X-Git-Url: https://juplo.de/gitweb/?a=blobdiff_plain;f=src%2Fmain%2Fjava%2Fde%2Fjuplo%2Fkafka%2FApplication.java;h=76c2520b393611d4166a3d96f762872f67da39d2;hb=2da45caa1f9d32e3a5506d71cce7f06fa2e36523;hp=7cfe268585f01d11326236e18cfc0b6dcc880176;hpb=32a052b7c494009c59190857984ef3563f4f2b14;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 7cfe268..76c2520 100644
--- a/src/main/java/de/juplo/kafka/Application.java
+++ b/src/main/java/de/juplo/kafka/Application.java
@@ -1,53 +1,73 @@
 package de.juplo.kafka;
 
+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 org.springframework.http.converter.json.Jackson2ObjectMapperBuilder;
-import org.springframework.util.Assert;
 
-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
 {
   @Autowired
-  ApplicationProperties properties;
+  EndlessConsumer endlessConsumer;
+  @Autowired
+  ExecutorService executor;
 
 
-  @Bean
-  public EndlessConsumer consumer()
+  @Override
+  public void run(ApplicationArguments args) throws Exception
   {
-    Assert.hasText(properties.getBootstrapServer(), "consumer.bootstrap-server must be set");
-    Assert.hasText(properties.getGroupId(), "consumer.group-id must be set");
-    Assert.hasText(properties.getClientId(), "consumer.client-id must be set");
-    Assert.hasText(properties.getTopic(), "consumer.topic must be set");
-
-    EndlessConsumer consumer =
-        new EndlessConsumer(
-            Executors.newFixedThreadPool(1),
-            properties.getBootstrapServer(),
-            properties.getGroupId(),
-            properties.getClientId(),
-            properties.getTopic(),
-            properties.getAutoOffsetReset());
-
-    consumer.start();
-
-    return consumer;
+    log.info("Starting EndlessConsumer");
+    endlessConsumer.start();
   }
 
-  @Bean
-  public Jackson2ObjectMapperBuilder jackson2ObjectMapperBuilder()
+  @PreDestroy
+  public void shutdown()
   {
-    return
-        new Jackson2ObjectMapperBuilder().serializers(
-            new TopicPartitionSerializer(),
-            new PartitionStatisticsSerializer());
+    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);
+    }
+
+    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");
+    }
   }