juplo.de Git - demos/kafka/chat/blob - src/main/java/de/juplo/kafka/chat/backend/persistence/kafka/KafkaChatHome.java

   1 package de.juplo.kafka.chat.backend.persistence.kafka;
   2
   3 import de.juplo.kafka.chat.backend.domain.ChatHome;
   4 import de.juplo.kafka.chat.backend.domain.ChatRoom;
   5 import de.juplo.kafka.chat.backend.domain.ShardNotOwnedException;
   6 import de.juplo.kafka.chat.backend.domain.ShardingStrategy;
   7 import lombok.RequiredArgsConstructor;
   8 import lombok.extern.slf4j.Slf4j;
   9 import reactor.core.publisher.Flux;
  10 import reactor.core.publisher.Mono;
  11
  12 import java.util.*;
  13
  14
  15 @RequiredArgsConstructor
  16 @Slf4j
  17 public class KafkaChatHome implements ChatHome
  18 {
  19   private final ShardingStrategy shardingStrategy;
  20   private final ChatMessageChannel chatMessageChanel;
  21
  22
  23   @Override
  24   public Mono<ChatRoom> getChatRoom(UUID id)
  25   {
  26     int shard = shardingStrategy.selectShard(id);
  27     if (chatMessageChanel.isLoadInProgress())
  28     {
  29       throw new LoadInProgressException(shard);
  30     }
  31     else
  32     {
  33       return chatMessageChanel.getChatRoom(shard, id);
  34     }
  35   }
  36
  37   @Override
  38   public Flux<ChatRoom> getChatRooms()
  39   {
  40     if (chatMessageChanel.isLoadInProgress())
  41     {
  42       throw new LoadInProgressException();
  43     }
  44     else
  45     {
  46       return chatMessageChanel.getChatRooms();
  47     }
  48   }
  49 }