关于项目中@Transactional不生效的原因追溯

最近写一段代码涉及到两个表的操作时候用了@Transactional注解,并手动抛出一个运行时异常,结果并未生效.于是写了一个最简单的demo并抛出异常观察是否生效,代码如下,然而就是这么简单的一个插入数据异常回滚都未生效,感到很奇怪.

@LoggerManage(type = LogType.UPDATE, description = "插入地方平台的信息以及和车辆的绑定关系")
@DataSourceSelect(name = DataSourceNames.EIGHT)
@Transactional
public void insertPlatformAndUpdateRelation2Car(String name, String ip, int port,List<String> clbhs) {
    TBLOCALFORWARDPLATFORM tblocalforwardplatform = new TBLOCALFORWARDPLATFORM(null, name, ip, port);
    tblocalforwardplatformMapper.insertSelective(tblocalforwardplatform);
    throw new RuntimeException();
}

以下为这次运行的堆栈

java.lang.RuntimeException
	at com.sudy.zjgykt.gb32960.web.service.LocalForwardPlatformServiceGB.insertPlatformAndUpdateRelation2Car(LocalForwardPlatformServiceGB.java:60)
	at com.sudy.zjgykt.gb32960.web.service.LocalForwardPlatformServiceGB$$FastClassBySpringCGLIB$$d1bc28c2.invoke(<generated>)
	at org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:204)
	at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.invokeJoinpoint(CglibAopProxy.java:747)
	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:163)
	at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:294)
	at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:98)
	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:185)
	at org.springframework.aop.aspectj.MethodInvocationProceedingJoinPoint.proceed(MethodInvocationProceedingJoinPoint.java:89)
	at com.sudy.zjgykt.spring.aop.DataSourceAspect.around(DataSourceAspect.java:36)
	at sun.reflect.GeneratedMethodAccessor265.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at org.springframework.aop.aspectj.AbstractAspectJAdvice.invokeAdviceMethodWithGivenArgs(AbstractAspectJAdvice.java:644)
	at org.springframework.aop.aspectj.AbstractAspectJAdvice.invokeAdviceMethod(AbstractAspectJAdvice.java:633)
	at org.springframework.aop.aspectj.AspectJAroundAdvice.invoke(AspectJAroundAdvice.java:70)
	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:174)
	at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:92)
	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:185)
	at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:689)
	at com.sudy.zjgykt.gb32960.web.service.LocalForwardPlatformServiceGB$$EnhancerBySpringCGLIB$$314fa063.insertPlatformAndUpdateRelation2Car(<generated>)
	at com.sudy.zjgykt.gb32960.web.controller.LocalForwardPlatformControllerGB.insertPlatformAndUpdateRelation2Car(LocalForwardPlatformControllerGB.java:37)
	at com.sudy.zjgykt.gb32960.web.controller.LocalForwardPlatformControllerGB$$FastClassBySpringCGLIB$$4a3124ae.invoke(<generated>)
	at org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:204)
	at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.invokeJoinpoint(CglibAopProxy.java:747)
	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:163)
	at org.springframework.aop.aspectj.MethodInvocationProceedingJoinPoint.proceed(MethodInvocationProceedingJoinPoint.java:89)
	at com.sudy.zjgykt.spring.aop.UpdateUserInfoAspect.handleRequestMapping(UpdateUserInfoAspect.java:50)
	at sun.reflect.GeneratedMethodAccessor314.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at org.springframework.aop.aspectj.AbstractAspectJAdvice.invokeAdviceMethodWithGivenArgs(AbstractAspectJAdvice.java:644)
	at org.springframework.aop.aspectj.AbstractAspectJAdvice.invokeAdviceMethod(AbstractAspectJAdvice.java:633)
	at org.springframework.aop.aspectj.AspectJAroundAdvice.invoke(AspectJAroundAdvice.java:70)
	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:174)
	at org.springframework.aop.aspectj.MethodInvocationProceedingJoinPoint.proceed(MethodInvocationProceedingJoinPoint.java:89)
	at com.sudy.zjgykt.spring.aop.PermissionAspect.addAroundLogger(PermissionAspect.java:61)
	at sun.reflect.GeneratedMethodAccessor453.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at org.springframework.aop.aspectj.AbstractAspectJAdvice.invokeAdviceMethodWithGivenArgs(AbstractAspectJAdvice.java:644)
	at org.springframework.aop.aspectj.AbstractAspectJAdvice.invokeAdviceMethod(AbstractAspectJAdvice.java:633)
	at org.springframework.aop.aspectj.AspectJAroundAdvice.invoke(AspectJAroundAdvice.java:70)
	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:174)
	at org.springframework.aop.framework.adapter.MethodBeforeAdviceInterceptor.invoke(MethodBeforeAdviceInterceptor.java:52)
	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:174)
	at org.springframework.aop.framework.adapter.MethodBeforeAdviceInterceptor.invoke(MethodBeforeAdviceInterceptor.java:52)
	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:174)
	at org.springframework.aop.aspectj.MethodInvocationProceedingJoinPoint.proceed(MethodInvocationProceedingJoinPoint.java:89)
	at com.sudy.zjgykt.spring.aop.AuthenticationAspectj.permissionCheck(AuthenticationAspectj.java:65)
	at sun.reflect.GeneratedMethodAccessor312.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at org.springframework.aop.aspectj.AbstractAspectJAdvice.invokeAdviceMethodWithGivenArgs(AbstractAspectJAdvice.java:644)
	at org.springframework.aop.aspectj.AbstractAspectJAdvice.invokeAdviceMethod(AbstractAspectJAdvice.java:633)
	at org.springframework.aop.aspectj.AspectJAroundAdvice.invoke(AspectJAroundAdvice.java:70)
	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:174)
	at org.springframework.aop.aspectj.MethodInvocationProceedingJoinPoint.proceed(MethodInvocationProceedingJoinPoint.java:89)
	at com.sudy.zjgykt.spring.aop.ServerTimingAspect.handleRequestMapping(ServerTimingAspect.java:55)
	at sun.reflect.GeneratedMethodAccessor311.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at org.springframework.aop.aspectj.AbstractAspectJAdvice.invokeAdviceMethodWithGivenArgs(AbstractAspectJAdvice.java:644)
	at org.springframework.aop.aspectj.AbstractAspectJAdvice.invokeAdviceMethod(AbstractAspectJAdvice.java:633)
	at org.springframework.aop.aspectj.AspectJAroundAdvice.invoke(AspectJAroundAdvice.java:70)
	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:174)
	at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:92)
	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:185)
	at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:689)
	at com.sudy.zjgykt.gb32960.web.controller.LocalForwardPlatformControllerGB$$EnhancerBySpringCGLIB$$2df2ec14.insertPlatformAndUpdateRelation2Car(<generated>)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:209)
	at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:136)
	at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:102)
	at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:877)
	at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:783)
	at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87)
	at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:991)
	at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:925)
	at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:974)
	at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:877)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:661)
	at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:851)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:742)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
	at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
	at com.alibaba.druid.support.http.WebStatFilter.doFilter(WebStatFilter.java:123)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
	at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:99)
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
	at org.springframework.web.filter.HttpPutFormContentFilter.doFilterInternal(HttpPutFormContentFilter.java:109)
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
	at org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:81)
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
	at org.springframework.session.web.http.SessionRepositoryFilter.doFilterInternal(SessionRepositoryFilter.java:146)
	at org.springframework.session.web.http.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:81)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
	at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:200)
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:198)
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96)
	at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:496)
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:140)
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:81)
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:87)
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:342)
	at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:803)
	at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)
	at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:790)
	at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1459)
	at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
	at java.lang.Thread.run(Thread.java:748)

