elanmanager/impl/src/main/java/org/opendaylight/netvirt/elan/l2gw/listeners/ElanInstanceEntityOwnershipListener.java

   1 /*
   2  * Copyright (c) 2019 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.mdsal.binding.util.Datastore.CONFIGURATION;
  11 import static org.opendaylight.mdsal.binding.util.Datastore.OPERATIONAL;
  12 import static org.opendaylight.netvirt.elan.utils.ElanConstants.ELAN_EOS_DELAY;
  13
  14 import java.util.ArrayList;
  15 import java.util.List;
  16 import java.util.Optional;
  17 import java.util.concurrent.ExecutionException;
  18 import java.util.concurrent.ScheduledFuture;
  19 import java.util.concurrent.TimeUnit;
  20 import javax.inject.Inject;
  21 import javax.inject.Singleton;
  22 import org.opendaylight.genius.utils.batching.ResourceBatchingManager;
  23 import org.opendaylight.genius.utils.hwvtep.HwvtepSouthboundConstants;
  24 import org.opendaylight.mdsal.binding.api.DataBroker;
  25 import org.opendaylight.mdsal.binding.util.ManagedNewTransactionRunner;
  26 import org.opendaylight.mdsal.binding.util.ManagedNewTransactionRunnerImpl;
  27 import org.opendaylight.mdsal.eos.binding.api.EntityOwnershipChange;
  28 import org.opendaylight.mdsal.eos.binding.api.EntityOwnershipListener;
  29 import org.opendaylight.mdsal.eos.binding.api.EntityOwnershipService;
  30 import org.opendaylight.netvirt.elan.internal.ElanDpnInterfaceClusteredListener;
  31 import org.opendaylight.netvirt.elan.utils.Scheduler;
  32 import org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.elan.rev150602.ElanDpnInterfaces;
  33 import org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.elan.rev150602.elan.dpn.interfaces.ElanDpnInterfacesList;
  34 import org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.elan.rev150602.elan.dpn.interfaces.ElanDpnInterfacesListKey;
  35 import org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.elan.rev150602.elan.dpn.interfaces.elan.dpn.interfaces.list.DpnInterfaces;
  36 import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
  37 import org.slf4j.Logger;
  38 import org.slf4j.LoggerFactory;
  39
  40 @Singleton
  41 public class ElanInstanceEntityOwnershipListener implements EntityOwnershipListener {
  42
  43     private static final Logger LOG = LoggerFactory.getLogger(ElanInstanceEntityOwnershipListener.class);
  44
  45     private final L2GatewayConnectionListener l2GatewayConnectionListener;
  46     private final ElanDpnInterfaceClusteredListener elanDpnInterfaceClusteredListener;
  47     private final Scheduler scheduler;
  48     private final DataBroker dataBroker;
  49     volatile ScheduledFuture<?> ft;
  50     private final ManagedNewTransactionRunner txRunner;
  51
  52     @Inject
  53     public ElanInstanceEntityOwnershipListener(L2GatewayConnectionListener l2GatewayConnectionListener,
  54                                         ElanDpnInterfaceClusteredListener elanDpnInterfaceClusteredListener,
  55                                         Scheduler scheduler, DataBroker dataBroker,
  56                                         EntityOwnershipService entityOwnershipService) {
  57         this.l2GatewayConnectionListener = l2GatewayConnectionListener;
  58         this.elanDpnInterfaceClusteredListener = elanDpnInterfaceClusteredListener;
  59         this.scheduler = scheduler;
  60         this.dataBroker = dataBroker;
  61         this.txRunner = new ManagedNewTransactionRunnerImpl(dataBroker);
  62         entityOwnershipService.registerListener(HwvtepSouthboundConstants.ELAN_ENTITY_TYPE, this);
  63         ResourceBatchingManager.getInstance().registerDefaultBatchHandlers(this.dataBroker);
  64     }
  65
  66     @SuppressWarnings("checkstyle:IllegalCatch")
  67     @Override
  68     public void ownershipChanged(EntityOwnershipChange ownershipChange) {
  69         LOG.info("Entity Ownership changed for the entity: {}" , ownershipChange);
  70         if (!ownershipChange.getState().isOwner()) {
  71             if (ft != null) {
  72                 ft.cancel(false);
  73                 ft = null;
  74             }
  75             return;
  76         }
  77
  78         if (!ownershipChange.getState().wasOwner() && ownershipChange.getState().isOwner()) {
  79             if (ft != null) {
  80                 ft.cancel(false);
  81                 ft = null;
  82             }
  83             ft = scheduler.getScheduledExecutorService().schedule(() -> {
  84                 try {
  85                     //check if i'm the owner
  86                     if (ownershipChange.getState().isOwner()) {
  87                         LOG.info("Elan Entity owner is: {}", ownershipChange);
  88
  89                         txRunner.callWithNewReadOnlyTransactionAndClose(CONFIGURATION, tx -> {
  90                             l2GatewayConnectionListener.loadL2GwConnectionCache(tx);
  91                         });
  92
  93                         InstanceIdentifier<ElanDpnInterfaces> elanDpnInterfacesInstanceIdentifier = InstanceIdentifier
  94                                 .builder(ElanDpnInterfaces.class).build();
  95
  96                         txRunner.callWithNewReadOnlyTransactionAndClose(OPERATIONAL, tx -> {
  97                             Optional<ElanDpnInterfaces> optional = Optional.empty();
  98                             try {
  99                                 optional = tx.read(elanDpnInterfacesInstanceIdentifier).get();
 100                             } catch (ExecutionException | InterruptedException e) {
 101                                 LOG.error("Exception While reading ElanDpnInterfaces", e);
 102                             }
 103                             if (optional.isPresent()
 104                                 && optional.get().getElanDpnInterfacesList() != null) {
 105                                 LOG.debug("Found elan dpn interfaces list");
 106                                 optional.get().nonnullElanDpnInterfacesList().values()
 107                                     .forEach(elanDpnInterfacesList -> {
 108                                         List<DpnInterfaces> dpnInterfaces = new ArrayList<>(
 109                                             elanDpnInterfacesList.nonnullDpnInterfaces().values());
 110                                         InstanceIdentifier<ElanDpnInterfacesList> parentIid = InstanceIdentifier
 111                                             .builder(ElanDpnInterfaces.class)
 112                                             .child(ElanDpnInterfacesList.class,
 113                                                 new ElanDpnInterfacesListKey(
 114                                                     elanDpnInterfacesList
 115                                                         .getElanInstanceName())).build();
 116                                         for (DpnInterfaces dpnInterface : dpnInterfaces) {
 117                                             LOG.debug("Found elan dpn interfaces");
 118                                             elanDpnInterfaceClusteredListener.add(parentIid
 119                                                     .child(DpnInterfaces.class, dpnInterface.key()),
 120                                                 dpnInterface);
 121                                         }
 122                                     });
 123                             }
 124                         });
 125
 126                     } else {
 127                         LOG.info("Not the owner for Elan entity {}", ownershipChange);
 128                     }
 129                     ft = null;
 130                 } catch (Exception e) {
 131                     LOG.error("Failed to read mdsal ", e);
 132                 }
 133             }, ELAN_EOS_DELAY, TimeUnit.MINUTES);
 134         }
 135     }
 136 }