Hands-On Microservices with Rust

Spawning a thread for image processing

In our first example, we'll create a microservice that expects a request with an image, loads it completely to the memory, sends it to a thread for resizing, and waits for the result. Let's start by creating a thread that expects image data and responses. To receive the request, we'll use the mpsc::channel module and oneshot::channel for responses, because multiple clients can't send requests and we only expect one response per image. For the requests, we'll use the following struct:

struct WorkerRequest {    buffer: Vec<u8>,    width: u16,    height: u16,    tx: oneshot::Sender<WorkerResponse>,}

WorkerRequest contains the buffer field for binary image data, the desired width and height of the resized image, and ...