Allow internal custom implementations of DeferredBehavior

Pass around context for stashing

akka-actor-typed/src/main/scala/akka/actor/typed/Behavior.scala

@@ -179,18 +179,17 @@ object Behavior {
    * Not placed in internal.BehaviorImpl because Behavior is sealed.
    */
   @InternalApi
-  @DoNotInherit
-  private[akka] class DeferredBehavior[T](val factory: SAC[T] ⇒ Behavior[T]) extends Behavior[T] {
-
-    /** start the deferred behavior */
-    @throws(classOf[Exception])
-    def apply(ctx: ActorContext[T]): Behavior[T] = factory(ctx.asScala)
-
-    override def toString: String = s"Deferred(${LineNumbers(factory)})"
+  private[akka] abstract class DeferredBehavior[T] extends Behavior[T] {
+    def apply(ctx: ActorContext[T]): Behavior[T]
   }
-  object DeferredBehavior {
+  /** INTERNAL API */
+  @InternalApi
+  private[akka] object DeferredBehavior {
     def apply[T](factory: SAC[T] ⇒ Behavior[T]) =
-      new DeferredBehavior[T](factory)
+      new DeferredBehavior[T] {
+        def apply(ctx: ActorContext[T]): Behavior[T] = factory(ctx.asScala)
+        override def toString: String = s"Deferred(${LineNumbers(factory)})"
+      }
   }
 
   /**

akka-persistence-typed/src/main/scala/akka/persistence/typed/internal/EventsourcedRecoveringEvents.scala

@@ -85,7 +85,7 @@ private[akka] class EventsourcedRecoveringEvents[Command, Event, State](
 
   def onCommand(cmd: Command): Behavior[Any] = {
     // during recovery, stash all incoming commands
-    stash(cmd)
+    stash(context, cmd)
     same
   }
 
@@ -111,7 +111,7 @@ private[akka] class EventsourcedRecoveringEvents[Command, Event, State](
         onRecoveryFailure(cause, event = None)
 
       case other ⇒
-        stash(other)
+        stash(context, other)
         Behaviors.same
     }
   } catch {

akka-persistence-typed/src/main/scala/akka/persistence/typed/internal/EventsourcedRecoveringSnapshot.scala

@@ -80,7 +80,7 @@ final class EventsourcedRecoveringSnapshot[Command, Event, State](
 
   def onCommand(cmd: Command): Behavior[Any] = {
     // during recovery, stash all incoming commands
-    stash(cmd)
+    stash(context, cmd)
     Behavior.same
   }
 
@@ -124,7 +124,7 @@ final class EventsourcedRecoveringSnapshot[Command, Event, State](
         onRecoveryFailure(cause, event = None)
 
       case other ⇒
-        stash(other)
+        stash(context, other)
         same
     }
   } catch {

akka-persistence-typed/src/main/scala/akka/persistence/typed/internal/EventsourcedRequestingRecoveryPermit.scala

@@ -80,7 +80,7 @@ private[akka] final class EventsourcedRequestingRecoveryPermit[Command, Event, S
         becomeRecovering()
 
       case other ⇒
-        stash(other)
+        stash(context, other)
         Behaviors.same
     }
   }

akka-persistence-typed/src/main/scala/akka/persistence/typed/internal/EventsourcedRunning.scala

@@ -115,7 +115,7 @@ class EventsourcedRunning[Command, Event, State](
     def name = "PersistingEvents"
 
     final override def onCommand(c: Command): Behavior[Any] = {
-      stash(c)
+      stash(context, c)
       same
     }
 

akka-persistence-typed/src/main/scala/akka/persistence/typed/internal/EventsourcedStashManagement.scala

@@ -21,7 +21,6 @@ private[akka] trait EventsourcedStashManagement {
   protected def log: LoggingAdapter
 
   protected def extension: Persistence
-  protected def context: ActorContext[Any]
 
   protected val internalStash: StashBuffer[Any]
 
@@ -43,7 +42,7 @@ private[akka] trait EventsourcedStashManagement {
         other // the other strategies are supported
     }
 
