Here is something that I wonder about. There are session beans as referred to below
and
there are also ejb session beans. Ejb session beans should only be accessed by one
client at a time (which I assume means one thread). Often session beans call on ejb
session beans. But since session beans might be call by more then one thread at a time
you shouldn't do that.
So how can ejb session beans be used from a session bean?
Hans Bergsten wrote:
> Jari Worsley wrote:
> >
> > Session scope beans are available to a user and their browser session (I'm 99% sure
> > that one session corresponds to connection from one browser program).
> > So if a user has two browser windows open accessing pages on your site, then they
> > can potentially create simultaneous requests that access the same bean in session
> > scope. So session beans need to be thread safe.
>
> Actually, one session corresponds to a set of requests from the same client within a
> certain period of time (the connection between the client and server may be
> closed and reopened, but the session remains).
>
> But yes, a user with multiple browser windows can cause multiple requests
> within the same session. Other cases are when you use frames where the
> content of each frame is from a JSP page; the browser will request all frames
> at roughly the same time so you have multiple requests in the same session.
> And another is a user that keeps hitting the Submit button before the response
> is delivered; every time a new request is made but the previous request may
> still be executing.
>
> Hans
>
> > > I don't understand why beans with session scope should be thread safe.
> > > Could you explain this more in depth ? (With an example if possible ?)
> > >
> > > Thanks in advance,
> > >
> > > Peter Collette
> > >
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> --
> Hans Bergsten [EMAIL PROTECTED]
> Gefion Software http://www.gefionsoftware.com
>
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