juplo.de Git - demos/kafka/chat/blob - src/main/java/de/juplo/kafka/chat/backend/storage/mongodb/MongoDbStorageStrategy.java

   1 package de.juplo.kafka.chat.backend.storage.mongodb;
   2
   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.implementation.ShardingStrategy;
   6 import de.juplo.kafka.chat.backend.implementation.StorageStrategy;
   7 import lombok.RequiredArgsConstructor;
   8 import lombok.extern.slf4j.Slf4j;
   9 import reactor.core.publisher.Flux;
  10
  11 import java.util.UUID;
  12
  13
  14 @RequiredArgsConstructor
  15 @Slf4j
  16 public class MongoDbStorageStrategy implements StorageStrategy
  17 {
  18   private final ChatRoomRepository chatRoomRepository;
  19   private final MessageRepository messageRepository;
  20   private final ShardingStrategy shardingStrategy;
  21
  22
  23   @Override
  24   public Flux<ChatRoomInfo> writeChatRoomInfo(Flux<ChatRoomInfo> chatRoomInfoFlux)
  25   {
  26     return chatRoomInfoFlux
  27         .map(ChatRoomTo::from)
  28         .map(chatroomTo -> chatRoomRepository.save(chatroomTo))
  29         .map(ChatRoomTo::toChatRoomInfo);
  30   }
  31
  32   @Override
  33   public Flux<ChatRoomInfo> readChatRoomInfo()
  34   {
  35     return Flux
  36         .fromIterable(chatRoomRepository.findAll())
  37         .map(chatRoomTo ->
  38         {
  39           UUID chatRoomId = UUID.fromString(chatRoomTo.getId());
  40           return new ChatRoomInfo(chatRoomId, chatRoomTo.getName(), null);
  41         });
  42   }
  43
  44   @Override
  45   public Flux<Message> writeChatRoomData(UUID chatRoomId, Flux<Message> messageFlux)
  46   {
  47     return messageFlux
  48         .map(message -> MessageTo.from(chatRoomId, message))
  49         .map(messageTo -> messageRepository.save(messageTo))
  50         .map(MessageTo::toMessage);
  51   }
  52
  53   @Override
  54   public Flux<Message> readChatRoomData(UUID chatRoomId)
  55   {
  56     return Flux
  57         .fromIterable(messageRepository.findByChatRoomIdOrderBySerialAsc(chatRoomId.toString()))
  58         .map(messageTo -> messageTo.toMessage());
  59   }
  60 }