Re: Asynchronous Transfer of Control in SOA (Web Service)

"Kaushal Mehta" <KaushalMehta@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote in message
news:5CB4ED96-08D9-436C-9D9D-8A757977C9D9@xxxxxxxxxxxxxxxx
Hi John,

Yeah. This is sort of thing I am looking for. But it is still incomplete.

I was thinking about this concept from point of view of Embedded Systems
expecially RealTime Embedded Systems where there is need to support
asynchronous transfer of control.

So far Asynchronous Transfer of Control is supported by Ada and Real Time
Java Specification (best of my knowledge).

In addition to asynchronous web services, I also want something that could
stop the thread of execution at the server if required. Similar to Timer
example I gave earlier.

So, coming again to it. If we have Timer Web Service as Server. The timer
should act accordingly to the client requirements. Like start, stop the
timer
and then fire the timeout event back to client. Consider same calculation
example that I gave earlier. Also, suppose I have 5 clients, then each one
of
them should have different instance of timer assigned for themselves. I
mean
5 clients would have 5 dedicated timers to themselves which they can use
at
their disposal.

Can something like this be possible ?

Anything is possible; some things are just more likely than others.

I don't think you're going to find Web Services useful to you. Web Services
are really not designed for realtime scenarios.

In a 30-year career, I've done many things - but realtime and process
control are two of those I've never touched, so I won't give you much more
advice. I'll only say that web services were designed for uses cases with
broad use. You, on the other hand, have a very narrow, rare, requirement.
From this point of view, I doubt that there is a reliable, fully-functional
way to do this with web services.

If you want such a mechanism, you may have to create it yourself.
--
--------------------------------------------------------------------------------
John Saunders | MVP - Windows Server System - Connected System Developer


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