This chapter reveals another way to build reactive applications with Akka. We will introduce Akka Typed, an Akka module which implements the actor model in a slightly different way compared to untyped Akka. We will contrast classical and typed approaches and show how the latter reduces the developer's choices but increases type safety and simplifies reasoning about actor-based programs during the maintenance phase.

The following topics will be covered in this chapter:

• Differences between typed and untyped approaches
• Creating, stopping, and discovering actors
• The life cycle of an actor and supervision
• Schedulers
• Stashing
• Combining behaviors
• Testing