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.controller.md.sal.binding.api.ClusteredDataChangeListener;
  11
  12 import org.opendaylight.vpnservice.datastoreutils.AsyncClusteredDataChangeListenerBase;
  13 import org.opendaylight.yang.gen.v1.urn.opendaylight.vpnservice.neutronvpn.rev150602.dhcp.config.Configs;
  14 import org.opendaylight.controller.md.sal.common.api.data.AsyncDataBroker.DataChangeScope;
  15 import org.opendaylight.vpnservice.datastoreutils.AsyncDataChangeListenerBase;
  16 import org.opendaylight.yang.gen.v1.urn.opendaylight.vpnservice.neutronvpn.rev150602.DhcpConfig;
  17 import org.opendaylight.controller.md.sal.binding.api.DataBroker;
  18 import org.opendaylight.controller.md.sal.binding.api.DataChangeListener;
  19 import org.opendaylight.controller.md.sal.common.api.data.AsyncDataBroker;
  20 import org.opendaylight.controller.md.sal.common.api.data.LogicalDatastoreType;
  21 import org.opendaylight.vpnservice.dhcpservice.api.DHCPMConstants;
  22 import org.opendaylight.yangtools.concepts.ListenerRegistration;
  23 import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
  24 import org.slf4j.Logger;
  25 import org.slf4j.LoggerFactory;
  26
  27 public class DhcpConfigListener extends AsyncClusteredDataChangeListenerBase<DhcpConfig, DhcpConfigListener> implements AutoCloseable {
  28
  29     private static final Logger LOG = LoggerFactory.getLogger(DhcpConfigListener.class);
  30
  31     private ListenerRegistration<DataChangeListener> listenerRegistration;
  32     private DhcpManager dhcpManager;
  33
  34     public DhcpConfigListener(final DataBroker db, final DhcpManager dhcpMgr) {
  35         super(DhcpConfig.class, DhcpConfigListener.class);
  36         dhcpManager = dhcpMgr;
  37         registerListener(db);
  38     }
  39
  40     private void registerListener(final DataBroker db) {
  41         try {
  42             listenerRegistration = db.registerDataChangeListener(LogicalDatastoreType.CONFIGURATION,
  43                     getWildCardPath(), DhcpConfigListener.this, AsyncDataBroker.DataChangeScope.SUBTREE);
  44         } catch (final Exception e) {
  45             LOG.error("NodeListener: DataChange listener registration fail!", e);
  46             throw new IllegalStateException("NodeListener: registration Listener failed.", e);
  47         }
  48     }
  49
  50     protected InstanceIdentifier<DhcpConfig> getWildCardPath() {
  51         return InstanceIdentifier.create(DhcpConfig.class);
  52     }
  53
  54     @Override
  55     public void close() throws Exception {
  56         if (listenerRegistration != null) {
  57             try {
  58                 listenerRegistration.close();
  59             } catch (final Exception e) {
  60                 LOG.error("Error when cleaning up DhcpConfigListener.", e);
  61             }
  62             listenerRegistration = null;
  63         }
  64         LOG.debug("DhcpConfig Listener Closed");
  65     }
  66
  67     @Override
  68     protected void remove(InstanceIdentifier<DhcpConfig> identifier, DhcpConfig del) {
  69         LOG.trace("DhcpConfig removed: {}", del);
  70         updateConfig(null);
  71     }
  72
  73     @Override
  74     protected void update(InstanceIdentifier<DhcpConfig> identifier, DhcpConfig original, DhcpConfig update) {
  75         LOG.trace("DhcpConfig changed to {}", update);
  76         updateConfig(update);
  77     }
  78
  79     @Override
  80     protected void add(InstanceIdentifier<DhcpConfig> identifier, DhcpConfig add) {
  81         LOG.trace("DhcpConfig added {}", add);
  82         updateConfig(add);
  83     }
  84
  85     private void updateConfig(DhcpConfig update) {
  86         //TODO: Update operational with actual values
  87         if(update == null || update.getConfigs() == null || update.getConfigs().isEmpty()) {
  88             dhcpManager.setLeaseDuration(DHCPMConstants.DEFAULT_LEASE_TIME);
  89             dhcpManager.setDefaultDomain(DHCPMConstants.DEFAULT_DOMAIN_NAME);
  90             return;
  91         }
  92         Configs config = update.getConfigs().get(0);
  93         if(config.getLeaseDuration() != null) {
  94             dhcpManager.setLeaseDuration(config.getLeaseDuration());
  95         }
  96         if(config.getDefaultDomain() != null) {
  97             dhcpManager.setDefaultDomain(config.getDefaultDomain());
  98             //TODO: What to do if string is ""
  99         }
 100     }
 101
 102     @Override
 103     protected ClusteredDataChangeListener getDataChangeListener() {
 104         return DhcpConfigListener.this;
 105     }
 106
 107     @Override
 108     protected DataChangeScope getDataChangeScope() {
 109         return AsyncDataBroker.DataChangeScope.BASE;
 110     }
 111 }