Java-Machine-test--Nimap-Task

1. Spring Boot Setup:

   • Spring Boot provides a convenient way to create stand-alone, production-grade Spring-based applications. You can start by creating a new Spring Boot project using Spring Initializr or your preferred IDE.
   • Make sure to include the necessary dependencies for Spring Web, Spring Data JPA, and any database driver (e.g., H2, MySQL, PostgreSQL).

2. REST Controllers:

   • Create REST controllers to handle the CRUD operations for both categories and products.
   • Annotate your controller methods with @GetMapping, @PostMapping, @PutMapping, and @DeleteMapping to define the API endpoints.

3. Database Configuration (RDB):

   • Configure your database connection in the application.properties or application.yml file.
   • Use an RDBMS (Relational Database Management System) like MySQL, PostgreSQL, or H2 (for development/testing).

4. Annotation-Based Configuration:

   • Spring Boot encourages annotation-based configuration over XML.
   • Use annotations like @Entity, @Table, @Column, and @OneToMany to define your data model and relationships.

5. Category CRUD Operations:

   • Implement the following APIs for categories:
     • GET /api/categories?page=3: Retrieve all categories (with pagination).
     • POST /api/categories: Create a new category.
     • GET /api/categories/{id}: Retrieve a category by ID.
     • PUT /api/categories/{id}: Update a category by ID.
     • DELETE /api/categories/{id}: Delete a category by ID.

6. Product CRUD Operations:

   • Implement similar APIs for products:
     • GET /api/products?page=2: Retrieve all products (with pagination).
     • POST /api/products: Create a new product.
     • GET /api/products/{id}: Retrieve a product by ID.
     • PUT /api/products/{id}: Update a product by ID.
     • DELETE /api/products/{id}: Delete a product by ID.

7. One-to-Many Relationship:

   • Define a one-to-many relationship between categories and products.
   • Annotate the appropriate fields in your entities (e.g., @OneToMany in the Category entity).

8. Server-Side Pagination:

   • Implement server-side pagination by using query parameters (e.g., page, size, sort).
   • In your repository, use methods like findAll(Pageable pageable) to retrieve paginated results.

9. Fetching Product Details with Category:

   • When fetching a single product, ensure that the response includes the relevant category details.
   • You can use DTOs (Data Transfer Objects) to customize the response format.