其中LocalForwardPlatformServiceGB和LocalForwardPlatformControllerGB是我的Service和Controller,DataSourceAspect,UpdateUserInfoAspect,PermissionAspect,AuthenticationAspectj,ServerTimingAspect为切面类,可以看到堆栈偏上部分这些切面部分的堆栈是基于一层层的代理实现的,整个堆栈是基于tomcat里的一个线程执行产生的.我们现在来将目标放到7,8,9行.

进入第九行的类ReflectiveMethodInvocation,代码如下所示代码中interceptorOrInterceptionAdvice 就是 TransactionInterceptor 的实例,this 是 ReflectiveMethodInvocation 对象，成员对象包含 LocalForwardPlatformServiceGB 类、insertPlatformAndUpdateRelation2Car() 方法、入参和代理对象等

TransactionInterceptor的invoke方法

TransactionAspectSupport的invokeWithinTransaction方法. 其中invocation.proceedWithInvocation()会调用我的LocalForwardPlatformServiceGB类里面的insertPlatformAndUpdateRelation2Car并抛出了异常,因此会进入catch代码块执行完completeTransactionAfterThrowing逻辑再将异常抛出. TransactionAspectSupport的completeTransactionAfterThrowing方法.此处事务回滚时候发现用的是kafka的事务管理器,所以数据库的数据还是插入了进去. 获取到的是kafka的事务管理器,我突然想到当时在kafka的配置类中配置了kafka的事务管理器,果断注释一波.结果源码debug源码回滚获取到的还是kafka的事务管理器.

我又想到了我的配置里面加了关于kafka事务的配置,打开org.springframework.boot.autoconfigure.kafka.KafkaAutoConfiguration kafka的自动配置类有如下代码,而我的配置文件里面的确配置了这样的配置路径,将配置文件的事务配置注释掉,再重新启动程序,debug到源码回滚的地方,这次终于获取到的是DataSourceTransacationManager了,代码也能正常回滚了.

