Package org.apache.kafka.streams.kstream
Interface ValueJoiner<V1,V2,VR>
- Type Parameters:
V1
- first value typeV2
- second value typeVR
- joined value type
public interface ValueJoiner<V1,V2,VR>
The
ValueJoiner
interface for joining two values into a new value of arbitrary type.
This is a stateless operation, i.e, apply(Object, Object)
is invoked individually for each joining
record-pair of a KStream
-KStream
, KStream
-KTable
, or KTable
-KTable
join.- See Also:
-
KStream.join(KStream, ValueJoiner, JoinWindows)
KStream.join(KStream, ValueJoiner, JoinWindows, StreamJoined)
KStream.leftJoin(KStream, ValueJoiner, JoinWindows)
KStream.leftJoin(KStream, ValueJoiner, JoinWindows, StreamJoined)
KStream.outerJoin(KStream, ValueJoiner, JoinWindows)
KStream.outerJoin(KStream, ValueJoiner, JoinWindows, StreamJoined)
KStream.join(KTable, ValueJoiner)
KStream.join(KTable, ValueJoiner, Joined)
KStream.leftJoin(KTable, ValueJoiner)
KStream.leftJoin(KTable, ValueJoiner, Joined)
KTable.join(KTable, ValueJoiner)
KTable.leftJoin(KTable, ValueJoiner)
KTable.outerJoin(KTable, ValueJoiner)
-
Method Summary
-
Method Details
-
apply
Return a joined value consisting ofvalue1
andvalue2
.- Parameters:
value1
- the first value for joiningvalue2
- the second value for joining- Returns:
- the joined value
-