使用Spring @Transactional进行TestNG多线程测试

时间:2010-02-04 18:11:27

标签: java multithreading unit-testing spring testng

我正在使用TestNG来测试使用AbstractTransactionTestNGSpringContextTests作为基类的持久性Spring模块(JPA + Hibernate)。所有重要的部分@Autowired,@ TransactionConfiguration,@ Transaction都能正常工作。

当我尝试使用threadPoolSize = x,invocationCount = y TestNG注释在并行线程中运行测试时出现问题。

WARNING: Caught exception while allowing TestExecutionListener [org.springframework.test.context.transaction.TransactionalTestExecutionListener@174202a] 
to process 'before' execution of test method [testCreate()] for test instance [DaoTest] java.lang.IllegalStateException:
Cannot start new transaction without ending existing transaction: Invoke endTransaction() before startNewTransaction().
at org.springframework.test.context.transaction.TransactionalTestExecutionListener.beforeTestMethod(TransactionalTestExecutionListener.java:123)
at org.springframework.test.context.TestContextManager.beforeTestMethod(TestContextManager.java:374)
at org.springframework.test.context.testng.AbstractTestNGSpringContextTests.springTestContextBeforeTestMethod(AbstractTestNGSpringContextTests.java:146)

... 有人遇到过这个问题吗?

以下是代码:

@TransactionConfiguration(defaultRollback = false)
@ContextConfiguration(locations = { "/META-INF/app.xml" })
public class DaoTest extends AbstractTransactionalTestNGSpringContextTests {

@Autowired
private DaoMgr dm;

@Test(threadPoolSize=5, invocationCount=10)
public void testCreate() {
    ...
    dao.persist(o);
    ...
}
...

更新:当所有其他测试线程都没有获得自己的事务实例时,似乎AbstractTransactionalTestNGSpringContextTests仅为主线程维护事务。解决这个问题的唯一方法是扩展AbstractTestNGSpringContextTests并按编程方式维护事务(而不是@Transactional注释)每个方法(即使用TransactionTemplate):

@Test(threadPoolSize=5, invocationCount=10)
public void testMethod() {
    new TransactionTemplate(txManager).execute(new TransactionCallbackWithoutResult() {
        @Override
        protected void doInTransactionWithoutResult(TransactionStatus status) {
            // transactional test logic goes here
        }
    }
}

2 个答案:

答案 0 :(得分:2)

需要在同一个线程中启动事务,这里有更多细节:

Spring3/Hibernate3/TestNG: some tests give LazyInitializationException, some don't

答案 1 :(得分:2)

您认为这不是来自org.springframework.test.context.TestContextManager不是线程安全的(请参阅https://jira.springsource.org/browse/SPR-5863)?

当我想要并行启动Transactional TestNG测试时,我遇到了同样的问题,你可以看到Spring实际上试图将事务绑定到正确的线程。

然而,这种错误随机失败。我将AbstractTransactionalTestNGSpringContextTests扩展为:

@Override
@BeforeMethod(alwaysRun = true)
protected synchronized void springTestContextBeforeTestMethod(
        Method testMethod) throws Exception {
    super.springTestContextBeforeTestMethod(testMethod);
}

@Override
@AfterMethod(alwaysRun = true)
protected synchronized void springTestContextAfterTestMethod(
        Method testMethod) throws Exception {
    super.springTestContextAfterTestMethod(testMethod);
}

(关键是同步......)

它现在像魅力一样工作。我不能等到Spring 3.2,所以它可以完全平行!