Re: several responses from same webservice?

From: Davey (david.mcshane_at_terminalfour.com)
Date: 10/28/04 

Date: 28 Oct 2004 03:51:28 -0700

Hi Dino,
yes, the polling approach would work for the reporting alright.
The idea of having both apps with a webservice could also be an good
enough solution (although it might be a bit longwinded). I think it
might be wasteful for the server app to connect to the client
webservice and send data for every event.

So I was thinking something like this might be better.
1 - A client uses a webservice to notify the server app that it wants
START to do reports on events coming into the server. The server app
responds stating that it is in report mode.
2 - The server then collects information on incoming events
3 - Then every minute (if there are any events) it connects to the
clients webservice and passes this information to it.
4 - At any stage the client app can call the servers webservice to
STOP sending events.

Remoting sounds good aswell but i've only started reading about it.
Think I need to read more about both technologies!

Thanks guys, Its good to know we have a few options.
:)
Dave

"Dino Chiesa [Microsoft]" <dinoch@online.microsoft.com> wrote in message news:<eFF$1sDvEHA.3748@TK2MSFTNGP10.phx.gbl>...
> there is a WS-Eventing spec that covers this model of communication, but it
> is just a spec, not implemented and available in the framework yet.
>
> the downside with the use of remoting is that it is a non-standard model.
>
> since your client "waits for responses" from the server anyway, there are
> two approaches worth exploring: one is the polling mechanism. when the
> client wants more data, it should just ask, "any more for me?" and the
> server can hand it over.
>
> else, the client itself can expose a webservice interface, and the server
> can call it back. there are examples of this, using cassini. the client
> and server then act more as peers. both can initiate the dialog.
>
>
>
> "Davey" <david.mcshane@terminalfour.com> wrote in message
> news:791b99c2.0410270030.1b2a5f58@posting.google.com...
> > Hi Alex,
> > Thanks for the reply. Yes,I wasnt sure if web services were built for
> > that kind of scenario. I'll look into remoting. Thanks again.
> > Dave
> >
> >
> > "Trebek" <alextrebek@intheformofaquestion.com> wrote in message
> > news:<AOyfd.710$b%5.305@fe37.usenetserver.com>...
> >> Dave,
> >>
> >> I would say this is a better candidate for remoting vs a webservice. Web
> >> services really don't offer much with regard to 'persistent' connections
> >> since it really is simple http request/response under the soap covers.
> >> You
> >> usually have to establish some sort of polling architecture if you want
> >> to
> >> drive things from the client. You can always host your remote object in
> >> IIS. It's very simple and would offer you much of the same web service
> >> benefits.
> >>
> >> Alex
> >>
> >>
> >> "Davey" <david.mcshane@terminalfour.com> wrote in message
> >> news:791b99c2.0410260051.658710fa@posting.google.com...
> >> > hi there
> >> > Im new to webservices and I think they can help solve a communication
> >> > problem.
> >> > We are designing a system that will have a core server type
> >> > application and several client applications.
> >> > The core application will have a webserver bolted on so all the client
> >> > apps can communicate with it.
> >> > Each of the client apps will only ever use one of the webservices
> >> > available.
> >> >
> >> > Once a request is made to the webservice, there may be several
> >> > responses to that cient app,each sending the same type of information.
> >> > This is because the client is doing reports on the information from
> >> > the server app.
> >> > The server app cannot do the reports.

> >> >
> >> > So my questions are:
> >> > Can I have an application connect to a webservice and recieve several
> >> > responses? i.e. can i have it sit and wait for responses
> >> > Can I send a cancel request after the webservice has provided enough
> >> > information?
> >> > Should we use webservices?
> >> >
> >> > The main reason we want to use webservices is that we have some older
> >> > apps in c++ that we want to integrate with the new ones.
> >> > :)
> >> >
> >> > Any help would be great
> >> > Thanks
> >> > Dave

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