refactor: Pushed sharding one layer down in the architecture

[demos/kafka/chat] / src / main / java / de / juplo / kafka / chat / backend / domain / ShardedChatHome.java

diff --git a/src/main/java/de/juplo/kafka/chat/backend/domain/ShardedChatHome.java b/src/main/java/de/juplo/kafka/chat/backend/domain/ShardedChatHome.java
deleted file mode 100644 (file)
index 4b8c7f1..0000000
--- a/src/main/java/de/juplo/kafka/chat/backend/domain/ShardedChatHome.java
+++ /dev/null
@@ -1,59 +0,0 @@
-package de.juplo.kafka.chat.backend.domain;
-
-import lombok.extern.slf4j.Slf4j;
-import reactor.core.publisher.Flux;
-import reactor.core.publisher.Mono;
-
-import java.util.HashSet;
-import java.util.Set;
-import java.util.UUID;
-import java.util.stream.Collectors;
-
-
-@Slf4j
-public class ShardedChatHome implements ChatHome
-{
-  private final ChatHome[] chatHomes;
-  private final Set<Integer> ownedShards;
-  private final ShardingStrategy shardingStrategy;
-
-
-  public  ShardedChatHome(
-      ChatHome[] chatHomes,
-      ShardingStrategy shardingStrategy)
-  {
-    this.chatHomes = chatHomes;
-    this.shardingStrategy = shardingStrategy;
-    this.ownedShards = new HashSet<>();
-    for (int shard = 0; shard < chatHomes.length; shard++)
-      if(chatHomes[shard] != null)
-        this.ownedShards.add(shard);
-    log.info(
-        "Created ShardedChatHome for shards: {}",
-        ownedShards
-            .stream()
-            .map(String::valueOf)
-            .collect(Collectors.joining(", ")));
-  }
-
-
-  @Override
-  public Mono<ChatRoom> getChatRoom(UUID id)
-  {
-    return chatHomes[selectShard(id)].getChatRoom(id);
-  }
-
-  @Override
-  public Flux<ChatRoom> getChatRooms()
-  {
-    return Flux
-        .fromIterable(ownedShards)
-        .flatMap(shard -> chatHomes[shard].getChatRooms());
-  }
-
-
-  private int selectShard(UUID chatroomId)
-  {
-    return shardingStrategy.selectShard(chatroomId);
-  }
-}