dhcpservice/dhcpservice-impl/src/main/java/org/opendaylight/vpnservice/dhcpservice/DhcpConfigListener.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.dhcpservice;
   9
  10 import org.opendaylight.yang.gen.v1.urn.opendaylight.vpnservice.neutronvpn.rev150602.dhcp.config.Configs;
  11
  12 import org.opendaylight.controller.md.sal.common.api.data.AsyncDataBroker.DataChangeScope;
  13 import org.opendaylight.vpnservice.datastoreutils.AsyncDataChangeListenerBase;
  14 import org.opendaylight.yang.gen.v1.urn.opendaylight.vpnservice.neutronvpn.rev150602.DhcpConfig;
  15 import org.opendaylight.controller.md.sal.binding.api.DataBroker;
  16 import org.opendaylight.controller.md.sal.binding.api.DataChangeListener;
  17 import org.opendaylight.controller.md.sal.common.api.data.AsyncDataBroker;
  18 import org.opendaylight.controller.md.sal.common.api.data.LogicalDatastoreType;
  19 import org.opendaylight.vpnservice.dhcpservice.api.DHCPMConstants;
  20 import org.opendaylight.yangtools.concepts.ListenerRegistration;
  21 import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
  22 import org.slf4j.Logger;
  23 import org.slf4j.LoggerFactory;
  24
  25 public class DhcpConfigListener extends AsyncDataChangeListenerBase<DhcpConfig, DhcpConfigListener> implements AutoCloseable {
  26
  27     private static final Logger LOG = LoggerFactory.getLogger(DhcpConfigListener.class);
  28
  29     private ListenerRegistration<DataChangeListener> listenerRegistration;
  30     private DhcpManager dhcpManager;
  31
  32     public DhcpConfigListener(final DataBroker db, final DhcpManager dhcpMgr) {
  33         super(DhcpConfig.class, DhcpConfigListener.class);
  34         dhcpManager = dhcpMgr;
  35         registerListener(db);
  36     }
  37
  38     private void registerListener(final DataBroker db) {
  39         try {
  40             listenerRegistration = db.registerDataChangeListener(LogicalDatastoreType.CONFIGURATION,
  41                     getWildCardPath(), DhcpConfigListener.this, AsyncDataBroker.DataChangeScope.SUBTREE);
  42         } catch (final Exception e) {
  43             LOG.error("NodeListener: DataChange listener registration fail!", e);
  44             throw new IllegalStateException("NodeListener: registration Listener failed.", e);
  45         }
  46     }
  47
  48     protected InstanceIdentifier<DhcpConfig> getWildCardPath() {
  49         return InstanceIdentifier.create(DhcpConfig.class);
  50     }
  51
  52     @Override
  53     public void close() throws Exception {
  54         if (listenerRegistration != null) {
  55             try {
  56                 listenerRegistration.close();
  57             } catch (final Exception e) {
  58                 LOG.error("Error when cleaning up DhcpConfigListener.", e);
  59             }
  60             listenerRegistration = null;
  61         }
  62         LOG.debug("DhcpConfig Listener Closed");
  63     }
  64
  65     @Override
  66     protected void remove(InstanceIdentifier<DhcpConfig> identifier, DhcpConfig del) {
  67         LOG.trace("DhcpConfig removed: {}", del);
  68         updateConfig(null);
  69     }
  70
  71     @Override
  72     protected void update(InstanceIdentifier<DhcpConfig> identifier, DhcpConfig original, DhcpConfig update) {
  73         LOG.trace("DhcpConfig changed to {}", update);
  74         updateConfig(update);
  75     }
  76
  77     @Override
  78     protected void add(InstanceIdentifier<DhcpConfig> identifier, DhcpConfig add) {
  79         LOG.trace("DhcpConfig added {}", add);
  80         updateConfig(add);
  81     }
  82
  83     private void updateConfig(DhcpConfig update) {
  84         //TODO: Update operational with actual values
  85         if(update == null || update.getConfigs() == null || update.getConfigs().isEmpty()) {
  86             dhcpManager.setLeaseDuration(DHCPMConstants.DEFAULT_LEASE_TIME);
  87             dhcpManager.setDefaultDomain(DHCPMConstants.DEFAULT_DOMAIN_NAME);
  88             return;
  89         }
  90         Configs config = update.getConfigs().get(0);
  91         if(config.getLeaseDuration() != null) {
  92             dhcpManager.setLeaseDuration(config.getLeaseDuration());
  93         }
  94         if(config.getDefaultDomain() != null) {
  95             dhcpManager.setDefaultDomain(config.getDefaultDomain());
  96             //TODO: What to do if string is ""
  97         }
  98     }
  99
 100     @Override
 101     protected DataChangeListener getDataChangeListener() {
 102         return DhcpConfigListener.this;
 103     }
 104
 105     @Override
 106     protected DataChangeScope getDataChangeScope() {
 107         return AsyncDataBroker.DataChangeScope.BASE;
 108     }
 109 }