liviu at opensips.org
Fri Aug 21 15:12:24 EST 2020
On 20.08.2020 09:37, Darpan Patel wrote:
> But in my case after 40 seconds it's not trigger resume_call route, so resume_call only called after the event will succeed ? I want to implement a feature like if callee is not registered till 40 seconds then relay call to PSTN Gateway .thanks alot in advance .
> regards ,
> Darpan Patel
From how I recall the code, async() statements have no timeout. So
that async(wait_for_event()) will be stuck forever until that
registration arrives -- I may be wrong here, maybe Bogdan can offer more
clarifications as he delivered some work on supporting async statement
timeouts roughly 6 months ago.
Alternatively, I suggest a simpler solution, which will actually be
"as long as the lookup() keeps failing due the user still being
offline, keep doing
async(sleep(1 second), route_lookup_user). Start with an $avp()
value of 40 and
keep decrementing it, so you know when to give up doing those
after 40 decrements (seconds)."
Reasons why this close to optimal:
* usrloc lookup() operations are hyper-optimized, since all AoRs are
held in an AVL tree which sits in a wide hash. The lookup cost is
* async(sleep()) is safe & straight-forward. It will also help you
maintain a high throughput (thousands of CPS)
* the user experience will be quite OK, with the caller receiving the
call 1 second after the registration, on the worst case
www.twitter.com/liviuchircu | www.opensips-solutions.com
OpenSIPS Summit 2020 Distributed
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