vertx / io.vertx.reactivex.ext.web.api.contract / DesignDrivenRouterFactory / setValidationFailureHandler

# setValidationFailureHandler

`abstract fun setValidationFailureHandler(handler: Handler<RoutingContext>): DesignDrivenRouterFactory<Any>`

Set default validation failure handler. You can disable this feature from `io.vertx.reactivex.ext.web.api.contract.DesignDrivenRouterFactory#enableValidationFailureHandler`

### Parameters

`handler` -

Return