Re: SingleThreadModel and Synchronization.

[Diego Sabaris]

Thanks for the javascript code, it works perfect for forms, for hrefs you should call it within the onClick method.

 <a href="..." >

 

Anyway. We've implemented our own "SingleThreadModel" to queue all the request but only per user and it works pretty good. We are using a reentrant lock and we check it within service() method of the servlet we want to prevent start processing newer requests of the same user. It is cool and easy to understand:

 

if (mtx == null) {
     mtx = new ReentrantLock();
     httpSession.setAttribute(ATTR_SESSION_MUTEX, mtx);
}

try {
    if (!mtx.attempt(20000)) {
        showTimeOutMessage(httpServletRequest, httpServletResponse);
        return;
    }

    super.service(req, res);
}
catch (InterruptedException e) {
    Thread.currentThread().interrupt();
    showTimeOutMessage(httpServletRequest, httpServletResponse);
}
finally {
    mtx.release();
}

I would add it to the specification cause SingleThreadModel by itself is almost useless.

 

Best Regards.

Diego.