Scala Reactive Programming

Components of Akka's ActorSystem

In the Akka Toolkit, an ActorSystem is a hierarchical group of actors that share common configurations, for example, dispatchers, executors, schedulers, logging, threads, remote capabilities, and addresses. It is also the entry point for creating or looking up Actors.

To fulfill all its roles and responsibilities, it uses the following components:

• User Guardian Actor
• System Guardian Actor
• DeadLetter
• Scheduler
• Configuration
• EventStream
• Mailboxes
• Dispatchers

When we go through the Akka Actors module (akka-actor) API, we can observe the following things:

abstract class ActorSystem extends ActorRefFactory { // Components of ActorSystem def eventStream: EventStream def deadLetters: ActorRef def scheduler: Scheduler ...