Tangentially, but is there a queueing service with good and fast retrying of messages with no destination? Basically I'd like the incoming router to send a mes

Tangentially, but is there a queueing service with good and fast retrying of messages with no destination? Basically I'd like the incoming router to send a message of a specific type and subtype to an existing listener, but if one does not exist I'd like to take back the message, spawn a new listener which will get on the queue and resend the message. I wonder if I could use a messaging service for keeping track of this, rather than have to manage my own map of what application backends are ready to process which type of messages ( spawning that backend takes a lot of resources so I want them to be born and die based on demand).