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[demos/kafka/training] / src / main / java / de / juplo / kafka / AdderRebalanceListener.java

diff --git a/src/main/java/de/juplo/kafka/AdderRebalanceListener.java b/src/main/java/de/juplo/kafka/AdderRebalanceListener.java
deleted file mode 100644 (file)
index ef595ba..0000000
--- a/src/main/java/de/juplo/kafka/AdderRebalanceListener.java
+++ /dev/null
@@ -1,106 +0,0 @@
-package de.juplo.kafka;
-
-import lombok.RequiredArgsConstructor;
-import lombok.extern.slf4j.Slf4j;
-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.Collection;
-
-
-@RequiredArgsConstructor
-@Slf4j
-public class AdderRebalanceListener implements PollIntervalAwareConsumerRebalanceListener
-{
-  private final AdderRecordHandler handler;
-  private final PartitionStatisticsRepository repository;
-  private final String id;
-  private final String topic;
-  private final Clock clock;
-  private final Duration commitInterval;
-  private final Consumer<String, String> consumer;
-
-  private Instant lastCommit = Instant.EPOCH;
-  private boolean commitsEnabled = true;
-
-  @Override
-  public void onPartitionsAssigned(Collection<TopicPartition> partitions)
-  {
-    partitions.forEach(tp ->
-    {
-      Integer partition = tp.partition();
-      StateDocument document =
-          repository
-              .findById(Integer.toString(partition))
-              .orElse(new StateDocument(partition));
-      log.info("{} - adding partition: {}, offset={}", id, partition, document.offset);
-      if (document.offset >= 0)
-      {
-        // Only seek, if a stored offset was found
-        // Otherwise: Use initial offset, generated by Kafka
-        consumer.seek(tp, document.offset);
-      }
-      handler.addPartition(partition, document.state);
-    });
-  }
-
-  @Override
-  public void onPartitionsRevoked(Collection<TopicPartition> partitions)
-  {
-    partitions.forEach(tp ->
-    {
-      Integer partition = tp.partition();
-      Long offset = consumer.position(tp);
-      log.info(
-          "{} - removing partition: {}, offset of next message {})",
-          id,
-          partition,
-          offset);
-      if (commitsEnabled)
-      {
-        repository.save(new StateDocument(partition, handler.removePartition(partition), offset));
-      }
-      else
-      {
-        log.info("Offset commits are disabled! Last commit: {}", lastCommit);
-      }
-    });
-  }
-
-
-  @Override
-  public void beforeNextPoll()
-  {
-    if (!commitsEnabled)
-    {
-      log.info("Offset commits are disabled! Last commit: {}", lastCommit);
-      return;
-    }
-
-    if (lastCommit.plus(commitInterval).isBefore(clock.instant()))
-    {
-      log.debug("Storing data and offsets, last commit: {}", lastCommit);
-      handler.getState().forEach((partiton, sumBusinessLogic) -> repository.save(
-          new StateDocument(
-              partiton,
-              sumBusinessLogic.getState(),
-              consumer.position(new TopicPartition(topic, partiton)))));
-      lastCommit = clock.instant();
-    }
-  }
-
-  @Override
-  public void enableCommits()
-  {
-    commitsEnabled = true;
-  }
-
-  @Override
-  public void disableCommits()
-  {
-    commitsEnabled = false;
-  }
-}