Re: Is JCA approriate?
From: Reinf (me_at_sane.invalid)
Date: 11/04/04
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Date: Thu, 4 Nov 2004 12:01:12 +0800
Hello Lee,
Thanks for your reply!
I fully agree that JCA is a little overkill for this case, so what kind
of tool/framework would you suggest?
The management of multiple broadcast cards involves the following issues:
* Session support: That is, when the user logged in and started the
broadcasting of a specified card, the current
session state shall be stored so that the state could be restored the next
time he logs in. This means that a new session is
created immediately after a user starts the broadcasting of a card. The
session associates the user and the card.
We call this user the (temporary) "owner" of this card(within the session
scope). A user could be the owner of more than
one card.
* Status: A broadcast card could be in two status: Idle, Busy. Idle means
the card is ready, but nobody is using it,
and "Busy" means that card is using(locked) by a specified user.
A card turns from "Busy" to "Idle" when it's owner or the Administrator
stopped the broadcasting, and thus the session ends.
* Permission: When the broadcast of a card is started, no any other user
could stop it, except the Administrator and his owner.
So there will be two-kinds of permissions for the broadcast card:
read-only(View current status) and
write(Transmit data thru the card). Read-only permission is available to all
the users, while write permission is only available to
it's Owner and the Administrator.
Preferably, the framework could also support a list of allow/denied list of
hosts.
Thank you!
----- Original Message -----
From: "Lee Fesperman" <firstsql@ix.netcom.com>
Newsgroups: comp.lang.java.programmer
Sent: Thursday, November 04, 2004 6:42 AM
Subject: Re: Is JCA approriate?
> Reinf wrote:
> >
> > Hello group,
> > I am working on a data broadcasting system(in java) which communicates
with
> > one physical broadcast card via JNI. The system itself is composed of
> > several EJBs and a web interface. And now we are redesigning the system
in
> > order to work with more than one broadcast card, which involves the
> > management of multiple hardware resource.
> > My colleague suggestted the use of JCA(j2ee connector architecture),
and
> > his reason is that JCA includes features like Transaction processing,
resource
> > pool and etc, though it might sounds differrent from what Sun suggested.
> >
> > Do you think JCA is really approriate for this purpose? And your
reasons
> > please.
> > Thank you
>
> The interface you're describing sounds like a device driver style
interface. JCA is
> apparently intended for complex backend software systems, listing database
servers,
> application packages like CRM/ERP and messaging systems.
>
> JCA might be overkill for your situation, but I do think it could be
possibility. It is
> a fairly complicated API, so the question is -- is it worth the effort?
>
> Note: Though JCA provides a standardized transaction interface for
container sofware
> (like, application servers), your software will need to handle the actual
transaction
> processing. JCA also supports distributed transactions, but you must
provide the XA
> implementation as a resource manager.
>
> My JDJ article on JCA might help you make your decision:
> http://sys-con.com/story/?storyid=46283&de=1.
>
> --
> Lee Fesperman, FFE Software, Inc. (http://www.firstsql.com)
> ==============================================================
> * The Ultimate DBMS is here!
> * FirstSQL/J Object/Relational DBMS (http://www.firstsql.com)
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