java.lang.Object
- org.springframework.kafka.support.KafkaHeaders

```
public abstract class KafkaHeaders
extends java.lang.Object
```
The Kafka specific message headers constants.

Author:

Artem Bilan, Marius Bogoevici, Gary Russell, Biju Kunjummen

Field Summary

Fields
Modifier and Type	Field	Description
`static java.lang.String`	`ACKNOWLEDGMENT`	The header for the `Acknowledgment`.
`static java.lang.String`	`BATCH_CONVERTED_HEADERS`	The header for a list of Maps of converted native Kafka headers.
`static java.lang.String`	`CONSUMER`	The header for the `Consumer` object.
`static java.lang.String`	`CORRELATION_ID`	The header containing information to correlate requests/replies.
`static java.lang.String`	`DELIVERY_ATTEMPT`	For inbound messages, when container retries are enabled the delivery attempt.
`static java.lang.String`	`DLT_EXCEPTION_FQCN`	Exception class name for a record published sent to a dead-letter topic.
`static java.lang.String`	`DLT_EXCEPTION_MESSAGE`	Exception message for a record published to a dead-letter topic.
`static java.lang.String`	`DLT_EXCEPTION_STACKTRACE`	Exception stack trace for a record published to a dead-letter topic.
`static java.lang.String`	`DLT_KEY_EXCEPTION_FQCN`	Exception class name for a record published sent to a dead-letter topic with a key deserialization exception.
`static java.lang.String`	`DLT_KEY_EXCEPTION_MESSAGE`	Exception message for a record published to a dead-letter topic with a key deserialization exception.
`static java.lang.String`	`DLT_KEY_EXCEPTION_STACKTRACE`	Exception stack trace for a record published to a dead-letter topic with a key deserialization exception.
`static java.lang.String`	`DLT_ORIGINAL_OFFSET`	Original offset for a record published to a dead-letter topic.
`static java.lang.String`	`DLT_ORIGINAL_PARTITION`	Original partition for a record published to a dead-letter topic.
`static java.lang.String`	`DLT_ORIGINAL_TIMESTAMP`	Original timestamp for a record published to a dead-letter topic.
`static java.lang.String`	`DLT_ORIGINAL_TIMESTAMP_TYPE`	Original timestamp type for a record published to a dead-letter topic.
`static java.lang.String`	`DLT_ORIGINAL_TOPIC`	Original topic for a record published to a dead-letter topic.
`static java.lang.String`	`GROUP_ID`	For inbound messages, the container's `group.id` consumer property.
`static java.lang.String`	`MESSAGE_KEY`	The header containing the message key when sending data to Kafka.
`static java.lang.String`	`NATIVE_HEADERS`	The header for holding the native headers of the consumer record; only provided if no header mapper is present.
`static java.lang.String`	`OFFSET`	The header for the partition offset.
`static java.lang.String`	`PARTITION_ID`	The header containing the topic partition when sending data to Kafka.
`static java.lang.String`	`PREFIX`	The prefix for Kafka headers.
`static java.lang.String`	`RAW_DATA`	The header containing the raw data received from Kafka (`ConsumerRecord` or `ConsumerRecords`).
`static java.lang.String`	`RECEIVED`	The prefix for Kafka headers containing 'received' values.
`static java.lang.String`	`RECEIVED_MESSAGE_KEY`	The header containing the message key for the received message.
`static java.lang.String`	`RECEIVED_PARTITION_ID`	The header containing the topic partition for the received message.
`static java.lang.String`	`RECEIVED_TIMESTAMP`	The header for holding the timestamp of the consumer record.
`static java.lang.String`	`RECEIVED_TOPIC`	The header containing the topic from which the message was received.
`static java.lang.String`	`RECORD_METADATA`	The header containing the `RecordMetadata` object after successful send to the topic.
`static java.lang.String`	`REPLY_PARTITION`	The header containing a partition number on which to send the reply.
`static java.lang.String`	`REPLY_TOPIC`	The header containing the default reply topic.
`static java.lang.String`	`TIMESTAMP`	The header for holding the timestamp of the producer record.
`static java.lang.String`	`TIMESTAMP_TYPE`	The header for holding the `type` of timestamp.
`static java.lang.String`	`TOPIC`	The header containing the topic when sending data to Kafka.

Constructor Summary

Constructors
Constructor Description

KafkaHeaders()

Method Summary
- Methods inherited from class java.lang.Object
  clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Field Detail
  - PREFIX
```
public static final java.lang.String PREFIX
```
    The prefix for Kafka headers.
    
