Dequeue

Tag 8: the client names a key and withdraws every message enqueued under it and not yet taken; the server opens a dequeue channel on the container’s begin scope and relays exactly one channel response stating whether any was.

The client opens this channel to withdraw every message waiting in the agent’s queue under a key: the key an enqueue carried. A message under another key stays where it is, and a message the agent has taken stays taken. The server opens a dequeue channel on the begin scope of the container’s proxy with the key and relays its answer.

• The request. The tag byte 8 followed by the key as JSON. Request states its form.
• The response. Exactly one channel response and the channel response finish. Response states the sequence.
• The messages withdrawn. Each message withdrawn is answered on its own enqueue channel with the byte 1, as the proxy answers it.