(对Spring还不太熟悉)
我需要一个同时带有 @Scheduled
和 @Transactional
注解的服务方法,以便我可以在其中调用DAO。
声明式事务已启用,事务管理器是基于Hibernate会话工厂的 org.springframework.orm.hibernate3.HibernateTransactionManager
。
服务类没有实现任何接口,因此使用了CGLIB代理。
一般情况下这个设置很好用(从Web栈即Struts调用的方法),但是当调度程序调用此方法时会引发异常。
以下是相关代码:
服务方法(该类名为ClientWakeAndTerminateManager
):
@Scheduled(initialDelay = 5000, fixedRateString = "${rmi.server.threads.clientsScheduleManagement.rate}")
@Transactional(readOnly = true)
public void runCheck(){
//Call a read-only DAO method (the DAO is @Autowired as a class field)
//do some stuff with the data loaded from DB
}
我应用程序上下文的相关部分:
<!-- switch on the transactional infrastructure -->
<tx:annotation-driven transaction-manager="transactionManager" proxy-target-class="true"/>
<!-- Utility class to execute transactional code where use of annotation is not possible -->
<bean class="org.springframework.transaction.support.TransactionTemplate" id="txTemplate">
<constructor-arg name="transactionManager" ref="transactionManager"/>
</bean>
<!-- Transaction manager based on Hibernate -->
<bean id="transactionManager" class="org.springframework.orm.hibernate3.HibernateTransactionManager">
<property name="sessionFactory" ref="hibernateSessionFactory"/>
</bean>
异常堆栈跟踪:
[ERROR] : Unexpected error occurred in scheduled task.
org.springframework.transaction.TransactionSystemException: Could not commit Hibernate transaction; nested exception is org.hibernate.TransactionException: Transaction not successfully started
at org.springframework.orm.hibernate3.HibernateTransactionManager.doCommit(HibernateTransactionManager.java:661)
at org.springframework.transaction.support.AbstractPlatformTransactionManager.processCommit(AbstractPlatformTransactionManager.java:755)
at org.springframework.transaction.support.AbstractPlatformTransactionManager.commit(AbstractPlatformTransactionManager.java:724)
at org.springframework.transaction.interceptor.TransactionAspectSupport.commitTransactionAfterReturning(TransactionAspectSupport.java:475)
at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:270)
at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:94)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)
at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:631)
at ch.unine.sitel.lis.rmi.shared.ClientWakeAndTerminateManager$$EnhancerByCGLIB$$d8be4f34.runCheck(<generated>)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:601)
at org.springframework.scheduling.support.ScheduledMethodRunnable.run(ScheduledMethodRunnable.java:64)
at org.springframework.scheduling.support.DelegatingErrorHandlingRunnable.run(DelegatingErrorHandlingRunnable.java:53)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
at java.util.concurrent.FutureTask$Sync.innerRunAndReset(FutureTask.java:351)
at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:178)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:178)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
at java.lang.Thread.run(Thread.java:722)
Caused by: org.hibernate.TransactionException: Transaction not successfully started
at org.hibernate.transaction.JDBCTransaction.commit(JDBCTransaction.java:127)
at org.springframework.orm.hibernate3.HibernateTransactionManager.doCommit(HibernateTransactionManager.java:657)
... 22 more
堆栈跟踪显示使用了事务代理,所以我不明白这个异常。求助!
编辑:
我尝试通过以下方式分离 @Transactional
和 @Scheduled
注释:
- 创建包含
@Scheduled
方法的新类/bean - 将我的服务注入到此 bean 中
- 从原始方法中删除
@Scheduled
,但保留@Transactional
但我仍然遇到相同的异常。我还尝试在 DAO 方法上放置 @Transactional
并从服务方法中删除它:结果相同。