I'm a beginner in Spring Boot and JPA. I'm developing an application using these technologies, but I've run into a problem. When I run the application, I encounter a 'Not a managed type' exception related to my User entity class.
Error starting ApplicationContext. To display the conditions report re-run your application with 'debug' enabled.
2023-07-31 15:11:07.786 ERROR 15380 --- \[ main\] o.s.boot.SpringApplication : Application run failed
org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'loginController' defined in file \[C:\\1-project\\target\\classes\\com\\example1\\project\\Login\\LoginController.class\]: Unsatisfied dependency expressed through constructor parameter 0; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'userService' defined in file \[C:\\1-project\\target\\classes\\com\\example1\\project\\User\\UserService.class\]: Unsatisfied dependency expressed through constructor parameter 0; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'userRepository' defined in com.example1.project.User.UserRepository defined in @EnableJpaRepositories declared on Application: Invocation of init method failed; nested exception is java.lang.IllegalArgumentException: Not a managed type: class com.example1.project.User.User
User entity class:
package com.example1.project.User;
import jakarta.persistence.*;
import jakarta.validation.constraints.Email;
import jakarta.validation.constraints.NotBlank;
@Entity
@Table(name = "users")
public class User
{
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
private Long id;
@NotBlank
private String name;
@Email
@NotBlank
private String email;
@NotBlank
private String username;
@NotBlank
private String password;
public User() {}
// Getters and Setters
public Long getId() {
return id;
}
public void setId(Long id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getUsername() {
return username;
}
public void setUsername(String username) {
this.username = username;
}
public String getEmail() {
return email;
}
public void setEmail(String email) {
this.email = email;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
}
UserRepository:
package com.example1.project.User;
import org.springframework.data.jpa.repository.JpaRepository;
public interface UserRepository extends JpaRepository<User, Long> {
User findByUsername(String username);
}
UserService:
package com.example1.project.User;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder;
import org.springframework.stereotype.Service;
import java.util.List;
@Service
public class UserService {
private final UserRepository userRepository;
@Autowired
public UserService(UserRepository userRepository) {
this.userRepository = userRepository;
}
public User authenticateUser(String username, String password) {
User user = userRepository.findByUsername(username);
if (user != null) {
BCryptPasswordEncoder passwordEncoder = new BCryptPasswordEncoder();
if (passwordEncoder.matches(password, user.getPassword())) {
return user;
}
}
return null;
}
// Implement service methods using the repository methods
public List<User> getAllUsers() {
return userRepository.findAll();
}
public User getUserById(Long id) {
return userRepository.findById(id).orElse(null);
}
public User saveUser(User user) {
user.setPassword(new BCryptPasswordEncoder().encode(user.getPassword()));
return userRepository.save(user);
}
public void deleteUser(Long id) {
userRepository.deleteById(id);
}
}
LoginController:
package com.example1.project.Login;
import com.example1.project.User.User;
import com.example1.project.User.UserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.HttpStatus;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
@RestController
@RequestMapping("/api/login")
public class LoginController {
private final UserService userService;
@Autowired
public LoginController(UserService userService) {
this.userService = userService;
}
@PostMapping
public ResponseEntity<?> login(@RequestBody LoginRequest loginRequest) {
// Extract username and password from the login request payload
String username = loginRequest.getUsername();
String password = loginRequest.getPassword();
User authenticatedUser = userService.authenticateUser(username, password);
if (authenticatedUser != null) {
// User is authenticated, return user data or a token (if using token-based authentication)
return ResponseEntity.ok(authenticatedUser);
} else {
// Invalid credentials, return an error response
return ResponseEntity.status(HttpStatus.UNAUTHORIZED).body("Invalid username or password");
}
}
}
I initially suspected that there might be an issue with the way I had annotated my entity classes, so I double-checked them to make sure I had used the correct annotations. I was expecting that if the annotations were correct, the application would run without any 'Not a managed type' errors. However, even though my entity classes seem to be correctly annotated, the error still persists
This is my project structure:
src
├── main
│ └── java
│ └── com.example1.project
│ └──Login(subpackage)
│ └──Order(subpackage)
│ └──Product(subpackage)
│ └──User(subpackage)
│ └──Application(main class)
│ └──CorsConfig(class)
│ └──SecurityConfiguration(class)
└── test
The new error:
In my mysql table called product ,this table has 4 columns called id,description,name,price,i wanted to send from postman to mysql this data:
{
"name": "Case",
"price": 19.99
}
But when i press Send, i get 401 Unauthorized in postman ,the url is http://localhost:8080/api/products.
I added a class called SecurityConfiguration thinking that if i set the username "user" and the password "password" i could go to PostMan→Authorization and add the user and password as credentials but i get the same error:
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.security.core.userdetails.User;
import org.springframework.security.core.userdetails.UserDetails;
import org.springframework.security.provisioning.InMemoryUserDetailsManager;
import javax.sql.DataSource;
@Configuration
public class SecurityConfiguration {
@Bean
public InMemoryUserDetailsManager userDetailsService() {
UserDetails user = User.withDefaultPasswordEncoder()
.username("user")
.password("password")
.roles("USER")
.build();
return new InMemoryUserDetailsManager(user);
}
}
This is my ProductController class:
package com.example1.project.Product;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.*;
import java.util.List;
@RestController
@RequestMapping("/api/products")
public class ProductController {
private final ProductService productService;
@Autowired
public ProductController(ProductService productService) {
this.productService = productService;
}
@GetMapping
public List<Product> getAllProducts() {
return productService.getAllProducts();
}
@GetMapping("/{id}")
public Product getProductById(@PathVariable Long id) {
return productService.getProductById(id);
}
@GetMapping("/search")
public List<Product> searchProducts(@RequestParam String keyword) {
return productService.searchProducts(keyword);
}
@PostMapping
public Product addProduct(@RequestBody Product product) {
return productService.saveProduct(product);
}
@PutMapping("/{id}")
public Product updateProduct(@PathVariable Long id, @RequestBody Product product) {
product.setId(id);
return productService.saveProduct(product);
}
@DeleteMapping("/{id}")
public void deleteProduct(@PathVariable Long id) {
productService.deleteProduct(id);
}
}
When i start my application i get this in the console:
2023-08-01T18:05:24.940+03:00 INFO 13520 --- [nio-8080-exec-1] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring DispatcherServlet 'dispatcherServlet'
2023-08-01T18:05:24.941+03:00 INFO 13520 --- [nio-8080-exec-1] o.s.web.servlet.DispatcherServlet : Initializing Servlet 'dispatcherServlet'
2023-08-01T18:05:24.943+03:00 INFO 13520 --- [nio-8080-exec-1] o.s.web.servlet.DispatcherServlet : Completed initialization in 2 ms
2023-08-01T18:13:33.563+03:00 WARN 13520 --- [l-1 housekeeper] com.zaxxer.hikari.pool.HikariPool : HikariPool-1 - Thread starvation or clock leap detected (housekeeper delta=7m32s427ms71µs900ns).
In your Security Configuration class you also need a bean of SecurityFilterChain that permits httpBasic authentication, its the reason why you get 401 unauthorized, think i was helpful
Just have a look at documentation Configuration at HttpSecurity module