org.apache.kafka.streams.processor

Interface TopicNameExtractor<K,V>

@InterfaceStability.Evolving
public interface TopicNameExtractor<K,V>

An interface that allows to dynamically determine the name of the Kafka topic to send at the sink node of the topology.

Method Summary

Modifier and Type	Method and Description
String	extract(K key, V value, RecordContext recordContext) Extracts the topic name to send to.

Method Detail

extract

String extract(K key,
               V value,
               RecordContext recordContext)

Extracts the topic name to send to. The topic name must already exist, since the Kafka Streams library will not try to automatically create the topic with the extracted name.

Parameters:

key - the record key

value - the record value

recordContext - current context metadata of the record

Returns:

the topic name this record should be sent to