[OpenSER-Users] presence caching and retrieval

[Klaus Darilion]

http://openser.org/docs/modules/1.3.x/presence#AEN37

Sigrid Thijs schrieb:
> Hi,
> 
> I was wondering, when a SIP user publishes his presence to the openser 
> presence module, is this presence data cached in memory by the server or 
> is this immediately stored in the database?
> 
> Is this somehow configurable?
> 
> If the presence data is cached in memory, is there an interface 
> available for an external server to query the presence of one or more 
> resources?
> 
> In particular, we are looking for a performant way to query the presence 
> of multiple users (for example 20). We would like to avoid the overhead 
> of creating a SIP subscription for each resource:
> - to avoid traffic overhead
> - we only need to know the current presence of the resource(s) and are 
> not interested in future presence changes.
> 
> Do you have any suggestions on if/how this can be achieved with openser?

I think the easiest way is to make a DB query on the presentity table 
and parse the XML body.

regards
klaus