neutronvpn/neutronvpn-impl/src/main/java/org/opendaylight/vpnservice/neutronvpn/NeutronSubnetChangeListener.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.neutronvpn;
   9
  10 import com.google.common.base.Optional;
  11
  12 import org.opendaylight.controller.md.sal.binding.api.DataBroker;
  13 import org.opendaylight.controller.md.sal.binding.api.DataChangeListener;
  14 import org.opendaylight.controller.md.sal.common.api.data.AsyncDataBroker.DataChangeScope;
  15 import org.opendaylight.controller.md.sal.common.api.data.LogicalDatastoreType;
  16 import org.opendaylight.vpnservice.mdsalutil.AbstractDataChangeListener;
  17 import org.opendaylight.vpnservice.mdsalutil.MDSALUtil;
  18 import org.opendaylight.yang.gen.v1.urn.ietf.params.xml.ns.yang.ietf.yang.types.rev130715.Uuid;
  19 import org.opendaylight.yang.gen.v1.urn.opendaylight.neutron.rev150712.Neutron;
  20 import org.opendaylight.yang.gen.v1.urn.opendaylight.neutron.subnets.rev150712.subnets.attributes.Subnets;
  21 import org.opendaylight.yang.gen.v1.urn.opendaylight.neutron.subnets.rev150712.subnets.attributes.subnets.Subnet;
  22 import org.opendaylight.yang.gen.v1.urn.opendaylight.vpnservice.neutronvpn.rev150602.networkmaps.NetworkMap;
  23 import org.opendaylight.yang.gen.v1.urn.opendaylight.vpnservice.neutronvpn.rev150602.networkmaps.NetworkMapBuilder;
  24 import org.opendaylight.yang.gen.v1.urn.opendaylight.vpnservice.neutronvpn.rev150602.networkmaps.NetworkMapKey;
  25 import org.opendaylight.yangtools.concepts.ListenerRegistration;
  26 import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
  27 import org.slf4j.Logger;
  28 import org.slf4j.LoggerFactory;
  29
  30 import java.util.ArrayList;
  31 import java.util.List;
  32
  33
  34 public class NeutronSubnetChangeListener extends AbstractDataChangeListener<Subnet> implements AutoCloseable {
  35     private static final Logger LOG = LoggerFactory.getLogger(NeutronSubnetChangeListener.class);
  36
  37     private ListenerRegistration<DataChangeListener> listenerRegistration;
  38     private final DataBroker broker;
  39     private NeutronvpnManager nvpnManager;
  40
  41
  42     public NeutronSubnetChangeListener(final DataBroker db, NeutronvpnManager nVpnMgr) {
  43         super(Subnet.class);
  44         broker = db;
  45         nvpnManager = nVpnMgr;
  46         registerListener(db);
  47     }
  48
  49     @Override
  50     public void close() throws Exception {
  51         if (listenerRegistration != null) {
  52             try {
  53                 listenerRegistration.close();
  54             } catch (final Exception e) {
  55                 LOG.error("Error when cleaning up DataChangeListener.", e);
  56             }
  57             listenerRegistration = null;
  58         }
  59         LOG.info("N_Subnet listener Closed");
  60     }
  61
  62
  63     private void registerListener(final DataBroker db) {
  64         try {
  65             listenerRegistration = db.registerDataChangeListener(LogicalDatastoreType.CONFIGURATION,
  66                     InstanceIdentifier.create(Neutron.class).child(Subnets.class).child(Subnet.class),
  67                     NeutronSubnetChangeListener.this, DataChangeScope.SUBTREE);
  68         } catch (final Exception e) {
  69             LOG.error("Neutron Manager Subnet DataChange listener registration fail!", e);
  70             throw new IllegalStateException("Neutron Manager Subnet DataChange listener registration failed.", e);
  71         }
  72     }
  73
  74     @Override
  75     protected void add(InstanceIdentifier<Subnet> identifier, Subnet input) {
  76         if (LOG.isTraceEnabled()) {
  77             LOG.trace("Adding Subnet : key: " + identifier + ", value=" + input);
  78         }
  79         handleNeutronSubnetCreated(input.getUuid(), String.valueOf(input.getCidr().getValue()), input.getNetworkId(), input.getTenantId());
  80     }
  81
  82     @Override
  83     protected void remove(InstanceIdentifier<Subnet> identifier, Subnet input) {
  84         if (LOG.isTraceEnabled()) {
  85             LOG.trace("Removing subnet : key: " + identifier + ", value=" + input);
  86         }
  87         handleNeutronSubnetDeleted(input.getUuid(), input.getNetworkId(), null);
  88     }
  89
  90     @Override
  91     protected void update(InstanceIdentifier<Subnet> identifier, Subnet original, Subnet update) {
  92         if (LOG.isTraceEnabled()) {
  93             LOG.trace("Updating Subnet : key: " + identifier + ", original value=" + original + ", update value=" +
  94                     update);
  95         }
  96         handleNeutronSubnetUpdated(update.getUuid(), update.getNetworkId(), update.getTenantId());
  97     }
  98
  99     private void handleNeutronSubnetCreated(Uuid subnetId, String subnetIp, Uuid networkId, Uuid tenantId) {
 100         nvpnManager.updateSubnetNode(subnetId, subnetIp, tenantId, networkId, null, null, null);
