5
votes

I'm using Spring Data JPA with Hibernate JPA provider in my project. Inside my service I have a method, which saves an entity in database and than using returned object I try to fetch more details about this entity. As a result, details are not fetched. In logs I see only insert statement, without select for details.

Here is my code:

Configuration:

@Configuration
@Profile("test")
@EnableJpaRepositories(basePackages = {"pl.lodz.uml.sonda.common.repositories"})
@EnableTransactionManagement
@PropertySource(value = "classpath:db.test.properties")
public class PersistenceConfigTest {
  @Autowired
  private Environment env;
  @Value("classpath:sql/test-initialization.sql")
  private Resource sqlInitializationScript;

  @Bean
  public DataSource dataSource() {
    BasicDataSource dataSource = new BasicDataSource();

    dataSource.setDriverClassName(env.getProperty("jdbc.driverClassName"));
    dataSource.setUrl(env.getProperty("jdbc.url"));
    dataSource.setUsername(env.getProperty("jdbc.username"));
    dataSource.setPassword(env.getProperty("jdbc.password"));

    return dataSource;
  }

  @Bean
  public LocalContainerEntityManagerFactoryBean entityManagerFactory() {
    LocalContainerEntityManagerFactoryBean entityManagerFactory = new LocalContainerEntityManagerFactoryBean();
    HibernateJpaVendorAdapter adapter = new HibernateJpaVendorAdapter();

    adapter.setShowSql(env.getProperty("hibernate.showSQL", Boolean.class));
    adapter.setGenerateDdl(env.getProperty("hibernate.hbm2ddl", Boolean.class));

    entityManagerFactory.setDataSource(dataSource());
    entityManagerFactory.setPackagesToScan("pl.lodz.uml.sonda.common.domains");
    entityManagerFactory.setJpaVendorAdapter(adapter);

    Properties properties = new Properties();
    properties.put("hibernate.hbm2ddl.auto", env.getProperty("hibernate.hbm2ddl.auto"));

    entityManagerFactory.setJpaProperties(properties);

    return entityManagerFactory;
  }

  @Bean(name = "transactionManager")
  public PlatformTransactionManager platformTransactionManager() {
    EntityManagerFactory entityManagerFactory = entityManagerFactory().getObject();
    return new JpaTransactionManager(entityManagerFactory);
  }

  @Bean
  public DataSourceInitializer dataSourceInitializer() {
    ResourceDatabasePopulator populator = new ResourceDatabasePopulator();
    populator.addScript(sqlInitializationScript);

    DataSourceInitializer initializer = new DataSourceInitializer();
    initializer.setDataSource(dataSource());
    initializer.setDatabasePopulator(populator);
    initializer.setEnabled(env.getProperty("db.initialization", Boolean.class));

    return initializer;
  }

  @Bean
  public ProbeService probeService() {
    return new ProbeServiceImpl();
  }
}

Service:

@Service
@Transactional
public class ProbeServiceImpl implements ProbeService {
  @Autowired
  private ProbeRepository probeRepository;

  @Override
  public Probe saveProbe(Probe probe) {
    Probe saved = probeRepository.save(probe);
    saved.getGroup().getName();

    return saved;
  }
}

Simple test:

@RunWith(SpringJUnit4ClassRunner.class)
@ActiveProfiles("test")
@ContextConfiguration(classes = {PersistenceConfigTest.class})
@Transactional
@TransactionConfiguration(defaultRollback = true)
@TestExecutionListeners({
  DependencyInjectionTestExecutionListener.class,
  DirtiesContextTestExecutionListener.class,
  TransactionalTestExecutionListener.class
})
public class ProbeServiceImplTest {
  @Autowired
  private ProbeService probeService;

  @Test
  public void test() {
    Probe probe = ProbeFixtures.generateProbeSample("Test one");
    probe.setGroup(ProbeFixtures.generateProbeGroupSample(1));

    Probe saved = probeService.saveProbe(probe);
    System.out.println("Group name: " + saved.getGroup().getName());
  }
}

Entities:

@Entity
@Table(name = "probes")
public class Probe {
  @Id
  @GeneratedValue(strategy = GenerationType.AUTO)
  @Column(name = "probe_id")
  private long probeId;

  @Column(name = "probe_title", nullable = false)
  private String title;

  @Column(name = "probe_description", nullable = true)
  private String description;

  @ManyToOne(fetch = FetchType.EAGER)
  @JoinColumn(name = "probe_group_id", nullable = true)
  private ProbeGroup group;

  @OneToOne(fetch = FetchType.EAGER)
  @JoinColumn(name = "probe_image_id", nullable = true)
  private ProbeFile image;

  @Column(name = "probe_published_date", nullable = false)
  private Date published;

  @Column(name = "probe_last_updated_date", nullable = false)
  private Date updated;

  @Column(name = "probe_expire_date", nullable = false)
  private Date expires;

  @Column(name = "probe_is_active", nullable = false)
  private boolean isActive;

  @OneToMany(mappedBy = "probe", fetch = FetchType.LAZY)
  private List<Question> questions;

  @OneToMany(mappedBy = "probe", fetch = FetchType.LAZY)
  private List<Vote> votes;

  public Probe() {
    questions = new LinkedList<>();
    votes = new LinkedList<>();
  }
  // getters & setters ...


@Entity
@Table(name = "probe_groups")
public class ProbeGroup {
  @Id
  @GeneratedValue(strategy = GenerationType.AUTO)
  @Column(name = "probe_group_id")
  private long probeGroupId;

  @Column(name = "probe_group_name", nullable = false, unique = true)
  private String name;

  @Column(name = "probe_group_description", nullable = true)
  private String description;

  @OneToMany(mappedBy = "group", fetch = FetchType.LAZY)
  private List<Probe> probes;

  public ProbeGroup() {
    probes = new LinkedList<>();
  }
  // getters & setters ...

And few last logs lines:

Hibernate: insert into probes (probe_description, probe_expire_date, probe_group_id, probe_image_id, probe_is_active, probe_published_date, probe_title, probe_last_updated_date) values (?, ?, ?, ?, ?, ?, ?, ?)
Group name: null

I also tried to run spring data jpa method - getOne(id) after save(), but also it does not work (insert statement invoked, select not);

UPDATE: I removed @Transactional annotaion from my service and from test. Now when I'm saving an entity and then fetching the same entity, I have two sql statements in logs: insert and then select. Maybe my problem is because of wrong persistence/transaction configuration. What You think?

3
I'm having a similar issue: my transaction log is updated via trigger and the log entries are modeled Entities, but the relationship is not loaded after saveAndFlush(), so I have to pass off the ID and fetch as if I didn't already have the object. Yay Spring.user1944491
First: Don't use Transactional annotations in Spring (data) tests. Spring creates for you a transaction and rollbacks the transaction. Second: A physical flush comes after a commit. Methods annotated with Transactional will be committed after leaving a method (if this method have not raised an exception).Josh
Please, write below how you solved this issue.vugar_saleh

3 Answers

2
votes

This might be a bit outdated, but I ran into the same issue and found that hibernate 2nd level cache was the issue.

1
votes

The save() method may or may not write your changes to database immediately. If you want to commit the changes immediately, you will need to use T saveAndFlush(T entity) method.

-1
votes

The print statement is returning null because, only the getName() returns null. That means your data is getting saved, and the object is returned back. If the "saved" object was null, it should have thrown a null pointer exception.