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 technology stack in mind?

I'm using Node.js for my backend.

Great! You can use the 'node-pubsub' library. First, install it using npm, then set up your publisher and subscriber.

Can you show me a basic example?

Sure! Here's a simple example:

const PubSub = require('node-pubsub');
const pubsub = new PubSub();

// Subscriber
pubsub.subscribe('myTopic', (data) => {
    console.log('Received data:', data);
});

// Publisher
pubsub.publish('myTopic', { message: 'Hello, World!' });

This will log 'Received data: { message: 'Hello, World!' }' when you publish.

What if I want to handle multiple topics?

You can simply subscribe to multiple topics by calling subscribe multiple times with different topic names. Each subscriber can handle its own logic based on the topic.