Web transaction token functionality

[klr8]

How about adding a utility class (bean) to Spring offering functionality similar to the TokenProcessor class Struts has (http://svn.apache.org/viewcvs.cgi/st...89&view=markup)?

Or is there another simple, general way to prevent double submits in Spring?

Erwin

[katentim]

...general way to prevent double submits in Spring?

See http://forum.springframework.org/showthread.php?t=10393

functionality similar to the TokenProcessor class Struts

If your interested serializing parallel invocations from the same client, see:
setSynchronizeOnSession method of org.springframework.web.servlet.support.WebContent Generator.

[klr8]

Given this "synchronizeOnSession" functionality, I guess Spring is suffering from Struts bug #19223 (http://issues.apache.org/bugzilla/show_bug.cgi?id=19223)?

Erwin

[katentim]

The Servlet 2.3 spec. says

J2EE.7.7.1 Threading Issues
Multiple servlets executing request threads may have active access to a single
session object at the same time. The Developer has the responsibility for
synchronizing access to session resources as appropriate.

I know it doesn't help you, but this suggests that the bug is in the container.

[mbienstein]

I solved a similar issue with code like this:

synchronized(session.getId().intern()) {

}

This will not work in a clustered environment where one user can be sent back to different VMs (but no synchronization in the JVM will).

Michael