opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/sharding/ShardingServiceAddressResolver.java

   1 /*
   2  * Copyright (c) 2016 Cisco Systems, Inc. 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.controller.cluster.sharding;
   9
  10 import static com.google.common.base.Preconditions.checkNotNull;
  11 import static java.util.Objects.requireNonNull;
  12
  13 import akka.actor.Address;
  14 import java.util.Collection;
  15 import java.util.concurrent.ConcurrentHashMap;
  16 import java.util.concurrent.ConcurrentMap;
  17 import java.util.stream.Collectors;
  18 import org.opendaylight.controller.cluster.access.concepts.MemberName;
  19
  20 /**
  21  * Resolver for remote {@link ShardedDataTreeActor}'s.
  22  */
  23 public class ShardingServiceAddressResolver {
  24
  25     private final ConcurrentMap<MemberName, Address> memberNameToAddress = new ConcurrentHashMap<>();
  26     private final String shardingServiceActorIdentifier;
  27     private final MemberName localMemberName;
  28
  29     public ShardingServiceAddressResolver(final String shardingServiceActorIdentifier,
  30                                           final MemberName localMemberName) {
  31         this.shardingServiceActorIdentifier = shardingServiceActorIdentifier;
  32         this.localMemberName = localMemberName;
  33     }
  34
  35     void addPeerAddress(final MemberName memberName, final Address address) {
  36         memberNameToAddress.put(memberName, address);
  37     }
  38
  39     void removePeerAddress(final MemberName memberName) {
  40         memberNameToAddress.remove(memberName);
  41     }
  42
  43     Address getPeerAddress(final MemberName memberName) {
  44         return memberNameToAddress.get(memberName);
  45     }
  46
  47     StringBuilder getActorPathBuilder(final Address address) {
  48         return new StringBuilder().append(address.toString()).append("/user/").append(shardingServiceActorIdentifier);
  49     }
  50
  51     Collection<String> getShardingServicePeerActorAddresses() {
  52         final Collection<String> peerAddresses =
  53                 memberNameToAddress
  54                         .entrySet()
  55                         .stream()
  56                         .filter(entry -> !localMemberName.equals(entry.getKey()))
  57                         .map(entry -> getActorPathBuilder(entry.getValue()).toString())
  58                         .collect(Collectors.toList());
  59
  60         return peerAddresses;
  61     }
  62
  63     public String resolve(final MemberName memberName) {
  64         final Address address = memberNameToAddress.get(requireNonNull(memberName));
  65         checkNotNull(address, "Requested member[%s] is not present in the resolver", memberName);
  66         return getActorPathBuilder(address).toString();
  67     }
  68 }