Package org.apache.kafka.streams.kstream

Interface ValueTransformerWithKeySupplier<K,V,VR>

Type Parameters:

K - key type

V - value type

VR - transformed value type

All Superinterfaces:

ConnectedStoreProvider, Supplier<ValueTransformerWithKey<K,V,VR>>

public interface ValueTransformerWithKeySupplier<K,V,VR>
extends ConnectedStoreProvider, Supplier<ValueTransformerWithKey<K,V,VR>>

A ValueTransformerWithKeySupplier interface which can create one or more ValueTransformerWithKey instances.

The supplier should always generate a new instance each time get() gets called. Creating a single ValueTransformerWithKey object and returning the same object reference in get() would be a violation of the supplier pattern and leads to runtime exceptions.

See Also:

• ValueTransformer
• ValueTransformerWithKey
• KStream.transformValues(ValueTransformerSupplier, String...)
• KStream.transformValues(ValueTransformerWithKeySupplier, String...)
• Transformer
• TransformerSupplier
• KStream.transform(TransformerSupplier, String...)

Method Summary

Modifier and Type	Method	Description
ValueTransformerWithKey<K,V,VR>	get()	Return a newly constructed ValueTransformerWithKey instance.

Methods inherited from interface org.apache.kafka.streams.processor.ConnectedStoreProvider

stores

Method Details

get

ValueTransformerWithKey<K,V,VR> get()

Return a newly constructed ValueTransformerWithKey instance. The supplier should always generate a new instance each time get() gets called.

Creating a single ValueTransformerWithKey object and returning the same object reference in get() is a violation of the supplier pattern and leads to runtime exceptions.

Specified by:

get in interface Supplier<K>

Returns:

a newly constructed ValueTransformerWithKey instance