简介

持有AOP Advice和决定Advice适用性的过滤器（比如Pointcut）的基础接口；
Spring AOP基于符合AOP拦截API的MethodInterceptor支持通知，Advisor接口允许支持不同类型的通知，比如：前置通知、后置通知这些不需要通过拦截器实现的通知；

源码

public interface Advisor {// 空通知Advice EMPTY_ADVICE = new Advice() {};// 获取通知，可以是拦截器、前置通知、抛出异常通知等Advice getAdvice();// 是否和每个被通知的实例相关// 当前框架还未用到该方法，可以通过单例/多例，或者恰当的代理创建来确保Advisor的生命周期正确boolean isPerInstance();
}

实现子类

IntroductionAdvisor

简介

支持AOP 引介功能的Advisor的基础接口；

核心代码

public interface IntroductionAdvisor extends Advisor, IntroductionInfo {// 获取决定引介适用性的类过滤器ClassFilter getClassFilter();// 校验被通知的接口是否可以应用该IntroductionAdvisorvoid validateInterfaces() throws IllegalArgumentException;
}

DefaultIntroductionAdvisor

简介

IntroductionAdvisor的简单实现，默认地应用引介到任意类型；

核心代码

public class DefaultIntroductionAdvisor implements IntroductionAdvisor, ClassFilter, Ordered, Serializable {private final Advice advice;private final Set<Class<?>> interfaces = new LinkedHashSet<>();public DefaultIntroductionAdvisor(Advice advice, @Nullable IntroductionInfo introductionInfo) {// 校验AdviceAssert.notNull(advice, "Advice must not be null");this.advice = advice;if (introductionInfo != null) {Class<?>[] introducedInterfaces = introductionInfo.getInterfaces();if (introducedInterfaces.length == 0) {throw new IllegalArgumentException("IntroductionInfo defines no interfaces to introduce: " + introductionInfo);}// 应用引介接口信息for (Class<?> ifc : introducedInterfaces) {addInterface(ifc);}}}public DefaultIntroductionAdvisor(DynamicIntroductionAdvice advice, Class<?> ifc) {// 校验AdviceAssert.notNull(advice, "Advice must not be null");this.advice = advice;addInterface(ifc);}public void addInterface(Class<?> ifc) {Assert.notNull(ifc, "Interface must not be null");if (!ifc.isInterface()) {throw new IllegalArgumentException("Specified class [" + ifc.getName() + "] must be an interface");}this.interfaces.add(ifc);}@Overridepublic Class<?>[] getInterfaces() {return ClassUtils.toClassArray(this.interfaces);}@Overridepublic void validateInterfaces() throws IllegalArgumentException {for (Class<?> ifc : this.interfaces) {// 校验当前Advice是否支持所有的interfacesif (this.advice instanceof DynamicIntroductionAdvice &&!((DynamicIntroductionAdvice) this.advice).implementsInterface(ifc)) {throw new IllegalArgumentException("DynamicIntroductionAdvice [" + this.advice + "] " +"does not implement interface [" + ifc.getName() + "] specified for introduction");}}}@Overridepublic Advice getAdvice() {return this.advice;}@Overridepublic boolean isPerInstance() {return true;}@Overridepublic ClassFilter getClassFilter() {// 返回自身return this;}@Overridepublic boolean matches(Class<?> clazz) {// 匹配任意类型return true;}
}

PointcutAdvisor

简介

由Pointcut驱动的Advisor的基础接口；
含盖了除引介Advisor外几乎所有的Advisor；

核心代码

public interface PointcutAdvisor extends Advisor {// 获取PointcutPointcut getPointcut();
}

StaticMethodMatcherPointcutAdvisor

简介

同时作为StaticMethodMatcherPointcut的Advisor的基础抽象类；

核心代码

public abstract class StaticMethodMatcherPointcutAdvisor extends StaticMethodMatcherPointcutimplements PointcutAdvisor, Ordered, Serializable {// 默认空通知private Advice advice = EMPTY_ADVICE;public StaticMethodMatcherPointcutAdvisor(Advice advice) {// 校验AdviceAssert.notNull(advice, "Advice must not be null");this.advice = advice;}@Overridepublic Advice getAdvice() {return this.advice;}@Overridepublic boolean isPerInstance() {return true;}@Overridepublic Pointcut getPointcut() {// 返回自身return this;}
}

