Scala Reactive Programming

Event-Driven versus Message-Driven

The core principle of RP is the Event-Driven approach, whereas the core principle of a Reactive system is the Message-Driven approach.

RP gives us the benefits at component level only because events are emitted and processed locally. They cannot work across the network in a distributed system.

Reactive systems give us the benefits at the system level, because messages are processed and communicated across the network in a distributed system.

We cannot get the full benefits just with RP; we should use the combination of RP and the Reactive system.

In a Reactive system with RP, generated events are represented as messages under-the-hood, and they are processed as messages.