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Building a Full-Stack Application with Angular and Spring Boot

Introduction:

In this article, we will explore the process of building a full-stack web application using Angular and Spring Boot. We’ll cover various aspects, including setting up the project, configuring the backend, handling REST requests, integrating with a database (ArangoDB), and implementing CRUD operations. Let’s dive into the details of what we accomplished today.

1. Setting up the Project:

To get started, we created a new Angular project using the Angular CLI by running the following command:

ng new my-app

Similarly, we set up a new Spring Boot project using Maven by creating a new Maven project in our preferred IDE.

2. Configuring Angular Proxy:

To establish communication between the Angular frontend and the Spring Boot backend, we configured the Angular proxy. In the proxy.conf.js file, we added the following configuration:

const PROXY_CONFIG = [ { context: [ "/api" // Update this to match your backend API path ], target: "http://localhost:7001", // Update this with your backend server URL secure: false, logLevel: "debug" } ]; module.exports = PROXY_CONFIG;

3. Implementing User Service in Angular:

In the Angular application, we created a UserService to handle API requests related to user management. Here’s an example implementation of the createUser method:

createUser(user: User): Observable<User> { return this.http.post<User>(`${environment.apiUrl}/users`, user); }

4. Configuring Spring Boot Backend:

In the Spring Boot backend, we added the necessary dependencies to our pom.xml file, including Spring Security, ArangoDB Java driver, and Spring Data ArangoDB. In the application.yml file, we configured the ArangoDB connection properties:

spring: data: arangodb: hosts: localhost:8529 user: ******** pass: ******** database: ********

5. Creating User Entity and Repository:

We defined a User entity class in the Spring Boot backend to represent the user data model. Here’s an example:

@Data @NoArgsConstructor @AllArgsConstructor @Document("users") public class User { @Id private String id; // Other fields and annotations } @Repository public interface UserRepository extends ArangoRepository<User, String> { // Additional methods if needed }

6. Implementing User Controller:

To handle user-related REST requests, we implemented a UserController in the Spring Boot backend. Here’s an example implementation of the createUser endpoint:

@RestController @RequestMapping("/api/users") public class UserController { private final UserRepository userRepository; public UserController(UserRepository userRepository) { this.userRepository = userRepository; } @PostMapping public User createUser(@RequestBody User user) { boolean emailExists = userRepository.existsByEmail(user.getEmail()); boolean usernameExists = userRepository.existsByUsername(user.getUsername()); if (emailExists || usernameExists) { User existingUser = userRepository.findByEmailOrUsername(user.getEmail(), user.getUsername()); if (existingUser != null) { existingUser.setEmail(user.getEmail()); existingUser.setUsername(user.getUsername()); // Update other fields as needed return userRepository.save(existingUser); } } return userRepository.save(user); } // Other endpoints for CRUD operations }

Conclusion:

Today, we made significant progress in building a full-stack application using Angular and Spring Boot. We set up the project structure, configured the Angular proxy, implemented user management functionality, and integrated with ArangoDB for data storage. This serves as a solid foundation for further development and expansion of our application.

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