Iain (the lead developer on Jive Messenger) is out on vacation, but I’'ll attempt to answer your questions.
First, I’‘m glad to hear that your experience with Smack has been a good one. The same general approach of creating a simple yet powerful system has been taken with Jive Messenger. However, it’‘s likely that in order to achieve all the customizations you’‘re looking for, you’'d need to use the upcoming 1.1 release.
- Allow different “types” of users. Some users
should be able to browse the available users, some
Is there a specific JEP you want support for, or would this be a custom JEP?
- Interact with paypal’'s payment notifications to
create new users, then email them back the details.
This should be very possible since the user creation and authentication pieces in the server are pluggable. If you provide some more details about how the Paypal interaction would work, we could suggest some approaches for implementing it. Also, this is something that the 1.1 release will help with – doing user and auth integrations is quite a bit easier.
- Allow offline messages, and multiple recipients
per message (this is for the case of sending in-band
serialised objects which are large).
Messenger suports offline messaages and you can also specify a max size of stored messages. As far as I know, it’‘s not possible in XMPP for a message to have multiple recipients. Therefore, you’'d need to send the same message once for each person.
Also, we still need to do some work in Smack in order to support IBB. I believe you’'ve posted in the Smack forums about this?
Are any of these features available, or hard to
implement? Where would I start with messenger?
All of these customizations should be possible, especially using the 1.1 release. I would recommend downloading messenger 1.0.8 so that you can become generally familiar with the system. When a 1.1 beta release is available (likely in a few weeks?) you could begin actual integration work. Iain will also be able to provide some more specific development advice when back from vacation.