On Thursday, Aug 7, 2003, at 14:25 US/Pacific, Ruggiero, Kevin D. wrote:
> However, I have an ASP.NET application that I'm using to do this same
> thing,
> and state is NOT preserved between calls- and I don't understand why.
See my other email - Web Services are essentially stateless. Every time
you call a Web Service, it creates a new instance of the component that
gets called.
> Is there a way to make my CFC preserve its state between calls from my
> .NET
> application? I'm totally stuck here.
What you need is to have a Web Service that is actually a Session
Fa�ade and then to manage your underlying component's state through
that. In essence, your Web Service component would cache an instance of
the 'real' component in some sort of session-based scope and use that
to execute each actual call.
The next issue is how you maintain 'session' over multiple calls to a
Web Service. There's a number of ways to this but the simplest way is:
- have a WS method you call to initiate a 'session' and it:
- allocate a UUID
- creates an instance of the 'worker' component
- stores it in application.wsSession[uuid]
- returns the uuid
- pass the UUID into each WS method
- method retrieves application.wsSession[uuid]
- calls worker method on that object
- returns result
Then you need a scavenger that cleans up (so the initialization should
probably also store timestamps with the objects and a scheduled task
can delete them from the application.wsSession array).
Of course, if you've got a way to maintain J2EE session (jsessionid
cookie) you could use that and plain ol' session scope (Flash lets you
do this via Flash Remoting for example).
Sean A Corfield -- http://www.corfield.org/blog/
"If you're not annoying somebody, you're not really alive."
-- Margaret Atwood
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