📧 Microservice Email

Microservice Email is a service developed in Java with Spring Boot, designed to simplify email sending through Gmail. This microservice provides an efficient and scalable solution for integrating email sending functionalities into your applications, utilizing the reliable infrastructure of Gmail as the SMTP server.

📑 Table of Contents

• Prerequisites
• Installation Instructions
  • Clone the Repository
  • Navigate to the Project Directory
  • Setting up Gmail authentication
  • Configuring Environment Variables
    • Important Note
    • Configuring Environment Variables Automatically
      • Windows
      • Linux
    • Initializing the Database with Docker
  • Run the Application
    • Windows
    • Linux

📋 Prerequisites

Before running the application, ensure you have the following prerequisites installed.

• Git: Widely-used distributed version control system.
• Java 17: A stable version of the Java Development Kit (JDK).
• Docker: A platform for developing, shipping, and running applications in containers.

📝 Installation Instructions

1. Clone the Repository

git clone https://github.com/esperanca-leonardo/microservice-email.git

2. Navigate to the Project Directory

cd microservice-email

3. Setting up Gmail authentication

This project uses Gmail for sending emails. You will need to generate an app password for your Gmail account. Follow the instructions here to generate an app password.

4. Configuring Environment Variables

Before utilizing this project, it's crucial to configure certain environment variables on your system. To simplify this process, default values are provided as follows.

SERVER_PORT=8080

MAIL_HOST=smtp.gmail.com
MAIL_PORT=587
MAIL_USERNAME=youremail@gmail.com
MAIL_PASSWORD=your_app_password

DATABASE_HOST=localhost
DATABASE_PORT=5432
DATABASE_NAME=microservice_email
DATABASE_USER=user
DATABASE_USER_PASSWORD=123

• 4.1 Important Note

  Before proceeding with the instructions below, please remember to change the values of the following environment variables according to your credentials: MAIL_USERNAME, MAIL_PASSWORD.

• 4.2 Configuring Environment Variables Automatically

  To make the setup process more easier, you can use a script to automatically configure these environment variables. Below are instructions and scripts for Windows and Linux systems.

  • 4.2.1. Windows

    For Windows, you can use a batch script to set the environment variables. Create a file named set_env_vars.bat with the following content.

     @echo off
     setx SERVER_PORT 8080
     
     setx MAIL_HOST smtp.gmail.com
     setx MAIL_PORT 587
     setx MAIL_USERNAME your_email@gmail.com
     setx MAIL_PASSWORD "your_app_password"
     
     setx DATABASE_HOST localhost
     setx DATABASE_PORT 5432
     setx DATABASE_NAME microservice_email
     setx DATABASE_USER user
     setx DATABASE_USER_PASSWORD 123

    To run the script, double-click the set_env_vars.bat file or execute the below command in the terminal.

    .\set_env_vars.bat	

  • 4.2.2. Linux

    For Linux, you can use a shell script to set the environment variables. Create a file named set_env_vars.sh with the following content.

     #!/bin/bash
    
     if [ -f ~/.bashrc ]; then
       echo "export SERVER_PORT=8080" >> ~/.bashrc
    
       echo "export MAIL_HOST=smtp.gmail.com" >> ~/.bashrc
       echo "export MAIL_PORT=587" >> ~/.bashrc
       echo "export MAIL_USERNAME=your_email@gmail.com" >> ~/.bashrc
       echo "export MAIL_PASSWORD='your_app_password'" >> ~/.bashrc
    
       echo "export DATABASE_HOST=localhost" >> ~/.bashrc
       echo "export DATABASE_PORT=5432" >> ~/.bashrc
       echo "export DATABASE_NAME=microservice_email" >> ~/.bashrc
       echo "export DATABASE_USER=user" >> ~/.bashrc
       echo "export DATABASE_USER_PASSWORD=123" >> ~/.bashrc
     else
       echo "~/.bashrc file not found. Variables not defined."
       exit 1
     fi

    To execute the script, navigate to the directory containing set_env_vars.sh and run the following command.

     chmod u+x set_env_vars.sh && ./set_env_vars.sh

    After running the script, remember to apply the changes by executing

     source ~/.bashrc

5. Initializing the Database with Docker

This project is facilitated by a docker-compose.yml file, encapsulating all the essential configurations to bootstrap the database infrastructure. Copy and paste the command below into the terminal to start the database.

docker-compose up -d

6. Run the Application

Depending on your operating system, execute the commands below to start the application.

• Windows

  Utilize the Maven Wrapper to run the application on Windows.

  .\mvnw.cmd spring-boot:run

• Linux

  Grant executable permissions to the Maven Wrapper and initiate the application on Linux.

  chmod u+x mvnw && ./mvnw spring-boot:run