Package org.apache.kafka.streams.kstream

Interface ValueTransformerSupplier<V,VR>

Type Parameters:

V - value type

VR - transformed value type

All Superinterfaces:

ConnectedStoreProvider

public interface ValueTransformerSupplier<V,VR>
extends ConnectedStoreProvider

A ValueTransformerSupplier interface which can create one or more ValueTransformer instances.

The supplier should always generate a new instance each time get() gets called. Creating a single ValueTransformer 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
• ValueTransformerWithKeySupplier
• KStream.transformValues(ValueTransformerSupplier, String...)
• KStream.transformValues(ValueTransformerWithKeySupplier, String...)
• Transformer
• TransformerSupplier
• KStream.transform(TransformerSupplier, String...)

Method Summary

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

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

stores

Method Details

get

ValueTransformer<V,VR> get()

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

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

Returns:

a newly constructed ValueTransformer instance