Package org.apache.kafka.clients.consumer

Class OffsetAndMetadata

java.lang.Object

org.apache.kafka.clients.consumer.OffsetAndMetadata

All Implemented Interfaces:

Serializable

public class OffsetAndMetadata
extends Object
implements Serializable

The Kafka offset commit API allows users to provide additional metadata (in the form of a string) when an offset is committed. This can be useful (for example) to store information about which node made the commit, what time the commit was made, etc.

See Also:

• Serialized Form

Constructor Summary

Constructors

Constructor	Description
OffsetAndMetadata(long offset)	Construct a new OffsetAndMetadata object for committing through KafkaConsumer.
OffsetAndMetadata(long offset, String metadata)	Construct a new OffsetAndMetadata object for committing through KafkaConsumer.
OffsetAndMetadata(long offset, Optional<Integer> leaderEpoch, String metadata)	Construct a new OffsetAndMetadata object for committing through KafkaConsumer.

Method Summary

Modifier and Type	Method	Description
boolean	equals(Object o)
int	hashCode()
Optional<Integer>	leaderEpoch()	Get the leader epoch of the previously consumed record (if one is known).
String	metadata()
long	offset()
String	toString()

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Details

OffsetAndMetadata

public OffsetAndMetadata(long offset,
 Optional<Integer> leaderEpoch,
 String metadata)

Construct a new OffsetAndMetadata object for committing through KafkaConsumer.

Parameters:

offset - The offset to be committed

leaderEpoch - Optional leader epoch of the last consumed record

metadata - Non-null metadata

OffsetAndMetadata

public OffsetAndMetadata(long offset,
 String metadata)

Construct a new OffsetAndMetadata object for committing through KafkaConsumer.

Parameters:

offset - The offset to be committed

metadata - Non-null metadata

OffsetAndMetadata

public OffsetAndMetadata(long offset)

Construct a new OffsetAndMetadata object for committing through KafkaConsumer. The metadata associated with the commit will be empty.

Parameters:

offset - The offset to be committed

Method Details

offset

public long offset()

metadata

public String metadata()

leaderEpoch

public Optional<Integer> leaderEpoch()

Get the leader epoch of the previously consumed record (if one is known). Log truncation is detected if there exists a leader epoch which is larger than this epoch and begins at an offset earlier than the committed offset.

Returns:

the leader epoch or empty if not known

equals

public boolean equals(Object o)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object

toString

public String toString()

Overrides:

toString in class Object