    See Also:
    
    Constant Field Values
  - RECEIVED
```
public static final java.lang.String RECEIVED
```
    The prefix for Kafka headers containing 'received' values.
    
    See Also:
    
    Constant Field Values
  - TOPIC
```
public static final java.lang.String TOPIC
```
    The header containing the topic when sending data to Kafka.
    
    See Also:
    
    Constant Field Values
  - MESSAGE_KEY
```
public static final java.lang.String MESSAGE_KEY
```
    The header containing the message key when sending data to Kafka.
    
    See Also:
    
    Constant Field Values
  - PARTITION_ID
```
public static final java.lang.String PARTITION_ID
```
    The header containing the topic partition when sending data to Kafka.
    
    See Also:
    
    Constant Field Values
  - OFFSET
```
public static final java.lang.String OFFSET
```
    The header for the partition offset.
    
    See Also:
    
    Constant Field Values
  - RAW_DATA
```
public static final java.lang.String RAW_DATA
```
    The header containing the raw data received from Kafka (ConsumerRecord or ConsumerRecords). Usually used to enhance error messages.
    
    See Also:
    
    Constant Field Values
  - RECORD_METADATA
```
public static final java.lang.String RECORD_METADATA
```
    The header containing the RecordMetadata object after successful send to the topic.
    
    See Also:
    
    Constant Field Values
  - ACKNOWLEDGMENT
```
public static final java.lang.String ACKNOWLEDGMENT
```
    The header for the Acknowledgment.
    
    See Also:
    
    Constant Field Values
  - CONSUMER
```
public static final java.lang.String CONSUMER
```
    The header for the Consumer object.
    
    See Also:
    
    Constant Field Values
  - RECEIVED_TOPIC
```
public static final java.lang.String RECEIVED_TOPIC
```
    The header containing the topic from which the message was received.
    
    See Also:
    
    Constant Field Values
  - RECEIVED_MESSAGE_KEY
```
public static final java.lang.String RECEIVED_MESSAGE_KEY
```
    The header containing the message key for the received message.
    
    See Also:
    
    Constant Field Values
  - RECEIVED_PARTITION_ID
```
public static final java.lang.String RECEIVED_PARTITION_ID
```
    The header containing the topic partition for the received message.
    
    See Also:
    
    Constant Field Values
  - TIMESTAMP_TYPE
```
public static final java.lang.String TIMESTAMP_TYPE
```
    The header for holding the type of timestamp.
    
    See Also:
    
    Constant Field Values
  - TIMESTAMP
```
public static final java.lang.String TIMESTAMP
```
    The header for holding the timestamp of the producer record.
    
    See Also:
    
    Constant Field Values
  - RECEIVED_TIMESTAMP
```
public static final java.lang.String RECEIVED_TIMESTAMP
```
    The header for holding the timestamp of the consumer record.
    
    See Also:
    
    Constant Field Values
  - NATIVE_HEADERS
```
public static final java.lang.String NATIVE_HEADERS
```
    The header for holding the native headers of the consumer record; only provided if no header mapper is present.
    
    See Also:
    
    Constant Field Values
  - BATCH_CONVERTED_HEADERS
```
public static final java.lang.String BATCH_CONVERTED_HEADERS
```
    The header for a list of Maps of converted native Kafka headers. Used for batch listeners; the map at a particular list position corresponds to the data in the payload list position.
    
    See Also:
    
    Constant Field Values
  - CORRELATION_ID
```
public static final java.lang.String CORRELATION_ID
```
    The header containing information to correlate requests/replies. Type: byte[].
    
    Since:
    
    2.1.3
    
    See Also:
    
    Constant Field Values
  - REPLY_TOPIC
```
public static final java.lang.String REPLY_TOPIC
```
    The header containing the default reply topic. Type: byte[].
    
    Since:
    
    2.1.3
    
    See Also:
    
    Constant Field Values
  - REPLY_PARTITION
```
public static final java.lang.String REPLY_PARTITION
```
    The header containing a partition number on which to send the reply. Type: binary (int) in byte[].
    
    Since:
    
    2.1.3
    
    See Also:
    
    Constant Field Values
  - DLT_EXCEPTION_FQCN
```
public static final java.lang.String DLT_EXCEPTION_FQCN
```
    Exception class name for a record published sent to a dead-letter topic.
    
    Since:
    
    2.2
    
    See Also:
    
    Constant Field Values
  - DLT_EXCEPTION_STACKTRACE
```
public static final java.lang.String DLT_EXCEPTION_STACKTRACE
```
    Exception stack trace for a record published to a dead-letter topic.
    
