Я запускаю приложение Spring Boot wiht @enableTransActionManagement < /code> и хочу использовать @Transactional (readonly = true) < /code> для некоторых запросов базы данных. < /p>
Но я получаю сообщение об ошибке. /> myspringbootapplication.java
@SpringBootApplication
@EnableTransactionManagement
@ComponentScan("com.deutscheboerse.regrephub")
@EntityScan(basePackages = "com.deutscheboerse.regrephub")
@EnableJpaRepositories(basePackages = "com.deutscheboerse.regrephub")
@Slf4j
public class MySpringBootApplication
{
... Some @Autowired variables ...
public static void main(String[] args)
{
SpringApplication.run(MySpringBootApplication.class, args);
}
...
}
< /code>
myspringbootapplicationconfiguration.java
@Configuration
@EnableEncryptableProperties
@EnableTransactionManagement
@EnableAsync
@Slf4j
public class MySpringBootApplicationConfiguration
{
... Some @Autowired variables ...
@Bean
@ConfigurationProperties(prefix = "spring.datasource")
public DataSource dataSource()
{
return DataSourceBuilder
.create(this.dataSourceProperties.getClassLoader())
.url(this.dataSourceProperties.getUrl())
.username(this.dataSourceProperties.getUsername())
.password(this.dataSourceProperties.getPassword())
.build();
}
...
}
< /code>
mybeandao.java
@Repository
public interface MyBeanDao extends JpaRepository
{
@QueryHints(value = @QueryHint(name = HINT_FETCH_SIZE, value = "" + Integer.MIN_VALUE))
@Query(value = "SELECT * FROM MY_TABLE", nativeQuery = true)
@Transactional(readOnly = true)
Stream streamAll();
}
< /code>
mybeanservice.java
@Service
@Slf4j
public class MyBeanService extends AbstractService
{
@Autowired
public MyBeanService(...)
{
...
}
@Override
@Transactional(readOnly = true, propagation = Propagation.SUPPORTS)
public void handleRequest(Object request, Message msg)
{
try (Stream data = myBeanDao.streamAll())
{
...
}
catch (Exception e)
{
...
}
}
}
< /code>
Когда я запускаю свою SpringbootApplication, я получу следующие сообщения журнала /ошибки: < /p>
[TransactionInterceptor:474] Getting transaction for [org.springframework.data.jpa.repository.support.SimpleJpaRepository.streamAll]
[TransactionInterceptor:517] Completing transaction for [org.springframework.data.jpa.repository.support.SimpleJpaRepository.streamAll] after exception: org.springframework.dao.InvalidDataAccessApiUsageException: You're trying to execute a streaming query method without a surrounding transaction that keeps the connection open so that the Stream can actually be consumed. Make sure the code consuming the stream uses @Transactional or any other way of declaring a (read-only) transaction.
[RuleBasedTransactionAttribute:131] Applying rules to determine whether transaction should rollback on org.springframework.dao.InvalidDataAccessApiUsageException: You're trying to execute a streaming query method without a surrounding transaction that keeps the connection open so that the Stream can actually be consumed. Make sure the code consuming the stream uses @Transactional or any other way of declaring a (read-only) transaction.
[RuleBasedTransactionAttribute:148] Winning rollback rule is: null
[RuleBasedTransactionAttribute:153] No relevant rollback rule found: applying default rules
< /code>
Сначала JPA открывает транзакцию и немедленно закройте ее исключением, что я хочу выполнить метод потокового запроса без окружающей транзакции.
кто -то был раньше?! < /p>
Подробнее здесь: https://stackoverflow.com/questions/483 ... nsactional
