org.apache.beam.fn.harness

Interface PTransformRunnerFactory<T>

All Known Implementing Classes:

CombineRunners.PrecombineFactory

public interface PTransformRunnerFactory<T>

A factory able to instantiate an appropriate handler for a given PTransform.

Nested Class Summary

Nested Classes

Modifier and Type	Interface and Description
static interface	PTransformRunnerFactory.Context A context used to instantiate and support the handler necessary to execute the PTransform.
static interface	PTransformRunnerFactory.Registrar A registrar which can return a mapping from RunnerApi.FunctionSpec#getUrn() to a factory capable of instantiating an appropriate handler.

Method Summary

Modifier and Type	Method and Description
T	createRunnerForPTransform(PTransformRunnerFactory.Context context) Creates and returns a handler for a given PTransform.

Method Detail

createRunnerForPTransform

T createRunnerForPTransform(PTransformRunnerFactory.Context context)
                     throws java.io.IOException

Creates and returns a handler for a given PTransform. Note that the handler must support processing multiple bundles. The handler will be discarded if bundle processing fails or management of the handler between bundle processing fails. The handler may also be discarded due to memory pressure.

Throws:

java.io.IOException