fcapsapplication/fcapsapplication-impl/src/main/java/org/opendaylight/vpnservice/fcapsapp/NodeEventListener.java

   1 /*
   2  * Copyright (c) 2016 Ericsson India Global Services Pvt Ltd. 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.vpnservice.fcapsapp;
   9
  10 import com.google.common.base.Optional;
  11 import org.opendaylight.controller.md.sal.binding.api.*;
  12
  13 import org.opendaylight.controller.md.sal.common.api.clustering.Entity;
  14 import org.opendaylight.controller.md.sal.common.api.clustering.EntityOwnershipService;
  15 import org.opendaylight.controller.md.sal.common.api.clustering.EntityOwnershipState;
  16 import org.opendaylight.vpnservice.fcapsapp.alarm.AlarmAgent;
  17 import org.opendaylight.vpnservice.fcapsapp.performancecounter.NodeUpdateCounter;
  18 import org.opendaylight.vpnservice.fcapsapp.performancecounter.PacketInCounterHandler;
  19 import org.opendaylight.yang.gen.v1.urn.opendaylight.flow.inventory.rev130819.FlowCapableNode;
  20 import org.opendaylight.yang.gen.v1.urn.opendaylight.inventory.rev130819.nodes.Node;
  21 import org.opendaylight.yangtools.yang.binding.DataObject;
  22 import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
  23 import org.slf4j.Logger;
  24 import org.slf4j.LoggerFactory;
  25 import java.net.InetAddress;
  26 import java.util.Collection;
  27
  28 public class NodeEventListener<D extends DataObject> implements ClusteredDataTreeChangeListener<D>,AutoCloseable {
  29     private static final Logger LOG = LoggerFactory.getLogger(NodeEventListener.class);
  30     public static final AlarmAgent alarmAgent = new AlarmAgent();
  31     public static final NodeUpdateCounter nodeUpdateCounter = new NodeUpdateCounter();
  32     public static final PacketInCounterHandler packetInCounter = new PacketInCounterHandler();
  33     private final EntityOwnershipService entityOwnershipService;
  34
  35     /**
  36      * Construcor set EntityOwnershipService
  37      * @param eos
  38      */
  39     public NodeEventListener(final EntityOwnershipService eos) {
  40         this.entityOwnershipService = eos;
  41     }
  42
  43     @Override
  44     public void onDataTreeChanged(Collection<DataTreeModification<D>> changes) {
  45         for (DataTreeModification<D> change : changes) {
  46             final InstanceIdentifier<D> key = change.getRootPath().getRootIdentifier();
  47             final DataObjectModification<D> mod = change.getRootNode();
  48             final InstanceIdentifier<FlowCapableNode> nodeConnIdent =
  49                     key.firstIdentifierOf(FlowCapableNode.class);
  50             String nodeId = null, hostName = null;
  51             try {
  52                 nodeId = getDpnId(String.valueOf(nodeConnIdent.firstKeyOf(Node.class).getId()));
  53             } catch (Exception ex) {
  54                 LOG.error("Dpn retrieval failed");
  55                 return;
  56             }
  57
  58             hostName = System.getenv().get("HOSTNAME");
  59             if (hostName == null) {
  60                 try {
  61                     hostName = InetAddress.getLocalHost().getHostName();
  62                 } catch (Exception e) {
  63                     LOG.error("Retrieving hostName failed {}", e);
  64                 }
  65             }
  66             LOG.debug("retrieved hostname {}", hostName);
  67             if (nodeId != null) {
  68                 switch (mod.getModificationType()) {
  69                     case DELETE:
  70                         LOG.debug("NodeRemoved {} notification is received on host {}", nodeId, hostName);
  71                         if (nodeUpdateCounter.isDpnConnectedLocal(nodeId)) {
  72                             alarmAgent.raiseControlPathAlarm(nodeId, hostName);
  73                             nodeUpdateCounter.nodeRemovedNotification(nodeId, hostName);
  74                         }
  75                         packetInCounter.nodeRemovedNotification(nodeId);
  76                         break;
  77                     case SUBTREE_MODIFIED:
  78                         if (isNodeOwner(nodeId)) {
  79                             LOG.debug("NodeUpdated {} notification is received", nodeId);
  80                         } else {
  81                             LOG.debug("UPDATE: Node {} is not connected to host {}", nodeId, hostName);
  82                         }
  83                         break;
  84                     case WRITE:
  85                         if (mod.getDataBefore() == null) {
  86                             if (isNodeOwner(nodeId)) {
  87                                 LOG.debug("NodeAdded {} notification is received on host {}", nodeId, hostName);
  88                                 alarmAgent.clearControlPathAlarm(nodeId);
  89                                 nodeUpdateCounter.nodeAddedNotification(nodeId, hostName);
  90                             } else {
  91                                 LOG.debug("ADD: Node {} is not connected to host {}", nodeId, hostName);
  92                             }
  93                         }
  94                         break;
  95                     default:
  96                         LOG.debug("Unhandled Modification type {}", mod.getModificationType());
  97                         throw new IllegalArgumentException("Unhandled modification type " + mod.getModificationType());
  98
  99                 }
 100             } else {
 101                 LOG.error("DpnID is null");
 102             }
 103         }
 104     }
 105
 106     private String getDpnId(String node) {
 107         //Uri [_value=openflow:1]
 108         String temp[] = node.split("=");
 109         String dpnId = temp[1].substring(0,temp[1].length() - 1);
 110         return dpnId;
 111
 112     }
 113
 114     /**
 115      * Method checks if *this* instance of controller is owner of
 116      * the given openflow node.
 117      * @param nodeId DpnId
 118      * @return True if owner, else false
 119      */
 120     public boolean isNodeOwner(String nodeId) {
 121         Entity entity = new Entity("openflow", nodeId);
 122         Optional<EntityOwnershipState> entityState = this.entityOwnershipService.getOwnershipState(entity);
 123         if (entityState.isPresent()) {
 124             return entityState.get().isOwner();
 125         }
 126         return false;
 127     }
 128
 129     @Override
 130     public void close() throws Exception {
 131     }
 132 }