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
   9 package org.opendaylight.controller.cluster.sharding;
  10
  11 import akka.actor.Address;
  12 import com.google.common.base.Preconditions;
  13 import java.util.Collection;
  14 import java.util.concurrent.ConcurrentHashMap;
  15 import java.util.concurrent.ConcurrentMap;
  16 import java.util.stream.Collectors;
  17 import org.opendaylight.controller.cluster.access.concepts.MemberName;
  18
  19 /**
  20  * Resolver for remote {@link ShardedDataTreeActor}'s.
  21  */
  22 public class ShardingServiceAddressResolver {
  23
  24     private final ConcurrentMap<MemberName, Address> memberNameToAddress = new ConcurrentHashMap<>();
  25     private final String shardingServiceActorIdentifier;
  26     private final MemberName localMemberName;
  27
  28     public ShardingServiceAddressResolver(final String shardingServiceActorIdentifier,
  29                                           final MemberName localMemberName) {
  30         this.shardingServiceActorIdentifier = shardingServiceActorIdentifier;
  31         this.localMemberName = localMemberName;
  32     }
  33
  34     void addPeerAddress(final MemberName memberName, final Address address) {
  35         memberNameToAddress.put(memberName, address);
  36     }
  37
  38     void removePeerAddress(final MemberName memberName) {
  39         memberNameToAddress.remove(memberName);
  40     }
  41
  42     Address getPeerAddress(final MemberName memberName) {
  43         return memberNameToAddress.get(memberName);
  44     }
  45
  46     StringBuilder getActorPathBuilder(final Address address) {
  47         return new StringBuilder().append(address.toString()).append("/user/").append(shardingServiceActorIdentifier);
  48     }
  49
  50     Collection<String> getShardingServicePeerActorAddresses() {
  51         final Collection<String> peerAddresses =
  52                 memberNameToAddress
  53                         .entrySet()
  54                         .stream()
  55                         .filter(entry -> !localMemberName.equals(entry.getKey()))
  56                         .map(entry -> getActorPathBuilder(entry.getValue()).toString())
  57                         .collect(Collectors.toList());
  58
  59         return peerAddresses;
  60     }
  61
  62     public String resolve(final MemberName memberName) {
  63         Preconditions.checkNotNull(memberName);
  64         final Address address = memberNameToAddress.get(memberName);
  65         Preconditions.checkNotNull(address, "Requested member[%s] is not present in the resolver ",
  66                 memberName.toString());
  67
  68         return getActorPathBuilder(address).toString();
  69     }
  70 }