[OpenSIPS-Users] Support for Asynchronous operations in script

[Bogdan-Andrei Iancu]

Hello all,

I'm glad to let you know that a new feature is now available in OpenSIPS 
2.1 devel : the ability to perform, from script level, various 
operations in the *asynchronous* mode.

That's it: bye, bye I/O blocking !! Now you can run DB queries, REST 
queries or external scripts without the blocking penalty !

The OpenSIPS config file allows you to use certain functions in async 
way (via a dedicated statement). The suspending and resuming is done at 
script level. A detailed description of how the async support works in 
2.1 is available here:
     http://www.opensips.org/Documentation/Script-Async-2-1

The async scripting support is just the tip of the iceberg (when comes 
to the work which has been done). To make this possible, radical changes 
were implemented in OpenSIPS 2.1 (most of them imported from OpenSIPS 
experimental branch):
     - per-process I/O reactors
     - timer jobs dispatched across all SIP workers (versus dedicated 
timer procs)
     - updatable transactions in TM (to be able to use the transactions 
as contexts for the async jump)
     - transaction based async support in TM module
     - processing context (to make it easier to suspend and resume the 
script execution)

And finally, the first modules providing async functions:
     - avpops for DB queries
     - exec for script execution
     - rest_client for REST queries

Step by step, we will migrate all the functions performing I/O ops to 
the async support.

The async support is still in beta, it still needs to be heavily tested, 
so any feedback and help from your side will be greatly appreciated.

In the meanwhile, welcome to the OpenSIPS Async World :)

Best regards,

-- 
Bogdan-Andrei Iancu
OpenSIPS Founder and Developer
http://www.opensips-solutions.com

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