@Transactional标识类或方法,使方法被执行时使用事务方式执行,这里只讨论PROXY方法增强方法。使用@EnableTransactionManagement,默认model=AdviceMode.PROXY,通过@Import(TransactionManagementConfigurationSelector.class)来判断在加载时注册PROXY不是ASPECTJ相关类。PROXY相关类有AutoProxyRegistrar和ProxyTransactionManagementConfiguration。AutoProxyRegistrar作用是通过EnableTransactionManagement.proxyTargetClass值判断使用CGLIB或是Java interface-based proxies。使用Java interface-based proxies时AnnotationAwareAspectJAutoProxyCreator,AnnotationAwareAspectJAutoProxyCreator是一个BeanPostProcessor实现类。使用CGLIB也是注册AnnotationAwareAspectJAutoProxyCreator并且将proxyTargetClass=true,如下AopConfigUtils.forceAutoProxyCreatorToUseClassProxying()
AnnotationAwareAspectJAutoProxyCreator.wrapIfNecessary()
AnnotationAwareAspectJAutoProxyCreator是一个BeanPostProcessor实现类,它的相应方法会在容器管理每个对象实例化不同阶段会执行。wrapIfNecessary()方法在postProcessAfterInitialization()方法调用,主要是判断实例化对象是否容器所有Advisor所要作用对象,如@Transactional标识的方法或类的对象匹配BeanFactoryTransactionAttributeSourceAdvisor。
AnnotationTransactionAttributeSource.determineTransactionAttribute()
判断传入的方法是否含@Transactional标识,返回TransactionAttribute
下面是AnnotationAwareAspectJAutoProxyCreator(AbstractAutoProxyCreator).wrapIfNecessary()的stack
Thread [main] (Suspended (breakpoint at line 348 in AbstractAutoProxyCreator))
owns: ConcurrentHashMap<K,V> (id=2343)
owns: Object (id=2107)
AnnotationAwareAspectJAutoProxyCreator(AbstractAutoProxyCreator).wrapIfNecessary(Object, String, Object) line: 348
AnnotationAwareAspectJAutoProxyCreator(AbstractAutoProxyCreator).postProcessAfterInitialization(Object, String) line: 298
DefaultListableBeanFactory(AbstractAutowireCapableBeanFactory).applyBeanPostProcessorsAfterInitialization(Object, String) line: 435
DefaultListableBeanFactory(AbstractAutowireCapableBeanFactory).initializeBean(String, Object, RootBeanDefinition) line: 1721
DefaultListableBeanFactory(AbstractAutowireCapableBeanFactory).doCreateBean(String, RootBeanDefinition, Object[]) line: 581
DefaultListableBeanFactory(AbstractAutowireCapableBeanFactory).createBean(String, RootBeanDefinition, Object[]) line: 498
DefaultListableBeanFactory(AbstractBeanFactory).lambda$doGetBean$0(String, RootBeanDefinition, Object[]) line: 305
48361312.getObject() line: not available
DefaultListableBeanFactory(DefaultSingletonBeanRegistry).getSingleton(String, ObjectFactory<?>) line: 233
DefaultListableBeanFactory(AbstractBeanFactory).doGetBean(String, Class<T>, Object[], boolean) line: 303
DefaultListableBeanFactory(AbstractBeanFactory).getBean(String, Class<T>) line: 198
CommonAnnotationBeanPostProcessor.autowireResource(BeanFactory, CommonAnnotationBeanPostProcessor$LookupElement, String) line: 512
CommonAnnotationBeanPostProcessor.getResource(CommonAnnotationBeanPostProcessor$LookupElement, String) line: 483
CommonAnnotationBeanPostProcessor$ResourceElement.getResourceToInject(Object, String) line: 617
CommonAnnotationBeanPostProcessor$ResourceElement(InjectionMetadata$InjectedElement).inject(Object, String, PropertyValues) line: 172
InjectionMetadata.inject(Object, String, PropertyValues) line: 89
CommonAnnotationBeanPostProcessor.postProcessPropertyValues(PropertyValues, PropertyDescriptor[], Object, String) line: 317
DefaultListableBeanFactory(AbstractAutowireCapableBeanFactory).populateBean(String, RootBeanDefinition, BeanWrapper) line: 1353
DefaultListableBeanFactory(AbstractAutowireCapableBeanFactory).doCreateBean(String, RootBeanDefinition, Object[]) line: 579
DefaultListableBeanFactory(AbstractAutowireCapableBeanFactory).createBean(String, RootBeanDefinition, Object[]) line: 498
DefaultListableBeanFactory(AbstractBeanFactory).lambda$doGetBean$0(String, RootBeanDefinition, Object[]) line: 305
48361312.getObject() line: not available
DefaultListableBeanFactory(DefaultSingletonBeanRegistry).getSingleton(String, ObjectFactory<?>) line: 233
