News server backend implementations.
| Function | hexdigest | Undocumented |
| Class | Article | Undocumented |
| Class | NewsServerError | Undocumented |
| Interface | INewsStorage | An interface for storing and requesting news articles |
| Class | NewsStorage | Backwards compatibility class -- There is no reason to inherit from this, just implement INewsStorage instead. |
| Class | PickleStorage | A trivial NewsStorage implementation using pickles |
| Class | Group | Undocumented |
| Class | NewsShelf | A NewStorage implementation using Twisted's dirdbm persistence module. |
| Class | NewsStorageAugmentation | A NewsStorage implementation using Twisted's asynchronous DB-API |
| Function | makeGroupSQL | Undocumented |
| Function | makeOverviewSQL | Undocumented |
| Class | _ModerationMixin | Storage implementations can inherit from this class to get the
easy-to-use notifyModerators method which will take care of
sending messages which require moderation to a list of moderators. |