elanmanager/impl/src/main/java/org/opendaylight/netvirt/elan/cache/ElanInterfaceCache.java

   1 /*
   2  * Copyright (c) 2017 Inocybe Technologies 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.cache;
   9
  10 import com.google.common.base.Optional;
  11 import java.util.Collection;
  12 import java.util.Collections;
  13 import java.util.Map;
  14 import java.util.Set;
  15 import java.util.concurrent.ConcurrentHashMap;
  16 import javax.annotation.Nonnull;
  17 import javax.inject.Inject;
  18 import javax.inject.Singleton;
  19 import org.opendaylight.controller.md.sal.binding.api.DataBroker;
  20 import org.opendaylight.controller.md.sal.common.api.data.LogicalDatastoreType;
  21 import org.opendaylight.controller.md.sal.common.api.data.ReadFailedException;
  22 import org.opendaylight.genius.mdsalutil.cache.InstanceIdDataObjectCache;
  23 import org.opendaylight.infrautils.caches.CacheProvider;
  24 import org.opendaylight.netvirt.elan.utils.ElanUtils;
  25 import org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.elan.etree.rev160614.EtreeInterface;
  26 import org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.elan.rev150602.ElanInterfaces;
  27 import org.opendaylight.yang.gen.v1.urn.opendaylight.netvirt.elan.rev150602.elan.interfaces.ElanInterface;
  28 import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
  29 import org.slf4j.Logger;
  30 import org.slf4j.LoggerFactory;
  31
  32 /**
  33  * Caches ElanInterface instances by name and the set of ElanInterfacenames by elen instance name.
  34  *
  35  * @author Thomas Pantelis
  36  */
  37 @Singleton
  38 public class ElanInterfaceCache extends InstanceIdDataObjectCache<ElanInterface> {
  39
  40     private static final Logger LOG = LoggerFactory.getLogger(ElanInterfaceCache.class);
  41
  42     private final Map<String, Set<String>> elanInstanceToInterfacesCache = new ConcurrentHashMap<>();
  43
  44     @Inject
  45     public ElanInterfaceCache(DataBroker dataBroker, CacheProvider cacheProvider) {
  46         super(ElanInterface.class, dataBroker, LogicalDatastoreType.CONFIGURATION,
  47                 InstanceIdentifier.create(ElanInterfaces.class).child(ElanInterface.class), cacheProvider);
  48     }
  49
  50     @Nonnull
  51     public Optional<ElanInterface> get(@Nonnull String interfaceName) {
  52         try {
  53             return get(ElanUtils.getElanInterfaceConfigurationDataPathId(interfaceName));
  54         } catch (ReadFailedException e) {
  55             LOG.warn("Error reading ElanInterface {}", interfaceName, e);
  56             return Optional.absent();
  57         }
  58     }
  59
  60     @Nonnull
  61     public Optional<EtreeInterface> getEtreeInterface(@Nonnull String interfaceName) {
  62         Optional<ElanInterface> elanInterface = get(interfaceName);
  63         return elanInterface.isPresent() ? Optional.fromNullable(
  64                 elanInterface.get().getAugmentation(EtreeInterface.class)) : Optional.absent();
  65     }
  66
  67     @Nonnull
  68     public Collection<String> getInterfaceNames(@Nonnull String elanInstanceName) {
  69         Set<String> removed = elanInstanceToInterfacesCache.remove(elanInstanceName);
  70         return removed != null ? Collections.unmodifiableCollection(removed) : Collections.emptySet();
  71     }
  72
  73     @Override
  74     protected void added(InstanceIdentifier<ElanInterface> path, ElanInterface elanInterface) {
  75         elanInstanceToInterfacesCache.computeIfAbsent(elanInterface.getElanInstanceName(),
  76             key -> ConcurrentHashMap.newKeySet()).add(elanInterface.getName());
  77     }
  78
  79     @Override
  80     protected void removed(InstanceIdentifier<ElanInterface> path, ElanInterface elanInterface) {
  81         String elanInstanceName = elanInterface.getElanInstanceName();
  82         elanInstanceToInterfacesCache.computeIfPresent(elanInstanceName , (key, prevInterfacesSet) -> {
  83             prevInterfacesSet.remove(elanInterface.getName());
  84             return !prevInterfacesSet.isEmpty() ? prevInterfacesSet : null;
  85         });
  86     }
  87 }