How do I implement the publish-subscribe pattern in my application?

How do I implement the publish-subscribe pattern in my application?

The publish-subscribe pattern is a messaging pattern where senders (publishers) send messages without knowing who will receive them (subscribers). You can implement it using message brokers like RabbitMQ or by using event-driven architectures.

Can you give me a simple code example?

Sure! Here's a basic example in JavaScript using Node.js:

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 this pattern?

The advantages include decoupling of components, scalability, and flexibility in adding new subscribers without modifying the publisher.

Are there any common pitfalls to avoid?

Yes, common pitfalls include not managing memory properly, leading to memory leaks, and failing to handle message delivery guarantees.