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Supervision

In essence, supervision in Akka Typed refers to the fact that all exceptions thrown from a behavior are caught and acted upon. An action can have one of three forms: resume, restart, and stop.

Let's see how supervision can be defined and which effect it has.

First, let's run our system as it is and observe its output:

... [INFO] Opening Bakery [INFO] Go shopping to Actor[akka://Typed-Bakery/user/Seller#1376187311] [INFO] Mixing Groceries(13,650,130,65) [ERROR] [akka://Typed-Bakery/user/Chef/Mixer_5] null   ch12.Mixer$MotorOverheatException   at ch12.Mixer$.$anonfun$mix$1(Mixer.scala:19)   at akka.actor.typed.internal.BehaviorImpl$ReceiveBehavior.receive(BehaviorImpl.scala:73)   ...   at java.lang.Thread.run(Thread.java:745)[INFO] PostStop ...

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