Project Overview

This project is a Spring Boot application that includes various functionalities such as employee management, validation, and global exception handling. The project uses Maven for dependency management.

Technologies Used

• Java
• Spring Boot
• Maven

Project Structure

DTOs

EmployeeDTO.java

This class represents the Data Transfer Object for an employee and includes various validation annotations to ensure data integrity.

Exception Handling

GlobalExceptionHandler.java

This class handles exceptions globally across the application. It includes handlers for:

• ResourceNotFoundException
• Exception
• MethodArgumentNotValidException

Response Handling

GlobalResponseHandler.java

This class implements ResponseBodyAdvice to wrap all responses in a consistent format using the ApiResponse class.

Validation Annotations

• @NotBlank
• @Size
• @Email
• @NotNull
• @Max
• @Min
• @PositiveOrZero
• @Digits
• @DecimalMin
• @DecimalMax
• @PastOrPresent
• @AssertTrue
• @Positive
• @FutureOrPresent
• @CreditCardNumber
• @Range
• @AssertFalse
• @PasswordValidation
• @EmployeeRoleValidation
• @PrimeNumberValidation

API Endpoints

Employee Management

• Create Employee

  • URL: /api/employees
  • Method: POST
  • Request Body: EmployeeDTO
  • Response: ApiResponse<EmployeeDTO>
  • Description: Creates a new employee.

• Get Employee by ID

  • URL: /api/employees/{id}
  • Method: GET
  • Response: ApiResponse<EmployeeDTO>
  • Description: Retrieves an employee by their ID.

• Update Employee

  • URL: /api/employees/{id}
  • Method: PUT
  • Request Body: EmployeeDTO
  • Response: ApiResponse<EmployeeDTO>
  • Description: Updates an existing employee.

• Delete Employee

  • URL: /api/employees/{id}
  • Method: DELETE
  • Response: ApiResponse<Void>
  • Description: Deletes an employee by their ID.

Exception Handling

• Resource Not Found

  • Status: 404
  • Response: ApiResponse<ApiError>
  • Description: Returned when a requested resource is not found.

• Internal Server Error

  • Status: 500
  • Response: ApiResponse<ApiError>
  • Description: Returned when an internal server error occurs.

• Method Argument Not Valid

  • Status: 400
  • Response: ApiResponse<ApiError>
  • Description: Returned when input validation fails.

How to Run

1. Clone the repository.
2. Navigate to the project directory.
3. Run mvn spring-boot:run.

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