elanmanager/impl/src/main/java/org/opendaylight/netvirt/elan/l2gw/listeners/ElanInstanceListener.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.netvirt.elan.l2gw.listeners;
   9
  10 import static org.opendaylight.genius.infra.Datastore.CONFIGURATION;
  11
  12 import com.google.common.util.concurrent.ListenableFuture;
  13 import java.util.Collections;
  14 import java.util.List;
  15 import javax.annotation.PreDestroy;
  16 import javax.inject.Inject;
  17 import javax.inject.Singleton;
  18 import org.opendaylight.genius.infra.ManagedNewTransactionRunner;
  19 import org.opendaylight.genius.infra.ManagedNewTransactionRunnerImpl;
  20 import org.opendaylight.infrautils.utils.concurrent.Executors;
  21 import org.opendaylight.infrautils.utils.concurrent.LoggingFutures;
  22 import org.opendaylight.mdsal.binding.api.DataBroker;
  23 import org.opendaylight.mdsal.common.api.LogicalDatastoreType;
  24 import org.opendaylight.netvirt.elan.l2gw.recovery.impl.L2GatewayServiceRecoveryHandler;
  25 import org.opendaylight.netvirt.elan.l2gw.utils.L2GatewayConnectionUtils;
  26 import org.opendaylight.netvirt.elan.utils.ElanClusterUtils;
  27 import org.opendaylight.serviceutils.srm.RecoverableListener;
  28 import org.opendaylight.serviceutils.srm.ServiceRecoveryRegistry;
  29 import org.opendaylight.serviceutils.tools.listener.AbstractClusteredAsyncDataTreeChangeListener;
  30 import org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.elan.rev150602.ElanInstances;
  31 import org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.elan.rev150602.elan.instances.ElanInstance;
  32 import org.opendaylight.yang.gen.v1.urn.opendaylight.neutron.l2gateways.rev150712.l2gateway.connections.attributes.L2gatewayConnections;
  33 import org.opendaylight.yang.gen.v1.urn.opendaylight.neutron.l2gateways.rev150712.l2gateway.connections.attributes.l2gatewayconnections.L2gatewayConnection;
  34 import org.opendaylight.yang.gen.v1.urn.opendaylight.neutron.rev150712.Neutron;
  35 import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
  36 import org.slf4j.Logger;
  37 import org.slf4j.LoggerFactory;
  38
  39 @Singleton
  40 public class ElanInstanceListener extends AbstractClusteredAsyncDataTreeChangeListener<ElanInstance>
  41         implements RecoverableListener {
  42
  43     private static final Logger LOG = LoggerFactory.getLogger(ElanInstanceListener.class);
  44
  45     private final DataBroker broker;
  46     private final ManagedNewTransactionRunner txRunner;
  47     private final ElanClusterUtils elanClusterUtils;
  48
  49     @Inject
  50     public ElanInstanceListener(final DataBroker db, final ElanClusterUtils elanClusterUtils,
  51                                 final L2GatewayServiceRecoveryHandler l2GatewayServiceRecoveryHandler,
  52                                 final ServiceRecoveryRegistry serviceRecoveryRegistry) {
  53         super(db, LogicalDatastoreType.CONFIGURATION, InstanceIdentifier.create(ElanInstances.class)
  54                 .child(ElanInstance.class),
  55                 Executors.newListeningSingleThreadExecutor("ElanInstanceListener", LOG));
  56         broker = db;
  57         this.txRunner = new ManagedNewTransactionRunnerImpl(db);
  58         this.elanClusterUtils = elanClusterUtils;
  59         serviceRecoveryRegistry.addRecoverableListener(l2GatewayServiceRecoveryHandler.buildServiceRegistryKey(), this);
  60     }
  61
  62     public void init() {
  63         registerListener();
  64     }
  65
  66     @Override
  67     @PreDestroy
  68     public void close() {
  69         super.close();
  70         Executors.shutdownAndAwaitTermination(getExecutorService());
  71     }
  72
  73     @Override
  74     public void registerListener() {
  75         super.register();
  76         LOG.info("Registering ElanInstanceListener");
  77     }
  78
  79     public void deregisterListener() {
  80         super.close();
  81         LOG.info("Deregistering ElanInstanceListener");
  82     }
  83
  84     @Override
  85     public void remove(final InstanceIdentifier<ElanInstance> identifier,
  86                           final ElanInstance del) {
  87         elanClusterUtils.runOnlyInOwnerNode(del.getElanInstanceName(), "delete Elan instance",
  88             () -> {
  89                 LOG.info("Elan instance {} deleted from Configuration tree ", del);
  90                 List<L2gatewayConnection> connections =
  91                         L2GatewayConnectionUtils.getL2GwConnectionsByElanName(
  92                                 this.broker, del.getElanInstanceName());
  93                 if (connections.isEmpty()) {
  94                     return Collections.emptyList();
  95                 }
  96                 ListenableFuture<Void> future = txRunner.callWithNewReadWriteTransactionAndSubmit(CONFIGURATION,
  97                     tx -> {
  98                         for (L2gatewayConnection connection : connections) {
  99                             InstanceIdentifier<L2gatewayConnection> iid =
 100                                     InstanceIdentifier.create(Neutron.class).child(
 101                                             L2gatewayConnections.class).child(
 102                                             L2gatewayConnection.class, connection.key());
 103                             tx.delete(iid);
 104                         }
 105                     });
 106                 LoggingFutures.addErrorLogging(future, LOG,
 107                         "Failed to delete associate L2 gateway connection while deleting network");
 108                 return Collections.singletonList(future);
 109             });
 110     }
 111
 112     @Override
 113     public void update(InstanceIdentifier<ElanInstance> identifier, ElanInstance original, ElanInstance update) {
 114
 115     }
 116
 117     @Override
 118     public void add(InstanceIdentifier<ElanInstance> identifier, ElanInstance add) {
 119     }
 120 }