org.apache.beam.sdk.transforms

Class WithFailures.ThrowableHandler<T>

java.lang.Object

org.apache.beam.sdk.transforms.InferableFunction<InputT,OutputT>

org.apache.beam.sdk.transforms.SimpleFunction<WithFailures.ExceptionElement<T>,KV<T,EncodableThrowable>>

org.apache.beam.sdk.transforms.WithFailures.ThrowableHandler<T>

All Implemented Interfaces:

java.io.Serializable, HasDisplayData, ProcessFunction<WithFailures.ExceptionElement<T>,KV<T,EncodableThrowable>>, SerializableFunction<WithFailures.ExceptionElement<T>,KV<T,EncodableThrowable>>

Enclosing class:

WithFailures

public static class WithFailures.ThrowableHandler<T>
extends SimpleFunction<WithFailures.ExceptionElement<T>,KV<T,EncodableThrowable>>

A handler that holds onto the Throwable that led to the exception, returning it along with the original value as a KV.

Extends SimpleFunction so that full type information is captured. KV and EncodableThrowable coders can be easily inferred by Beam, so coder inference can be successfully applied if the consuming transform passes type information to the failure collection's TupleTag. This may require creating an instance of an anonymous inherited class rather than of this class directly.

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
ThrowableHandler()

Method Summary

Modifier and Type	Method and Description
KV<T,EncodableThrowable>	apply(WithFailures.ExceptionElement<T> f) Returns the result of invoking this function on the given input.

Methods inherited from class org.apache.beam.sdk.transforms.SimpleFunction

fromSerializableFunctionWithOutputType

Methods inherited from class org.apache.beam.sdk.transforms.InferableFunction

fromProcessFunctionWithOutputType, getInputTypeDescriptor, getOutputTypeDescriptor, populateDisplayData

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

ThrowableHandler

public ThrowableHandler()

Method Detail

apply

public KV<T,EncodableThrowable> apply(WithFailures.ExceptionElement<T> f)

Description copied from interface: ProcessFunction

Returns the result of invoking this function on the given input.

Specified by:

apply in interface ProcessFunction<WithFailures.ExceptionElement<T>,KV<T,EncodableThrowable>>

Specified by:

apply in interface SerializableFunction<WithFailures.ExceptionElement<T>,KV<T,EncodableThrowable>>

Overrides:

apply in class SimpleFunction<WithFailures.ExceptionElement<T>,KV<T,EncodableThrowable>>