nuc-node-event-test/sample/README.md

Event-driven Message Broker

# Sample Usage: node-event

This folder contains two sample Express apps demonstrating how to use the `nodeEvent` client to publish and subscribe to events via a central event server (expected to be running at `localhost:8080`).

## Structure

- `publisher/`: Publishes events to the event server when a POST request is made.
- `subscriber/`: Subscribes to events from the event server and logs them to the console.

## Prerequisites
- The event server (Socket.IO server) must be running at `localhost:8080`.
- Install dependencies in the project root: `npm install`

## Running the Apps

### 1. Start the Publisher
```
node sample/publisher/index.js
```
The publisher will listen on [http://localhost:3001](http://localhost:3001).

Send a POST request to publish an event:
```
curl -X POST http://localhost:3001/send -H "Content-Type: application/json" -d '{"type":"test","payload":{"msg":"hello"}}'
```

### 2. Start the Subscriber
```
node sample/subscriber/index.js
```
The subscriber will listen on [http://localhost:3002](http://localhost:3002) and log any received `test` events.

## What Happens?
- When you POST to `/send` on the publisher, it emits a `test` event to the event server.
- The subscriber, which is subscribed to `test` events, receives and logs the payload.