GitHub user mahendra opened a pull request:
https://github.com/apache/libcloud/pull/76
LIBCLOUD-255 : Driver registration and handling improvements
The following limitations can come up while using libcloud in production -
because of usage of C/C++ style ```ENUM``` based mechanism of registering
drivers.
* In a s/w setup which supports multiple cloud environments (or local), the
admin/dev must be able to change the driver via a conf file. For eg:
```
storage_driver = 's3'
username = 'pqrs'
key = 'abcd'
```
In the current mechanism, the mapping of the driver name to number must
be done externally.
* There is no mechanism for dynamically registering a driver. It is quite
possible that user's might have drivers which are for private cloud setups.
They may want to install libcloud via PYPI, but use their own private drivers.
Currently, there is no mechanism to do this without changing libcloud code.
Also, IMHO, the C/C++ style enumerations need not be there in python.
The solution for this is pretty simple to implement (given the good design
of libcloud).
1. Replace the ```enum``` numbers with strings. Given the usage of a
dictionary for registering drivers, this will work out of the box.
2. Implement a ```set_driver()``` API which can be used for registering new
drivers.
With this change, libcloud usage can be controlled externally (via a config
file or a db field etc.) as the admin sees fit.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/mahendra/libcloud naming
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/libcloud/pull/76.patch
----
commit 2e1257f7ceb81a208916b3a65eeb084b47fb56d7
Author: Mahendra M <[email protected]>
Date: 2012-11-07T12:56:59Z
LIBCLOUD-255 : Driver registration and handling improvements
----
