- create ActorSystemImpl trait to make ActorSystem fully abstract
- add Java API for constructing (ActorSystem.create(...))
- only go through factory methods because .start() has become necessary
- rename all user-facing occurrences of “app” to “system” (Actor trait
and TestKit/AkkaSpec)
- pass ActorSystemImpl to ActorRefs upon creation, which means that
actorOf() and friends need such an argument, which must be provided to
the ActorRefProvider by the ActorRefFactory implementation
(since I know now what’s causing these Jenkins failures ;-) )
- include recipient in DeadLetter
- include recipient in calls to enqueue/systemEnqueue
- move DeadLetterMailbox to ActorSystem (saves some space, too)
- hook up DeadLetterMailbox so it sends DeadLetters to app.deadLetters,
which publishes them on the eventStream
- subscribe TestEventListener to DeadLetter and turn it into Warning
The generated warnings about ChildTerminated are very much correct, they
remind us that we still need to fix supervisor.stop() to await all
children’s death before actually committing suicide.
- channel field was always set to NullChannel and not used
- receiver field is better put into the Mailbox, because there it takes
space only once per actor
- leaves only the bare SystemMessage to be queued
- rename MessageInvocation to Envelope (same for System...)
- rename MessageQueue to Mailbox and include ExecutableMailbox code
- make MailboxType act as factory, so users can provide their own
- properly type mailbox field as Mailbox everywhere
- adapt CallingThreadDispatcher and some tests
- create DeadletterMailbox and use it to replace actor’s mailbox on
terminate()
