Hands-On Microservices with Rust

The main function

Everything is ready for the implementation of the main function:

fn main() -> Result<(), Error> {    env_logger::init();    let (tx, rx) = channel();    let addr: SocketAddr = env::var("ADDRESS")?.parse()?;    let mut server = ServerBuilder::new_plain();    server.http.set_addr(addr)?;    let ring = RingImpl::new(tx);    server.add_service(RingServer::new_service_def(ring));    server.http.set_cpu_pool_threads(4);    let _server = server.build()?;    worker_loop(rx)}

We initialized a logger and created a channel that we will use to send actions from RingImpl to a worker. We extracted SocketAddr from the ADDRESS environment variable and used this value to bind a server to the provided address.

We created a ServerBuilder instance with the new_plain method. ...