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 void writeChatRoomInfo(Flux<ChatRoomInfo> chatRoomInfoFlux)
  25   {
  26     chatRoomInfoFlux
  27         .map(ChatRoomTo::from)
  28         .flatMap(chatroomTo -> chatRoomRepository.save(chatroomTo));
  29   }
  30
  31   @Override
  32   public Flux<ChatRoomInfo> readChatRoomInfo()
  33   {
  34     return chatRoomRepository.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 void writeChatRoomData(
  44       UUID chatRoomId,
  45       Flux<Message> messageFlux,
  46       SuccessCallback successCallback,
  47       FailureCallback failureCallback)
  48   {
  49     messageFlux
  50         .map(message -> MessageTo.from(chatRoomId, message))
  51         .flatMap(messageTo -> messageRepository.save(messageTo))
  52         .doOnComplete(() -> successCallback.accept(chatRoomId))
  53         .doOnError(throwable -> failureCallback.accept(chatRoomId, throwable))
  54         .subscribe();
  55   }
  56
  57   @Override
  58   public Flux<Message> readChatRoomData(UUID chatRoomId)
  59   {
  60     return messageRepository.findByChatRoomIdOrderBySerialAsc(chatRoomId.toString())
  61         .map(messageTo -> messageTo.toMessage());
  62   }
  63 }