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Add PreRestart to typed docs #26899

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Johan Andrén 2019-09-19 16:23:32 +02:00 • committed by GitHub
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akka-docs/src/main/paradox/typed/fault-tolerance.md
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@ -122,6 +122,18 @@ Java
That means that the `setup` block will only be run when the parent actor is first started, and not when it is
restarted.
## The PreRestart signal
Before a supervised actor is restarted it is sent the @apidoc[akka.actor.typed.PreRestart] signal giving it a chance to clean up resources
it has created, much like the @apidoc[akka.actor.typed.PostStop] signal when the actor stops.
The returned behavior from the `PreRestart` signal is ignored.
Scala
: @@snip [SupervisionCompileOnly.scala](/akka-actor-typed-tests/src/test/scala/docs/akka/typed/supervision/SupervisionCompileOnly.scala) { #restart-PreRestart-signal }
Java
: @@snip [SupervisionCompileOnlyTest.java](/akka-actor-typed-tests/src/test/java/jdocs/akka/typed/supervision/SupervisionCompileOnlyTest.java) { #restart-PreRestart-signal }
## Bubble failures up through the hierarchy
In some scenarios it may be useful to push the decision about what to do on a failure upwards in the Actor hierarchy