juplo.de Git - demos/kafka/training/blob - src/main/java/de/juplo/kafka/RestProducer.java

   1 package de.juplo.kafka;
   2
   3 import lombok.RequiredArgsConstructor;
   4 import lombok.extern.slf4j.Slf4j;
   5 import org.apache.kafka.clients.producer.KafkaProducer;
   6 import org.apache.kafka.clients.producer.ProducerRecord;
   7 import org.springframework.http.HttpStatus;
   8 import org.springframework.web.bind.annotation.*;
   9 import org.springframework.web.context.request.async.DeferredResult;
  10
  11 import java.math.BigInteger;
  12
  13
  14 @Slf4j
  15 @RequestMapping
  16 @ResponseBody
  17 @RequiredArgsConstructor
  18 public class RestProducer
  19 {
  20   private final String id;
  21   private final String topic;
  22   private final Integer partition;
  23   private final KafkaProducer<String, String> producer;
  24
  25   private long produced = 0;
  26
  27   @PostMapping(path = "{key}")
  28   public DeferredResult<ProduceResult> send(
  29       @PathVariable String key,
  30       @RequestHeader(name = "X-id", required = false) Long correlationId,
  31       @RequestBody String value)
  32   {
  33     DeferredResult<ProduceResult> result = new DeferredResult<>();
  34
  35     final long time = System.currentTimeMillis();
  36
  37     final ProducerRecord<String, String> record = new ProducerRecord<>(
  38         topic,  // Topic
  39         key,    // Key
  40         value   // Value
  41     );
  42
  43     // TODO: Nachricht versenden und Feedback geben
  44     // Tipp:
  45     // result.setResult(new ProduceSuccess(metadata.partition(), metadata.offset()));
  46     // result.setErrorResult(new ProduceFailure(e));
  47
  48     return result;
  49   }
  50
  51   @ExceptionHandler
  52   @ResponseStatus(HttpStatus.BAD_REQUEST)
  53   public ErrorResponse illegalStateException(IllegalStateException e)
  54   {
  55     return new ErrorResponse(e.getMessage(), HttpStatus.BAD_REQUEST.value());
  56   }
  57 }