AspectJPointcutAdvisor

简介

适配AbstractAspectJAdvice为PointcutAdvisor接口；

核心代码

public class AspectJPointcutAdvisor implements PointcutAdvisor, Ordered {private final AbstractAspectJAdvice advice;private final Pointcut pointcut;public AspectJPointcutAdvisor(AbstractAspectJAdvice advice) {// 校验AdviceAssert.notNull(advice, "Advice must not be null");this.advice = advice;this.pointcut = advice.buildSafePointcut();}@Overridepublic boolean isPerInstance() {return true;}@Overridepublic Advice getAdvice() {return this.advice;}@Overridepublic Pointcut getPointcut() {return this.pointcut;}
}

AsyncAnnotationAdvisor

简介

Spring Async功能的实现，支持通过@Async注解和javax.ejb.Asynchronous注解来激活异步方法执行的Advisor；

核心代码

public class AsyncAnnotationAdvisor extends AbstractPointcutAdvisor implements BeanFactoryAware {private Advice advice;private Pointcut pointcut;public AsyncAnnotationAdvisor(@Nullable Supplier<Executor> executor, @Nullable Supplier<AsyncUncaughtExceptionHandler> exceptionHandler) {// 默认支持Async和javax.ejb.Asynchronous，故size为2Set<Class<? extends Annotation>> asyncAnnotationTypes = new LinkedHashSet<>(2);asyncAnnotationTypes.add(Async.class);try {asyncAnnotationTypes.add((Class<? extends Annotation>)ClassUtils.forName("javax.ejb.Asynchronous", AsyncAnnotationAdvisor.class.getClassLoader()));}catch (ClassNotFoundException ex) {// If EJB 3.1 API not present, simply ignore.}// 根据异步执行器和异常处理器生成Advicethis.advice = buildAdvice(executor, exceptionHandler);// 生成Pointcutthis.pointcut = buildPointcut(asyncAnnotationTypes);}@Overridepublic Advice getAdvice() {return this.advice;}@Overridepublic Pointcut getPointcut() {return this.pointcut;}protected Advice buildAdvice(@Nullable Supplier<Executor> executor, @Nullable Supplier<AsyncUncaughtExceptionHandler> exceptionHandler) {// 使用AnnotationAsyncExecutionInterceptorAnnotationAsyncExecutionInterceptor interceptor = new AnnotationAsyncExecutionInterceptor(null);interceptor.configure(executor, exceptionHandler);return interceptor;}protected Pointcut buildPointcut(Set<Class<? extends Annotation>> asyncAnnotationTypes) {ComposablePointcut result = null;// 遍历注解类型集合，得到一个ComposablePointcutfor (Class<? extends Annotation> asyncAnnotationType : asyncAnnotationTypes) {// 匹配类，忽略方法（MethodMatcher.TRUE）Pointcut cpc = new AnnotationMatchingPointcut(asyncAnnotationType, true);// 匹配方法，忽略类（ClassFilter.TRUE）Pointcut mpc = new AnnotationMatchingPointcut(null, asyncAnnotationType, true);if (result == null) {result = new ComposablePointcut(cpc);}else {result.union(cpc);}result = result.union(mpc);}// 若不存在注解类型，则认为全匹配return (result != null ? result : Pointcut.TRUE);}
}

BeanFactoryCacheOperationSourceAdvisor

简介

Spring Cache功能的实现，基于CacheOperationSource实现的Advisor，内部持有Advice实例；

核心代码

public class BeanFactoryCacheOperationSourceAdvisor extends AbstractBeanFactoryPointcutAdvisor {// 判断当前方法是否有缓存注解，被CacheOperationSourcePointcut用来实现切入点逻辑@Nullableprivate CacheOperationSource cacheOperationSource;// 使用基于CacheOperationSource的CacheOperationSourcePointcut作为pointcutprivate final CacheOperationSourcePointcut pointcut = new CacheOperationSourcePointcut() {@Override@Nullableprotected CacheOperationSource getCacheOperationSource() {return cacheOperationSource;}};@Overridepublic Pointcut getPointcut() {return this.pointcut;}
}

