任何人都可以帮助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问题事情,的确非常感谢!
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)
这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; }
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,它将回退步骤和写入作业存储库的数据。这意味着您将不会保留数据以重新启动作业。因此,使用事务性单元测试非常棘手。
看4.3.1节。Spring Batch文档的JobRepository的事务配置。
我们也遇到了这个问题,因此我们避免事务性测试,直到找到解决方案为止。可以使用乘法事务管理器,但是我还没有尝试过,请参见如何使用Spring + DBUnit + JUnit配置多事务管理器