Sacha Labourey wrote:
>
> This does not seem to fit in the EJB concept. Am I wrong?
>
Currently, no. JMS in the upcoming 2.0 spec should be what you need.
> How to implement these call-back and server background processing with the
> EJB?
>
You could have the client register itself as an RMI object, pass itself
along (thus being converted into a stub), then have the EJB call a
service passing the stub along as a parameter, and then return
immediately. The service that performs the actual work (eg downloads the
file) would then call the client through RMI when it is done:
client EJB stub service
| | |
| foo() | |
|------>| | bar() |
| |------------->|
| | |
| |
Call has returned to the client.
The service now performs the actual work (timed, new thread in bar() or
whatever).
| |
| | |---
| | | | baz()
| | |<--
| | |
| | done()|
| done() |<------|
|<-------------|
| |
Hope it helps somewhat. Let me know if I'm talking garbage, guys.
Regards,
/Kalle
--
Karl-Fredrik Blixt
Computer Science Engineer
Homepage: http://www-und.ida.liu.se/~karbl058
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