 101         if (networkId != null && NeutronvpnUtils.getNeutronNetwork(broker, networkId) != null) {
 102             createSubnetToNetworkMapping(subnetId, networkId);
 103         }
 104     }
 105
 106     private void handleNeutronSubnetDeleted(Uuid subnetId, Uuid networkId, Uuid tenantId) {
 107         Uuid vpnId = NeutronvpnUtils.getVpnForNetwork(broker, networkId);
 108         if (vpnId != null) {
 109             nvpnManager.removeSubnetFromVpn(vpnId, subnetId);
 110         }
 111         if (networkId != null)  {
 112             deleteSubnetToNetworkMapping(subnetId, networkId);
 113         }
 114         nvpnManager.deleteSubnetMapNode(subnetId);
 115     }
 116
 117     private void handleNeutronSubnetUpdated(Uuid subnetId, Uuid networkId, Uuid tenantId) {
 118         Uuid oldNetworkId = NeutronvpnUtils.getSubnetmap(broker, subnetId).getNetworkId();
 119         if (oldNetworkId != null && !oldNetworkId.equals(networkId)) {
 120             deleteSubnetToNetworkMapping(subnetId, oldNetworkId);
 121         }
 122         if (networkId != null && !networkId.equals(oldNetworkId)) {
 123             createSubnetToNetworkMapping(subnetId, networkId);
 124         }
 125         nvpnManager.updateSubnetNode(subnetId, null, tenantId, networkId, null, null, null);
 126     }
 127
 128     private void createSubnetToNetworkMapping(Uuid subnetId, Uuid networkId) {
 129         try {
 130             InstanceIdentifier networkMapIdentifier = NeutronvpnUtils.buildNetworkMapIdentifier(networkId);
 131             Optional<NetworkMap> optionalNetworkMap = NeutronvpnUtils.read(broker, LogicalDatastoreType.CONFIGURATION,
 132                     networkMapIdentifier);
 133             NetworkMapBuilder nwMapBuilder = null;
 134             if (optionalNetworkMap.isPresent()) {
 135                 nwMapBuilder = new NetworkMapBuilder(optionalNetworkMap.get());
 136             } else {
 137                 nwMapBuilder = new NetworkMapBuilder().setKey(new NetworkMapKey(networkId)).setNetworkId(networkId);
 138                 LOG.debug("Adding a new network node in NetworkMaps DS for network {}", networkId.getValue());
 139             }
 140             List<Uuid> subnetIdList = nwMapBuilder.getSubnetIdList();
 141             if (subnetIdList == null) {
 142                 subnetIdList = new ArrayList<>();
 143             }
 144             subnetIdList.add(subnetId);
 145             nwMapBuilder.setSubnetIdList(subnetIdList);
 146             MDSALUtil.syncWrite(broker, LogicalDatastoreType.CONFIGURATION, networkMapIdentifier, nwMapBuilder.build());
 147             LOG.debug("Created subnet-network mapping for subnet {} network {}", subnetId.getValue(),
 148                     networkId.getValue());
 149         } catch (Exception e) {
 150             LOG.error("Create subnet-network mapping failed for subnet {} network {}", subnetId.getValue(),
 151                     networkId.getValue());
 152         }
 153     }
 154
 155     private void deleteSubnetToNetworkMapping(Uuid subnetId, Uuid networkId) {
 156         try {
 157             InstanceIdentifier networkMapIdentifier = NeutronvpnUtils.buildNetworkMapIdentifier(networkId);
 158             Optional<NetworkMap> optionalNetworkMap = NeutronvpnUtils.read(broker, LogicalDatastoreType.CONFIGURATION,
 159                     networkMapIdentifier);
 160             if (optionalNetworkMap.isPresent()) {
 161                 NetworkMapBuilder nwMapBuilder = new NetworkMapBuilder(optionalNetworkMap.get());
 162                 List<Uuid> subnetIdList = nwMapBuilder.getSubnetIdList();
 163                 if (subnetIdList.remove(subnetId)) {
 164                     if (subnetIdList.size() == 0) {
 165                         MDSALUtil.syncDelete(broker, LogicalDatastoreType.CONFIGURATION, networkMapIdentifier);
 166                         LOG.debug("Deleted network node in NetworkMaps DS for network {}", subnetId.getValue(),
 167                                 networkId.getValue());
 168                     } else {
 169                         nwMapBuilder.setSubnetIdList(subnetIdList);
 170                         MDSALUtil.syncWrite(broker, LogicalDatastoreType.CONFIGURATION, networkMapIdentifier,
 171                                 nwMapBuilder.build());
 172                         LOG.debug("Deleted subnet-network mapping for subnet {} network {}", subnetId.getValue(),
 173                                 networkId.getValue());
 174                     }
 175                 } else {
 176                     LOG.error("Subnet {} is not mapped to network {}", subnetId.getValue(), networkId.getValue());
 177                 }
 178             } else {
 179                 LOG.error("network {} not present for subnet {} ", networkId, subnetId);
 180             }
 181         } catch (Exception e) {
 182             LOG.error("Delete subnet-network mapping failed for subnet {} network {}", subnetId.getValue(),
 183                     networkId.getValue());
 184         }
 185     }
 186 }