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