[sr-dev] Dialplan extension with redis backend

Daniel-Constantin Mierla miconda at gmail.com
Tue Apr 10 22:49:57 CEST 2012


Hello,

do you want to use redis as a replacement for storing the dialplan rules 
in shared memory?

Or just a replacement for the storage backend? So the rules are loaded 
from redis to shared memory.

Cheers,
Daniel

On 4/10/12 1:36 PM, Javier Gallart wrote:
> Hello all
>
> we've been thinking of extending the dialplan module for using redis 
> as its backend. These are our thoughts of how we to use it.
> For a regular sql backend, each table has 4 main fields:
> dpid,match_exp,subst_exp,repl_exp
> dpid is given as argument to the only function exported by the module 
> (dp_translate). There are two additional arguments to the function, 
> the source variable upon which the lookup and translation are to be 
> performed and the variable where the transformation will be stored. 
> There are no tables/rows in redis, so the approach we were thinking 
> -there are many- was using a hash for each pair (dpid,match_exp).
> An example might help:
> Let's say we have this row in potsgres:
> dpid|match_exp|subst_exp|repl_exp
> 1  | ^34 | ^34(.*) | \1
>
> According to this approach it would translate into this redis structure:
> key = 1:^34
> field 1 name = subst_exp ; value = ^34(.*)
> field 2 name = repl_exp ; value = \1
>
> The field names could be configurable as module parameters, and we 
> could add "redis" and driver in the dburl parameter.
>
> It would be great to now the opinions of the list about this approach, 
> since there are several other ways to accomplish this:
>
> -"by hand" from the kamailio script
> -LUA
> -Implementing a new module
>
> We would be happy to implement it once there is an agreement on how to 
> proceed. As far as I see it, several modules could be extended in a 
> similar way.
>
> Thanks in advance
>
> Javi
>
>
>
>
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-- 
Daniel-Constantin Mierla
Kamailio Advanced Training, April 23-26, 2012, Berlin, Germany
http://www.asipto.com/index.php/kamailio-advanced-training/

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