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;
15 @RequiredArgsConstructor
16 public class RestGateway
18 private final String id;
19 private final String topic;
20 private final KafkaProducer<String, Integer> producer;
22 private long produced = 0;
24 @PostMapping(path = "{key}")
25 public DeferredResult<ProduceResult> send(
26 @PathVariable String key,
27 @RequestHeader(name = "X-id", required = false) Long correlationId,
28 @RequestBody Integer value)
30 DeferredResult<ProduceResult> result = new DeferredResult<>();
32 final long time = System.currentTimeMillis();
34 final ProducerRecord<String, Integer> record = new ProducerRecord<>(
40 producer.send(record, (metadata, e) ->
42 long now = System.currentTimeMillis();
47 result.setResult(new ProduceSuccess(metadata.partition(), metadata.offset()));
49 "{} - Sent key={} message={} partition={}/{} timestamp={} latency={}ms",
62 result.setErrorResult(new ProduceFailure(e));
64 "{} - ERROR key={} timestamp={} latency={}ms: {}",
67 metadata == null ? -1 : metadata.timestamp(),
74 long now = System.currentTimeMillis();
76 "{} - Queued message with key={} latency={}ms",
86 @ResponseStatus(HttpStatus.BAD_REQUEST)
87 public ErrorResponse illegalStateException(IllegalStateException e)
89 return new ErrorResponse(e.getMessage(), HttpStatus.BAD_REQUEST.value());