Maybe I'm being dense here but:
If every session contains a reference to the bean, and every thread is
synchronizing on their own session;
It would seem that there would not be any concurrency control.
I would think that they all need to sync on the same object.
JC
"Kalra, Ashwani"
<[EMAIL PROTECTED] To: "Struts (E-mail)"
<user@struts.apache.org>
gemini.com> cc:
Subject: concurrency problem
04/08/2005 06:10
AM
Please respond to
"Struts Users
Mailing List"
I am facing concurrency problem in following scenario.
All our action classes call same stateful session bean . Each action class
obtains the reference from HTTPSession object and calls one and only one
business method.
To prevent the concurrent access to this instance which occurs when user
immediately presses two links quickly in succession I am using the
following code block
execute(...) //execute methods of Action class
{
....
....
//Obtain the session from Request.User will always be in session here
session=request.getSession()
Synchronised(session)
{
//call ejb's business method.
}
}
However sometimes more than one thread is able to pass through, And I get
exception from Appserver. As 2 threads are not allowed for statefull
Session bean.
Can there be problem in above code. Is it ok to synchronise on session
object.
Thanks & Regds
Ashwani
Ext: 1860
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