Merge der überarbeiteten Compose-Konfiguration (Branch 'customized')

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

diff --git a/src/main/java/de/juplo/kafka/RestProducer.java b/src/main/java/de/juplo/kafka/RestProducer.java
index dea49f0..b430e35 100644 (file)
--- a/src/main/java/de/juplo/kafka/RestProducer.java
+++ b/src/main/java/de/juplo/kafka/RestProducer.java
@@ -4,14 +4,14 @@ import lombok.extern.slf4j.Slf4j;
 import org.apache.kafka.clients.producer.KafkaProducer;
 import org.apache.kafka.clients.producer.ProducerRecord;
 import org.apache.kafka.common.serialization.StringSerializer;
-import org.springframework.http.MediaType;
+import org.springframework.http.HttpStatus;
 import org.springframework.web.bind.annotation.*;
 import org.springframework.web.context.request.async.DeferredResult;
 
 import javax.annotation.PreDestroy;
+import java.math.BigInteger;
 import java.util.Properties;
 import java.util.concurrent.ExecutionException;
-import java.util.concurrent.ExecutorService;
 
 
 @Slf4j
@@ -20,6 +20,7 @@ public class RestProducer
 {
   private final String id;
   private final String topic;
+  private final Integer partition;
   private final KafkaProducer<String, String> producer;
 
   private long produced = 0;
@@ -28,6 +29,7 @@ public class RestProducer
   {
     this.id = properties.getClientId();
     this.topic = properties.getTopic();
+    this.partition = properties.getPartition();
 
     Properties props = new Properties();
     props.put("bootstrap.servers", properties.getBootstrapServer());
@@ -47,6 +49,7 @@ public class RestProducer
   @PostMapping(path = "{key}")
   public DeferredResult<ProduceResult> send(
       @PathVariable String key,
+      @RequestHeader(name = "X-id", required = false) Long correlationId,
       @RequestBody String value)
   {
     DeferredResult<ProduceResult> result = new DeferredResult<>();
@@ -55,10 +58,17 @@ public class RestProducer
 
     final ProducerRecord<String, String> record = new ProducerRecord<>(
         topic,  // Topic
+        partition, // Partition
         key,    // Key
         value   // Value
     );
 
+    record.headers().add("source", id.getBytes());
+    if (correlationId != null)
+    {
+      record.headers().add("id", BigInteger.valueOf(correlationId).toByteArray());
+    }
+
     producer.send(record, (metadata, e) ->
     {
       long now = System.currentTimeMillis();
@@ -95,9 +105,8 @@ public class RestProducer
 
     long now = System.currentTimeMillis();
     log.trace(
-        "{} - Queued #{} key={} latency={}ms",
+        "{} - Queued message with key={} latency={}ms",
         id,
-        value,
         record.key(),
         now - time
     );
@@ -105,6 +114,13 @@ public class RestProducer
     return result;
   }
 
+  @ExceptionHandler
+  @ResponseStatus(HttpStatus.BAD_REQUEST)
+  public ErrorResponse illegalStateException(IllegalStateException e)
+  {
+    return new ErrorResponse(e.getMessage(), HttpStatus.BAD_REQUEST.value());
+  }
+
   @PreDestroy
   public void destroy() throws ExecutionException, InterruptedException
   {