KafkaMetadataKeys (Lagom Services API)

```
public final class KafkaMetadataKeys
extends Object
```
Metadata keys specific to the Kafka broker implementation.

Fields
Modifier and Type	Field and Description
`static MetadataKey<org.apache.kafka.common.header.Headers>`	`HEADERS` The Kafka message headers.
`static MetadataKey<Long>`	`OFFSET` The offset of the message in its partition.
`static MetadataKey<Integer>`	`PARTITION` The partition the message is published to.
`static MetadataKey<Long>`	`TIMESTAMP` The timestamp of the Kafka message.
`static MetadataKey<org.apache.kafka.common.record.TimestampType>`	`TIMESTAMP_TYPE` The timestamp type of the Kafka message.
`static MetadataKey<String>`	`TOPIC` The topic the message is published to.

Method Summary
- Methods inherited from class Object
  equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

public static final MetadataKey<Integer> PARTITION

The partition the message is published to.

OFFSET
```
public static final MetadataKey<Long> OFFSET
```
The offset of the message in its partition.

public static final MetadataKey<String> TOPIC

The topic the message is published to.

public static final MetadataKey<org.apache.kafka.common.header.Headers> HEADERS

The Kafka message headers.

TIMESTAMP
```
public static final MetadataKey<Long> TIMESTAMP
```
The timestamp of the Kafka message. This could have a different meaning depending on TimestampType.

public static final MetadataKey<org.apache.kafka.common.record.TimestampType> TIMESTAMP_TYPE

The timestamp type of the Kafka message.

Class KafkaMetadataKeys