1 package de.juplo.kafka.chat.backend.persistence.inmemory;
3 import de.juplo.kafka.chat.backend.domain.ChatRoom;
4 import lombok.extern.slf4j.Slf4j;
5 import reactor.core.publisher.Flux;
6 import reactor.core.publisher.Mono;
12 public class InMemoryChatHomeService
14 private final Map<UUID, ChatRoom>[] chatrooms;
17 public InMemoryChatHomeService(
20 Flux<ChatRoom> chatroomFlux)
22 log.debug("Creating InMemoryChatHomeService");
23 this.chatrooms = new Map[numShards];
24 Set<Integer> owned = Arrays
27 () -> new HashSet<>(),
28 (set, i) -> set.add(i),
29 (a, b) -> a.addAll(b));
30 for (int shard = 0; shard < numShards; shard++)
32 chatrooms[shard] = owned.contains(shard)
39 if (owned.contains(chatRoom.getShard()))
45 log.info("Ignoring not owned chat-room {}", chatRoom);
50 .forEach(chatroom -> chatrooms[chatroom.getShard()].put(chatroom.getId(), chatroom));
53 public void putChatRoom(ChatRoom chatRoom)
55 chatrooms[chatRoom.getShard()].put(chatRoom.getId(), chatRoom);
58 public Mono<ChatRoom> getChatRoom(int shard, UUID id)
60 return Mono.justOrEmpty(chatrooms[shard].get(id));
63 public Flux<ChatRoom> getChatRooms(int shard)
65 return Flux.fromStream(chatrooms[shard].values().stream());