[SR-Users] Operations after relay

[Daniel-Constantin Mierla]

Hello,

for a request, t_relay() usually sends out immediately (especially if it
is over UDP), so any operation after t_relay() doesn't add delays, but
it can lower routing capacity if the operation is taking long time, so
it is still good to do some async variant.

There is no "t_relay()" option for reply processing, so replies are sent
out once finishing executing on/reply_route blocks.

Cheers,
Daniel

On 11.06.19 17:41, Nicolas Breuer wrote:
> Hi Daniel,
>
> I will try doing on event_route => dialog start.
> It will not cause any issues with the relaying 😊
>
>
> -----Message d'origine-----
> De : Daniel-Constantin Mierla <miconda at gmail.com> 
> Envoyé : mardi 11 juin 2019 12:15
> À : Kamailio (SER) - Users Mailing List <sr-users at lists.kamailio.org>; Nicolas Breuer <Nicolas.Breuer at belcenter.biz>
> Objet : Re: [SR-Users] Operations after relay
>
> Hello,
>
> if you don't need to handle the response from the sql operations, then
> look also at the async sql query:
>
>   -
> https://www.kamailio.org/docs/modules/stable/modules/sqlops.html#sqlops.f.sql_query_async
>
> Cheers,
> Daniel
>
> On 10.06.19 20:01, Nicolas Breuer wrote:
>> Thanks Alex.
>> I will have a look on your suggestions
>>
>>
>>> Le 10 juin 2019 à 19:59, Alex Balashov <abalashov at evaristesys.com> a écrit :
>>>
>>>> On Mon, Jun 10, 2019 at 06:01:19AM +0000, Nicolas Breuer wrote:
>>>>
>>>> I want to do some sql operations after a 200 reply, after relaying the
>>>> sip packet Is it possible or sending the sip packet is the last
>>>> operation permitted ?
>>> Hi, 
>>>
>>> Sending the SIP packet is an implicit operation that occurs after all
>>> hooks which can intercept a reply (i.e. onreply_route) have been fired.
>>> Therefore, you should be careful that your SQL operations do not block
>>> the message worker thread that is processing the reply. If you think
>>> they might be overly latent, there are some ways around that. 
>>>
>>> Aside from that, there should be no problem with executing SQL
>>> operations at the time that you intercept a 200 reply in an
>>> onreply_route. Do note, however, that the reply is not going to get
>>> relayed until all your operations are done. If what you were asking is
>>> whether there is a way to defer those SQL operations until after the
>>> reply has already been relayed, the answer is yes, but not entirely
>>> straightforwardly (have a look at the 'mqueue' and 'rtimer' modules).
>>>
>>> -- Alex
>>>
>>> -- 
>>> Alex Balashov | Principal | Evariste Systems LLC
>>>
>>> Tel: +1-706-510-6800 / +1-800-250-5920 (toll-free) 
>>> Web: http://www.evaristesys.com/, http://www.csrpswitch.com/
>>>
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-- 
Daniel-Constantin Mierla -- www.asipto.com
www.twitter.com/miconda -- www.linkedin.com/in/miconda