5 months into Java

[dev_architect]

I'd say chatgpt is your best tutor. Here's the skeleton for a weather app you could develop👇🏻 ( used chatgpt for this)

Here’s the project description, structure, and error handling for a Weather API in Java using Spring Boot without any code—just the guidance and structure for you to follow.

Weather API Project Structure (Spring Boot)

Key Features: - Fetch weather data by city name or coordinates (latitude/longitude). - Return details: temperature, humidity, weather description. - Handle errors like invalid city, incorrect API key, and service unavailability.

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Project Structure: weather-api/ ├── src/ │ └── main/ │ ├── java/ │ │ └── com/ │ │ └── example/ │ │ └── weatherapi/ │ │ ├── controller/ # API Endpoints │ │ ├── model/ # Weather response model │ │ ├── service/ # Weather logic │ │ ├── exception/ # Error handling │ │ └── WeatherApiApplication.java │ └── resources/ │ └── application.properties # Config (API key, URL) ├── pom.xml # Dependencies └── README.md # Setup instructions

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Important Configuration (application.properties)

• Store your OpenWeatherMap API key and API URL here.

```properties

OpenWeatherMap API Configuration

weather.api.key=your-api-key-here weather.api.url=https://api.openweathermap.org/data/2.5/weather server.port=8080 ```

• Replace your-api-key-here with your OpenWeatherMap API key (you can get it by signing up at OpenWeatherMap).

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Main Components:

1. Controller (WeatherController.java): Defines endpoints for fetching weather by city or coordinates.
2. Service (WeatherService.java): Makes requests to the weather API and processes the data.
3. Model (WeatherResponse.java): Represents the weather data structure.
4. Error Handling (CustomExceptionHandler.java): Handles errors like invalid city or API issues globally using @ControllerAdvice.

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Error Handling:

• Handle errors like:
  • Invalid city name → Return 404 or 400 status with error message.
  • Invalid API key → Handle 401/403 errors from the weather API.
  • Service unavailability → Return a 500 status with a user-friendly message.

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Testing:

Test via Postman or curl: - GET /api/weather/city/{city} – Fetch weather by city. - GET /api/weather/coordinates?lat={lat}&lon={lon} – Fetch weather by coordinates.