package de.juplo.kafka;
import lombok.extern.slf4j.Slf4j;
-import org.apache.kafka.clients.consumer.ConsumerRebalanceListener;
import org.apache.kafka.clients.consumer.ConsumerRecord;
import org.apache.kafka.clients.consumer.ConsumerRecords;
import org.apache.kafka.clients.consumer.KafkaConsumer;
-import org.apache.kafka.common.TopicPartition;
import org.apache.kafka.common.errors.WakeupException;
import org.apache.kafka.common.serialization.StringDeserializer;
import javax.annotation.PreDestroy;
import java.time.Duration;
-import java.util.*;
+import java.util.Arrays;
+import java.util.HashMap;
+import java.util.Map;
+import java.util.Properties;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Future;
private KafkaConsumer<String, String> consumer = null;
private Future<?> future = null;
- private final Map<Integer, Map<String, Integer>> seen = new HashMap<>();
+ private Map<Integer, Map<String, Integer>> seen;
public EndlessConsumer(
this.consumer = new KafkaConsumer<>(props);
log.info("{} - Subscribing to topic {}", id, topic);
- consumer.subscribe(Arrays.asList(topic), new ConsumerRebalanceListener()
- {
- @Override
- public void onPartitionsRevoked(Collection<TopicPartition> partitions)
- {
- partitions.forEach(tp ->
- {
- log.info("{} - removing partition: {}", id, tp);
- Map<String, Integer> removed = seen.remove(tp.partition());
- for (String key : removed.keySet())
- {
- log.info(
- "{} - Seen {} messages for partition={}|key={}",
- id,
- removed.get(key),
- removed,
- key);
- }
- });
- }
+ consumer.subscribe(Arrays.asList(topic));
- @Override
- public void onPartitionsAssigned(Collection<TopicPartition> partitions)
- {
- partitions.forEach(tp ->
- {
- log.info("{} - adding partition: {}", id, tp);
- seen.put(tp.partition(), new HashMap<>());
- });
- }
- });
+ seen = new HashMap<>();
while (true)
{
Integer partition = record.partition();
String key = record.key() == null ? "NULL" : record.key();
+
+ if (!seen.containsKey(partition))
+ seen.put(partition, new HashMap<>());
+
Map<String, Integer> byKey = seen.get(partition);
if (!byKey.containsKey(key))
{
log.info("{} - Closing the KafkaConsumer", id);
consumer.close();
+
+ for (Integer partition : seen.keySet())
+ {
+ Map<String, Integer> byKey = seen.get(partition);
+ for (String key : byKey.keySet())
+ {
+ log.info(
+ "{} - Seen {} messages for partition={}|key={}",
+ id,
+ byKey.get(key),
+ partition,
+ key);
+ }
+ }
+ seen = null;
+
log.info("{} - Consumer-Thread exiting", id);
}
}