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 com.google.common.base.Optional;
  11 import org.opendaylight.controller.md.sal.binding.api.DataBroker;
  12 import org.opendaylight.controller.md.sal.common.api.data.LogicalDatastoreType;
  13 import org.opendaylight.controller.md.sal.common.api.data.ReadFailedException;
  14 import org.opendaylight.controller.sal.binding.api.NotificationProviderService;
  15 import org.opendaylight.openflowplugin.common.txchain.TransactionChainManager;
  16 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.NetworkTopology;
  17 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.TopologyId;
  18 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.network.topology.Topology;
  19 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.network.topology.TopologyBuilder;
  20 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.network.topology.TopologyKey;
  21 import org.opendaylight.yangtools.concepts.ListenerRegistration;
  22 import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
  23 import org.opendaylight.yangtools.yang.binding.NotificationListener;
  24 import org.slf4j.Logger;
  25 import org.slf4j.LoggerFactory;
  26
  27 public class FlowCapableTopologyProvider implements AutoCloseable {
  28     private static final Logger LOG = LoggerFactory.getLogger(FlowCapableTopologyProvider.class);
  29     private static final String TOPOLOGY_PROVIDER = "topology-provider";
  30     static final String TOPOLOGY_ID = "flow:1";
  31
  32
  33     private final DataBroker dataBroker;
  34     private final NotificationProviderService notificationService;
  35     private final OperationProcessor processor;
  36     private TransactionChainManager transactionChainManager;
  37     private ListenerRegistration<NotificationListener> listenerRegistration;
  38
  39     public FlowCapableTopologyProvider(DataBroker dataBroker, NotificationProviderService notificationService,
  40             OperationProcessor processor) {
  41         this.dataBroker = dataBroker;
  42         this.notificationService = notificationService;
  43         this.processor = processor;
  44     }
  45
  46     /**
  47      * Gets called on start of a bundle.
  48      */
  49     public void start() {
  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 FlowCapableTopologyExporter listener = new FlowCapableTopologyExporter(processor, path);
  56         this.listenerRegistration = notificationService.registerNotificationListener(listener);
  57         this.transactionChainManager = new TransactionChainManager(dataBroker, TOPOLOGY_PROVIDER);
  58         this.transactionChainManager.activateTransactionManager();
  59         this.transactionChainManager.initialSubmitWriteTransaction();
  60
  61         if(!isFlowTopologyExist(path)){
  62             transactionChainManager.writeToTransaction(
  63                     LogicalDatastoreType.OPERATIONAL,
  64                     path,
  65                     new TopologyBuilder().setKey(key).build(),
  66                     true);
  67             transactionChainManager.submitTransaction();
  68         }
  69
  70         LOG.info("FlowCapableTopologyProvider started");
  71     }
  72
  73     @Override
  74     public void close() {
  75         LOG.info("FlowCapableTopologyProvider stopped.");
  76         this.transactionChainManager.close();
  77         if (this.listenerRegistration != null) {
  78             try {
  79                 this.listenerRegistration.close();
  80             } catch (Exception e) {
  81                 LOG.warn("Failed to close listener registration: {}", e.getMessage());
  82                 LOG.debug("Failed to close listener registration.. ", e);
  83             }
  84             listenerRegistration = null;
  85         }
  86     }
  87
  88     private boolean isFlowTopologyExist(final InstanceIdentifier<Topology> path) {
  89         try {
  90             Optional<Topology> ofTopology = this.transactionChainManager
  91                     .readFromTransaction(LogicalDatastoreType.OPERATIONAL, path)
  92                     .checkedGet();
  93             LOG.debug("OpenFlow topology exist in the operational data store at {}",path);
  94             if(ofTopology.isPresent()){
  95                 return true;
  96             }
  97         } catch (ReadFailedException e) {
  98             LOG.warn("OpenFlow topology read operation failed!", e);
  99         }
 100         return false;
 101     }
 102 }