ClassNotFoundException during Rule Validation

[nils-christian]

Hi,

We are getting a ClassNotFoundException while executing a custom rule. Please take a look at the following rule (I simplified the condition):

public static final ArchRule MY_RULE = methods( )
			.should( followMyRule( ) )
			.allowEmptyShould( true );

private static ArchCondition<JavaMethod> followMyRule( ) {
	return new ArchCondition<>( "follow my rule" ) {

		@Override
		public void check( final JavaMethod method, final ConditionEvents events ) {
			final ExceptionHandler exceptionHandlerAnnotation = method.getAnnotationOfType( ExceptionHandler.class );
			if ( exceptionHandlerAnnotation.exception( ).length > 0 || exceptionHandlerAnnotation.value( ).length > 0 ) {
				events.add( SimpleConditionEvent.violated( method, method.getFullName( ) ) );
			}
		}
	};
}

The ExceptionHandler annotation is imported from spring-web 7.0.3.

Validating the rule with the following two domain classes leads to the mentioned exception.

public class MyException extends RuntimeException {
	public MyException( String message ) {
		super( message );
	}
}

public class MyClass {

	@ExceptionHandler( { MyException.class } )
	private void handleMyException( final MyException exception ) {
	}

}

This is the corresponding stack trace:

Caused by: org.apache.maven.plugin.MojoFailureException: ArchUnit Maven plugin reported architecture failures listed below :Rule Violated - org.example.MyRules
java.lang.ClassNotFoundException: org.example.MyException
at com.societegenerale.commons.plugin.maven.ArchUnitMojo.execute (ArchUnitMojo.java:114)
at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo (DefaultBuildPluginManager.java:126)
at org.apache.maven.lifecycle.internal.MojoExecutor.doExecute2 (MojoExecutor.java:328)

It does not occur when using a build-in exception (e.g. NullPointerException) and the execution via the plain ArchUnit API does not raise an exception either.

final ClassFileImporter classFileImporter = new ClassFileImporter( );
final JavaClasses javaClasses = classFileImporter.importClasses( MyClass.class, MyException.class );

final EvaluationResult evaluationResult = MyRules.MY_RULE.evaluate( javaClasses );
evaluationResult.handleViolations( ( final Collection<JavaMember> violatingObjects, final String message ) -> System.out.println( violatingObjects ) );

Thus I assume that the issue is somehow located in the ArchUnit Maven plugin.

Thank you and best regards

Nils