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 com.google.common.base.Optional;
  13 import org.opendaylight.controller.md.sal.binding.api.DataBroker;
  14 import org.opendaylight.controller.md.sal.binding.api.ReadTransaction;
  15 import org.opendaylight.controller.md.sal.binding.api.ReadWriteTransaction;
  16 import org.opendaylight.controller.md.sal.common.api.data.LogicalDatastoreType;
  17 import org.opendaylight.controller.md.sal.common.api.data.ReadFailedException;
  18 import org.opendaylight.controller.sal.binding.api.BindingAwareBroker.ProviderContext;
  19 import org.opendaylight.controller.sal.binding.api.BindingAwareProvider;
  20 import org.opendaylight.controller.sal.binding.api.NotificationProviderService;
  21 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.NetworkTopology;
  22 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.TopologyId;
  23 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.network.topology.Topology;
  24 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.network.topology.TopologyBuilder;
  25 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.network.topology.TopologyKey;
  26 import org.opendaylight.yangtools.concepts.ListenerRegistration;
  27 import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
  28 import org.opendaylight.yangtools.yang.binding.NotificationListener;
  29 import org.slf4j.Logger;
  30 import org.slf4j.LoggerFactory;
  31
  32 public class FlowCapableTopologyProvider implements BindingAwareProvider, AutoCloseable {
  33     private static final Logger LOG = LoggerFactory.getLogger(FlowCapableTopologyProvider.class);
  34     private ListenerRegistration<NotificationListener> listenerRegistration;
  35     private Thread thread;
  36     private TerminationPointChangeListenerImpl terminationPointChangeListener;
  37     private NodeChangeListenerImpl nodeChangeListener;
  38     static final String TOPOLOGY_ID = "flow:1";
  39
  40     /**
  41      * Gets called on start of a bundle.
  42      *
  43      * @param session
  44      */
  45     @Override
  46     public synchronized void onSessionInitiated(final ProviderContext session) {
  47         final DataBroker dataBroker = session.getSALService(DataBroker.class);
  48         final NotificationProviderService notificationService = session.getSALService(NotificationProviderService.class);
  49
  50         final TopologyKey key = new TopologyKey(new TopologyId(TOPOLOGY_ID));
  51         final InstanceIdentifier<Topology> path = InstanceIdentifier
  52                 .create(NetworkTopology.class)
  53                 .child(Topology.class, key);
  54
  55         final OperationProcessor processor = new OperationProcessor(dataBroker);
  56         final FlowCapableTopologyExporter listener = new FlowCapableTopologyExporter(processor, path);
  57         this.listenerRegistration = notificationService.registerNotificationListener(listener);
  58         this.terminationPointChangeListener = new TerminationPointChangeListenerImpl(dataBroker, processor);
  59         nodeChangeListener = new NodeChangeListenerImpl(dataBroker, processor);
  60
  61         if(!isFlowTopologyExist(dataBroker, path)){
  62             final ReadWriteTransaction tx = dataBroker.newReadWriteTransaction();
  63             tx.put(LogicalDatastoreType.OPERATIONAL, path, new TopologyBuilder().setKey(key).build(), true);
  64             try {
  65                 tx.submit().get();
  66             } catch (InterruptedException | ExecutionException e) {
  67                 LOG.warn("Initial topology export failed, continuing anyway", e);
  68             }
  69         }
  70
  71         thread = new Thread(processor);
  72         thread.setDaemon(true);
  73         thread.setName("FlowCapableTopologyExporter-" + TOPOLOGY_ID);
  74         thread.start();
  75     }
  76
  77     @Override
  78     public synchronized void close() throws InterruptedException {
  79         LOG.info("FlowCapableTopologyProvider stopped.");
  80         if (this.listenerRegistration != null) {
  81             try {
  82                 this.listenerRegistration.close();
  83             } catch (Exception e) {
  84                 LOG.warn("Failed to close listener registration: {}", e.getMessage());
  85                 LOG.debug("Failed to close listener registration.. ", e);
  86             }
  87             listenerRegistration = null;
  88         }
  89         unregisterListener(terminationPointChangeListener);
  90         unregisterListener(nodeChangeListener);
  91         if (thread != null) {
  92             thread.interrupt();
  93             thread.join();
  94             thread = null;
  95         }
  96     }
  97
  98     private static void unregisterListener(final AutoCloseable listenerToClose) {
  99         if (listenerToClose != null) {
 100             try {
 101                 listenerToClose.close();
 102             } catch (Exception e) {
 103                 LOG.warn("Failed to close listener registration: {}", e.getMessage());
 104                 LOG.debug("Failed to close listener registration.. ", e);
 105             }
 106         }
 107     }
 108
 109     private boolean isFlowTopologyExist(final DataBroker dataBroker,
 110                                         final InstanceIdentifier<Topology> path) {
 111         final ReadTransaction tx = dataBroker.newReadOnlyTransaction();
 112         try {
 113             Optional<Topology> ofTopology = tx.read(LogicalDatastoreType.OPERATIONAL, path).checkedGet();
 114             LOG.debug("OpenFlow topology exist in the operational data store at {}",path);
 115             if(ofTopology.isPresent()){
 116                 return true;
 117             }
 118         } catch (ReadFailedException e) {
 119             LOG.warn("OpenFlow topology read operation failed!", e);
 120         }
 121         return false;
 122     }
 123 }