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使用Spring@Transactional进行TestNG多线程测试

testng spring unit-testing multithreading java

Gennady Shumakher · 技术社区 · 16 年前

当我试图在threadPoolSize=x,invocationCount=y的并行线程中运行TestNG注释时,问题就出现了。

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)

... 有人面对过这个问题吗?

代码如下:

@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自己的事务实例时,AbstractTransactionalTestNGSpringContextTests似乎只为主线程维护事务。解决此问题的唯一方法是扩展AbstractTestNGSpringContextTests,并以编程方式(而不是@Transactional annotation)为每个方法维护事务(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 回复 | 直到 16 年前

Community Mohan Dere 9 年前

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

Such 14 年前

您不认为这是因为org.springframework.test.context.TestContextManager不是线程安全的(请参阅 https://jira.springsource.org/browse/SPR-5863 )?

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

然而,这种错误会随机失效。我扩展了AbstractTransactionalTestNGSpringContextTests,包括:

@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);
}

现在它就像一个符咒。我已经等不及Spring3.2了,这样它就可以完全并行化了!