org.apache.giraph.job

Class GiraphConfigurationValidator<I extends org.apache.hadoop.io.WritableComparable,V extends org.apache.hadoop.io.Writable,E extends org.apache.hadoop.io.Writable,M1 extends org.apache.hadoop.io.Writable,M2 extends org.apache.hadoop.io.Writable>

java.lang.Object

org.apache.giraph.job.GiraphConfigurationValidator<I,V,E,M1,M2>

Type Parameters:

I - the Vertex ID type

V - the Vertex Value type

E - the Edge Value type

M1 - the incoming Message type

M2 - the outgoing Message type

public class GiraphConfigurationValidator<I extends org.apache.hadoop.io.WritableComparable,V extends org.apache.hadoop.io.Writable,E extends org.apache.hadoop.io.Writable,M1 extends org.apache.hadoop.io.Writable,M2 extends org.apache.hadoop.io.Writable>
extends Object

GiraphConfigurationValidator attempts to verify the consistency of user-chosen InputFormat, OutputFormat, and Vertex generic type parameters as well as the general Configuration settings before the job run actually begins.

Constructor Summary

Constructors

Constructor and Description
GiraphConfigurationValidator(org.apache.hadoop.conf.Configuration conf) Constructor to execute the validation test, throws unchecked exception to end job run on failure.

Method Summary

Modifier and Type	Method and Description
void	validateConfiguration() Make sure that all registered classes have matching types.

Methods inherited from class java.lang.Object

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

Constructor Detail

GiraphConfigurationValidator

public GiraphConfigurationValidator(org.apache.hadoop.conf.Configuration conf)

Constructor to execute the validation test, throws unchecked exception to end job run on failure.

Parameters:

conf - the Configuration for this run.

Method Detail

validateConfiguration

public void validateConfiguration()

Make sure that all registered classes have matching types. This is a little tricky due to type erasure, cannot simply get them from the class type arguments. Also, set the vertex index, vertex value, edge value and message value classes.