@Bean
@ConditionalOnProperty(name = "spring.kafka.producer.transaction-id-prefix")
@ConditionalOnMissingBean
public KafkaTransactionManager<?, ?> kafkaTransactionManager(
      ProducerFactory<?, ?> producerFactory) {
   return new KafkaTransactionManager<>(producerFactory);
}

那么现在我们可以确定的是:如果没加kafka的事务管理器,的确程序启动后的事务回滚就会用上DataSourceTransacationManager作为默认的事务管理器,而如果程序里有kafka事务管理器一块的配置,那么就会以kafka的事务管理器作为事务回滚时候的管理器.

@LoggerManage(type = LogType.UPDATE, description = "插入地方平台的信息以及和车辆的绑定关系")
@DataSourceSelect(name = DataSourceNames.EIGHT)
@Transactional(rollbackFor = Exception.class,transactionManager= "dataSourceTransactionManager")
public void insertPlatformAndUpdateRelation2Car(String name, String ip, int port,List<String> clbhs) {
    TBLOCALFORWARDPLATFORM tblocalforwardplatform = new TBLOCALFORWARDPLATFORM(null, name, ip, port);
    tblocalforwardplatformMapper.insertSelective(tblocalforwardplatform);
    localForwardPlatformServiceGB.updatePlatformRelation2Car(tblocalforwardplatform.getId(), clbhs);
}

@Transactional注解可以指定具体的事物管理器,我们将这个方法指定为DataSourceTransacationManager,再来重启程序debug看看现象,结果报错如下 org.springframework.beans.factory.NoSuchBeanDefinitionException: No bean named 'dataSourceTransactionManager' available: No matching PlatformTransactionManager bean found for qualifier 'dataSourceTransactionManager' - neither qualifier match nor bean name match! 看来是容器里面没有DataSourceTransacationManager这个类,我们找到关于自动注入DataSourceTransacationManager的配置类DataSourceTransactionManagerAutoConfiguration看下相关代码如下

@Bean
@ConditionalOnMissingBean(PlatformTransactionManager.class)
public DataSourceTransactionManager transactionManager(
      DataSourceProperties properties) {
   DataSourceTransactionManager transactionManager = new DataSourceTransactionManager(
         this.dataSource);
   if (this.transactionManagerCustomizers != null) {
      this.transactionManagerCustomizers.customize(transactionManager);
   }
   return transactionManager;
}

代码显示说明只有在容器中没有PlatformTransactionManager.class的情况下才会自动注入一个DataSourceTransactionManager实例,而我们注入了kafka相关的事务管理器就会导致这个条件不满足.因此想要两个事务管理去兼有,我们只能自己手动注入一个DataSourceTransactionManager了.

注释完重启后发现还是报错

Description:

Field scheduledTaskService in com.sudy.zjgykt.BusGatewayApplication required a single bean, but 2 were found: - kafkaTransactionManager: defined by method 'kafkaTransactionManager' in class path resource [com/sudy/zjgykt/configure/kafka/KafkaServerConfiguration.class] - transactionManager: defined by method 'transactionManager' in class path resource [com/sudy/zjgykt/spring/DynamicDataSourceConfig.class]

Action:

Consider marking one of the beans as @Primary, updating the consumer to accept multiple beans, or using @Qualifier to identify the bean that should be consumed

给kafka的事务管理器加上@Primary,再重启测试,数据库的事务终于可以回滚了,kafka的事务由于项目里暂时没用到,没有测试,应该问题不大.至于此处为啥加上@Primary就好了,有点疑惑明明两个方法名不同,注入容器的实体类名字应该不同啊,marker下,猜测可能和@Transactional如何获取具体的事务管理器源码有关(TransactionAspectSupport.determineTransactionManager方法),也许是哪个地方通过PlatformTransactionManager父类接口直接注入事务管理器会导致这个错误. @autowired PlatformTransactionManager platformTransactionManager;

/** kafka开启事务管理器*/
@Bean
@Primary
public KafkaTransactionManager<String, String> kafkaTransactionManager() {
    return new KafkaTransactionManager<>(producerFactory());
}

另外TransactionAutoConfiguration类中关于编程式事务类TransactionTemplate的自动注入要求存在单例的PlatformTransactionManager对象,按照以上的流程走下来,容易中是存在两个PlatformTransactionManager的,所以如果想用TransactionTemplate进行编程式事务,我们也需手动创建并塞入容器中.

@Bean
@DependsOn("transactionManager")
public TransactionTemplate transactionTemplate() {
    //参见TransactionAutoConfiguration类的TransactionTemplateConfiguration,要求容器中存在单例PlatformTransactionManager才会注入编程式事务的TransactionTemplate的bean实例
    DataSourceTransactionManager dataSourceTransactionManager = SpringContextUtils.getBean(DataSourceTransactionManager.class);
    return new TransactionTemplate(dataSourceTransactionManager);
}

部分参见于此博客zhuanlan.zhihu.com/p/554203148;