Re: [JDEV] priority question

[Casey Crabb]

In my answers here I'll assume you are talking about a transport component dealing with a JID from multiple resources. These answers are my opinion only.

Here's a couple of the questions I'm wondering

- What is the behavior when a lower-priority resource changes presence?

The presence broadcast through the transport is always the presence of the resource with highest priority. If a resource with lower priority changes status, nothing changes on the transport side.


- What is the behavior when a lower-priority resource changes to the highest priority, or vice-versa? (keep in mind that some clients change priority when they go auto-away, and any presence change within a priority level makes that client have the highest priority)

Again, the primary presence broadcast should be the presence of the resource with highest priority.

- What is the behavior when the highest-priority resource logs out? (I'm assuming a lower-priority resource is ignored)

The transport looks for the resource with next-highest priority and transmits it's presence if it is different from the presence of the resource that just logged out.


- How should invisible mode interact, in both the case where the remote system does and does not support invisible mode?

In the case where it does support invisible:
Broadcast the presence of the resource with the highest priority.

In the case where it does not support invisible:
(this one I'm not quite sure about)
Broadcast unavailable, even if lower priorities have non-invisible status.

- What is the correct behavior when a message is sent from a resource which is not the highest priority?

Replies should always go to the resource from which they were sent, that said it is difficult to determine if something is a reply through a transport. Therefore I would suggest the following:

if a message from [EMAIL PROTECTED]/lowpriority is sent to a [EMAIL PROTECTED] Then a message coming from [EMAIL PROTECTED] to [EMAIL PROTECTED] would go to [EMAIL PROTECTED]/lowpriority under the following conditions:
Only a small amount of time from the original message to the 'reply' has elapsed
[EMAIL PROTECTED]/lowpriority is still available.

otherwise it would go to the resource with highest priority.

Messages coming from all other aim users to [EMAIL PROTECTED] will go to the resource with highest priority.



I hope I was clear enough to understand.

--
Casey