juplo.de Git - demos/kafka/demos-kafka-payment-system-transfer/blob - src/main/java/de/juplo/kafka/payment/transfer/TransferServiceApplication.java

   1 package de.juplo.kafka.payment.transfer;
   2
   3
   4 import com.fasterxml.jackson.databind.ObjectMapper;
   5 import de.juplo.kafka.payment.transfer.adapter.KafkaMessagingService;
   6 import de.juplo.kafka.payment.transfer.adapter.TransferConsumer;
   7 import de.juplo.kafka.payment.transfer.domain.TransferService;
   8 import de.juplo.kafka.payment.transfer.ports.MessagingService;
   9 import de.juplo.kafka.payment.transfer.ports.TransferRepository;
  10 import lombok.extern.slf4j.Slf4j;
  11 import org.apache.kafka.clients.consumer.ConsumerConfig;
  12 import org.apache.kafka.clients.consumer.KafkaConsumer;
  13 import org.apache.kafka.clients.producer.KafkaProducer;
  14 import org.apache.kafka.clients.producer.ProducerConfig;
  15 import org.apache.kafka.common.serialization.StringDeserializer;
  16 import org.apache.kafka.common.serialization.StringSerializer;
  17 import org.springframework.boot.SpringApplication;
  18 import org.springframework.boot.autoconfigure.SpringBootApplication;
  19 import org.springframework.boot.context.properties.EnableConfigurationProperties;
  20 import org.springframework.context.annotation.Bean;
  21
  22 import java.util.Properties;
  23 import java.util.concurrent.ExecutorService;
  24 import java.util.concurrent.Executors;
  25
  26
  27 @SpringBootApplication
  28 @EnableConfigurationProperties(TransferServiceProperties.class)
  29 @Slf4j
  30 public class TransferServiceApplication
  31 {
  32   @Bean(destroyMethod = "close")
  33   KafkaProducer<String, String> producer(TransferServiceProperties properties)
  34   {
  35     Properties props = new Properties();
  36     props.put(ProducerConfig.BOOTSTRAP_SERVERS_CONFIG, properties.bootstrapServers);
  37     props.put(ProducerConfig.KEY_SERIALIZER_CLASS_CONFIG, StringSerializer.class);
  38     props.put(ProducerConfig.VALUE_SERIALIZER_CLASS_CONFIG, StringSerializer.class);
  39
  40     return new KafkaProducer<>(props);
  41   }
  42
  43   @Bean
  44   KafkaConsumer<String, String> consumer(TransferServiceProperties properties)
  45   {
  46     Properties props = new Properties();
  47     props.put(ConsumerConfig.BOOTSTRAP_SERVERS_CONFIG, properties.bootstrapServers);
  48     props.put(ConsumerConfig.GROUP_ID_CONFIG, properties.groupId);
  49     props.put(ConsumerConfig.KEY_DESERIALIZER_CLASS_CONFIG, StringDeserializer.class);
  50     props.put(ConsumerConfig.VALUE_DESERIALIZER_CLASS_CONFIG, StringDeserializer.class);
  51
  52     return new KafkaConsumer<>(props);
  53   }
  54
  55   @Bean(destroyMethod = "shutdown")
  56   ExecutorService executorService()
  57   {
  58     return Executors.newFixedThreadPool(1);
  59   }
  60
  61   @Bean(destroyMethod = "shutdown")
  62   TransferConsumer transferConsumer(
  63       TransferServiceProperties properties,
  64       KafkaConsumer<String, String> consumer,
  65       ExecutorService executorService,
  66       ObjectMapper mapper,
  67       TransferService transferService)
  68   {
  69     TransferConsumer transferConsumer =
  70         new TransferConsumer(properties.topic, consumer, executorService, mapper, transferService);
  71     transferConsumer.start();
  72     return transferConsumer;
  73   }
  74
  75   @Bean
  76   MessagingService kafkaMessagingService(
  77       KafkaProducer<String, String> producer,
  78       ObjectMapper mapper,
  79       TransferServiceProperties properties)
  80   {
  81     return new KafkaMessagingService(producer, mapper, properties.topic);
  82   }
  83
  84   @Bean
  85   TransferService transferService(
  86       TransferRepository repository,
  87       MessagingService messagingService)
  88   {
  89     return new TransferService(repository, messagingService);
  90   }
  91
  92
  93   public static void main(String[] args)
  94   {
  95     SpringApplication.run(TransferServiceApplication.class, args);
  96   }
  97 }