Package org.apache.kafka.clients.producer

Class RecordMetadata

java.lang.Object

org.apache.kafka.clients.producer.RecordMetadata

public final class RecordMetadata
extends java.lang.Object

The metadata for a record that has been acknowledged by the server

Field Summary

Fields

Modifier and Type	Field	Description
static int	UNKNOWN_PARTITION	Partition value for record without partition assigned

Constructor Summary

Constructors

Constructor	Description
RecordMetadata(TopicPartition topicPartition, long baseOffset, long relativeOffset, long timestamp, java.lang.Long checksum, int serializedKeySize, int serializedValueSize)

Method Summary

Modifier and Type	Method	Description
long	checksum()	Deprecated. As of Kafka 0.11.0. Because of the potential for message format conversion on the broker, the computed checksum may not match what was stored on the broker, or what will be returned to the consumer. It is therefore unsafe to depend on this checksum for end-to-end delivery guarantees. Additionally, message format v2 does not include a record-level checksum (for performance, the record checksum was replaced with a batch checksum). To maintain compatibility, a partial checksum computed from the record timestamp, serialized key size, and serialized value size is returned instead, but this should not be depended on for end-to-end reliability.
boolean	hasOffset()	Indicates whether the record metadata includes the offset.
boolean	hasTimestamp()	Indicates whether the record metadata includes the timestamp.
long	offset()	The offset of the record in the topic/partition.
int	partition()	The partition the record was sent to
int	serializedKeySize()	The size of the serialized, uncompressed key in bytes.
int	serializedValueSize()	The size of the serialized, uncompressed value in bytes.
long	timestamp()	The timestamp of the record in the topic/partition.
java.lang.String	topic()	The topic the record was appended to
java.lang.String	toString()

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

UNKNOWN_PARTITION

public static final int UNKNOWN_PARTITION

Partition value for record without partition assigned

See Also:

Constant Field Values

Constructor Detail

RecordMetadata

public RecordMetadata(TopicPartition topicPartition,
                      long baseOffset,
                      long relativeOffset,
                      long timestamp,
                      java.lang.Long checksum,
                      int serializedKeySize,
                      int serializedValueSize)

Method Detail

hasOffset

public boolean hasOffset()

Indicates whether the record metadata includes the offset.

Returns:

true if the offset is included in the metadata, false otherwise.

offset

public long offset()

The offset of the record in the topic/partition.

Returns:

the offset of the record, or -1 if {hasOffset()} returns false.

hasTimestamp

public boolean hasTimestamp()

Indicates whether the record metadata includes the timestamp.

Returns:

true if a valid timestamp exists, false otherwise.

timestamp

public long timestamp()

The timestamp of the record in the topic/partition.

Returns:

the timestamp of the record, or -1 if the {hasTimestamp()} returns false.

checksum

@Deprecated
public long checksum()

Deprecated. As of Kafka 0.11.0. Because of the potential for message format conversion on the broker, the computed checksum may not match what was stored on the broker, or what will be returned to the consumer. It is therefore unsafe to depend on this checksum for end-to-end delivery guarantees. Additionally, message format v2 does not include a record-level checksum (for performance, the record checksum was replaced with a batch checksum). To maintain compatibility, a partial checksum computed from the record timestamp, serialized key size, and serialized value size is returned instead, but this should not be depended on for end-to-end reliability.

The checksum (CRC32) of the record.

serializedKeySize

public int serializedKeySize()

The size of the serialized, uncompressed key in bytes. If key is null, the returned size is -1.

serializedValueSize

public int serializedValueSize()

The size of the serialized, uncompressed value in bytes. If value is null, the returned size is -1.

topic

public java.lang.String topic()

The topic the record was appended to

partition

public int partition()

The partition the record was sent to

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object