opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/datastore/shardmanager/ShardPeerAddressResolver.java

   1 /*
   2  * Copyright (c) 2015 Brocade Communications 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.datastore.shardmanager;
   9
  10 import akka.actor.Address;
  11 import com.google.common.base.Preconditions;
  12 import java.util.ArrayList;
  13 import java.util.Collection;
  14 import java.util.Map;
  15 import java.util.concurrent.ConcurrentHashMap;
  16 import java.util.concurrent.ConcurrentMap;
  17 import org.opendaylight.controller.cluster.access.concepts.MemberName;
  18 import org.opendaylight.controller.cluster.datastore.identifiers.ShardIdentifier;
  19 import org.opendaylight.controller.cluster.datastore.identifiers.ShardManagerIdentifier;
  20 import org.opendaylight.controller.cluster.raft.PeerAddressResolver;
  21
  22 /**
  23  * Implementation PeerAddressResolver that resolves address for shard peer ids. This class is owned by the
  24  * ShardMaanager and passed to Shard actors via the ConfigParams.
  25  *
  26  * @author Thomas Pantelis
  27  */
  28 class ShardPeerAddressResolver implements PeerAddressResolver {
  29     // Stores a mapping between a member name and the address of the member. The map is concurrent as it
  30     // will be accessed by multiple threads via the public resolve method.
  31     private final ConcurrentMap<MemberName, Address> memberNameToAddress = new ConcurrentHashMap<>();
  32     private final String shardManagerIdentifier;
  33     private final String shardManagerType;
  34     private final MemberName localMemberName;
  35
  36     ShardPeerAddressResolver(String shardManagerType, MemberName localMemberName) {
  37         this.shardManagerIdentifier = ShardManagerIdentifier.builder().type(shardManagerType).build().toString();
  38         this.shardManagerType = shardManagerType;
  39         this.localMemberName = Preconditions.checkNotNull(localMemberName);
  40     }
  41
  42     void addPeerAddress(MemberName memberName, Address address) {
  43         memberNameToAddress.put(memberName, address);
  44     }
  45
  46     void removePeerAddress(MemberName memberName) {
  47         memberNameToAddress.remove(memberName);
  48     }
  49
  50     Address getPeerAddress(MemberName memberName) {
  51         return memberNameToAddress.get(memberName);
  52     }
  53
  54     Collection<String> getShardManagerPeerActorAddresses() {
  55         Collection<String> peerAddresses = new ArrayList<>();
  56         for (Map.Entry<MemberName, Address> entry: memberNameToAddress.entrySet()) {
  57             if (!localMemberName.equals(entry.getKey())) {
  58                 peerAddresses.add(getShardManagerActorPathBuilder(entry.getValue()).toString());
  59             }
  60         }
  61
  62         return peerAddresses;
  63     }
  64
  65     ShardIdentifier getShardIdentifier(MemberName memberName, String shardName) {
  66         return ShardIdentifier.create(shardName, memberName, shardManagerType);
  67     }
  68
  69     String getShardActorAddress(String shardName, MemberName memberName) {
  70         Address memberAddress = memberNameToAddress.get(memberName);
  71         if (memberAddress != null) {
  72             return getShardManagerActorPathBuilder(memberAddress).append("/").append(
  73                     getShardIdentifier(memberName, shardName)).toString();
  74         }
  75
  76         return null;
  77     }
  78
  79     StringBuilder getShardManagerActorPathBuilder(Address address) {
  80         return new StringBuilder().append(address.toString()).append("/user/").append(shardManagerIdentifier);
  81     }
  82
  83     @Override
  84     public String resolve(String peerId) {
  85         if (peerId == null) {
  86             return null;
  87         }
  88
  89         ShardIdentifier shardId = ShardIdentifier.fromShardIdString(peerId);
  90         return getShardActorAddress(shardId.getShardName(), shardId.getMemberName());
  91     }
  92 }