How do I implement a pub-sub system in my application?

How do I implement a pub-sub system in my application?

To implement a pub-sub system, you can use libraries like Redis or MQTT. Do you have a specific programming language in mind?

I'm using Node.js. Can you give me a code example?

Sure! Here's a simple example using Node.js with the 'events' module:

const EventEmitter = require('events');

class PubSub extends EventEmitter {}
const pubsub = new PubSub();

pubsub.on('message', (data) => {
    console.log(`Received message: ${data}`);
});

pubsub.emit('message', 'Hello, World!');

What are the advantages of using a pub-sub system?

Pub-sub systems decouple the components of your application, allowing for better scalability and flexibility. They also enable asynchronous communication.