Message passing concepts in Rust - Mini Project: Build & Apply

Message Passing Concepts in Rust

📖 Scenario: Imagine you are building a simple chat system where one part of your program sends messages and another part receives them. To do this safely and clearly, Rust uses message passing between threads.

🎯 Goal: You will create a Rust program that sends messages from one thread to another using channels. This will help you understand how message passing works in Rust.

📋 What You'll Learn

Create a channel for message passing

Spawn a sender thread to send messages

Receive messages in the main thread

Print each received message

💡 Why This Matters

🌍 Real World

Message passing is used in programs that need to do many things at once, like chat apps or servers, to keep data safe and organized.

💼 Career

Understanding message passing helps you write safe, concurrent Rust programs, a valuable skill for systems programming and backend development.

1

Create a channel for message passing

Write code to create a channel using std::sync::mpsc::channel() and assign the sender to tx and the receiver to rx.

Rust

// Your code here

Hint

Use let (tx, rx) = std::sync::mpsc::channel(); to create the channel.

2

Spawn a sender thread to send messages

Use std::thread::spawn to create a new thread. Inside it, send the messages "Hello" and "Rust" using tx.send(). Clone tx before moving it into the thread.

Rust

use std::thread;

// Your code here

Hint

Clone tx with let tx1 = tx.clone(); and move it into the thread with thread::spawn(move || { ... }).

3

Receive messages in the main thread

Use a for loop with msg to iterate over rx and collect all messages sent by the sender thread.

Rust

// Your code here

Hint

Use for msg in rx { println!("Received: {}", msg); } to receive and print messages.

4

Print the received messages

Run the program to print each message received from the sender thread. The output should show Received: Hello and Received: Rust.

Rust

// Your code here

Hint

Make sure your main function runs the code and prints the messages.