[OpenSIPS-Users] async and event handlers

[Liviu Chircu]

Hi, John!

Some answers below:

> My question is this: Can I use async() or launch() as a wrapper for a
> cache_store() function call made from within an event handler?
Calling async() or launch() from an event handler SHOULD work (see 
below).  Unfortunately, the "cache_" family of functions do not have 
async support.
> Is there any
> advantage to doing so or can I regard event handlers as a safe place to
> initiate blocking operations because, I assume, events must already have
> their own queue.

This is where it gets interesting -- in many cases, which include the 
usrloc save() operation, the event handlers are ran inline with the SIP 
processing, by the same process!  So performing a blocking operation in 
that context still has the unpleasant potential to bog down your SIP 
processing responsiveness/latencies.

Liviu Chircu
OpenSIPS Developer
http://www.opensips-solutions.com