is actionservlet thread safe

ActionServlet is controller in Model View Controller design pattern for web applications.

ActionServlet is not thread safe
There is only a method named getRequestProcessor is synchronized.

Code of this method is below :-

/**

* <p>Look up and return the {@link RequestProcessor} responsible for the

* specified module, creating a new one if necessary.</p>

*

* @param config The module configuration for which to

* acquire and return a RequestProcessor.

*

* @exception ServletException if we cannot instantiate a RequestProcessor

* instance

* @since Struts 1.1

*/

protected synchronized RequestProcessor getRequestProcessor(ModuleConfig config)

throws ServletException {

// :FIXME: Document UnavailableException?

RequestProcessor processor = this.getProcessorForModule(config);

if (processor == null) {

try {

processor =

(RequestProcessor) RequestUtils.applicationInstance(

config.getControllerConfig().getProcessorClass());

} catch (Exception e) {

throw new UnavailableException(

"Cannot initialize RequestProcessor of class "

+ config.getControllerConfig().getProcessorClass()

+ ": "

+ e);

}

processor.init(this, config);

String key = Globals.REQUEST_PROCESSOR_KEY + config.getPrefix();

getServletContext().setAttribute(key, processor);

}

return (processor);

}