+1 for things easier for ARI developers coming from web world
and ... we look forward to "sample speech to text application" :)
have a nice weekend
Marek
Dne 18/10/2019 v 14:55 George Joseph napsal(a):
When we created the External Media addition to ARI we created an
ExternalMedia object to be returned from the channels/externalMedia
REST endpoint. This object contained the channel object that was
created plus local_address and local_port attributes (which are also
in the Channel variables). At the time, we thought that creating an
ExternalMedia object would give us more flexibility in the future but
as we created the sample speech to text application, we discovered
that it doesn't work so well with ARI client libraries that a) don't
have the ExternalMedia object defined and/or b) can't promote the
embedded channel structure to a first-class Channel object.
Example:
A common pattern using the node-ari-client is to create a new Channel
object, attach an event handler to it, then call originate on it like
so...
chan = ari.channels.Channel();
chan.on('StasisStart', <add chan to bridge>);
chan.originate(...);
With the current ExternalMedia API:
chan = ari.channels.Channel();
chan.on('StasisStart', <add chan to bridge>);
chan.externalMedia(...);
This doesn't work however because the return from
channels/externalMedia isn't a Channel. It's an ExternalMedia object
with an chlld object that looks like a Channel but has no Channel
behavior attached to it. The event handler added to chan will never
get called and you can't attach handlers or perform any operations on
ExternalMedia.channel because it's just a plain object, not an
instance of Channel.
Realistically, it doesn't make sense to force client library
implementations to create special logic to promote the
ExternalMedia.channel object into an instance of Channel and since
External Media is a new capability anyway, it seems that the least
painful solution is to remove the ExternalMedia object and have
channels/externalMedia return a Channel object directly, just like
channels/create and channels/originate. As I described above, the
only other attributes of ExternalMedia were the local address and port
and they're already available in the Channel variables anyway.
I would think that this change would make things easier for ARI
developers but I wanted to make sure that you knew about it in advance
and had a chance to comment. There will be a Gerrit review up for
this change later this morning.
Also... I mentioned the "sample speech to text application" above.
It's working and will be published next week.
Comments? Questions?
--
*George Joseph*
Digium - A Sangoma Company | Software Developer | Software Engineering
445 Jan Davis Drive NW - Huntsville, AL 35806 - US
direct/fax: +1 256 428 6012
Check us out at: https://digium.com <https://digium.com/> ·
https://sangoma.com <https://sangoma.com/>
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