elanmanager/elanmanager-impl/src/main/java/org/opendaylight/vpnservice/elan/l2gw/listeners/L2GatewayConnectionListener.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.elan.l2gw.listeners;
   9
  10 import org.opendaylight.controller.md.sal.binding.api.DataBroker;
  11 import org.opendaylight.controller.md.sal.binding.api.DataChangeListener;
  12 import org.opendaylight.controller.md.sal.common.api.data.AsyncDataBroker.DataChangeScope;
  13 import org.opendaylight.controller.md.sal.common.api.data.LogicalDatastoreType;
  14 import org.opendaylight.controller.md.sal.binding.api.ClusteredDataChangeListener;
  15 import org.opendaylight.vpnservice.datastoreutils.AsyncClusteredDataChangeListenerBase;
  16 import org.opendaylight.vpnservice.elan.internal.ElanInstanceManager;
  17 import org.opendaylight.vpnservice.elan.l2gw.utils.L2GatewayConnectionUtils;
  18 import org.opendaylight.yang.gen.v1.urn.opendaylight.neutron.l2gateways.rev150712.l2gateway.connections.attributes.L2gatewayConnections;
  19 import org.opendaylight.yang.gen.v1.urn.opendaylight.neutron.l2gateways.rev150712.l2gateway.connections.attributes.l2gatewayconnections.L2gatewayConnection;
  20 import org.opendaylight.yang.gen.v1.urn.opendaylight.neutron.rev150712.Neutron;
  21 import org.opendaylight.yangtools.concepts.ListenerRegistration;
  22 import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
  23 import org.slf4j.Logger;
  24 import org.slf4j.LoggerFactory;
  25
  26 public class L2GatewayConnectionListener extends AsyncClusteredDataChangeListenerBase<L2gatewayConnection,
  27         L2GatewayConnectionListener> implements AutoCloseable {
  28     private static final Logger LOG = LoggerFactory.getLogger(L2GatewayConnectionListener.class);
  29
  30     private ListenerRegistration<DataChangeListener> listenerRegistration;
  31     private final DataBroker broker;
  32     private ElanInstanceManager elanInstanceManager;
  33
  34     public L2GatewayConnectionListener(final DataBroker db, ElanInstanceManager elanInstanceManager) {
  35         super(L2gatewayConnection.class, L2GatewayConnectionListener.class);
  36         broker = db;
  37         this.elanInstanceManager = elanInstanceManager;
  38         registerListener(db);
  39     }
  40
  41     @Override
  42     public void close() throws Exception {
  43         if (listenerRegistration != null) {
  44             try {
  45                 listenerRegistration.close();
  46             } catch (final Exception e) {
  47                 LOG.error("Error when cleaning up DataChangeListener.", e);
  48             }
  49             listenerRegistration = null;
  50         }
  51         LOG.info("L2 Gateway Connection listener Closed");
  52     }
  53
  54     private void registerListener(final DataBroker db) {
  55         try {
  56             listenerRegistration = db.registerDataChangeListener(LogicalDatastoreType.CONFIGURATION,
  57                     InstanceIdentifier.create(Neutron.class).child(L2gatewayConnections.class)
  58                             .child(L2gatewayConnection.class),
  59                     L2GatewayConnectionListener.this, DataChangeScope.SUBTREE);
  60         } catch (final Exception e) {
  61             LOG.error("Neutron Manager L2 Gateway Connection DataChange listener registration fail!", e);
  62             throw new IllegalStateException(
  63                     "Neutron Manager L2 Gateway Connection DataChange listener registration failed.", e);
  64         }
  65     }
  66
  67     @Override
  68     protected void add(final InstanceIdentifier<L2gatewayConnection> identifier, final L2gatewayConnection input) {
  69         if (LOG.isTraceEnabled()) {
  70             LOG.trace("Adding L2gatewayConnection: {}", input);
  71         }
  72
  73         // Get associated L2GwId from 'input'
  74         // Create logical switch in each of the L2GwDevices part of L2Gw
  75         // Logical switch name is network UUID
  76         // Add L2GwDevices to ELAN
  77         L2GatewayConnectionUtils.addL2GatewayConnection(input);
  78     }
  79
  80     @Override
  81     protected void remove(InstanceIdentifier<L2gatewayConnection> identifier, L2gatewayConnection input) {
  82         if (LOG.isTraceEnabled()) {
  83             LOG.trace("Removing L2gatewayConnection: {}", input);
  84         }
  85
  86         L2GatewayConnectionUtils.deleteL2GatewayConnection(input);
  87     }
  88
  89     @Override
  90     protected void update(InstanceIdentifier<L2gatewayConnection> identifier, L2gatewayConnection original,
  91             L2gatewayConnection update) {
  92         if (LOG.isTraceEnabled()) {
  93             LOG.trace("Updating L2gatewayConnection : original value={}, updated value={}", original, update);
  94         }
  95     }
  96
  97     @Override
  98     protected InstanceIdentifier<L2gatewayConnection> getWildCardPath() {
  99         return InstanceIdentifier.create(L2gatewayConnection.class);
 100     }
 101
 102     @Override
 103     protected ClusteredDataChangeListener getDataChangeListener() {
 104         return L2GatewayConnectionListener.this;
 105     }
 106
 107     @Override
 108     protected DataChangeScope getDataChangeScope() {
 109         return DataChangeScope.BASE;
 110     }
 111 }