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

   1 package de.juplo.kafka.chat.backend;
   2
   3 import de.juplo.kafka.chat.backend.domain.ChatHome;
   4 import de.juplo.kafka.chat.backend.domain.ChatHomeFactory;
   5 import de.juplo.kafka.chat.backend.domain.ChatHomeService;
   6 import de.juplo.kafka.chat.backend.persistence.StorageStrategy;
   7 import org.springframework.boot.context.properties.EnableConfigurationProperties;
   8 import org.springframework.context.annotation.Bean;
   9 import org.springframework.context.annotation.Configuration;
  10
  11 import java.time.Clock;
  12
  13
  14 @Configuration
  15 @EnableConfigurationProperties(ChatBackendProperties.class)
  16 public class ChatBackendConfiguration
  17 {
  18   @Bean
  19   ChatHome[] chatHomes(
  20       ChatHomeFactory factory,
  21       ChatBackendProperties properties,
  22       StorageStrategy storageStrategy)
  23   {
  24     ChatHome[] chatHomes = new ChatHome[properties.getInmemory().getNumShards()];
  25     storageStrategy
  26         .read()
  27         .subscribe(chatRoom ->
  28         {
  29           int shard = chatRoom.getShard();
  30           if (chatHomes[shard] == null)
  31             chatHomes[shard] = factory.createChatHome(shard);
  32         });
  33     return chatHomes;
  34   }
  35
  36   @Bean
  37   Clock clock()
  38   {
  39     return Clock.systemDefaultZone();
  40   }
  41 }