X-Git-Url: https://juplo.de/gitweb/?a=blobdiff_plain;f=src%2Fmain%2Fjava%2Fde%2Fjuplo%2Fkafka%2Fchat%2Fbackend%2Fimplementation%2Finmemory%2FShardedChatHomeService.java;h=ab7f8d43ecf5e8d1635c50547ebce4ab29f5e5b2;hb=f70bb25f9b0769068028348995a78ece2130cd35;hp=06c197bf65f2a2cb423f96ca82e7756a43169c3f;hpb=33f1841f44878ce6a4896802d995d10a6aeef6d4;p=demos%2Fkafka%2Fchat

diff --git a/src/main/java/de/juplo/kafka/chat/backend/implementation/inmemory/ShardedChatHomeService.java b/src/main/java/de/juplo/kafka/chat/backend/implementation/inmemory/ShardedChatHomeService.java
index 06c197bf..ab7f8d43 100644
--- a/src/main/java/de/juplo/kafka/chat/backend/implementation/inmemory/ShardedChatHomeService.java
+++ b/src/main/java/de/juplo/kafka/chat/backend/implementation/inmemory/ShardedChatHomeService.java
@@ -8,6 +8,8 @@ import lombok.extern.slf4j.Slf4j;
 import reactor.core.publisher.Flux;
 import reactor.core.publisher.Mono;
 
+import java.net.URI;
+import java.util.Arrays;
 import java.util.HashSet;
 import java.util.Set;
 import java.util.UUID;
@@ -17,16 +19,25 @@ import java.util.stream.Collectors;
 @Slf4j
 public class ShardedChatHomeService implements ChatHomeService
 {
+  private final String instanceId;
   private final SimpleChatHomeService[] chatHomes;
   private final Set<Integer> ownedShards;
+  private final String[] shardOwners;
   private final ShardingStrategy shardingStrategy;
 
 
   public ShardedChatHomeService(
+      String instanceId,
       SimpleChatHomeService[] chatHomes,
+      URI[] shardOwners,
       ShardingStrategy shardingStrategy)
   {
+    this.instanceId = instanceId;
     this.chatHomes = chatHomes;
+    this.shardOwners = Arrays
+        .stream(shardOwners)
+        .map(uri -> uri.toASCIIString())
+        .toArray(size -> new String[size]);
     this.shardingStrategy = shardingStrategy;
     this.ownedShards = new HashSet<>();
     for (int shard = 0; shard < chatHomes.length; shard++)
@@ -46,7 +57,7 @@ public class ShardedChatHomeService implements ChatHomeService
   {
     int shard = shardingStrategy.selectShard(id);
     return chatHomes[shard] == null
-        ? Mono.error(new ShardNotOwnedException(shard))
+        ? Mono.error(new ShardNotOwnedException(instanceId, shard))
         : chatHomes[shard].createChatRoom(id, name);
   }
 
@@ -55,7 +66,7 @@ public class ShardedChatHomeService implements ChatHomeService
   {
     int shard = selectShard(id);
     return chatHomes[shard] == null
-        ? Mono.error(new ShardNotOwnedException(shard))
+        ? Mono.error(new ShardNotOwnedException(instanceId, shard))
         : chatHomes[shard]
             .getChatRoomInfo(id)
             .onErrorMap(throwable -> throwable instanceof UnknownChatroomException
@@ -79,7 +90,7 @@ public class ShardedChatHomeService implements ChatHomeService
   {
     int shard = selectShard(id);
     return chatHomes[shard] == null
-        ? Mono.error(new ShardNotOwnedException(shard))
+        ? Mono.error(new ShardNotOwnedException(instanceId, shard))
         : chatHomes[shard]
             .getChatRoomData(id)
             .onErrorMap(throwable -> throwable instanceof UnknownChatroomException
@@ -90,6 +101,12 @@ public class ShardedChatHomeService implements ChatHomeService
                 : throwable);
   }
 
+  @Override
+  public Mono<String[]> getShardOwners()
+  {
+    return Mono.just(shardOwners);
+  }
+
   private int selectShard(UUID chatroomId)
   {
     return shardingStrategy.selectShard(chatroomId);