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 java.util.concurrent.ExecutionException;
  12 import org.opendaylight.controller.md.sal.binding.api.DataBroker;
  13 import org.opendaylight.controller.md.sal.common.api.data.LogicalDatastoreType;
  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     private final DataBroker dataBroker;
  33     private final NotificationProviderService notificationService;
  34     private final OperationProcessor processor;
  35     private TransactionChainManager transactionChainManager;
  36     private ListenerRegistration<NotificationListener> listenerRegistration;
  37
  38     public FlowCapableTopologyProvider(DataBroker dataBroker, NotificationProviderService notificationService,
  39                                        OperationProcessor processor) {
  40         this.dataBroker = dataBroker;
  41         this.notificationService = notificationService;
  42         this.processor = processor;
  43     }
  44
  45     /**
  46      * Gets called on start of a bundle.
  47      */
  48     public void start() {
  49         final TopologyKey key = new TopologyKey(new TopologyId(TOPOLOGY_ID));
  50         final InstanceIdentifier<Topology> path = InstanceIdentifier.create(NetworkTopology.class)
  51                 .child(Topology.class, key);
  52
  53         final FlowCapableTopologyExporter listener = new FlowCapableTopologyExporter(processor, path);
  54         this.listenerRegistration = notificationService.registerNotificationListener(listener);
  55         this.transactionChainManager = new TransactionChainManager(dataBroker, TOPOLOGY_PROVIDER);
  56         this.transactionChainManager.activateTransactionManager();
  57         this.transactionChainManager.initialSubmitWriteTransaction();
  58
  59         if (!isFlowTopologyExist(path)) {
  60             transactionChainManager.writeToTransaction(LogicalDatastoreType.OPERATIONAL, path,
  61                                                        new TopologyBuilder().setKey(key).build(), true);
  62             transactionChainManager.submitTransaction();
  63         }
  64
  65         LOG.info("FlowCapableTopologyProvider started");
  66     }
  67
  68     @Override
  69     public void close() {
  70         LOG.debug("FlowCapableTopologyProvider stopped.");
  71         this.transactionChainManager.close();
  72         if (this.listenerRegistration != null) {
  73             this.listenerRegistration.close();
  74             listenerRegistration = null;
  75         }
  76     }
  77
  78     private boolean isFlowTopologyExist(final InstanceIdentifier<Topology> path) {
  79         try {
  80             Optional<Topology> ofTopology = this.transactionChainManager
  81                     .readFromTransaction(LogicalDatastoreType.OPERATIONAL, path).get();
  82             LOG.debug("OpenFlow topology exist in the operational data store at {}", path);
  83             if (ofTopology.isPresent()) {
  84                 return true;
  85             }
  86         } catch (InterruptedException | ExecutionException e) {
  87             LOG.warn("OpenFlow topology read operation failed!", e);
  88         }
  89         return false;
  90     }
  91 }