io.smallrye.reactive.messaging.kafka.api

Class KafkaMetadataUtil

java.lang.Object

io.smallrye.reactive.messaging.kafka.api.KafkaMetadataUtil

public class KafkaMetadataUtil
extends Object

Utility to access KafkaMessageMetadata in a Message.

Constructor Summary

Constructors

Constructor and Description
KafkaMetadataUtil()

Method Summary

Modifier and Type	Method and Description
static Optional<IncomingKafkaRecordMetadata>	readIncomingKafkaMetadata(Message<?> msg) Read IncomingKafkaRecordMetadata from a Message.
static <T,K> Message<T>	writeOutgoingKafkaMetadata(Message<T> msg, OutgoingKafkaRecordMetadata<K> outgoingKafkaRecordMetadata) Write OutgoingKafkaRecordMetadata to a Message.

Methods inherited from class java.lang.Object

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

Constructor Detail

KafkaMetadataUtil

public KafkaMetadataUtil()

Method Detail

readIncomingKafkaMetadata

public static Optional<IncomingKafkaRecordMetadata> readIncomingKafkaMetadata(Message<?> msg)

Read IncomingKafkaRecordMetadata from a Message.

Parameters:

msg - the message. Must not be null

Returns:

The IncomingKafkaRecordMetadata. May return null, for example if the message is not received from a channel backed by Kafka

Throws:

NullPointerException - if msg is null

writeOutgoingKafkaMetadata

public static <T,K> Message<T> writeOutgoingKafkaMetadata(Message<T> msg,
                                                          OutgoingKafkaRecordMetadata<K> outgoingKafkaRecordMetadata)

Write OutgoingKafkaRecordMetadata to a Message. Note that Message is immutable, so the passed in parameter will not have the OutgoingKafkaRecordMetadata added. This method returns a new instance of Message with the OutgoingKafkaRecordMetadata added.

Parameters:

msg - the message. Must not be null

outgoingKafkaRecordMetadata - the OutgoingKafkaRecordMetadata to write. Must not be null

Returns:

a clone of with the OutgoingKafkaRecordMetadata added

Throws:

NullPointerException - if msg or outgoingKafkaRecordMetadata are null