I am using Spring and Hibernate and I am successfully autowiring a Repository inside the contructor of a Service class. When i try to add @Transactional methods in my Service class i get an AopConfigException that it is about the generation of CGLib class.
My Configuration consists in 3 files.
An AppInitializer class that implements WebApplicationInitializer , a WebMvcConfig class that extends WebMvcConfigurerAdapter and lastly a PersistentContext class.
AppInitializer
public class AppInitializer implements WebApplicationInitializer {
private static final String CONFIG_LOCATION = "com.project.app.config";
private static final String MAPPING_URL = "/";
@Override
public void onStartup(ServletContext servletContext) throws ServletException {
WebApplicationContext context = getContext();
servletContext.addListener(new ContextLoaderListener(context));
ServletRegistration.Dynamic dispatcher = servletContext.addServlet("DispatcherServlet",
new DispatcherServlet(context));
dispatcher.setLoadOnStartup(1);
dispatcher.addMapping(MAPPING_URL);
}
private AnnotationConfigWebApplicationContext getContext() {
AnnotationConfigWebApplicationContext context = new AnnotationConfigWebApplicationContext();
context.setConfigLocation(CONFIG_LOCATION);
return context;
}
WebMvcConfig
@EnableWebMvc
@Configuration
@ComponentScan(basePackages = { "com.project.app" })
public class WebMvcConfig extends WebMvcConfigurerAdapter {
@Autowired
private Environment env;
@Override
public void addResourceHandlers(ResourceHandlerRegistry registry) {
registry.addResourceHandler("/resources/**").addResourceLocations("/resources/");
}
@Override
public void addViewControllers(ViewControllerRegistry registry) {
registry.addViewController("/").setViewName("hello");
}
@Bean
public ApplicationContextProvider applicationContextProvider() {
return new ApplicationContextProvider();
}
}
PersistentContext
@Component
@EnableJpaRepositories("com.project.app.services.repositories")
@EnableTransactionManagement
@PropertySource("classpath:application.properties")
public class PersistenceContext {
@Autowired
private Environment env;
@Bean
@Primary
public DataSource dataSource() throws ClassNotFoundException {
DataSource ds = new DataSource();
ds.setUrl(env.getProperty(SystemSettings.DS_URL));
ds.setUsername(env.getProperty(SystemSettings.DS_USERNAME));
ds.setPassword(env.getProperty(SystemSettings.DS_PASSWORD));
ds.setDriverClassName(env.getProperty(SystemSettings.DS_DRIVER));
return ds;
}
@Bean
LocalContainerEntityManagerFactoryBean entityManagerFactory(DataSource dataSource) {
LocalContainerEntityManagerFactoryBean entityManagerFactoryBean = new LocalContainerEntityManagerFactoryBean();
entityManagerFactoryBean.setDataSource(dataSource);
entityManagerFactoryBean.setJpaVendorAdapter(new HibernateJpaVendorAdapter());
entityManagerFactoryBean.setPackagesToScan("com.project.app.services.entities");
// .. Set Properties..
entityManagerFactoryBean.setJpaProperties(jpaProperties);
return entityManagerFactoryBean;
}
@Bean
JpaTransactionManager transactionManager(EntityManagerFactory entityManagerFactory) {
JpaTransactionManager transactionManager = new JpaTransactionManager();
transactionManager.setEntityManagerFactory(entityManagerFactory);
return transactionManager;
}
}
The Repository INTERFACE extends CrudRepository
StopRepository
@Repository
@RepositoryRestResource(collectionResourceRel = "stop", path = "stop")
public interface StopRepository extends CrudRepository<StopJPA, Long> {
@Override
StopJPA save(StopJPA persisted);
}
The Entity class.
StopJPA
@Entity
@Table(name = "stop")
public class StopJPA implements Serializable {
@Id
@GeneratedValue(strategy = GenerationType.AUTO)
@Column(name = "id")
private Long id;
@Column(name = "stop_description")
private String stopDescription;
@Column(name = "id_stop", nullable = false)
private String idStop;
public StopJPA() {
}
public StopJPA(String stopDescription, String idStop) {
this.stopDescription = stopDescription;
this.idStop = idStop;
}
// .. Getters & Setters ..
}
And the Service class implementation:
StopService
@Service
final class RepoStopService {
private StopRepository stopRepository;
@Autowired
RepoStopService(StopRepository stopRepository) {
this.stopRepository = stopRepository;
}
@Transactional
public StopDTO create(StopDTO newEntry) {
StopJPA created = new StopJPA(newEntry.getStopDescription(), newEntry.getIdStop());
created = stopRepository.save(created);
return EntitiesConverter.mapEntityIntoDTO(created);
}
}
Unfortunately when i try to run it on server i get this exception:
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'repoStopService' defined in file [C:..\RepoStopService.class]: Initialization of bean failed; Caused by: org.springframework.aop.framework.AopConfigException:Could not generate CGLIB subclass of class [class ..RepoStopService]: Common causes of this problem include using a final class or a non-visible class; nested exception is java.lang.IllegalArgumentException: Cannot subclass final class class ..RepoStopService
I understand that Spring uses either JDK proxy or CGLib. The default behavior if we autowire an interface (here its the repository) is to have a JDK proxy? what need to be changed in order to make it work?
