opendaylight/md-sal/forwardingrules-manager/src/main/java/org/opendaylight/controller/frm/flow/FlowProvider.java

   1 /**
   2  * Copyright (c) 2014 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.controller.frm.flow;
   9
  10 import org.opendaylight.controller.sal.binding.api.data.DataChangeListener;
  11 import org.opendaylight.controller.sal.binding.api.data.DataModificationTransaction;
  12 import org.opendaylight.controller.sal.binding.api.data.DataProviderService;
  13 import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.inventory.rev130819.FlowCapableNode;
  14 import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.inventory.rev130819.tables.Table;
  15 import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.inventory.rev130819.tables.table.Flow;
  16 import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.service.rev130819.SalFlowService;
  17 import org.opendaylight.yang.gen.v1.urn.opendaylight.inventory.rev130819.Nodes;
  18 import org.opendaylight.yang.gen.v1.urn.opendaylight.inventory.rev130819.nodes.Node;
  19 import org.opendaylight.yangtools.concepts.ListenerRegistration;
  20 import org.opendaylight.yangtools.yang.binding.DataObject;
  21 import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
  22 import org.opendaylight.yangtools.yang.binding.InstanceIdentifier.InstanceIdentifierBuilder;
  23 import org.slf4j.Logger;
  24 import org.slf4j.LoggerFactory;
  25
  26 public class FlowProvider implements AutoCloseable {
  27
  28     private final static Logger LOG = LoggerFactory.getLogger(FlowProvider.class);
  29
  30     private SalFlowService salFlowService;
  31     private DataProviderService dataService;
  32
  33     /* DataChangeListener */
  34     private FlowChangeListener flowDataChangeListener;
  35     ListenerRegistration<DataChangeListener> flowDataChangeListenerRegistration;
  36
  37     public void start() {
  38         /* Build Path */
  39         InstanceIdentifierBuilder<Nodes> nodesBuilder = InstanceIdentifier.<Nodes> builder(Nodes.class);
  40         InstanceIdentifierBuilder<Node> nodeChild = nodesBuilder.<Node> child(Node.class);
  41         InstanceIdentifierBuilder<FlowCapableNode> augmentFlowCapNode = nodeChild.<FlowCapableNode> augmentation(FlowCapableNode.class);
  42         InstanceIdentifierBuilder<Table> tableChild = augmentFlowCapNode.<Table> child(Table.class);
  43         InstanceIdentifierBuilder<Flow> flowChild = tableChild.<Flow> child(Flow.class);
  44         final InstanceIdentifier<? extends DataObject> flowDataObjectPath = flowChild.toInstance();
  45
  46         /* DataChangeListener registration */
  47         this.flowDataChangeListener = new FlowChangeListener(this.salFlowService);
  48         this.flowDataChangeListenerRegistration = this.dataService.registerDataChangeListener(flowDataObjectPath, flowDataChangeListener);
  49         LOG.info("Flow Config Provider started.");
  50     }
  51
  52     protected DataModificationTransaction startChange() {
  53         return this.dataService.beginTransaction();
  54     }
  55
  56     @Override
  57     public void close() throws Exception {
  58         if(flowDataChangeListenerRegistration != null){
  59             flowDataChangeListenerRegistration.close();
  60         }
  61     }
  62
  63     public void setDataService(final DataProviderService dataService) {
  64         this.dataService = dataService;
  65     }
  66
  67     public void setSalFlowService(final SalFlowService salFlowService) {
  68         this.salFlowService = salFlowService;
  69     }
  70 }