import lombok.RequiredArgsConstructor;
import lombok.extern.slf4j.Slf4j;
-import org.apache.kafka.clients.consumer.ConsumerRebalanceListener;
+import org.apache.kafka.clients.consumer.Consumer;
import org.apache.kafka.common.TopicPartition;
-import java.time.Clock;
-import java.time.Duration;
-import java.time.Instant;
import java.util.*;
@RequiredArgsConstructor
@Slf4j
-public class ApplicationRebalanceListener implements ConsumerRebalanceListener
+public class ApplicationRebalanceListener implements RebalanceListener
{
private final ApplicationRecordHandler recordHandler;
private final AdderResults adderResults;
private final StateRepository stateRepository;
private final String id;
+ private final String topic;
+ private final Consumer consumer;
private final Set<Integer> partitions = new HashSet<>();
stateRepository
.findById(Integer.toString(partition))
.orElse(new StateDocument(partition));
+ if (document.offset >= 0)
+ {
+ // Only seek, if a stored offset was found
+ // Otherwise: Use initial offset, generated by Kafka
+ consumer.seek(tp, document.offset);
+ log.info(
+ "{} - Seeking to offset {} for partition {}",
+ id,
+ document.offset,
+ partition);
+ }
recordHandler.addPartition(partition, document.state);
for (String user : document.state.keySet())
{
log.info("{} - removing partition: {}", id, partition);
this.partitions.remove(partition);
Map<String, AdderResult> state = recordHandler.removePartition(partition);
+ Long offset = consumer.position(tp);
+ log.info(
+ "{} - offset of next unseen message for partition {} is {}",
+ id,
+ partition,
+ offset);
for (String user : state.keySet())
{
log.info(
state.get(user));
}
Map<String, List<AdderResult>> results = adderResults.removePartition(partition);
- stateRepository.save(new StateDocument(partition, state, results));
+ stateRepository.save(new StateDocument(partition, state, results, offset));
});
}
}