org.apache.beam.sdk.transforms

Class WithFailures.ExceptionAsMapHandler<T>

java.lang.Object

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

org.apache.beam.sdk.transforms.SimpleFunction<WithFailures.ExceptionElement<T>,KV<T,java.util.Map<java.lang.String,java.lang.String>>>

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

All Implemented Interfaces:

java.io.Serializable, HasDisplayData, ProcessFunction<WithFailures.ExceptionElement<T>,KV<T,java.util.Map<java.lang.String,java.lang.String>>>, SerializableFunction<WithFailures.ExceptionElement<T>,KV<T,java.util.Map<java.lang.String,java.lang.String>>>

Enclosing class:

WithFailures

public static class WithFailures.ExceptionAsMapHandler<T>
extends SimpleFunction<WithFailures.ExceptionElement<T>,KV<T,java.util.Map<java.lang.String,java.lang.String>>>

A simple handler that extracts information from an exception to a Map<String, String> and returns a KV where the key is the input element that failed processing, and the value is the map of exception attributes.

Extends SimpleFunction so that full type information is captured. Map and KV coders are well supported by Beam, so coder inference can be successfully applied if the consuming transform passes type information to the failure collection's TupleTag.

The keys populated in the map are "className", "message", and "stackTrace" of the exception.

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
ExceptionAsMapHandler()

Method Summary

Modifier and Type	Method and Description
KV<T,java.util.Map<java.lang.String,java.lang.String>>	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

ExceptionAsMapHandler

public ExceptionAsMapHandler()

Method Detail

apply

public KV<T,java.util.Map<java.lang.String,java.lang.String>> 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,java.util.Map<java.lang.String,java.lang.String>>>

Specified by:

apply in interface SerializableFunction<WithFailures.ExceptionElement<T>,KV<T,java.util.Map<java.lang.String,java.lang.String>>>

Overrides:

apply in class SimpleFunction<WithFailures.ExceptionElement<T>,KV<T,java.util.Map<java.lang.String,java.lang.String>>>