DefaultListableBeanFactory(AbstractBeanFactory).doGetBean(String, Class<T>, Object[], boolean) line: 303
DefaultListableBeanFactory(AbstractBeanFactory).getBean(String, Class<T>) line: 198
CommonAnnotationBeanPostProcessor.autowireResource(BeanFactory, CommonAnnotationBeanPostProcessor$LookupElement, String) line: 512
CommonAnnotationBeanPostProcessor.getResource(CommonAnnotationBeanPostProcessor$LookupElement, String) line: 483
CommonAnnotationBeanPostProcessor$ResourceElement.getResourceToInject(Object, String) line: 617
CommonAnnotationBeanPostProcessor$ResourceElement(InjectionMetadata$InjectedElement).inject(Object, String, PropertyValues) line: 172
InjectionMetadata.inject(Object, String, PropertyValues) line: 89
CommonAnnotationBeanPostProcessor.postProcessPropertyValues(PropertyValues, PropertyDescriptor[], Object, String) line: 317
DefaultListableBeanFactory(AbstractAutowireCapableBeanFactory).populateBean(String, RootBeanDefinition, BeanWrapper) line: 1353
DefaultListableBeanFactory(AbstractAutowireCapableBeanFactory).doCreateBean(String, RootBeanDefinition, Object[]) line: 579
DefaultListableBeanFactory(AbstractAutowireCapableBeanFactory).createBean(String, RootBeanDefinition, Object[]) line: 498
DefaultListableBeanFactory(AbstractBeanFactory).lambda$doGetBean$0(String, RootBeanDefinition, Object[]) line: 305
48361312.getObject() line: not available
DefaultListableBeanFactory(DefaultSingletonBeanRegistry).getSingleton(String, ObjectFactory<?>) line: 233
DefaultListableBeanFactory(AbstractBeanFactory).doGetBean(String, Class<T>, Object[], boolean) line: 303
DefaultListableBeanFactory(AbstractBeanFactory).getBean(String) line: 193
DefaultListableBeanFactory.preInstantiateSingletons() line: 747
AnnotationConfigApplicationContext(AbstractApplicationContext).finishBeanFactoryInitialization(ConfigurableListableBeanFactory) line: 861
AnnotationConfigApplicationContext(AbstractApplicationContext).refresh() line: 542
SpringApplication.refresh(ApplicationContext) line: 750
SpringApplication.refreshContext(ConfigurableApplicationContext) line: 386
SpringApplication.run(String...) line: 327
SpringApplication.run(Class<?>[], String[]) line: 1245
SpringApplication.run(Class<?>, String...) line: 1233
Application.main(String[]) line: 56
如果对象是Advisor所要作用对象,则调用createProxy()生成proxy对象封闭目标对象,增强目标对象。如下面stack
Thread [main] (Suspended (breakpoint at line 441 in AbstractAutoProxyCreator))
owns: ConcurrentHashMap<K,V> (id=2343)
owns: Object (id=2107)
AnnotationAwareAspectJAutoProxyCreator(AbstractAutoProxyCreator).createProxy(Class<?>, String, Object[], TargetSource) line: 441
AnnotationAwareAspectJAutoProxyCreator(AbstractAutoProxyCreator).wrapIfNecessary(Object, String, Object) line: 349
AnnotationAwareAspectJAutoProxyCreator(AbstractAutoProxyCreator).postProcessAfterInitialization(Object, String) line: 298
DefaultListableBeanFactory(AbstractAutowireCapableBeanFactory).applyBeanPostProcessorsAfterInitialization(Object, String) line: 435
DefaultListableBeanFactory(AbstractAutowireCapableBeanFactory).initializeBean(String, Object, RootBeanDefinition) line: 1721
DefaultListableBeanFactory(AbstractAutowireCapableBeanFactory).doCreateBean(String, RootBeanDefinition, Object[]) line: 581
DefaultListableBeanFactory(AbstractAutowireCapableBeanFactory).createBean(String, RootBeanDefinition, Object[]) line: 498
DefaultListableBeanFactory(AbstractBeanFactory).lambda$doGetBean$0(String, RootBeanDefinition, Object[]) line: 305
48361312.getObject() line: not available
DefaultListableBeanFactory(DefaultSingletonBeanRegistry).getSingleton(String, ObjectFactory<?>) line: 233
DefaultListableBeanFactory(AbstractBeanFactory).doGetBean(String, Class<T>, Object[], boolean) line: 303
