Creating OCCI Extensions

To create OCCI extensions:

1. Define the method to retreive all extension information. This method must have the following signature:

def get_extensions()

It must return a list. That list must contain at least one dict. The dict must contain a pyssf backend handler. The dict must also contain a list of OCCI Categories that are handled by the pyssf backend handler. The OCCI Categories and pyssf backend handler should be defined in the same python file.

2. Define the extension categories. Depending on your needs you can define Kind, Mixin, Link or Action extensions.

Define the extension handler(s).

Examples of OCCI extensions can be found in the same directory as this README file.

fiware.py - this includes a very basic extension.
occi_future.py - this includes extensions that are considered as future OCCI-WG extensions.
openstack.py - this includes various OpenStack specific extensions.

All extensions are enumerated via __init__.py and loaded via wsgi.py.