WeatherApp

The Weather Alert Application is a Java-based program that enables users to receive weather alerts via email based on their location. The application consists of several components, including user registration, weather data retrieval, email notifications, and a scheduler for periodic weather checks.

Components

1. User Registration (DatabaseHandler)

• The DatabaseHandler class is responsible for managing user registration and data storage in a SQLite database.
• The createTable method creates the 'users' table if it doesn't exist. This table includes columns for user ID, username, location, and email.
• The insertUser method allows the insertion of user data into the 'users' table.
• The getUserEmail and getUserLocation methods retrieve email and location data for a given username.
• The closeConnection method is used to close the database connection.

2. Email Notifications (EmailNotifier)

• The EmailNotifier class handles the sending of email alerts to users.
• It leverages the JavaMail API to configure and send email messages via Gmail's SMTP server.
• The sendEmail method takes the recipient's email address, subject, and message as parameters and sends the email.

3. Weather Data Retrieval (WeatherAlert)

• The WeatherAlert class is responsible for periodically checking weather conditions and sending email alerts.
• It uses the Timer class to schedule weather checks at predefined intervals, such as every hour.
• The getWeatherData method retrieves weather data from an external source, such as a weather API. This method should be customized to fetch data from your chosen source.
• The getWeatherAlert method generates alert messages based on temperature thresholds.
• The run method is executed at each scheduled interval and triggers the weather checks, email generation, and sending of alerts.

Workflow

Here is the step-by-step explanation of how the application works:

1. User Registration:

   • Users are prompted to enter their username, location, and email when they run the application.
   • The user data is stored in a SQLite database using the DatabaseHandler class.

2. Weather Checks:

   • The WeatherAlert class, which extends TimerTask, is scheduled to run at defined intervals (e.g., every hour).
   • At each interval, the run method is executed, triggering the weather checks.

3. Weather Data Retrieval:

   • The getWeatherData method in the WeatherAlert class is responsible for fetching weather data. You should customize this method to use an appropriate weather data source (e.g., a weather API). The example code assumes a simple HTTP GET request to an API that returns JSON data.

4. Email Alerts:

   • The getWeatherAlert method in the WeatherAlert class generates alert messages based on the retrieved temperature data.
   • If the temperature crosses predefined thresholds, an email alert is generated using the EmailNotifier class and sent to the user's registered email address.

Customization

To customize the application:

• Replace the weather data retrieval logic in the getWeatherData method with your chosen weather data source. Ensure that the data retrieval and parsing are adapted to your specific API or source.

• Modify the getWeatherAlert method to define your temperature thresholds and alert messages based on your preferences.

• Adjust the scheduling of weather checks by modifying the timer interval in the main function of the WeatherAlertApp.

• Customize the user registration process, database schema, and email configuration to meet your project's requirements.

Contribution

If you'd like to contribute to this project, follow the standard Git contribution workflow:

1. Fork the repository.
2. Make changes in a new branch.
3. Create a pull request on the original repository for review.

Please note that this application serves as a starting point, and you can extend it with additional features, such as user authentication, more sophisticated weather data processing, or support for multiple locations.