called when an http request has been received . the default implementation return null means to use the application router to find the appropriate action by overriding this method one can provide an alternative routing mechanism . please note , though , this api is very low level , useful for plugin/module authors only . concode_field_sep PlaceHolder placeHolder concode_field_sep void onStart concode_elem_sep F.Promise<Result> onError concode_elem_sep Action onRequest concode_elem_sep void beforeStart concode_elem_sep F.Promise<Result> onHandlerNotFound concode_elem_sep Class<T>[] filters concode_elem_sep F.Promise<Result> onBadRequest concode_elem_sep Configuration onLoadConfig concode_elem_sep Configuration onLoadConfig concode_elem_sep void onStop
play . api . mvc . Handler function ( RequestHeader arg0 ) { return null ; }