Supervision

A Supervisors responsibility is to manage actors failure policies.

ZIO provides us a comprehensive and composable set of Schedules that can be used to define complex supervising policy.

There are three supervision scenarios available. Let's look at short examples. First do the imports:

import zio.actors._
import zio.{ Supervisor => _, _ }
import java.util.concurrent.TimeUnit

To provide no supervision use none. Remember that this provide no error recovery for actor:

Supervisor.none

Retrying is provided via retry with specified Schedule like recurs:

Supervisor.retry(Schedule.recurs(10))

The general method also requires effect that will be executed on Schedule end:

Supervisor.retryOrElse[Any, Long](Schedule.recurs(10), (e, a) => Console.printLine("nothing can be done").orDie)