X-Git-Url: https://juplo.de/gitweb/?a=blobdiff_plain;f=src%2Fmain%2Fjava%2Fde%2Fjuplo%2Fkafka%2FApplication.java;h=76c2520b393611d4166a3d96f762872f67da39d2;hb=e11c6152c721440d4a599a6f5fe0fe46f2283f31;hp=5226d6bd062bee4003ef4ca00f8f1c37597af3d8;hpb=5a2c467b5b299f975f22d6c0e761686067634adc;p=demos%2Fkafka%2Ftraining

diff --git a/src/main/java/de/juplo/kafka/Application.java b/src/main/java/de/juplo/kafka/Application.java
index 5226d6b..76c2520 100644
--- a/src/main/java/de/juplo/kafka/Application.java
+++ b/src/main/java/de/juplo/kafka/Application.java
@@ -1,52 +1,73 @@
 package de.juplo.kafka;
 
-import org.apache.kafka.clients.consumer.KafkaConsumer;
-import org.apache.kafka.common.serialization.LongDeserializer;
-import org.apache.kafka.common.serialization.StringDeserializer;
+import lombok.extern.slf4j.Slf4j;
+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.boot.context.properties.EnableConfigurationProperties;
-import org.springframework.context.annotation.Bean;
 
-import java.util.Properties;
-import java.util.concurrent.Executors;
+import javax.annotation.PreDestroy;
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.TimeUnit;
 
 
 @SpringBootApplication
-@EnableConfigurationProperties(ApplicationProperties.class)
-public class Application
+@Slf4j
+public class Application implements ApplicationRunner
 {
-  @Bean
-  public EndlessConsumer endlessConsumer(
-      KafkaConsumer<String, String> kafkaConsumer,
-      ApplicationProperties properties)
-  {
-    EndlessConsumer consumer =
-        new EndlessConsumer(
-            Executors.newFixedThreadPool(1),
-            properties.getClientId(),
-            properties.getTopic(),
-            kafkaConsumer);
+  @Autowired
+  EndlessConsumer endlessConsumer;
+  @Autowired
+  ExecutorService executor;
 
-    consumer.start();
 
-    return consumer;
+  @Override
+  public void run(ApplicationArguments args) throws Exception
+  {
+    log.info("Starting EndlessConsumer");
+    endlessConsumer.start();
   }
 
-  @Bean(destroyMethod = "close")
-  public KafkaConsumer<String, String> kafkaConsumer(ApplicationProperties properties)
+  @PreDestroy
+  public void shutdown()
   {
-    Properties props = new Properties();
-
-    props.put("bootstrap.servers", properties.getBootstrapServer());
-    props.put("group.id", properties.getGroupId());
-    props.put("client.id", properties.getClientId());
-    props.put("auto.offset.reset", properties.getAutoOffsetReset());
-    props.put("metadata.max.age.ms", "1000");
-    props.put("key.deserializer", StringDeserializer.class.getName());
-    props.put("value.deserializer", LongDeserializer.class.getName());
+    try
+    {
+      log.info("Stopping EndlessConsumer");
+      endlessConsumer.stop();
+    }
+    catch (IllegalStateException e)
+    {
+      log.info("Was already stopped: {}", e.toString());
+    }
+    catch (Exception e)
+    {
+      log.error("Unexpected exception while stopping EndlessConsumer: {}", e);
+    }
 
-    return new KafkaConsumer<>(props);
+    try
+    {
+      log.info("Shutting down the ExecutorService.");
+      executor.shutdown();
+      log.info("Waiting 5 seconds for the ExecutorService to terminate...");
+      executor.awaitTermination(5, TimeUnit.SECONDS);
+    }
+    catch (InterruptedException e)
+    {
+      log.error("Exception while waiting for the termination of the ExecutorService: {}", e);
+    }
+    finally
+    {
+      if (!executor.isTerminated())
+      {
+        log.warn("Forcing shutdown of ExecutorService!");
+        executor
+            .shutdownNow()
+            .forEach(runnable -> log.warn("Unprocessed task: {}", runnable.getClass().getSimpleName()));
+      }
+      log.info("Shutdow of ExecutorService finished");
+    }
   }