bgp/openconfig-rp-statement/src/main/java/org/opendaylight/protocol/bgp/openconfig/routing/policy/statement/AbstractCommunityHandler.java

   1 /*
   2  * Copyright (c) 2018 AT&T Intellectual Property. 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.protocol.bgp.openconfig.routing.policy.statement;
   9
  10 import static java.util.Objects.requireNonNull;
  11
  12 import com.google.common.cache.CacheBuilder;
  13 import com.google.common.cache.CacheLoader;
  14 import com.google.common.cache.LoadingCache;
  15 import java.util.Collections;
  16 import java.util.List;
  17 import java.util.Optional;
  18 import java.util.concurrent.ExecutionException;
  19 import java.util.stream.Collectors;
  20 import org.opendaylight.mdsal.binding.api.DataBroker;
  21 import org.opendaylight.mdsal.binding.api.ReadTransaction;
  22 import org.opendaylight.mdsal.common.api.LogicalDatastoreType;
  23 import org.opendaylight.yang.gen.v1.http.openconfig.net.yang.bgp.policy.rev151009.DefinedSets1;
  24 import org.opendaylight.yang.gen.v1.http.openconfig.net.yang.bgp.policy.rev151009.routing.policy.defined.sets.BgpDefinedSets;
  25 import org.opendaylight.yang.gen.v1.http.openconfig.net.yang.bgp.policy.rev151009.routing.policy.defined.sets.bgp.defined.sets.CommunitySets;
  26 import org.opendaylight.yang.gen.v1.http.openconfig.net.yang.bgp.policy.rev151009.routing.policy.defined.sets.bgp.defined.sets.community.sets.CommunitySet;
  27 import org.opendaylight.yang.gen.v1.http.openconfig.net.yang.bgp.policy.rev151009.routing.policy.defined.sets.bgp.defined.sets.community.sets.CommunitySetKey;
  28 import org.opendaylight.yang.gen.v1.http.openconfig.net.yang.routing.policy.rev151009.routing.policy.top.RoutingPolicy;
  29 import org.opendaylight.yang.gen.v1.http.openconfig.net.yang.routing.policy.rev151009.routing.policy.top.routing.policy.DefinedSets;
  30 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.message.rev180329.path.attributes.attributes.Communities;
  31 import org.opendaylight.yang.gen.v1.urn.opendaylight.params.xml.ns.yang.bgp.message.rev180329.path.attributes.attributes.CommunitiesBuilder;
  32 import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
  33
  34 public class AbstractCommunityHandler {
  35     private static final InstanceIdentifier<CommunitySets> COMMUNITY_SETS_IID
  36             = InstanceIdentifier.create(RoutingPolicy.class).child(DefinedSets.class)
  37             .augmentation(DefinedSets1.class).child(BgpDefinedSets.class)
  38             .child(CommunitySets.class);
  39     private final DataBroker databroker;
  40     protected final LoadingCache<String, List<Communities>> communitySets = CacheBuilder.newBuilder()
  41             .build(new CacheLoader<String, List<Communities>>() {
  42                 @Override
  43                 public List<Communities> load(final String key) throws ExecutionException, InterruptedException {
  44                     return loadCommunitySet(key);
  45                 }
  46             });
  47
  48     public AbstractCommunityHandler(final DataBroker dataBroker) {
  49         this.databroker = requireNonNull(dataBroker);
  50     }
  51
  52     private List<Communities> loadCommunitySet(final String key) throws ExecutionException, InterruptedException {
  53         final ReadTransaction tr = this.databroker.newReadOnlyTransaction();
  54         final Optional<CommunitySet> result =
  55                 tr.read(LogicalDatastoreType.CONFIGURATION, COMMUNITY_SETS_IID
  56                         .child(CommunitySet.class, new CommunitySetKey(key))).get();
  57
  58
  59         if (!result.isPresent()) {
  60             return Collections.emptyList();
  61         }
  62
  63         return result.get().getCommunities()
  64                 .stream().map(ge -> new CommunitiesBuilder().setAsNumber(ge.getAsNumber())
  65                         .setSemantics(ge.getSemantics()).build()).collect(Collectors.toList());
  66     }
  67 }