Simplified the thread-execution

[demos/kafka/demos-kafka-payment-system-transfer] / src / main / java / de / juplo / kafka / payment / transfer / TransferServiceApplication.java

diff --git a/src/main/java/de/juplo/kafka/payment/transfer/TransferServiceApplication.java b/src/main/java/de/juplo/kafka/payment/transfer/TransferServiceApplication.java
index 65f683c..eab6abf 100644 (file)
--- a/src/main/java/de/juplo/kafka/payment/transfer/TransferServiceApplication.java
+++ b/src/main/java/de/juplo/kafka/payment/transfer/TransferServiceApplication.java
@@ -3,18 +3,25 @@ package de.juplo.kafka.payment.transfer;
 
 import com.fasterxml.jackson.databind.ObjectMapper;
 import de.juplo.kafka.payment.transfer.adapter.KafkaMessagingService;
-import de.juplo.kafka.payment.transfer.domain.TransferService;
-import de.juplo.kafka.payment.transfer.ports.MessagingService;
+import de.juplo.kafka.payment.transfer.adapter.NoOpMessageService;
+import de.juplo.kafka.payment.transfer.adapter.TransferConsumer;
+import de.juplo.kafka.payment.transfer.adapter.TransferController;
+import de.juplo.kafka.payment.transfer.domain.Transfer;
 import de.juplo.kafka.payment.transfer.ports.TransferRepository;
+import de.juplo.kafka.payment.transfer.ports.TransferService;
 import lombok.extern.slf4j.Slf4j;
+import org.apache.kafka.clients.consumer.ConsumerConfig;
+import org.apache.kafka.clients.consumer.KafkaConsumer;
 import org.apache.kafka.clients.producer.KafkaProducer;
 import org.apache.kafka.clients.producer.ProducerConfig;
+import org.apache.kafka.common.serialization.StringDeserializer;
 import org.apache.kafka.common.serialization.StringSerializer;
 import org.springframework.boot.SpringApplication;
 import org.springframework.boot.autoconfigure.SpringBootApplication;
 import org.springframework.boot.context.properties.EnableConfigurationProperties;
 import org.springframework.context.annotation.Bean;
 
+import java.util.Optional;
 import java.util.Properties;
 
 
@@ -35,7 +42,74 @@ public class TransferServiceApplication
   }
 
   @Bean
-  MessagingService kafkaMessagingService(
+  KafkaConsumer<String, String> consumer(TransferServiceProperties properties)
+  {
+    Properties props = new Properties();
+    props.put(ConsumerConfig.BOOTSTRAP_SERVERS_CONFIG, properties.bootstrapServers);
+    props.put(ConsumerConfig.GROUP_ID_CONFIG, properties.groupId);
+    props.put(ConsumerConfig.AUTO_OFFSET_RESET_CONFIG, "earliest");
+    props.put(ConsumerConfig.ENABLE_AUTO_COMMIT_CONFIG, false);
+    props.put(ConsumerConfig.KEY_DESERIALIZER_CLASS_CONFIG, StringDeserializer.class);
+    props.put(ConsumerConfig.VALUE_DESERIALIZER_CLASS_CONFIG, StringDeserializer.class);
+
+    return new KafkaConsumer<>(props);
+  }
+
+  @Bean(destroyMethod = "shutdown")
+  TransferConsumer transferConsumer(
+      TransferServiceProperties properties,
+      KafkaConsumer<String, String> consumer,
+      ObjectMapper mapper,
+      TransferService productionTransferService,
+      TransferService restoreTransferService)
+  {
+    return
+        new TransferConsumer(
+            properties.topic,
+            consumer,
+            mapper,
+            new TransferConsumer.ConsumerUseCases() {
+              @Override
+              public void create(Long id, Long payer, Long payee, Integer amount)
+              {
+                productionTransferService.create(id, payer, payee, amount);
+              }
+
+              @Override
+              public Optional<Transfer> get(Long id)
+              {
+                return productionTransferService.get(id);
+              }
+
+              @Override
+              public void handleStateChange(Long id, Transfer.State state)
+              {
+                productionTransferService.handleStateChange(id, state);
+              }
+            },
+            new TransferConsumer.ConsumerUseCases() {
+              @Override
+              public void create(Long id, Long payer, Long payee, Integer amount)
+              {
+                restoreTransferService.create(id, payer, payee, amount);
+              }
+
+              @Override
+              public Optional<Transfer> get(Long id)
+              {
+                return restoreTransferService.get(id);
+              }
+
+              @Override
+              public void handleStateChange(Long id, Transfer.State state)
+              {
+                restoreTransferService.handleStateChange(id, state);
+              }
+            });
+  }
+
+  @Bean
+  KafkaMessagingService kafkaMessagingService(
       KafkaProducer<String, String> producer,
       ObjectMapper mapper,
       TransferServiceProperties properties)
@@ -44,11 +118,27 @@ public class TransferServiceApplication
   }
 
   @Bean
-  TransferService transferService(
+  TransferService productionTransferService(
       TransferRepository repository,
-      MessagingService messagingService)
+      KafkaMessagingService kafkaMessagingService)
+  {
+    return new TransferService(repository, kafkaMessagingService);
+  }
+
+  @Bean
+  TransferService restoreTransferService(
+      TransferRepository repository,
+      NoOpMessageService noOpMessageService)
+  {
+    return new TransferService(repository, noOpMessageService);
+  }
+
+  @Bean
+  TransferController transferController(
+      TransferService productionTransferService,
+      KafkaMessagingService kafkaMessagingService)
   {
-    return new TransferService(repository, messagingService);
+    return new TransferController(productionTransferService, kafkaMessagingService);
   }