An application to retrieve weather metrics of given city

This application retrieves weather information from https://openweathermap.org/ for given city, calculates daily and nightly averages of temperatures and average pressure for next three days from today as per below--

• Average of daily (06:00 – 18:00) and nightly (18:01 – 05:59) temperatures in Celsius for the next 3 days from today’s date.
• Average of pressure for the next 3 days from today’s date.

How to run the application:

This is a spring-boot application with Maven. Following are the ways to run the application--

1. Open this application with Eclipse IDE (Preferably Spring Tool Suite) and run as Spring-Boot app.
2. Navigate to Project's root directory where pom.xml file is located. Then run mvn spring-boot:run command.

Design and Implementation:

1. Application has Controller and Service layar. I've created a RestController with name WeatherController.java that exposes /data endpoint to get the required data. Data is returned in JSON format. Service layer consists of a class named WeatherServiceImpl.java. Spring's RestTemplate bean is injected in this service class to retrieve data from https://openweathermap.org/.
2. WeatherConfiguration.java is a configuration class. Beans are created in this class.
3. application.properties file is used to set default port of application to 8085 and application context is set to /weather. Application is accessible via http://localhost:8085/weather/data?city={cityName} link
4. eg: http://localhost:8085/weather/data?city=London
5. For centralized exception handling and to return appropriate status codes, GlobalExceptionHandler.java ControllerAdvice is created. This returns ErrorInfo Object whenever exception is raised.

Swagger UI

Swagger-UI

Swagger API Documentation

Swagger-API-Documentation