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[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
index dda9b11..b304fa9 100644 (file)
--- a/src/main/java/de/juplo/kafka/Application.java
+++ b/src/main/java/de/juplo/kafka/Application.java
@@ -10,77 +10,35 @@ import org.springframework.kafka.core.KafkaTemplate;
 import org.springframework.kafka.support.SendResult;
 import org.springframework.util.concurrent.ListenableFuture;
 
-import java.util.List;
-
 
 @Slf4j
 @SpringBootApplication
 public class Application implements ApplicationRunner
 {
-  public final static String ARG_NUM = "num";
-
   @Autowired
   KafkaTemplate<String, String> kafkaTemplate;
 
-
-  void send(String key, String value)
-  {
-    ListenableFuture<SendResult<String, String>> listenableFuture =
-        kafkaTemplate.sendDefault(key, value);
-
-    listenableFuture.addCallback(
-        result -> log.debug(
-            "Sent {}={} to partition={}, offset={}",
-            result.getProducerRecord().key(),
-            result.getProducerRecord().value(),
-            result.getRecordMetadata().partition(),
-            result.getRecordMetadata().offset()),
-        e -> log.error("ERROR sendig message", e));
-  }
-
   @Override
   public void run(ApplicationArguments args)
   {
-    int num = 10;
-
-    if (args.containsOption(ARG_NUM))
-    {
-      List<String> numArgs = args.getOptionValues(ARG_NUM);
-      if (numArgs.size() > 1)
-      {
-        log.error(
-            "Only one occurence of argument {} is allowed, but found: {}",
-            ARG_NUM,
-            numArgs.size());
-        return;
-      }
-
-      try
-      {
-        num = Integer.parseInt(numArgs.get(0));
-      }
-      catch (NumberFormatException e)
-      {
-        log.error("{} is not a number: {}", numArgs.get(0), e.getMessage());
-      }
-    }
-
-    for (int i = 0; i < num; i++)
+    for (int i = 0; i < 100; i++)
     {
-      send(Long.toString(i%10), Long.toString(i));
-      try
-      {
-        Thread.sleep(500);
-      }
-      catch (InterruptedException e)
-      {
-        log.info("Interrupted after sending {} messages", i);
-        return;
-      }
+      // tag::callback[]
+      ListenableFuture<SendResult<String, String>> listenableFuture =
+          kafkaTemplate.send("test", Long.toString(i%10), Long.toString(i));
+
+      listenableFuture.addCallback(
+          result -> log.info(
+              "Sent {}={} to partition={}, offset={}",
+              result.getProducerRecord().key(),
+              result.getProducerRecord().value(),
+              result.getRecordMetadata().partition(),
+              result.getRecordMetadata().offset()),
+          e -> log.error("ERROR sendig message", e));
+      // end::callback[]
     }
   }
 
-
   public static void main(String[] args)
   {
     SpringApplication.run(Application.class, args);