-package de.juplo.kafka;
-
-import lombok.RequiredArgsConstructor;
-import lombok.extern.slf4j.Slf4j;
-import org.apache.kafka.clients.consumer.ConsumerRecord;
-import org.apache.kafka.clients.producer.Producer;
-import org.apache.kafka.clients.producer.ProducerRecord;
-
-
-@RequiredArgsConstructor
-@Slf4j
-public class SumUpRecordHandler implements RecordHandler<String, Integer>
-{
- private final Producer<String, String> producer;
- private final String id;
- private final String topic;
-
-
- @Override
- public void accept(ConsumerRecord<String, Integer> record)
- {
- String key = record.key();
- int number = record.value();
-
- send(key, "START");
- for (int i = 1; i <= number; i++)
- {
- send(key, Integer.toString(i));
- }
- send(key, "END");
- }
-
- private void send(String key, String value)
- {
- final long time = System.currentTimeMillis();
-
- final ProducerRecord<String, String> record = new ProducerRecord<>(
- topic, // Topic
- key, // Key
- value // Value
- );
-
- producer.send(record, (metadata, e) ->
- {
- long now = System.currentTimeMillis();
- if (e == null)
- {
- // HANDLE SUCCESS
- 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
- 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
- );
- }
-}