renderers/ofoverlay/src/main/java/org/opendaylight/groupbasedpolicy/renderer/ofoverlay/node/FlowCapableNodeListener.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
   9 package org.opendaylight.groupbasedpolicy.renderer.ofoverlay.node;
  10
  11 import static com.google.common.base.Preconditions.checkNotNull;
  12
  13 import java.util.Collection;
  14 import org.opendaylight.controller.md.sal.binding.api.DataBroker;
  15 import org.opendaylight.controller.md.sal.binding.api.DataObjectModification;
  16 import org.opendaylight.controller.md.sal.binding.api.DataTreeChangeListener;
  17 import org.opendaylight.controller.md.sal.binding.api.DataTreeIdentifier;
  18 import org.opendaylight.controller.md.sal.binding.api.DataTreeModification;
  19 import org.opendaylight.controller.md.sal.common.api.data.LogicalDatastoreType;
  20 import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.inventory.rev130819.FlowCapableNode;
  21 import org.opendaylight.yang.gen.v1.urn.opendaylight.inventory.rev130819.NodeId;
  22 import org.opendaylight.yang.gen.v1.urn.opendaylight.inventory.rev130819.Nodes;
  23 import org.opendaylight.yang.gen.v1.urn.opendaylight.inventory.rev130819.nodes.Node;
  24 import org.opendaylight.yang.gen.v1.urn.opendaylight.inventory.rev130819.nodes.NodeKey;
  25 import org.opendaylight.yangtools.concepts.ListenerRegistration;
  26 import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
  27 import org.slf4j.Logger;
  28 import org.slf4j.LoggerFactory;
  29
  30 public class FlowCapableNodeListener implements DataTreeChangeListener<FlowCapableNode>, AutoCloseable {
  31
  32     private static final Logger LOG = LoggerFactory.getLogger(FlowCapableNodeListener.class);
  33
  34     private final static InstanceIdentifier<FlowCapableNode> fcNodeIid = InstanceIdentifier.builder(Nodes.class)
  35         .child(Node.class)
  36         .augmentation(FlowCapableNode.class)
  37         .build();
  38     private final SwitchManager switchManager;
  39     private final ListenerRegistration<?> listenerRegistration;
  40
  41     public FlowCapableNodeListener(DataBroker dataProvider, SwitchManager switchManager) {
  42         this.switchManager = checkNotNull(switchManager);
  43         listenerRegistration = checkNotNull(dataProvider).registerDataTreeChangeListener(new DataTreeIdentifier<>(
  44                 LogicalDatastoreType.OPERATIONAL, fcNodeIid), this);
  45     }
  46
  47     @Override
  48     public void onDataTreeChanged(Collection<DataTreeModification<FlowCapableNode>> changes) {
  49         for (DataTreeModification<FlowCapableNode> change: changes) {
  50             DataObjectModification<FlowCapableNode> rootNode = change.getRootNode();
  51             NodeId nodeId = change.getRootPath().getRootIdentifier().firstKeyOf(Node.class, NodeKey.class).getId();
  52             switch (rootNode.getModificationType()) {
  53                 case SUBTREE_MODIFIED:
  54                 case WRITE:
  55                     FlowCapableNode fcNode = rootNode.getDataAfter();
  56                     LOG.trace("FlowCapableNode updated. NodeId: {} FlowCapableNode: {}", nodeId.getValue(), fcNode);
  57                     switchManager.updateSwitch(nodeId, fcNode);
  58                     break;
  59                 case DELETE:
  60                     LOG.trace("FlowCapableNode removed. NodeId: {}", nodeId.getValue());
  61                     switchManager.updateSwitch(nodeId, null);
  62                     break;
  63                 default:
  64                     break;
  65             }
  66         }
  67     }
  68
  69     @Override
  70     public void close() throws Exception {
  71         if (listenerRegistration != null) {
  72             listenerRegistration.close();
  73         }
  74     }
  75
  76 }