[chef-dev] Open source Chef Server API: big changes in internal code is coming ?

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Hello,

We were planning to :
- modify the base source code of the Open Source Chef REST API
- use the internal source code of the Open Source Chef REST API in a Rack
middleware

But then, we have read that Opscode plan to do big changes in the code bases 
of
Chef Server (see below the references), for exemple, switching from Ruby to
Erlang.

So we are afraid that we will have to redo our work based on the actual chef
source code in some months.

Could you please give more information about the plan changes in code base ?
for example:
will the "chef-server-api\app\controllers" source code be totaly changed ?
if we write ruby code based on open source code of Chef, until when will it be
usable ?

We are now thinking that we should only program based on REST API through HTTP
( initially we wanted to bypass the HTTP and authentication layer).

Thanks in advance for your feedback.

Best regards,
Christophe

References:

1)
http://robhirschfeld.com/2011/12/04/opscode-summit-recap-chef-devops-cloud/
"
In short, Chef is converging the code bases of their three products (hosted,
private and open). The primary change on this will moving from CouchBD to a 
SQL
based DB and moving away the API calls away from Merb/Ruby to Erlang. They are
also improving search so that we can make more fine-tuned requests that 
perform
better and return less extraneous data.
"

2)
http://wiki.opscode.com/display/chef/Opscode+Chef+Short-Term+Roadmap+and+Performance+Improvements

"
Rob Hirschfeld's Notes

Chef <3 Erlang

Scaling
    moving to more Erlang on REST APIs, made a 2x in memory use difference
    Erlang bits have realy steady performance
"

3)
http://wiki.opscode.com/display/chef/Closing+Session+-+Decisions%2C+Follow-Ups%2C+and+Next+Steps
"
Erlang Chef Server - Chris Brown

    Write docs on operating the erlang server
"

4)
http://devopsanywhere.blogspot.com/2012/01/chef-in-2012.html
"
On the server side, we can expect a lot of performance improvements as
chef-server moves from ruby + couchdb to erlang + mysql. This may happen 
sooner
than one might normally expect as Opscode has already converted part of Hosted
Chef to Erlang and MySQL, it just hasn't open-sourced that code yet.
"