see below.
John Zerbe - Mellon Bank
Information Technology Solutions - Middleware Team
Phone: 412-234-1048 E-Mail:[EMAIL PROTECTED]
> -----Original Message-----
> From: Laird Nelson [SMTP:[EMAIL PROTECTED]]
> Sent: Monday, February 28, 2000 3:00 PM
> To: [EMAIL PROTECTED]
> Subject: Re: Threads question (Concrete examples?)
>
> ----- Original Message -----
> From: Mark Hapner <[EMAIL PROTECTED]>
> > A major objective of EJB is to achieve the creation of a multi-user
> service by
> > implementing single threaded components.
>
> So EJB was never intended to handle parallel workflow, as occurs commonly
> in
> large business systems? Then what good is a session bean?
[Zerbe John W] I believe that the parallel workflow issue is resolved
with the addition of JMS support in the container. (as stated below)
>
> > EJB 2.0 will significantly expand the EJB app domain by adding support
> > for asynchronous invocation (JMS integration).
>
> Which is only half of the problem. EJB will not be complete until it also
> specifies how to "create" threads within user beans in such a way that the
> container still has a handle on them. This is a very simple problem.
[Zerbe John W] Via JMS, you can truly split up the work into seperate
asyncronous pieces of work that each run as seperate transactions.
Your original "request" transaction can end while your seperate operations
are
handled.
>
> > So, the question is not what you can do within your container it is what
> your
> > container can do for you :>). Why should you be worrying about creating
> threads if
> > you can get the container to handle all of that complexity?
>
> Because no container on the market will currently let me do parallel
> asynchronous workflow while still being strictly EJB 1.1 compliant. That
> says more about the specification than the container to me.
>
> Cheers,
> Laird
>
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