Producer{{producer}}

Broker{{event-bus}}

ConsumerHandles delivered events.

Callback receiverReceives the asynchronous outcome.

Publish

Producer → Broker async {{topic}}

Broker → Producer return Confirm durable publication.

Delivery

Broker → Consumer async {{delivery}}

Consumer → Broker return {{consumer}}

Callback

Consumer → Callback receiver async {{callback}}

Broker → Producer error Report a callback timeout.

{{title}}