Let’s refactor our async application a little bit. Instead of using a Mutex to moderate our queue, let’s instead use a single task and use a channel for synchronisation.


  1. Pick a MPMC channel module (recommended tokio, async-std or async-channel)

  2. Implement a function mailbox that loops over all incoming messages and

    • On "PUBLISH", just stores data

    • On "RETRIEVE", sends the message back to the task requesting the data

  3. Make sure this function gets started correctly

you will need to implement 2 channels, one towards your mailbox and one backchannel.

Getting started

Use this template:

async fn mailbox_function(storage: VecDeque<String>, recv: Receiver</* */>) {
  // ...