Bob Schellink wrote:
The problem is that if i open "more than one document uploading
window" and press submit at once, eventually a race condition arise
and two documents get registered, breaking the business rule.
Btw it seems as if you want to use Transaction isolation to serialize
the upload requests. If that is the case I don't think transactions is
the ideal way to solve this. Rather synchronize on the session object:
e.g:
public void processDocument(File file, Context context) {
HttpSession session = context.getSession();
// concurrent requests will queue up here
synchronize(session) {
validateDocument(file);
}
}
The above assumes validation is done by an automatic process. If it
requires human intervention or the validation process takes a long
time, you might want to think about using asynchronous requests and
dumping the documents into a Queue to be processed later.
I'm sure there are many other ways to approach the problem as well.
kind regards
bob
