set new primary status Closed.
Overridable callback to clean up the mailbox, called when an actor is unregistered.
Try to dequeue the next message from this queue, return null failing that.
Try to enqueue the message to this queue, or throw an exception.
Indicates whether this queue is non-empty.
This is only a marker to be put in the messageQueue’s stead to make error messages pertaining to violated mailbox type requirements less cryptic.
Should return the current number of messages held in this queue; may always return 0 if no other value is available efficiently.
Will at least try to process all queued system messages: in case of failure simply drop and go on to the next, because there is nothing to restart here (failure is in ActorCell somewhere …).
Reduce the suspend count by one.
true if the suspend count reached zero
Reset Scheduled status, keeping primary status as is.
Set Scheduled status, keeping primary status as is.
Increment the suspend count by one.
true if the previous suspend count was zero