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Docs sample of accessing context from persistent behavior

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Johan Andrén 2018-09-20 15:45:16 +02:00
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16
akka-docs/src/main/paradox/typed/persistence.md
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@ -50,8 +50,7 @@ Next we'll discuss each of these in detail.
### Command handler
The command handler is a function with @java[2 parameters for]@scala[3 parameters for the `ActorContext`,]
current `State` and `Command`.
The command handler is a function with 2 parameters, the current `State` and the incoming `Command`.
A command handler returns an `Effect` directive that defines what event or events, if any, to persist.
Effects are created using @java[a factory that is returned via the `Effect()` method] @scala[the `Effect` factory]
@ -127,7 +126,18 @@ Java
The `PersistentBehavior` can then be run as with any plain typed actor as described in [typed actors documentation](actors-typed.md).
@java[The `ActorContext` can be obtained with `Behaviors.setup` and be passed as a constructor parameter.]
## Accessing the ActorContext
If the persistent behavior needs to use the `ActorContext`, for example to spawn child actors, it can be obtained by
wrapping construction with `Behaviors.setup`:
Scala
: @@snip [PersistentActorCompileOnyTest.scala](/akka-persistence-typed/src/test/scala/akka/persistence/typed/scaladsl/PersistentActorCompileOnlyTest.scala) { #actor-context }
Java
: @@snip [PersistentActorCompileOnyTest.java](/akka-persistence-typed/src/test/java/akka/persistence/typed/javadsl/PersistentActorCompileOnlyTest.java) { #actor-context }
## Larger example