import javax.annotation.PreDestroy;
import java.time.Duration;
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;
private KafkaConsumer<String, String> consumer = null;
private Future<?> future = null;
+ private Map<Integer, Map<String, Integer>> seen;
+
+
public EndlessConsumer(
ExecutorService executor,
String bootstrapServer,
props.put("group.id", groupId);
props.put("client.id", id);
props.put("auto.offset.reset", autoOffsetReset);
+ props.put("metadata.max.age.ms", "1000");
props.put("key.deserializer", StringDeserializer.class.getName());
props.put("value.deserializer", StringDeserializer.class.getName());
log.info("{} - Subscribing to topic {}", id, topic);
consumer.subscribe(Arrays.asList(topic));
+ seen = new HashMap<>();
+
while (true)
{
ConsumerRecords<String, String> records =
record.key(),
record.value()
);
+
+ 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))
+ byKey.put(key, 0);
+
+ int seenByKey = byKey.get(key);
+ seenByKey++;
+ byKey.put(key, seenByKey);
}
}
}
{
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);
}
}
+ public Map<Integer, Map<String, Integer>> getSeen()
+ {
+ return seen;
+ }
public synchronized void start()
{