-  protected def stash(msg: Any): Unit = {
+  protected def stash(ctx: ActorContext[Any], msg: Any): Unit = {
     if (logLevel != OffLevel) log.log(logLevel, "Stashing message: {}", msg)
 
     try internalStash.stash(msg) catch {
@@ -51,7 +50,7 @@ private[akka] trait EventsourcedStashManagement {
         internalStashOverflowStrategy match {
           case DiscardToDeadLetterStrategy ⇒
             val snd: a.ActorRef = a.ActorRef.noSender // FIXME can we improve it somehow?
-            context.system.deadLetters.tell(DeadLetter(msg, snd, context.self.toUntyped))
+            ctx.system.deadLetters.tell(DeadLetter(msg, snd, ctx.self.toUntyped))
 
           case ReplyToStrategy(response) ⇒
             throw new RuntimeException("ReplyToStrategy does not make sense at all in Akka Typed, since there is no sender()!")
@@ -65,7 +64,7 @@ private[akka] trait EventsourcedStashManagement {
   protected def tryUnstash(ctx: ActorContext[Any], behavior: Behavior[Any]): Behavior[Any] = {
     if (internalStash.nonEmpty) {
       log.debug("Unstashing message: {}", internalStash.head.getClass)
-      internalStash.unstash(context, behavior, 1, ConstantFun.scalaIdentityFunction)
+      internalStash.unstash(ctx, behavior, 1, ConstantFun.scalaIdentityFunction)
     } else behavior
   }
 

akka-persistence-typed/src/main/scala/akka/persistence/typed/internal/PersistentBehaviorImpl.scala

@@ -1,5 +1,7 @@
 package akka.persistence.typed.internal
 
+import akka.actor.typed
+import akka.actor.typed.Behavior
 import akka.actor.typed.Behavior.DeferredBehavior
 import akka.actor.typed.internal.TimerSchedulerImpl
 import akka.actor.typed.scaladsl.ActorContext
@@ -26,30 +28,7 @@ private[persistence] class PersistentBehaviorImpl[Command, Event, State] private
   snapshotPluginId:  String,
   snapshotWhen:      (State, Event, Long) ⇒ Boolean,
   recovery:          Recovery
-) extends DeferredBehavior[Command](ctx ⇒
-  TimerSchedulerImpl.wrapWithTimers[Command] { timers ⇒
-    val callbacks = EventsourcedCallbacks[Command, Event, State](
-      initialState,
-      commandHandler,
-      eventHandler,
-      snapshotWhen,
-      recoveryCompleted,
-      tagger
-    )
-    val pluginIds = EventsourcedPluginIds(
-      journalPluginId,
-      snapshotPluginId
-    )
-    new EventsourcedRequestingRecoveryPermit(
-      persistenceId,
-      ctx.asInstanceOf[ActorContext[Any]], // sorry
-      timers.asInstanceOf[TimerScheduler[Any]], // sorry
-      recovery,
-      callbacks,
-      pluginIds
-    ).narrow[Command]
-
-  }(ctx)) with PersistentBehavior[Command, Event, State] {
+) extends PersistentBehavior[Command, Event, State] {
 
   def this(
     persistenceId:  String,
@@ -70,6 +49,33 @@ private[persistence] class PersistentBehaviorImpl[Command, Event, State] private
     )
   }
 
+  override def apply(ctx: typed.ActorContext[Command]): Behavior[Command] = {
+    DeferredBehavior[Command](ctx ⇒
+      TimerSchedulerImpl.wrapWithTimers[Command] { timers ⇒
+        val callbacks = EventsourcedCallbacks[Command, Event, State](
+          initialState,
+          commandHandler,
+          eventHandler,
+          snapshotWhen,
+          recoveryCompleted,
+          tagger
+        )
+        val pluginIds = EventsourcedPluginIds(
+          journalPluginId,
+          snapshotPluginId
+        )
+        new EventsourcedRequestingRecoveryPermit(
+          persistenceId,
+          ctx.asInstanceOf[ActorContext[Any]], // sorry
+          timers.asInstanceOf[TimerScheduler[Any]], // sorry
+          recovery,
+          callbacks,
+          pluginIds
+        ).narrow[Command]
+
+      }(ctx))
+  }
+
   /**
    * The `callback` function is called to notify the actor that the recovery process
    * is finished.