+++ /dev/null
-package de.juplo.kafka;
-
-import lombok.RequiredArgsConstructor;
-import lombok.extern.slf4j.Slf4j;
-import org.apache.kafka.clients.producer.KafkaProducer;
-import org.apache.kafka.clients.producer.ProducerRecord;
-import org.springframework.http.HttpStatus;
-import org.springframework.web.bind.annotation.*;
-import org.springframework.web.context.request.async.DeferredResult;
-
-import java.math.BigInteger;
-
-
-@Slf4j
-@RequestMapping
-@ResponseBody
-@RequiredArgsConstructor
-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;
-
- @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<>();
-
- final long time = System.currentTimeMillis();
-
- 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();
- if (e == null)
- {
- // HANDLE SUCCESS
- produced++;
- result.setResult(new ProduceSuccess(metadata.partition(), metadata.offset()));
- log.debug(
- "{} - Sent key={} message={} partition={}/{} timestamp={} latency={}ms",
- id,
- record.key(),
- record.value(),
- metadata.partition(),
- metadata.offset(),
- metadata.timestamp(),
- now - time
- );
- }
- else
- {
- // HANDLE ERROR
- result.setErrorResult(new ProduceFailure(e));
- log.error(
- "{} - ERROR key={} timestamp={} latency={}ms: {}",
- id,
- record.key(),
- metadata == null ? -1 : metadata.timestamp(),
- now - time,
- e.toString()
- );
- }
- });
-
- long now = System.currentTimeMillis();
- log.trace(
- "{} - Queued message with key={} latency={}ms",
- id,
- record.key(),
- now - time
- );
-
- return result;
- }
-
- @ExceptionHandler
- @ResponseStatus(HttpStatus.BAD_REQUEST)
- public ErrorResponse illegalStateException(IllegalStateException e)
- {
- return new ErrorResponse(e.getMessage(), HttpStatus.BAD_REQUEST.value());
- }
-}