What technologies or tools were used in developing the notification module?

The following technologies and tools are typically used when developing a notification module in a Java project:

• Spring Boot for creating the notification service.
• RabbitMQ or Kafka for asynchronous message and event transmission.
• SMTP server or third-party services (e.g., SendGrid) for sending emails.
• Push notifications via Firebase Cloud Messaging (FCM) for mobile applications.
• Database (e.g., Redis or PostgreSQL) for storing notification status and history.

Example of a simple email sending using Spring Boot:

@Autowired
private JavaMailSender mailSender;

public void sendEmail(String to, String subject, String text) {
    SimpleMailMessage message = new SimpleMailMessage();
    message.setTo(to);
    message.setSubject(subject);
    message.setText(text);
    mailSender.send(message);
}

This approach provides a reliable and scalable notification system.