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.springframework.kafka.annotation.KafkaListener;
7 import org.springframework.kafka.config.KafkaListenerEndpointRegistry;
10 import java.util.Optional;
13 @RequiredArgsConstructor
15 public class EndlessConsumer<K, V>
17 private final String id;
18 private final KafkaListenerEndpointRegistry registry;
19 private final ApplicationErrorHandler errorHandler;
20 private final RecordHandler<K, V> recordHandler;
22 private long consumed = 0;
26 id = "${spring.kafka.client-id}",
28 topics = "${sumup.adder.topic}",
29 autoStartup = "false")
30 public void accept(ConsumerRecord<K, V> record)
33 "{} - {}: {}/{} - {}={}",
42 recordHandler.accept(record);
50 throw new IllegalStateException("Consumer instance " + id + " is already running!");
52 log.info("{} - Starting - consumed {} messages before", id, consumed);
53 errorHandler.clearState();
54 registry.getListenerContainer(id).start();
60 throw new IllegalStateException("Consumer instance " + id + " is not running!");
62 log.info("{} - Stopping", id);
63 registry.getListenerContainer(id).stop();
64 log.info("{} - Stopped - consumed {} messages so far", id, consumed);
67 public boolean running()
69 return registry.getListenerContainer(id).isRunning();
72 public Optional<Exception> exitStatus()
75 throw new IllegalStateException("No exit-status available: Consumer instance " + id + " is running!");
77 return errorHandler.getException();