Abstract base class for Lively live-streaming database implementations.
This module is installed via npm:
$ npm install livelydb
For an example, check out MemLively.
Retrieve the object stored in the database pointed to by the key.
The callback will be called with an error, and the data as the second argument.
Puts the object
value into the database, referenced by the key
Delets the object from the database, referenced by the key