Hey,
On Mon, Aug 23, 2010 at 8:38 AM, rafael <[email protected]> wrote:
> Thanks a lot for helping me learn more about liquidsoap. It is also
> being a practical school for me to learn more about functional languages
> (should not have missed those classes :) ).
I'm glad I can spread it.
> add_protocol(temporary=true,"myplaylist", fun (_,_) ->
> [get_process_output("python list.py")])
>
> in an imperative language would be analogue to:
>
> myplaylist = get_process_output("python list.py")
Good point, your version, followed by playlist(myplaylist), is
equivalent and simpler. It's still functional, by the way.
> Is this what add_protocol function exists for? Setting variable values?
The point of adding a protocol is to create a new file creation
method. It was pointless in my example unless there is some reloading
of the playlist. With a protocol the reloading triggers a new call to
the python script. With your version the reloading would use the
output of the first and single call of the script.
Back to the practical goal now:
> Also, one of the behaviours I expect (and this is why I used
> request.dynamic in the first place) is to permit someone to change a
> playlist (let's say a jingle folder), just by moving files from and to
> that folder (through ftp, for example).
For that purpose playlist(reload=3600,"/path/to/folder") is good
enough. It takes all files from the folder, and refreshes that list of
files every hour (3600 seconds). If you don't like the ad-hoc delay,
you could also setup a notification-based script that watches for
modifications on the directory and triggers the reloading via a telnet
command.
Cheers,
--
David
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