Best Object oriented way of executing multiple functionalities

I have a listener kind of component which collects some raw data from different sources, there are some functionalities like, 1. Rules execution 2. Updating the DB 3. Computing or applying some algorithms on this continuous data

Currently the above behaviour is present in only one class, but in different methods.

I am not an expert in object oriented programming, so I need some suggestions on how best we can implement the above module in object oriented way.