_requestHandlerKey = AjaxFileUploadRequestHandler.REQUEST_HANDLER_KEY;
if (!_requestHandlerRegistered) {
synchronized (AjaxFileUpload.class) {
if (!_requestHandlerRegistered) {
if (WOApplication.application().requestHandlerForKey(AjaxFileUploadRequestHandler.REQUEST_HANDLER_KEY) == null) {
WOApplication.application().registerRequestHandler(new AjaxFileUploadRequestHandler(), AjaxFileUploadRequestHandler.REQUEST_HANDLER_KEY);
}
_requestHandlerRegistered = true;
}
}
}