCapableTopologyProvider stopped.");
  76         if (this.listenerRegistration != null) {
  77             try {
  78                 this.listenerRegistration.close();
  79             } catch (Exception e) {
  80                 LOG.error("Failed to close listener registration", e);
  81             }
  82             listenerRegistration = null;
  83         }
  84         unregisterListener(linkChangeListener);
  85         unregisterListener(nodeChangeListener);
  86         if (thread != null) {
  87             thread.interrupt();
  88             thread.join();
  89             thread = null;
  90         }
  91     }
  92
  93     private void unregisterListener(final AutoCloseable listenerToClose) {
  94         if (listenerToClose != null) {
  95             try {
  96                 listenerToClose.close();
  97             } catch (Exception e) {
  98                 LOG.error("Failed to close listener registration", e);
  99             }
 100         }
 101     }
 102
 103     /**
 104      * Gets called during stop bundle
 105      *
 106      * @param context The execution context of the bundle being stopped.
 107      */
 108     @Override
 109     public void stopImpl(final BundleContext context) {
 110         try {
 111             this.close();
 112         } catch (InterruptedException e) {
 113             LOG.error("Failed to stop provider", e);
 114         }
 115     }
 116 }