Dead letter handling

[bolshakov]

Currently, the only way to signal to the framework that the message was not handled is by raising a NoMatchingPattern exception:

def receive(msg)
  case msg
  in String
   # do the thing
  end
end

in this example, if an actor receives anything other than a string, the exception is thrown. However, when the receivemethod is called, it's not possible to say whether the error was thrown because the message is unhandled or due to an error in the handling logic.

• Implement dead letter routing
• Make it possible to explicitly mark a message as unhandled
• Handle NoMatchingPattern a more reliable way
• Messages sent to stopped actor go to dead letter queue
• Messages received after Terminate go to dead letter queue
• [ ]