Spring Boot not autowiring #Repository - spring

Question

I'm trying to configure a datasource with Spring Boot but I'm getting org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'authenticationServiceImpl': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: private com.mycompany.myapp.repository.UserRepository com.mycompany.myapp.service.AuthenticationServiceImpl.userRepository; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [com.mycompany.myapp.repository.UserRepository] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {#org.springframework.beans.factory.annotation.Autowired(required=true)}
These is my project structure:
Main Class:
package com.mycompany.myapp;
#ComponentScan(basePackageClasses = {com.mycompany.myapp.domain.user.User.class,
com.mycompany.myapp.repository.UserRepository.class,
com.mycompany.myapp.service.AuthenticationServiceImpl.class})
public class Application {
public static void main(String[] args) {
SpringApplication.run(Application.class, args);
}
}
Domain Class:
package com.mycompany.myapp.domain.user
#Entity
public class User {
#Id
#GeneratedValue
private long id;
#Column(nullable = false)
private String name;
#Column(nullable = false)
private String lastName;
#Column(nullable = false)
private String password;
#Column(nullable = false)
private String email;
public User() {}
public User(String email, String password){
this.email = email;
this.password = password;
}
}
Repository:
package com.mycompany.myapp.repository;
public interface UserRepository extends CrudRepository<User, Long> {
List<User> findByLastName(String lastName);
}
Controller
package com.mycompany.myapp.service;
#RestController
public class AuthenticationServiceImpl implements AuthenticationService {
#Autowired
private UserRepository userRepository;
#RequestMapping("/add")
public User add(){
User user = new User();
user.setName("Juan");
user.setLastName("Sarpe");
user.setEmail("email#gmail.com");
userRepository.save(user);
return user;
}
}
application.properties
spring.datasource.url:jdbc:mysql://localhost:3306/mydb
spring.datasource.username=user
spring.datasource.password=pass
spring.datasource.driverClassName=com.mysql.jdbc.Driver
spring.jpa.hibernate.ddl-auto=update
I guess my app is not detecting my #Repository annotation on UserRepository. As far as I know, Spring Boot will automatically set my class as #Repository because it is extending CrudRepository. What am I doing wrong? (Notice that my Application class is on top of packages hierarchy).

Answer 1

In main class of spring boot you have to use this below annotation :
#SpringBootApplication
#ComponentScan(basePackages = "basepackage")
#EntityScan(basePackages ="basepackage")
#EnableAutoConfiguration
#EnableJpaRepositories(basePackages = "basepackage")
In Repository layer use below annotation :
import org.springframework.stereotype.Repository;
import org.springframework.transaction.annotation.Transactional;
#Transactional
#Repositor
If you have any service layer then use below annotation in the implementation class:
import org.springframework.stereotype.Service;
#Service

Answer 2

Have you tried #EnableJpaRepositories in your configuration ?

Answer 3

The standard way to configure is to create a base marker repository interface and provide that in the component scan.
public interface RepositoryPackage {
}
Keep the interface RepositoryPackage in the same package as UserRepository.
#ComponentScan(basePackageClasses= "RepositoryPackage.class")
public class Application {
public static void main(String[] args) {
SpringApplication.run(Application.class, args);
}
}