1 package de.juplo.kafka;
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;
11 import java.math.BigInteger;
17 @RequiredArgsConstructor
18 public class RestProducer
20 private final String id;
21 private final String topic;
22 private final Integer partition;
23 private final KafkaProducer<String, String> producer;
25 private long produced = 0;
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)
33 DeferredResult<ProduceResult> result = new DeferredResult<>();
35 final long time = System.currentTimeMillis();
37 final ProducerRecord<String, String> record = new ProducerRecord<>(
39 partition, // Partition
44 record.headers().add("source", id.getBytes());
45 if (correlationId != null)
47 record.headers().add("id", BigInteger.valueOf(correlationId).toByteArray());
50 producer.send(record, (metadata, e) ->
52 long now = System.currentTimeMillis();
57 result.setResult(new ProduceSuccess(metadata.partition(), metadata.offset()));
59 "{} - Sent key={} message={} partition={}/{} timestamp={} latency={}ms",
72 result.setErrorResult(new ProduceFailure(e));
74 "{} - ERROR key={} timestamp={} latency={}ms: {}",
77 metadata == null ? -1 : metadata.timestamp(),
84 long now = System.currentTimeMillis();
86 "{} - Queued message with key={} latency={}ms",
96 @ResponseStatus(HttpStatus.BAD_REQUEST)
97 public ErrorResponse illegalStateException(IllegalStateException e)
99 return new ErrorResponse(e.getMessage(), HttpStatus.BAD_REQUEST.value());