org.apache.beam.runners.direct

Interface TransformEvaluator<InputT>

Type Parameters:

InputT - the type of elements that will be passed to processElement(org.apache.beam.sdk.util.WindowedValue<InputT>)

public interface TransformEvaluator<InputT>

An evaluator of a specific application of a transform. Will be used for at least one DirectRunner.CommittedBundle.

Method Summary

Modifier and Type	Method and Description
TransformResult<InputT>	finishBundle() Finish processing the bundle of this TransformEvaluator.
void	processElement(WindowedValue<InputT> element) Process an element in the input DirectRunner.CommittedBundle.

Method Detail

processElement

void processElement(WindowedValue<InputT> element)
             throws Exception

Process an element in the input DirectRunner.CommittedBundle.

Parameters:

element - the element to process

Throws:

Exception

finishBundle

TransformResult<InputT> finishBundle()
                              throws Exception

Finish processing the bundle of this TransformEvaluator.

After finishBundle() is called, the TransformEvaluator will not be reused, and no more elements will be processed.

Returns:

an TransformResult containing the results of this bundle evaluation.

Throws:

Exception