    Since:
    
    2.2
    
    See Also:
    
    Constant Field Values
  - DLT_EXCEPTION_MESSAGE
```
public static final java.lang.String DLT_EXCEPTION_MESSAGE
```
    Exception message for a record published to a dead-letter topic.
    
    Since:
    
    2.2
    
    See Also:
    
    Constant Field Values
  - DLT_KEY_EXCEPTION_STACKTRACE
```
public static final java.lang.String DLT_KEY_EXCEPTION_STACKTRACE
```
    Exception stack trace for a record published to a dead-letter topic with a key deserialization exception.
    
    Since:
    
    2.7
    
    See Also:
    
    Constant Field Values
  - DLT_KEY_EXCEPTION_MESSAGE
```
public static final java.lang.String DLT_KEY_EXCEPTION_MESSAGE
```
    Exception message for a record published to a dead-letter topic with a key deserialization exception.
    
    Since:
    
    2.7
    
    See Also:
    
    Constant Field Values
  - DLT_KEY_EXCEPTION_FQCN
```
public static final java.lang.String DLT_KEY_EXCEPTION_FQCN
```
    Exception class name for a record published sent to a dead-letter topic with a key deserialization exception.
    
    Since:
    
    2.7
    
    See Also:
    
    Constant Field Values
  - DLT_ORIGINAL_TOPIC
```
public static final java.lang.String DLT_ORIGINAL_TOPIC
```
    Original topic for a record published to a dead-letter topic.
    
    Since:
    
    2.2
    
    See Also:
    
    Constant Field Values
  - DLT_ORIGINAL_PARTITION
```
public static final java.lang.String DLT_ORIGINAL_PARTITION
```
    Original partition for a record published to a dead-letter topic.
    
    Since:
    
    2.2
    
    See Also:
    
    Constant Field Values
  - DLT_ORIGINAL_OFFSET
```
public static final java.lang.String DLT_ORIGINAL_OFFSET
```
    Original offset for a record published to a dead-letter topic.
    
    Since:
    
    2.2
    
    See Also:
    
    Constant Field Values
  - DLT_ORIGINAL_TIMESTAMP
```
public static final java.lang.String DLT_ORIGINAL_TIMESTAMP
```
    Original timestamp for a record published to a dead-letter topic.
    
    Since:
    
    2.2
    
    See Also:
    
    Constant Field Values
  - DLT_ORIGINAL_TIMESTAMP_TYPE
```
public static final java.lang.String DLT_ORIGINAL_TIMESTAMP_TYPE
```
    Original timestamp type for a record published to a dead-letter topic.
    
    Since:
    
    2.2
    
    See Also:
    
    Constant Field Values
  - GROUP_ID
```
public static final java.lang.String GROUP_ID
```
    For inbound messages, the container's group.id consumer property.
    
    Since:
    
    2.3
    
    See Also:
    
    Constant Field Values
  - DELIVERY_ATTEMPT
```
public static final java.lang.String DELIVERY_ATTEMPT
```
    For inbound messages, when container retries are enabled the delivery attempt.
    
    Since:
    
    2.5
    
    See Also:
    
    Constant Field Values
- Constructor Detail
  - KafkaHeaders
```
public KafkaHeaders()
```

Class KafkaHeaders

Field Summary

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Field Detail

PREFIX

RECEIVED

TOPIC

MESSAGE_KEY

PARTITION_ID

OFFSET

RAW_DATA

RECORD_METADATA

ACKNOWLEDGMENT

CONSUMER

RECEIVED_TOPIC

RECEIVED_MESSAGE_KEY

RECEIVED_PARTITION_ID

TIMESTAMP_TYPE

TIMESTAMP

RECEIVED_TIMESTAMP

NATIVE_HEADERS

BATCH_CONVERTED_HEADERS

CORRELATION_ID

REPLY_TOPIC

REPLY_PARTITION

DLT_EXCEPTION_FQCN

DLT_EXCEPTION_STACKTRACE

DLT_EXCEPTION_MESSAGE

DLT_KEY_EXCEPTION_STACKTRACE

DLT_KEY_EXCEPTION_MESSAGE

DLT_KEY_EXCEPTION_FQCN

DLT_ORIGINAL_TOPIC

DLT_ORIGINAL_PARTITION

DLT_ORIGINAL_OFFSET

DLT_ORIGINAL_TIMESTAMP

DLT_ORIGINAL_TIMESTAMP_TYPE

GROUP_ID

DELIVERY_ATTEMPT

Constructor Detail

KafkaHeaders