单元测试中Spring Batch JobRepository的事务问题

Question

任何人都可以帮我找出以下异常的解决方案,我想我只是不太了解事务传播机制,这阻碍了我理解下面显示的异常消息的真实含义,所以请帮助我理解整个事情,非常感谢你!

java.lang.IllegalStateException: Existing transaction detected in JobRepository. Please fix this and try again (e.g. remove @Transactional annotations from client).
at org.springframework.batch.core.repository.support.AbstractJobRepositoryFactoryBean$1.invoke(AbstractJobRepositoryFactoryBean.java:164)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)
at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:202)
at com.sun.proxy.$Proxy15.createJobExecution(Unknown Source)
at org.springframework.batch.core.launch.support.SimpleJobLauncher.run(SimpleJobLauncher.java:111)
at TestJob.testExcelParserTasklet(TestJob.java:36)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.testng.internal.MethodInvocationHelper.invokeMethod(MethodInvocationHelper.java:80)
at org.testng.internal.MethodInvocationHelper$1.runTestMethod(MethodInvocationHelper.java:169)
at org.springframework.test.context.testng.AbstractTestNGSpringContextTests.run(AbstractTestNGSpringContextTests.java:158)

以下是导致上述异常的代码:

public class TestJob extends BaseTest {
@Test
public void testExcelParserTasklet() throws JobParametersInvalidException, JobExecutionAlreadyRunningException, JobRestartException, JobInstanceAlreadyCompleteException, NoSuchJobException {
    Job job = jobRegistry.getJob("parseExcelJob");
    jobLauncher.run(job, new JobParameters());
    }
}

这是BaseTest:

@ContextConfiguration("classpath:application-context.xml")
public abstract class BaseTest extends AbstractTransactionalTestNGSpringContextTests
{
    @Autowired
    protected JobRegistry jobRegistry;

    @Autowired
    protected JobLauncher jobLauncher;
}

Answer 1

AbstractTransactionalTestNGSpringContextTests将所有测试方法包装在事务中.Spring批处理作业存储库不喜欢与其他人共享其事务管理器.逻辑很简单,如果您在步骤失败时与步骤事务管理器共享作业事务管理器,它将回滚步骤和写入作业存储库的数据.这意味着您不会保留数据以重新启动作业.所以使用Transactional Unit测试很棘手.

请看4.3.1节.Spring Batch文档的JobRepository的事务配置.

我们也有这个问题,所以我们避免交易测试,直到我们找到解决方案.使用多个事务管理器可能有效,但我还没有尝试过,但是看到如何使用Spring + DBUnit + JUnit配置多个事务管理器