Spring Boot Hibernate RestFull Service PostgreSQL - spring-mvc

Question

I'm new user of Spring and I want develop a RestFull Service with Hibernate-PostGreSQL and Spring Boot. I try to learn with the documentation of Spring but I have lot of problem to deploy a simple service.
I don't use XML file properties but a Java Class.
Here are my different files :
PersistanceJPAConfig.java :
package com.spring.configuration;
import javax.sql.DataSource;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.jdbc.datasource.DriverManagerDataSource;
import org.springframework.orm.jpa.JpaTransactionManager;
import org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean;
import org.springframework.orm.jpa.vendor.Database;
import org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter;
#Configuration
public class PersistenceJPAConfig {
#Bean
public DataSource dataSource() {
DriverManagerDataSource driver = new DriverManagerDataSource();
driver.setDriverClassName("org.postgresql.Driver");
driver.setUrl("jdbc:postgresql://localhost:5432/test");
driver.setUsername("test");
driver.setPassword("test");
return driver;
}
#Bean
public LocalContainerEntityManagerFactoryBean entityManagerFactory() {
HibernateJpaVendorAdapter vendorAdapter = new HibernateJpaVendorAdapter();
vendorAdapter.setDatabase(Database.POSTGRESQL);
vendorAdapter.setGenerateDdl(true);
LocalContainerEntityManagerFactoryBean factory = new LocalContainerEntityManagerFactoryBean();
factory.setJpaVendorAdapter(vendorAdapter);
factory.setPackagesToScan(getClass().getPackage().getName());
factory.setDataSource(dataSource());
return factory;
}
#Bean
#Autowired
public JpaTransactionManager transactionManager() {
JpaTransactionManager txManager = new JpaTransactionManager();
txManager.setEntityManagerFactory(entityManagerFactory().getObject());
return txManager;
}
}
I have a classic model and here is the Repository :
package com.spring.persistence.repositories;
import com.spring.persistence.model.ApplicationUser;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.data.jpa.repository.JpaRepository;
import org.springframework.stereotype.Repository;
#Repository
#Qualifier(value = "applicationUserRepository")
public interface ApplicationUserRepository extends JpaRepository<ApplicationUser,Long>{
}
A Simple service :
package com.spring.persistence.service;
import com.spring.persistence.model.ApplicationUser;
import com.spring.persistence.repositories.ApplicationUserRepository;
import java.util.List;
import javax.annotation.PostConstruct;
import javax.transaction.Transactional;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
#Service
#Transactional
public class ApplicationUserService {
private final ApplicationUserRepository applicationUserRepository;
#Autowired
public ApplicationUserService(ApplicationUserRepository applicationUserRepository) {
this.applicationUserRepository = applicationUserRepository;
}
public ApplicationUser createUser(String username, String type, String country)
{
ApplicationUser user = new ApplicationUser(username,type,country);
return applicationUserRepository.saveAndFlush(user);
}
public List<ApplicationUser> getAllUser()
{
return applicationUserRepository.findAll();
}
public ApplicationUser getUser(Long id)
{
ApplicationUser user = null;
if(id != null)
{
user = applicationUserRepository.findOne(id);
}
return user;
}
public boolean deleteUser(Long id)
{
if(id != null)
{
try{
applicationUserRepository.delete(id);
return true;
}
catch(IllegalArgumentException ex)
{
ex.printStackTrace();
return false;
}
}
else
{
System.out.println("Id is null");
return false;
}
}
}
And finally the WebController :
#RestController
#RequestMapping(value = "/applicationuser")
public class ApplicationUserController {
#Autowired
private ApplicationUserService applicationUserService;
#RequestMapping(value="/",method = RequestMethod.GET)
#ResponseBody
public ApplicationUser index()
{
return applicationUserService.createUser("test", "test", "test");
}
}
It's possible is missing lot of things (Annotation,Initializer,Code) but I'm here to learn and any advices can help me.
Thanks for your answers

Answer 1

Spring Data REST
This project will allow you to achieve your goals with significantly less boilerplate code.
Follow the Accessing JPA Data with REST guide which demonstrates how to configure Spring Boot + Spring Data REST with absolutely minimal configuration.
Once you have a basic understanding, then you can add more functionality to meet your business requirements.
Detailed information is provided in the Spring Data REST Documentation