interfacemanager/interfacemanager-impl/src/main/java/org/opendaylight/genius/interfacemanager/listeners/InterfaceChildCache.java

   1 /*
   2  * Copyright (c) 2017, 2018 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
   9 package org.opendaylight.genius.interfacemanager.listeners;
  10
  11 import java.util.Collections;
  12 import java.util.List;
  13 import java.util.Optional;
  14 import javax.inject.Inject;
  15 import javax.inject.Singleton;
  16
  17 import org.apache.aries.blueprint.annotation.service.Reference;
  18 import org.opendaylight.genius.mdsalutil.cache.InstanceIdDataObjectCache;
  19 import org.opendaylight.infrautils.caches.CacheProvider;
  20 import org.opendaylight.mdsal.binding.api.DataBroker;
  21 import org.opendaylight.mdsal.common.api.LogicalDatastoreType;
  22 import org.opendaylight.mdsal.common.api.ReadFailedException;
  23 import org.opendaylight.yang.gen.v1.urn.opendaylight.genius.interfacemanager.meta.rev160406.InterfaceChildInfo;
  24 import org.opendaylight.yang.gen.v1.urn.opendaylight.genius.interfacemanager.meta.rev160406._interface.child.info.InterfaceParentEntry;
  25 import org.opendaylight.yang.gen.v1.urn.opendaylight.genius.interfacemanager.meta.rev160406._interface.child.info.InterfaceParentEntryKey;
  26 import org.opendaylight.yang.gen.v1.urn.opendaylight.genius.interfacemanager.meta.rev160406._interface.child.info._interface.parent.entry.InterfaceChildEntry;
  27 import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
  28 import org.slf4j.Logger;
  29 import org.slf4j.LoggerFactory;
  30
  31 @Singleton
  32 public class InterfaceChildCache {
  33     private static final Logger LOG = LoggerFactory.getLogger(InterfaceChildCache.class);
  34
  35     private final InstanceIdDataObjectCache<InterfaceParentEntry> dataObjectCache;
  36
  37     @Inject
  38     public InterfaceChildCache(@Reference final DataBroker dataBroker, final @Reference CacheProvider cacheProvider) {
  39         dataObjectCache = new InstanceIdDataObjectCache<>(InterfaceParentEntry.class,
  40                 dataBroker, LogicalDatastoreType.CONFIGURATION,
  41                 InstanceIdentifier.create(InterfaceChildInfo.class).child(InterfaceParentEntry.class),
  42                 cacheProvider);
  43     }
  44
  45     public Optional<List<InterfaceChildEntry>> getInterfaceChildEntries(String parentInterfaceName) {
  46         try {
  47             Optional<InterfaceParentEntry> interfaceParentEntry = dataObjectCache.get(
  48                     getInterfaceParentEntryIdentifier(parentInterfaceName));
  49             if (interfaceParentEntry.isPresent()) {
  50                 List<InterfaceChildEntry> interfaceChildEntries = interfaceParentEntry.get()
  51                         .getInterfaceChildEntry() != null ? interfaceParentEntry.get()
  52                         .getInterfaceChildEntry() : Collections.emptyList();
  53                 return Optional.of(Collections.unmodifiableList(interfaceChildEntries));
  54             }
  55         } catch (ReadFailedException ex) {
  56             LOG.error("ReadFailedException exception", ex);
  57         }
  58         return Optional.empty();
  59     }
  60
  61     private InstanceIdentifier<InterfaceParentEntry> getInterfaceParentEntryIdentifier(String parentInterfaceName) {
  62         InstanceIdentifier.InstanceIdentifierBuilder<InterfaceParentEntry> intfIdBuilder =
  63                 InstanceIdentifier.builder(InterfaceChildInfo.class)
  64                         .child(InterfaceParentEntry.class, new InterfaceParentEntryKey(parentInterfaceName));
  65         return intfIdBuilder.build();
  66     }
  67 }