Class Complement

Parameters:

• identifier (string) - complement unique identifier, on interface it is use for the Event invocation
• conf (dictionary) - the configuration of the module as {item: value}
• db (database collection (mongoDB)) - the database collection of the complement

The starting method of the complement

Each interface or module should define here the initialization, subscribe to events, the periodic actions, ...

Output a log string

If loggin activated prompts on standard output the string adding to it "[complement_name identifier] ". Uses emma.logger.log().

Parameters:

• msg (string) - the text to output
• level (logging level) - default logging.INFO

Update database

Stores the emma version on the collection of the complement. And returns the old version from the database and the actual version of emma.

Returns:

(old version, new version)