architecture related for web service

[=?Utf-8?B?VmlyYWw=?=]

I want to work on request-response model. My problem is i want to call web
service from PDA. This web service creates one xml file in one particular
folder. Another system (application) reads this xml file (as request) and
gives output in another folder (again in the form of xml file). Now my
problem is how do i make sure that call to web service will wait untill
response is received.

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Re: architecture related for web service

=?Utf-8?B?VmlyYWw=?= <Viral@discussi ons.microsoft.c omwrote in
news:14C4C251-31BD-4DF3-B657-BE3979294117@mi crosoft.com:

I want to work on request-response model. My problem is i want to call
web service from PDA. This web service creates one xml file in one
particular folder. Another system (application) reads this xml file
(as request) and gives output in another folder (again in the form of
xml file). Now my problem is how do i make sure that call to web
service will wait untill response is received.

You would make an asynchronous web service call. The call will return
whenever the webserivce decides to send data. Problem is... your client may
wait a long long time. Since you're building this system for a PDA... I'm
guessing your users don't want to wait more than a couple seconds.

However does your system necessarily need to drop an XML file for the
request? Was this by design? Couldn't you talk to both systems using web
services?