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.Set;
  16 import java.util.concurrent.ConcurrentHashMap;
  17 import java.util.concurrent.ConcurrentMap;
  18 import org.opendaylight.controller.cluster.access.concepts.MemberName;
  19 import org.opendaylight.controller.cluster.datastore.identifiers.ShardIdentifier;
  20 import org.opendaylight.controller.cluster.datastore.identifiers.ShardManagerIdentifier;
  21 import org.opendaylight.controller.cluster.raft.PeerAddressResolver;
  22
  23 /**
  24  * Implementation PeerAddressResolver that resolves address for shard peer ids. This class is owned by the
  25  * ShardMaanager and passed to Shard actors via the ConfigParams.
  26  *
  27  * @author Thomas Pantelis
  28  */
  29 class ShardPeerAddressResolver implements PeerAddressResolver {
  30     // Stores a mapping between a member name and the address of the member. The map is concurrent as it
  31     // will be accessed by multiple threads via the public resolve method.
  32     private final ConcurrentMap<MemberName, Address> memberNameToAddress = new ConcurrentHashMap<>();
  33     private final String shardManagerIdentifier;
  34     private final String shardManagerType;
  35     private final MemberName localMemberName;
  36
  37     ShardPeerAddressResolver(String shardManagerType, MemberName localMemberName) {
  38         this.shardManagerIdentifier = ShardManagerIdentifier.builder().type(shardManagerType).build().toString();
  39         this.shardManagerType = shardManagerType;
  40         this.localMemberName = Preconditions.checkNotNull(localMemberName);
  41     }
  42
  43     void addPeerAddress(MemberName memberName, Address address) {
  44         memberNameToAddress.put(memberName, address);
  45     }
  46
  47     void removePeerAddress(MemberName memberName) {
  48         memberNameToAddress.remove(memberName);
  49     }
  50
  51     Set<MemberName> getPeerMembers() {
  52         return this.memberNameToAddress.keySet();
  53     }
  54
  55     Address getPeerAddress(MemberName memberName) {
  56         return memberNameToAddress.get(memberName);
  57     }
  58
  59     Collection<String> getShardManagerPeerActorAddresses() {
  60         Collection<String> peerAddresses = new ArrayList<>();
  61         for (Map.Entry<MemberName, Address> entry: memberNameToAddress.entrySet()) {
  62             if (!localMemberName.equals(entry.getKey())) {
  63                 peerAddresses.add(getShardManagerActorPathBuilder(entry.getValue()).toString());
  64             }
  65         }
  66
  67         return peerAddresses;
  68     }
  69
  70     ShardIdentifier getShardIdentifier(MemberName memberName, String shardName) {
  71         return ShardIdentifier.create(shardName, memberName, shardManagerType);
  72     }
  73
  74     String getShardActorAddress(String shardName, MemberName memberName) {
  75         Address memberAddress = memberNameToAddress.get(memberName);
  76         if (memberAddress != null) {
  77             return getShardManagerActorPathBuilder(memberAddress).append("/").append(
  78                     getShardIdentifier(memberName, shardName)).toString();
  79         }
  80
  81         return null;
  82     }
  83
  84     StringBuilder getShardManagerActorPathBuilder(Address address) {
  85         return new StringBuilder().append(address.toString()).append("/user/").append(shardManagerIdentifier);
  86     }
  87
  88     @Override
  89     public String resolve(String peerId) {
  90         if (peerId == null) {
  91             return null;
  92         }
  93
  94         ShardIdentifier shardId = ShardIdentifier.fromShardIdString(peerId);
  95         return getShardActorAddress(shardId.getShardName(), shardId.getMemberName());
  96     }
  97 }