Hi,
You could have a session EJB that talks to a singleton. That way you can have multiple
clients accessing your singleton at the same time (in different sessions). Just make
sure your singleton doesn't get garbage collected.
Entity EJB's do not fit in the singleton pattern. You have no control as to when
they're being passivated or activated.
BTW : Aguante Argentina !!! :)
-----Original Message-----
From: Maria Soledad Escobar - Sun Argentina
[mailto:[EMAIL PROTECTED]]
Sent: Friday, March 24, 2000 2:06 AM
To: [EMAIL PROTECTED]
Subject: What should I do if I need a singleton?
Hi all!!!
Say you want a stateful, shared, server-side object, i.e., a singleton.
EJB
does not provide this design pattern explicitly. I could use an entity
bean,
but these are really intended to be stored in either a database or some
(other) legacy backend. Writing a stand-alone entity bean (which
provides
full transactional semantics, as entities should) is overkill for a
simple
singleton. Or, you could use a stateful session bean, but these are
intended
to be single-user. (In reality, it is not possible for a container to
enforce this rule, and thus it could be ignored, but again we find
ourselves
doing something quite unnatural in EJB.)
any suggestions?
Thank you :-)
--
______
/_____/\ Maria Soledad Escobar
/____ \\ \ Systems Engineer
/_____\ \\ /
/_____/ \/ / / Sun Microsystem de Argentina
/_____/ / \//\ Bouchard 547 Piso 26
\_____\//\ / / Buenos Aires (1106)
\_____/ / /\ / Tel: (54) 11-4317-5600
\_____/ \\ \ Fax: (54) 11-4311-8999
\_____\ \\
\_____\/
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