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
   9 package org.opendaylight.ovsdb.hwvtepsouthbound;
  10
  11 import java.util.ArrayList;
  12 import java.util.Collection;
  13 import java.util.Collections;
  14 import java.util.HashSet;
  15 import java.util.List;
  16 import java.util.Map;
  17 import java.util.Objects;
  18 import java.util.Set;
  19 import java.util.Timer;
  20 import java.util.TimerTask;
  21 import java.util.concurrent.Callable;
  22 import java.util.concurrent.ConcurrentHashMap;
  23 import java.util.concurrent.ExecutionException;
  24
  25 import org.opendaylight.controller.md.sal.binding.api.ClusteredDataTreeChangeListener;
  26 import org.opendaylight.controller.md.sal.binding.api.DataBroker;
  27 import org.opendaylight.controller.md.sal.binding.api.DataObjectModification;
  28 import org.opendaylight.controller.md.sal.binding.api.DataObjectModification.ModificationType;
  29 import org.opendaylight.controller.md.sal.binding.api.DataTreeIdentifier;
  30 import org.opendaylight.controller.md.sal.binding.api.DataTreeModification;
  31 import org.opendaylight.controller.md.sal.common.api.data.LogicalDatastoreType;
  32 import org.opendaylight.ovsdb.lib.message.TableUpdates;
  33 import org.opendaylight.ovsdb.lib.schema.DatabaseSchema;
  34 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.ovsdb.hwvtep.rev150901.HwvtepGlobalAugmentation;
  35 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.NetworkTopology;
  36 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.NodeId;
  37 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.network.topology.Topology;
  38 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.network.topology.TopologyKey;
  39 import org.opendaylight.yang.gen.v1.urn.tbd.params.xml.ns.yang.network.topology.rev131021.network.topology.topology.Node;
  40 import org.opendaylight.yangtools.concepts.ListenerRegistration;
  41 import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
  42 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
  43 import org.slf4j.Logger;
  44 import org.slf4j.LoggerFactory;
  45
  46 public class HwvtepOperGlobalListener implements ClusteredDataTreeChangeListener<Node>, AutoCloseable {
  47
  48     private static final Logger LOG = LoggerFactory.getLogger(HwvtepOperGlobalListener.class);
  49
  50     private Timer timer = new Timer();
  51     private ListenerRegistration<HwvtepOperGlobalListener> registration;
  52     private HwvtepConnectionManager hcm;
  53     private DataBroker db;
  54     private Map<YangInstanceIdentifier, Node> connectedNodes = new ConcurrentHashMap<>();
  55
  56     HwvtepOperGlobalListener(DataBroker db, HwvtepConnectionManager hcm) {
  57         LOG.info("Registering HwvtepOperGlobalListener");
  58         this.db = db;
  59         this.hcm = hcm;
  60         registerListener(db);
  61     }
  62
  63     private void registerListener(final DataBroker db) {
  64         final DataTreeIdentifier<Node> treeId =
  65                         new DataTreeIdentifier<Node>(LogicalDatastoreType.OPERATIONAL, getWildcardPath());
  66         try {
  67             registration = db.registerDataTreeChangeListener(treeId, HwvtepOperGlobalListener.this);
  68         } catch (final Exception e) {
  69             LOG.error("HwvtepDataChangeListener registration failed", e);
  70         }
  71     }
  72
  73     @Override
  74     public void close() throws Exception {
  75         if(registration != null) {
  76             registration.close();
  77         }
  78     }
  79
  80     @Override
  81     public void onDataTreeChanged(Collection<DataTreeModification<Node>> changes) {
  82         changes.forEach( (change) -> {
  83             InstanceIdentifier<Node> key = change.getRootPath().getRootIdentifier();
  84             DataObjectModification<Node> mod = change.getRootNode();
  85             InstanceIdentifier<Node> nodeIid = change.getRootPath().getRootIdentifier();
  86             YangInstanceIdentifier entityId =
  87                     HwvtepSouthboundUtil.getInstanceIdentifierCodec().getYangInstanceIdentifier(nodeIid);
  88             Node node = getCreated(mod);
  89             if (node != null) {
  90                 connectedNodes.put(entityId, node);
  91             }
  92             node = getRemoved(mod);
  93             if (node != null) {
  94                 connectedNodes.remove(entityId);
  95                 HwvtepConnectionInstance connectionInstance = hcm.getConnectionInstanceFromNodeIid(nodeIid);
  96                 if (Objects.equals(connectionInstance.getConnectionInfo().getRemotePort(),
  97                         HwvtepSouthboundUtil.getRemotePort(node))) {
  98                     //Oops some one deleted the node held by me This should never happen
  99                     try {
 100                         connectionInstance.refreshOperNode();
 101                     } catch (ExecutionException | InterruptedException e) {
 102                         LOG.error("Failed to refresh operational nodes ", e);
 103                     }
 104                 }
 105
 106             }
 107         });
 108     }
 109
 110     private Node getCreated(DataObjectModification<Node> mod) {
 111         if((mod.getModificationType() == ModificationType.WRITE)
 112                         && (mod.getDataBefore() == null)){
 113             return mod.getDataAfter();
 114         }
 115         return null;
 116     }
 117
 118     private Node getRemoved(DataObjectModification<Node> mod) {
 119         if(mod.getModificationType() == ModificationType.DELETE){
 120             return mod.getDataBefore();
 121         }
 122         return null;
 123     }
 124
 125     public Map<YangInstanceIdentifier, Node> getConnectedNodes() {
 126         return Collections.unmodifiableMap(connectedNodes);
 127     }
 128
 129     private InstanceIdentifier<Node> getWildcardPath() {
 130         InstanceIdentifier<Node> path = InstanceIdentifier
 131                         .create(NetworkTopology.class)
 132                         .child(Topology.class, new TopologyKey(HwvtepSouthboundConstants.HWVTEP_TOPOLOGY_ID))
 133                         .child(Node.class);
 134         return path;
 135     }
 136 }