MicroChat

Real-Time Chat Application with Microservices and Event-Driven Architecture

A scalable messaging platform built with Node.js, RabbitMQ, Docker, and MongoDB

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🚀 Features

✔ User Management – JWT authentication & profile handling
✔ Real-Time Chat – Websocket-powered messaging
✔ Notifications – Email alerts for offline users
✔ Event-Driven – RabbitMQ for inter-service communication
✔ Containerized – Dockerized services with Nginx load balancing

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🛠 Tech Stack

Category	Technologies
Backend	Node.js, Express, TypeScript
Database	MongoDB (Mongoose)
Messaging	RabbitMQ
Real-Time	Socket.io
DevOps	Docker, Docker Compose, Nginx

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⚡ Quick Start (Docker)

# 1. Clone the repository
git clone https://github.com/Sachita007/MicroChat.git
cd MicroChat

# 2. Set up environment variables 
cp user-service/.env.example user-service/.env
cp chat-service/.env.example chat-service/.env
cp notification-service/.env.example notification-service/.env

# 3. Launch all services
docker-compose up --build

Access endpoints:

• API Gateway: http://localhost:85
• User Service: http://localhost:8081
• Chat Service: http://localhost:8082
• Notification Service: http://localhost:8083

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🔧 Manual Setup

Prerequisites

• Node.js v18+
• MongoDB (local or Atlas URI)
• RabbitMQ (local or CloudAMQP)

# Install dependencies for each service
cd user-service && npm install
cd ../chat-service && npm install 
cd ../notification-service && npm install

# Start services (in separate terminals)
npm run dev

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📂 Project Structure

chatflow/
├── user-service/          # Auth & user profiles
│
├── chat-service/          # Real-time messaging
│
├── notification-service/  # Email/push alerts
│
├── gateway/               # API Gateway
└── nginx/                 # Reverse proxy config

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🔌 API Endpoints

Service	Endpoint	Description
Auth	POST /user/register	Register new user
	POST /user/login	Generate JWT token
Chat	WS /chat	Websocket connection
	GET /chat/get/:receiverId	Fetch message history
	POST /chat/send	Send Message