DefaultListableBeanFactory(AbstractBeanFactory).getBean(String, Class<T>) line: 198
CommonAnnotationBeanPostProcessor.autowireResource(BeanFactory, CommonAnnotationBeanPostProcessor$LookupElement, String) line: 512
CommonAnnotationBeanPostProcessor.getResource(CommonAnnotationBeanPostProcessor$LookupElement, String) line: 483
CommonAnnotationBeanPostProcessor$ResourceElement.getResourceToInject(Object, String) line: 617
CommonAnnotationBeanPostProcessor$ResourceElement(InjectionMetadata$InjectedElement).inject(Object, String, PropertyValues) line: 172
InjectionMetadata.inject(Object, String, PropertyValues) line: 89
CommonAnnotationBeanPostProcessor.postProcessPropertyValues(PropertyValues, PropertyDescriptor[], Object, String) line: 317
DefaultListableBeanFactory(AbstractAutowireCapableBeanFactory).populateBean(String, RootBeanDefinition, BeanWrapper) line: 1353
DefaultListableBeanFactory(AbstractAutowireCapableBeanFactory).doCreateBean(String, RootBeanDefinition, Object[]) line: 579
DefaultListableBeanFactory(AbstractAutowireCapableBeanFactory).createBean(String, RootBeanDefinition, Object[]) line: 498
DefaultListableBeanFactory(AbstractBeanFactory).lambda$doGetBean$0(String, RootBeanDefinition, Object[]) line: 305
48361312.getObject() line: not available
DefaultListableBeanFactory(DefaultSingletonBeanRegistry).getSingleton(String, ObjectFactory<?>) line: 233
DefaultListableBeanFactory(AbstractBeanFactory).doGetBean(String, Class<T>, Object[], boolean) line: 303
DefaultListableBeanFactory(AbstractBeanFactory).getBean(String, Class<T>) line: 198
CommonAnnotationBeanPostProcessor.autowireResource(BeanFactory, CommonAnnotationBeanPostProcessor$LookupElement, String) line: 512
CommonAnnotationBeanPostProcessor.getResource(CommonAnnotationBeanPostProcessor$LookupElement, String) line: 483
CommonAnnotationBeanPostProcessor$ResourceElement.getResourceToInject(Object, String) line: 617
CommonAnnotationBeanPostProcessor$ResourceElement(InjectionMetadata$InjectedElement).inject(Object, String, PropertyValues) line: 172
InjectionMetadata.inject(Object, String, PropertyValues) line: 89
CommonAnnotationBeanPostProcessor.postProcessPropertyValues(PropertyValues, PropertyDescriptor[], Object, String) line: 317
DefaultListableBeanFactory(AbstractAutowireCapableBeanFactory).populateBean(String, RootBeanDefinition, BeanWrapper) line: 1353
DefaultListableBeanFactory(AbstractAutowireCapableBeanFactory).doCreateBean(String, RootBeanDefinition, Object[]) line: 579
DefaultListableBeanFactory(AbstractAutowireCapableBeanFactory).createBean(String, RootBeanDefinition, Object[]) line: 498
DefaultListableBeanFactory(AbstractBeanFactory).lambda$doGetBean$0(String, RootBeanDefinition, Object[]) line: 305
48361312.getObject() line: not available
DefaultListableBeanFactory(DefaultSingletonBeanRegistry).getSingleton(String, ObjectFactory<?>) line: 233
DefaultListableBeanFactory(AbstractBeanFactory).doGetBean(String, Class<T>, Object[], boolean) line: 303
DefaultListableBeanFactory(AbstractBeanFactory).getBean(String) line: 193
DefaultListableBeanFactory.preInstantiateSingletons() line: 747
AnnotationConfigApplicationContext(AbstractApplicationContext).finishBeanFactoryInitialization(ConfigurableListableBeanFactory) line: 861
AnnotationConfigApplicationContext(AbstractApplicationContext).refresh() line: 542
SpringApplication.refresh(ApplicationContext) line: 750
SpringApplication.refreshContext(ConfigurableApplicationContext) line: 386
SpringApplication.run(String...) line: 327
SpringApplication.run(Class<?>[], String[]) line: 1245
SpringApplication.run(Class<?>, String...) line: 1233
Application.main(String[]) line: 56
AbstractAutoProxyCreator.createProxy()
DefaultAopProxyFactory.createAopProxy()
@Transactional标识增强对象是类所以创建proxy对象是ObjenesisCglibAopProxy