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

   1 package de.juplo.kafka.chat.backend.persistence.storage.mongodb;
   2
   3 import de.juplo.kafka.chat.backend.domain.ChatRoom;
   4 import de.juplo.kafka.chat.backend.persistence.StorageStrategy;
   5 import de.juplo.kafka.chat.backend.persistence.storage.files.ChatRoomServiceFactory;
   6 import lombok.RequiredArgsConstructor;
   7 import lombok.extern.slf4j.Slf4j;
   8 import reactor.core.publisher.Flux;
   9
  10 import java.time.Clock;
  11 import java.util.UUID;
  12
  13
  14 @RequiredArgsConstructor
  15 @Slf4j
  16 public class MongoDbStorageStrategy implements StorageStrategy
  17 {
  18   private final ChatRoomRepository repository;
  19   private final Clock clock;
  20   private final int bufferSize;
  21   private final ChatRoomServiceFactory factory;
  22
  23
  24   @Override
  25   public void write(Flux<ChatRoom> chatroomFlux)
  26   {
  27     chatroomFlux
  28         .map(ChatRoomTo::from)
  29         .subscribe(chatroomTo -> repository.save(chatroomTo));
  30   }
  31
  32   @Override
  33   public Flux<ChatRoom> read()
  34   {
  35     return Flux
  36         .fromIterable(repository.findAll())
  37         .map(chatRoomTo ->
  38         {
  39           UUID chatRoomId = UUID.fromString(chatRoomTo.getId());
  40           return new ChatRoom(
  41               chatRoomId,
  42               chatRoomTo.getName(),
  43               clock,
  44               factory.create(
  45                   Flux
  46                       .fromIterable(chatRoomTo.getMessages())
  47                       .map(messageTo -> messageTo.toMessage())),
  48               bufferSize);
  49         });
  50   }
  51 }