Event Driven Microservices with Node.js & RabbitMQ & Docker: Cat Adoption Center

Description

This repository implements an Event Driven Architecture for microservices using:

• Node.js services
• RabbitMQ (message broker)
• MongoDB
• Docker

The repository represents the backend for a cat adoption center application, which is managed by the following microservices:

1. User Service: For user management.
2. Cat Service: For cat management.
3. Notifications Service: Sends notifications to users.
4. RabbitMQ Message Broker: For asynchronous communication between the microservices.

Prerequisites

Before you begin, ensure you have the following installed:

• Node.js version 16 or higher
• Docker: Install Docker

Installation

1. Clone this repository to your local machine.
2. Navigate to the repository's root directory.

Usage

1. Open a terminal window.

2. Navigate to each service within the services directory, then install and build each one using the following commands:

   yarn
   yarn build
   

3. Navigate to the repository's root directory.

4. Run the following command to start the application:

   docker-compose up
   

Docker Containers

RabbitMQ

• Image: rabbitmq:3-management
• Ports: 5672 (AMQP), 15672 (Management UI)
• Healthcheck: RabbitMQ status check
• Volumes: rabbitmq_data (for persistent data)

MongoDB

• Image: mongo:latest
• Port: 27017
• Volumes: mongodb_data (for persistent data)

User Service

• Custom microservice for user-related operations.
• Built from: ./services/user-service context.
• Port: 3001
• Environment variables:
  • NODE_ENV: production
  • PORT: 3000
  • MONGODB_URI: mongodb://mongodb:27017
  • AMQP_URI: amqp://guest:guest@rabbitmq:5672
  • Depends on: MongoDB (service_started), RabbitMQ (service_healthy)

Cat Service

• Custom microservice for cat-related operations.
• Built from: ./services/cat-service context.
• Port: 3002
• Environment variables:
  • NODE_ENV: production
  • PORT: 3000
  • MONGODB_URI: mongodb://mongodb:27017
  • AMQP_URI: amqp://guest:guest@rabbitmq:5672
  • Depends on: MongoDB (service_started), RabbitMQ (service_healthy)

Notifications Service

• Custom microservice for sending notifications.
• Built from: ./services/notifications-service context.
• Port: 3003
• Environment variables:
  • NODE_ENV: production
  • PORT: 3000
  • MONGODB_URI: mongodb://mongodb:27017
  • AMQP_URI: amqp://guest:guest@rabbitmq:5672
  • Depends on: MongoDB (service_started), RabbitMQ (service_healthy)