https://github.com/reinaldoholtz/async-user-email-microservice-communication-broker

Communication between 2 microservices using RABBITMQ broker
https://github.com/reinaldoholtz/async-user-email-microservice-communication-broker

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Communication between 2 microservices using RABBITMQ broker

• Host: GitHub
• URL: https://github.com/reinaldoholtz/async-user-email-microservice-communication-broker
• Owner: reinaldoholtz
• Created: 2024-09-20T14:52:23.000Z (4 months ago)
• Default Branch: main
• Last Pushed: 2024-09-20T15:59:30.000Z (4 months ago)
• Last Synced: 2024-11-06T19:51:17.822Z (3 months ago)
• Language: Java
• Size: 135 KB
• Stars: 0
• Watchers: 1
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

        
# Asynchronous Communication Between Microservices Using RabbitMQ

![Asynchronous Communication Flow](./Project-Flow.jpg)

## Project Description

This project demonstrates the asynchronous communication flow between two microservices using RabbitMQ as a message broker. The scenario involves registering a new user and sending a confirmation email.

## Project Flow

1. A client sends a POST request to register a new user in the system.

2. Once the "User Microservice" receives the new user:

   - 2.1 It saves the user in the database (the "User Microservice" is responsible for managing users in the system).

   - 2.2 Then, it produces a message to the Broker to handle asynchronous communication.

3. The Broker (RabbitMQ) receives the message.

4. The "Email Microservice," which is connected to this Broker:

   - 4.1 Consumes the message.

   - 4.2 Sends a "Registration Successful" confirmation email.

   - 4.3 Finally, it saves the email record in the database.

This flow enables asynchronous communication, ensuring decoupling between the microservices for improved scalability and fault tolerance.

## Technologies Used

1. **Java (version 17)**: Core programming language used to build the microservices.

2. **Maven**: Dependency management tool used to handle project libraries and build the project.

3. **Lombok**: Automates code generation for getters, setters, constructors, and other boilerplate code.

4. **Spring Ecosystem**:

   - **Spring Boot**: To bootstrap and run the business microservices.

   - **Spring Web**: To create RESTful endpoints.

   - **Spring Data JPA**: To interact with the database and handle transactions.

   - **Spring Validation**: To validate API inputs.

   - **Spring AMQP**: To work with messaging protocols for asynchronous processing.

   - **Spring Mail**: To send confirmation emails to users.

5. **PostgreSQL**: The relational database used to store user and email information.

6. **RabbitMQ**: Message broker used for asynchronous communication (hosted on Cloud AMQP).

7. **Cloud AMQP**: RabbitMQ hosted in the cloud to manage message queues.

8. **SMTP (Google Mail)**: SMTP server used to send confirmation emails.