Spring Transactions - 在未经检查的异常（RuntimeException）后防止回滚

Question

我无法阻止事务在RuntimeException 之后回滚。

我的环境是 Spring 4.1 + Hibernate 3.6 + JTA (WebSphereUowTransactionManager) 在 Websphere 8.0 上运行。

“doStuff”案例：有效

首先，一个表现符合预期的简单案例。由于我捕获了 RuntimeException，事务提交并成功创建了新资源。

@Service("fooService")
public class FooServiceImpl implements IFooService {

    @Transactional
    @Override
    public void doStuff(Resource res){
        authService.createResource(res, "ADMIN");
        try {
            throw new RuntimeException("SOMETHING");
        } catch (RuntimeException e) {
            e.printStackTrace();
        }
    }

“doStuff2”案例：有效

下一个也可以。我声明了 noRollbackFor 并让我们提交事务：

    @Transactional(noRollbackFor=RuntimeException.class)
    @Override
    public void doStuff2(Resource res){
        authService.createResource(res, "ADMIN");
        throw new RuntimeException("SOMETHING");
    }

“doStuff12”案例：不起作用

最后是有问题的。不同之处在于，在这种情况下，第二次调用authService.createResource 会引发异常。仅供参考，authService.createResource 仅标记为@Transactional，因此默认传播配置适用，它应该加入调用服务的事务。

    @Transactional(noRollbackFor=RuntimeException.class)
    @Override
    public void doStuff12(Resource res){
        
        authService.createResource(res, "ADMIN");
        try{
            res.setName("EXISTING-RESOURCE");
            authService.createResource(res, "ADMIN");
        }catch(RuntimeException e){
            e.printStackTrace();
        }
    }

尽管捕获了 RuntimeException 并声明了 noRollbackFor 属性，但事务总是回滚。有什么解释吗？？

日志跟踪信息：

org.springframework.transaction.jta.WebSphereUowTransactionManager        DEBUG - Creating new transaction with name [null]: PROPAGATION_REQUIRED,ISOLATION_DEFAULT; '',+com.myorg.webapps.exception.ElementoYaExistente
org.springframework.transaction.jta.WebSphereUowTransactionManager        DEBUG - Invoking WebSphere UOW action: type=1, join=false
org.springframework.transaction.support.TransactionSynchronizationManager TRACE - Initializing transaction synchronization
org.springframework.transaction.interceptor.TransactionInterceptor        TRACE - Getting transaction for [com.myorg.test.service.impl.FooServiceImpl.doStuff12]
org.springframework.transaction.jta.WebSphereUowTransactionManager        DEBUG - Creating new transaction with name [null]: PROPAGATION_REQUIRED,ISOLATION_DEFAULT; ''
org.springframework.transaction.jta.WebSphereUowTransactionManager        DEBUG - Invoking WebSphere UOW action: type=1, join=true
org.springframework.transaction.interceptor.TransactionInterceptor        TRACE - Getting transaction for [com.myorg.authmgr.service.impl.AuthorizationServiceImpl.createResource]
org.springframework.transaction.jta.WebSphereUowTransactionManager        DEBUG - Returned from WebSphere UOW action: type=1, join=true
org.springframework.transaction.jta.WebSphereUowTransactionManager        DEBUG - Creating new transaction with name [null]: PROPAGATION_REQUIRED,ISOLATION_DEFAULT; ''
org.springframework.transaction.jta.WebSphereUowTransactionManager        DEBUG - Invoking WebSphere UOW action: type=1, join=true
org.springframework.transaction.interceptor.TransactionInterceptor        TRACE - Getting transaction for [com.myorg.authmgr.service.impl.AuthorizationServiceImpl.createResource]
org.springframework.transaction.interceptor.RuleBasedTransactionAttribute TRACE - Applying rules to determine whether transaction should rollback on java.lang.Runtime: Couldn't create the resource, it already exists: EXISTING-RESOURCE
org.springframework.transaction.interceptor.RuleBasedTransactionAttribute TRACE - Winning rollback rule is: null
org.springframework.transaction.interceptor.RuleBasedTransactionAttribute TRACE - No relevant rollback rule found: applying default rules
org.springframework.transaction.jta.WebSphereUowTransactionManager        DEBUG - Returned from WebSphere UOW action: type=1, join=true
org.springframework.transaction.jta.WebSphereUowTransactionManager        TRACE - Triggering beforeCommit synchronization
org.springframework.transaction.jta.WebSphereUowTransactionManager        TRACE - Triggering beforeCompletion synchronization
org.springframework.transaction.support.TransactionSynchronizationManager TRACE - Clearing transaction synchronization
org.springframework.transaction.jta.WebSphereUowTransactionManager        DEBUG - Returned from WebSphere UOW action: type=1, join=false

Answer 1

据我所知，一旦从事务方法中抛出运行时异常并被事务拦截器拦截，该事务就会被标记为仅回滚。即使这个事务方法是从另一个事务方法调用的。

这对我来说很有意义：如果内部方法无法从异常中恢复，它就无法恢复，并且外部方法不应该像什么都没发生一样。

如果您希望事务不回滚，则可以

• 使内部方法成为非事务性方法
• 配置内部方法不回滚此异常
• 有两个内部方法：
  • 一个是事务性的，旨在在还没有事务时调用，它只是委托给第二个
  • 不是事务性的，旨在作为现有事务的一部分调用