1 package de.juplo.kafka.chat.backend.persistence.storage.mongodb;
3 import de.juplo.kafka.chat.backend.domain.ChatRoomInfo;
4 import de.juplo.kafka.chat.backend.domain.Message;
5 import de.juplo.kafka.chat.backend.persistence.ShardingStrategy;
6 import de.juplo.kafka.chat.backend.persistence.StorageStrategy;
7 import lombok.RequiredArgsConstructor;
8 import lombok.extern.slf4j.Slf4j;
9 import reactor.core.publisher.Flux;
11 import java.util.UUID;
14 @RequiredArgsConstructor
16 public class MongoDbStorageStrategy implements StorageStrategy
18 private final ChatRoomRepository chatRoomRepository;
19 private final MessageRepository messageRepository;
20 private final ShardingStrategy shardingStrategy;
24 public void writeChatRoomInfo(Flux<ChatRoomInfo> chatRoomInfoFlux)
27 .map(ChatRoomTo::from)
28 .subscribe(chatroomTo -> chatRoomRepository.save(chatroomTo));
32 public Flux<ChatRoomInfo> readChatRoomInfo()
35 .fromIterable(chatRoomRepository.findAll())
38 UUID chatRoomId = UUID.fromString(chatRoomTo.getId());
39 int shard = shardingStrategy.selectShard(chatRoomId);
42 "{} - old shard: {}, new shard: {}",
44 chatRoomTo.getShard(),
47 return new ChatRoomInfo(
55 public void writeChatRoomData(UUID chatRoomId, Flux<Message> messageFlux)
58 .map(message -> MessageTo.from(chatRoomId, message))
59 .subscribe(messageTo -> messageRepository.save(messageTo));
63 public Flux<Message> readChatRoomData(UUID chatRoomId)
66 .fromIterable(messageRepository.findByChatRoomIdOrderBySerialAsc(chatRoomId.toString()))
67 .map(messageTo -> messageTo.toMessage());