[英]Use declarative Transaction in Thread created using Executor Service
我有一个带有注释@Controller的服务层类,并且在服务调用中正在线程中生成,并且正在更新数据库中的某些内容。 我在线程的方法中使用了@transaction注解。 但是我收到了休眠异常“找不到会话”。 我是否需要向Thread添加任何注释?
org.hibernate.HibernateException:在org.hibernate.internal.SessionFactoryImpl.getCurrentSession(SessionFactoryImpl.java:978)的org.hibernate.internal.SessionFactoryImpl.getCurrentSession(SessionFactoryImpl.java:978)上的org.springframework.orm.hibernate4.SpringSessionContext.currentSession(SpringSessionContext.java:97)上找不到当前线程的会话com.mediaiq.cms.persistence.AgencyRepository.getById(AgencyRepository.java:20)上的.mediaiq.commons.persistence.BaseRepository.getCurrentSession(BaseRepository.java:30)在com.mediaiq.mail.client.AgencyLookupReportByDayClient.emailAgencyBgencyLookupConfirm .java:84),位于com.mediaiq.mail.client.AgencyLookupReportByDayClient.sendemailreport(AgencyLookupReportByDayClient.java:67),位于com.mediaiq.mail.client.BaseMailClient.run(BaseMailClient.java:222),位于java.util.concurrent。 Java的Executors $ RunnableAdapter.call(Executors.java:471)在java.util.concurrent.FutureTask $ Sync.innerRun(FutureTask.java:334)在java.util.concurrent.FutureTask.run(FutureTask.java:166)在Java .util.concurrent.ThreadPoolExecutor.run java.util.concurrent.ThreadPoolExecutor $ Worker.run(ThreadPoolExecutor.java:615)处的Worker(ThreadPoolExecutor.java:1145)在java.lang.Thread.run(Thread.java:722)处
@Repository
public class BaseMailClient implements Runnable {
public BaseMailClient() {
}
public BaseMailClient(PlacementsRepository placementsRepository, SessionFactory sessionFactory, String sessionID) {
this.placementsRepository = placementsRepository;
this.sessionFactory = sessionFactory;
this.sessionID = sessionID;
}
public BaseMailClient(AgencyRepository agencyRepository, SessionFactory sessionFactory, String sessionID) {
this.agencyRepository = agencyRepository;
this.sessionFactory = sessionFactory;
this.sessionID = sessionID;
}
private String sessionID = null;
@Autowired
private SessionFactory sessionFactory;
@Autowired
private PlacementsRepository placementsRepository;
@Autowired
private AgencyRepository agencyRepository;
final static Logger logger =LoggerFactory.getLogger(BaseMailClient.class);
@Override
public void run()
{
sendemailreport();
}
@Transactional
public void sendemailreport()
{
checkSessionID();
try {
emailAgencyLookupConfirmation();
emailAgencyLookup();
}
catch (IOException | FailedToCreateTempFile e) {
logger.info("Failed To mail due to exception :" + e.getMessage());
}
catch (Throwable e) {
logger.info("Failed To mail due to exception :" + e.getMessage());
}
}
}
服务等级:
@Transactional
@Controller
@RequestMapping(URLEndPoints.EMAIL)
public class SendMailService {
@Autowired
PlacementsRepository placementsRepository;
@Autowired
AgencyRepository agencyRepository;
/**
*
*/
@Autowired
private SessionFactory sessionFactory;
@Autowired
private ThreadPoolTaskExecutor mailJobExecutor;
final static Logger logger = LoggerFactory.getLogger(SendMailService.class);
@RequestMapping(method = RequestMethod.POST, value = URLEndPoints.EMAIL_AGENCY_LOOKUP_BY_DAY, produces = "application/json")
@ResponseBody
public String emailAgencyLookupByDay(ServletRequest request,@PathVariable("agencyID") Integer agencyID,
@PathVariable("startDate") @DateTimeFormat(iso = DateTimeFormat.ISO.DATE) Date startDate,
@PathVariable("endDate") @DateTimeFormat(iso = DateTimeFormat.ISO.DATE) Date endDate )
{
logger.debug("POST:SendEmail:AgencyLookup");
String sessionId = getSessionIDFromCookie(request);
BaseClient mailServiceClient = new BaseClient(getAgencyRepository(), getSessionFactory(), sessionId);
logger.debug("Getting Executor Instance");
mailJobExecutor.submit(mailServiceClient);
logger.debug("Submitted to Executor");
return "SUCCESS";
}
}
这里有些错误。
首先,您自己创建了BaseClient
对象,因此Spring无法添加@Transactional
行为。
BaseClient mailServiceClient = new BaseClient(getAgencyRepository(), getSessionFactory(), sessionId);
相反,您应该让Spring为您创建那种类型的bean。 使用prototype
范围。
其次,您需要仔细阅读Spring文档中有关Spring代理机制的条目。 不幸的是,从同一个类中的非事务方法中调用@Transactional
方法时,您不能指望任何事务行为,这就是您在这里所做的
@Override
public void run()
{
sendemailreport();
}
@Transactional
public void sendemailreport()
{
sendemailreport
在this
引用上调用, this
引用是对象本身,而不是代理。 因此,它将没有任何交易行为。
在Spring外部创建的线程将不会附加休眠会话。 您将需要将新的休眠会话手动附加到线程;
Session session = SessionFactoryUtils.openSession(sessionFactory);
try
{
TransactionSynchronizationManager.bindResource(sessionFactory, new SessionHolder(session));
}
catch(Exception e)
{
Logger.debug("Session already bound");
}
(您将需要注入sessionFactory)。
在线程完成之前,请确保会话未绑定;
public static void closeSession(Session se)
{
try
{
try
{
TransactionSynchronizationManager.unbindResource(sessionFactory);
}
finally
{
if (se != null && se.isOpen() && se.isConnected())
{
SessionFactoryUtils.closeSession(se);
}
}
}
catch (HibernateException e)
{
Logger.fatal("Could not close session", e);
}
}
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