Spring-Boot Version des Simple-Consumer

[demos/kafka/training] / src / main / java / de / juplo / kafka / Application.java

diff --git a/src/main/java/de/juplo/kafka/Application.java b/src/main/java/de/juplo/kafka/Application.java
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+package de.juplo.kafka;
+
+import lombok.extern.slf4j.Slf4j;
+import org.apache.kafka.clients.consumer.Consumer;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.ApplicationArguments;
+import org.springframework.boot.ApplicationRunner;
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.scheduling.concurrent.ThreadPoolTaskExecutor;
+
+import javax.annotation.PreDestroy;
+import java.util.concurrent.ExecutionException;
+import java.util.concurrent.Future;
+
+
+@SpringBootApplication
+@Slf4j
+public class Application implements ApplicationRunner
+{
+  @Autowired
+  ThreadPoolTaskExecutor taskExecutor;
+  @Autowired
+  Consumer<?, ?> kafkaConsumer;
+  @Autowired
+  SimpleConsumer simpleConsumer;
+
+  Future<?> consumerJob;
+
+  @Override
+  public void run(ApplicationArguments args) throws Exception
+  {
+    log.info("Starting SimpleConsumer");
+    consumerJob = taskExecutor.submit(simpleConsumer);
+  }
+
+  @PreDestroy
+  public void shutdown() throws ExecutionException, InterruptedException
+  {
+    log.info("Signaling SimpleConsumer to quit its work");
+    kafkaConsumer.wakeup();
+    log.info("Waiting for SimpleConsumer to finish its work");
+    consumerJob.get();
+    log.info("SimpleConsumer finished its work");
+  }
+
+
+  public static void main(String[] args)
+  {
+    SpringApplication.run(Application.class, args);
+  }
+}