[Kamailio-Devel] important: transformations moved from core to pv module

[Daniel-Constantin Mierla]

Hello,

the pseudo-variable and transformation framework in core has been 
completed for upcoming v1.5.0 of Kamailio (OpenSER). The core has now 
only API to register, parse name, evaluate and set values for PV&T.

All specific implementations have moved to PV module:
http://kamailio.org/docs/modules/devel/pv.html

The current architecture provides a flexible way to enhance the number 
PV&T available in config file without affecting the stability and the 
performance of core and main modules. As this number increased a lot, 
and will grow more, the API changed the indexing from a list to a hash 
table, offering faster lookup and quicker shorter up time.

With this work done, a new functionality is available for developers:
- they can export new transformations from their module.
As example, check the pv or textops (new transformation to be announced 
in separate message) modules. The system is simple, you have to 
implement a function to parse the name of transformation and its 
parameter, plus a function to evaluate a transformation.

Now core got some clean up, not that fat anymore, implementation of 
about 100 pseudo-variables and over 30 transformations was moved out 
(couple of thousands lines of code). This work is part of the efforts to 
increase the stability, performance and flexibility of the core, so that 
specific implementations do not affect typical use cases.

As final note, remember to load the pv module from now on if you work 
with/need old core pseudo-variables or transformations.

Cheers,
Daniel

-- 
Daniel-Constantin Mierla
http://www.asipto.com