Responding with TCP

When it comes to responding to TCP, we must implement our actor system in the src/main.rs file. First, we need to import our new actors with the following code:

. . .
use order_tracker::{TrackerActor, GetTrackerActor,
                    TrackerMessage};

Now, we must construct our extra channel in the main function with the following code:

let addr = "127.0.0.1:8080".to_string();
let socket = TcpListener::bind(&addr).await.unwrap();
println!("Listening on: {}", addr);
let (tx, rx) = mpsc::channel::<Message>(1);
let (tracker_tx, tracker_rx) =
    mpsc::channel::<TrackerMessage>(1);
let tracker_tx_one = tracker_tx.clone();

Here, we have a tracker channel. With the tracker and main channels, we can spin up two different threads with the tracker actor and order book actor with the following code:

tokio...