1 package de.juplo.kafka;
3 import lombok.RequiredArgsConstructor;
4 import lombok.extern.slf4j.Slf4j;
5 import org.apache.kafka.clients.consumer.ConsumerRecord;
6 import org.apache.kafka.clients.producer.Producer;
7 import org.apache.kafka.clients.producer.ProducerRecord;
10 @RequiredArgsConstructor
12 public class ApplicationRecordHandler implements RecordHandler<String, Integer>
14 private final Producer<String, String> producer;
15 private final String id;
16 private final String topic;
20 public void accept(ConsumerRecord<String, Integer> record)
22 String key = record.key();
23 int number = record.value();
25 for (int i = 1; i <= number; i++)
27 send(key, Integer.toString(i));
29 send(key, "CALCULATE");
32 private void send(String key, String value)
34 final long time = System.currentTimeMillis();
36 final ProducerRecord<String, String> record = new ProducerRecord<>(
42 producer.send(record, (metadata, e) ->
44 long now = System.currentTimeMillis();
49 "{} - Sent key={} message={} partition={}/{} timestamp={} latency={}ms",
63 "{} - ERROR key={} timestamp={} latency={}ms: {}",
66 metadata == null ? -1 : metadata.timestamp(),
73 long now = System.currentTimeMillis();
75 "{} - Queued message with key={} latency={}ms",