import lombok.RequiredArgsConstructor;
import lombok.extern.slf4j.Slf4j;
+import org.apache.kafka.clients.consumer.ConsumerRebalanceListener;
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 PollIntervalAwareConsumerRebalanceListener
+public class ApplicationRebalanceListener implements ConsumerRebalanceListener
{
private final ApplicationRecordHandler recordHandler;
private final AdderResults adderResults;
private final StateRepository stateRepository;
private final String id;
- private final Clock clock;
- private final Duration commitInterval;
private final Set<Integer> partitions = new HashSet<>();
- private Instant lastCommit = Instant.EPOCH;
-
@Override
public void onPartitionsAssigned(Collection<TopicPartition> partitions)
{
{
Integer partition = tp.partition();
log.info("{} - adding partition: {}", id, partition);
- this.partitions.add(partition);
- StateDocument document =
- stateRepository
- .findById(Integer.toString(partition))
- .orElse(new StateDocument(partition));
- recordHandler.addPartition(partition, document.state);
- adderResults.addPartition(partition, document.results);
});
}
{
Integer partition = tp.partition();
log.info("{} - removing partition: {}", id, partition);
- this.partitions.remove(partition);
- Map<String, AdderResult> state = recordHandler.removePartition(partition);
+ Map<String, AdderResult> state = recordHandler.getState(partition).getState();
for (String user : state.keySet())
{
log.info(
- "{} - Calculations for partition={}|user={}: {}",
+ "{} - Saved state for partition={}|user={}: {}",
id,
partition,
user,
state.get(user));
}
- Map<String, List<AdderResult>> results = adderResults.removePartition(partition);
- stateRepository.save(new StateDocument(partition, state, results));
});
}
-
-
- @Override
- public void beforeNextPoll()
- {
- if (lastCommit.plus(commitInterval).isBefore(clock.instant()))
- {
- log.debug("Storing data, last commit: {}", lastCommit);
- partitions.forEach(partition -> stateRepository.save(
- new StateDocument(
- partition,
- recordHandler.getState(partition).getState(),
- adderResults.getState(partition))));
- lastCommit = clock.instant();
- }
- }
}