hwvtepsouthbound/hwvtepsouthbound-impl/src/main/java/org/opendaylight/ovsdb/hwvtepsouthbound/HwvtepOperGlobalListener.java

   1 /*
   2  * Copyright (c) 2017 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.ovsdb.hwvtepsouthbound;
   9
  10 import java.util.Collection;
  11 import java.util.Collections;
  12 import java.util.Map;
  13 import java.util.Objects;
  14 import java.util.Timer;
  15 import java.util.concurrent.ConcurrentHashMap;
  16 import java.util.concurrent.ExecutionException;
  17 import org.opendaylight.controller.md.sal.binding.api.ClusteredDataTreeChangeListener;
  18 import org.opendaylight.controller.md.sal.binding.api.DataBroker;
  19 import org.opendaylight.controller.md.sal.binding.api.DataObjectModification;
  20 import org.opendaylight.controller.md.sal.binding.api.DataObjectModification.ModificationType;
  21 import org.opendaylight.controller.md.sal.binding.api.DataTreeIdentifier;
  22 import org.opendaylight.controller.md.sal.binding.api.DataTreeModification;
  23 import org.opendaylight.controller.md.sal.common.api.data.LogicalDatastoreType;
  24 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.NetworkTopology;
  25 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.network.topology.Topology;
  26 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.network.topology.TopologyKey;
  27 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.network.topology.topology.Node;
  28 import org.opendaylight.yangtools.concepts.ListenerRegistration;
  29 import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
  30 import org.slf4j.Logger;
  31 import org.slf4j.LoggerFactory;
  32
  33 public class HwvtepOperGlobalListener implements ClusteredDataTreeChangeListener<Node>, AutoCloseable {
  34     private static final Logger LOG = LoggerFactory.getLogger(HwvtepOperGlobalListener.class);
  35
  36     private final Timer timer = new Timer();
  37     private ListenerRegistration<HwvtepOperGlobalListener> registration;
  38     private final HwvtepConnectionManager hcm;
  39     private final DataBroker db;
  40     private static final Map<InstanceIdentifier<Node>, Node> CONNECTED_NODES = new ConcurrentHashMap<>();
  41
  42     HwvtepOperGlobalListener(final DataBroker db, final HwvtepConnectionManager hcm) {
  43         LOG.info("Registering HwvtepOperGlobalListener");
  44         this.db = db;
  45         this.hcm = hcm;
  46         registerListener();
  47     }
  48
  49     private void registerListener() {
  50         final DataTreeIdentifier<Node> treeId =
  51                         new DataTreeIdentifier<>(LogicalDatastoreType.OPERATIONAL, getWildcardPath());
  52
  53         registration = db.registerDataTreeChangeListener(treeId, HwvtepOperGlobalListener.this);
  54     }
  55
  56     @Override
  57     public void close() {
  58         if (registration != null) {
  59             registration.close();
  60         }
  61     }
  62
  63     @Override
  64     public void onDataTreeChanged(final Collection<DataTreeModification<Node>> changes) {
  65         changes.forEach(change -> {
  66             InstanceIdentifier<Node> key = change.getRootPath().getRootIdentifier();
  67             DataObjectModification<Node> mod = change.getRootNode();
  68             InstanceIdentifier<Node> nodeIid = change.getRootPath().getRootIdentifier();
  69             Node node = getCreated(mod);
  70             if (node != null) {
  71                 CONNECTED_NODES.put(key, node);
  72             }
  73             node = getRemoved(mod);
  74             if (node != null) {
  75                 CONNECTED_NODES.remove(key);
  76                 HwvtepConnectionInstance connectionInstance = hcm.getConnectionInstanceFromNodeIid(nodeIid);
  77                 if (connectionInstance != null && Objects.equals(connectionInstance.getConnectionInfo().getRemotePort(),
  78                             HwvtepSouthboundUtil.getRemotePort(node))) {
  79                     //Oops some one deleted the node held by me This should never happen
  80                     try {
  81                         connectionInstance.refreshOperNode();
  82                     } catch (ExecutionException | InterruptedException e) {
  83                         LOG.error("Failed to refresh operational nodes ", e);
  84                     }
  85                 }
  86
  87             }
  88         });
  89     }
  90
  91     private static Node getCreated(final DataObjectModification<Node> mod) {
  92         if (mod.getModificationType() == ModificationType.WRITE && mod.getDataBefore() == null) {
  93             return mod.getDataAfter();
  94         }
  95         return null;
  96     }
  97
  98     private static Node getRemoved(final DataObjectModification<Node> mod) {
  99         if (mod.getModificationType() == ModificationType.DELETE) {
 100             return mod.getDataBefore();
 101         }
 102         return null;
 103     }
 104
 105     public Map<InstanceIdentifier<Node>, Node> getConnectedNodes() {
 106         return Collections.unmodifiableMap(CONNECTED_NODES);
 107     }
 108
 109     private static InstanceIdentifier<Node> getWildcardPath() {
 110         return InstanceIdentifier.create(NetworkTopology.class)
 111                 .child(Topology.class, new TopologyKey(HwvtepSouthboundConstants.HWVTEP_TOPOLOGY_ID))
 112                 .child(Node.class);
 113     }
 114
 115     public static Node getNode(final InstanceIdentifier<Node> key) {
 116         return CONNECTED_NODES.get(key);
 117     }
 118 }