RE: [wsbpel] Question: short-lived process for BPEL ?

Hi, Yanming,

 

It is much more than that. You need to be aware
some critical limitations in current BPEL for Telco process. 

 

For example, Telco process is generally “session”
based, and there is no structure or concept of “session” in BPEL. One
fundamental issue related to this is described in Issue 6.2 of current WSBPEL
issue list, i.e. no good control of parallel processes in BPEL. 

 

As a consequence, if a Telco process
started a typical contact session including parallel contact processes, e.g.
phone call + IM, then unless the contact responds successfully in both phone and
IM, which is unlikely and not necessary since one is enough, the BPEL process
can not exit successfully and will result in Fault. But in Telco process, if you
get one response, either phone or IM, the contact session is successfully
completed and the Telco process will move on normally.

 

We hope Issue 6.2 can be addressed properly
in WSBPEL 2.0, and we found it to be one of the most frustrating places of using
BPEL for Telco process. This is a generic issue and applicable to other
applications as well, since controlling parallel processes should be fundamental
in BPEL.

 

You should give it a try. The more we use
BPEL, the more we know where it needs to be improved.

 

---- Wu Chou.

 

Wu Chou,
Ph.D.  | Technical Manager, Dialogue System
Research Group | Avaya | 233 Mt. Airy Road| Rm. 2D34 | Basking Ridge, NJ 07920 | Voice/Fax: 908-696-5198 / 908-696-5401 |  

 

 

-----Original
Message-----

From: Alex Yiu
[mailto:] 

Sent: Friday, August 26, 2005 3:00
PM

To: LI Yanming RD-ILAB-SSF

Cc: ;
Alex Yiu

Subject: Re: [wsbpel] Question:
short-lived process for BPEL ?

 

Hi Yanming,

It depends on various factors: message payload size, web-service I/O nature
(e.g. local call vs remote call), and other QoS parameters related to the
process. (e.g. message reliability). 

In general, I would say yes. 

Regards,

Alex Yiu

LI Yanming RD-ILAB-SSF wrote: 

Hi there,

Sorry for the spam.

 

I need to create
some Telco processes using BPEL, and the features of those process include:

 - very
short-lived ( seconds, or minutes)

 - low latency
(milliseconds)

 - multiple
web services calls

 

Do you think BPEL
can handle such requirements, or any one of your products can handle such
processes?

 

Thanks for your
attention.

 

Yanming Li

France Telecom 

Research & Development San Francisco

Senior Software Engineer 

801
Gateway 

South
San Francisco, CA94080 

Tel:
650-875-1520 

Fax:
650-875-1505 

http://www.francetelecom.com/rd/