BeanFactoryTransactionAttributeSourceAdvisor

简介

Spring 注解驱动的事务管理功能的实现，基于TransactionAttributeSource实现的Advisor，内部持有Advice实例；

核心方法

public class BeanFactoryTransactionAttributeSourceAdvisor extends AbstractBeanFactoryPointcutAdvisor {// 判断当前方法是否有@Transactional注解，被TransactionAttributeSourcePointcut用来实现切入点逻辑@Nullableprivate TransactionAttributeSource transactionAttributeSource;// 使用基于TransactionAttributeSource的TransactionAttributeSourcePointcut作为pointcutprivate final TransactionAttributeSourcePointcut pointcut = new TransactionAttributeSourcePointcut() {@Override@Nullableprotected TransactionAttributeSource getTransactionAttributeSource() {return transactionAttributeSource;}};@Overridepublic Pointcut getPointcut() {return this.pointcut;}
}

TransactionAttributeSourceAdvisor

简介

Spring 注解驱动的事务管理功能的实现，基于TransactionAttributeSource实现的Advisor，内部持有TransactionInterceptor实例；

核心代码

public class TransactionAttributeSourceAdvisor extends AbstractPointcutAdvisor {// 被TransactionAttributeSourcePointcut用来实现切入点逻辑@Nullableprivate TransactionInterceptor transactionInterceptor;// 使用基于TransactionAttributeSource的TransactionAttributeSourcePointcut作为pointcutprivate final TransactionAttributeSourcePointcut pointcut = new TransactionAttributeSourcePointcut() {@Override@Nullableprotected TransactionAttributeSource getTransactionAttributeSource() {return (transactionInterceptor != null ? transactionInterceptor.getTransactionAttributeSource() : null);}};@Overridepublic Advice getAdvice() {Assert.state(this.transactionInterceptor != null, "No TransactionInterceptor set");return this.transactionInterceptor;}@Overridepublic Pointcut getPointcut() {return this.pointcut;}
}

DefaultPointcutAdvisor

简介

几乎最通用的PointcutAdvisor的实现，可以使用任意类型Pointcut和除引介外任意类型Advice；

核心代码

public class DefaultPointcutAdvisor extends AbstractGenericPointcutAdvisor implements Serializable {private Pointcut pointcut = Pointcut.TRUE;public DefaultPointcutAdvisor(Pointcut pointcut, Advice advice) {this.pointcut = pointcut;setAdvice(advice);}public void setPointcut(@Nullable Pointcut pointcut) {this.pointcut = (pointcut != null ? pointcut : Pointcut.TRUE);}@Overridepublic Pointcut getPointcut() {return this.pointcut;}
}

NameMatchMethodPointcutAdvisor

简介

使用NameMatchMethodPointcut的Advisor；

核心代码

public class NameMatchMethodPointcutAdvisor extends AbstractGenericPointcutAdvisor {private final NameMatchMethodPointcut pointcut = new NameMatchMethodPointcut();public NameMatchMethodPointcutAdvisor(Advice advice) {setAdvice(advice);}public void setMappedName(String mappedName) {this.pointcut.setMappedName(mappedName);}public void setMappedNames(String... mappedNames) {this.pointcut.setMappedNames(mappedNames);}public NameMatchMethodPointcut addMethodName(String name) {return this.pointcut.addMethodName(name);}@Overridepublic Pointcut getPointcut() {return this.pointcut;}
}

RegexpMethodPointcutAdvisor

简介

使用AbstractRegexpMethodPointcut的Advisor；

核心代码

public class RegexpMethodPointcutAdvisor extends AbstractGenericPointcutAdvisor {@Nullableprivate String[] patterns;@Nullableprivate AbstractRegexpMethodPointcut pointcut;public RegexpMethodPointcutAdvisor(String pattern, Advice advice) {setPattern(pattern);setAdvice(advice);}public RegexpMethodPointcutAdvisor(String[] patterns, Advice advice) {setPatterns(patterns);setAdvice(advice);}@Overridepublic Pointcut getPointcut() {synchronized (this.pointcutMonitor) {if (this.pointcut == null) {this.pointcut = createPointcut();if (this.patterns != null) {//设置正则表达式this.pointcut.setPatterns(this.patterns);}}return this.pointcut;}}protected AbstractRegexpMethodPointcut createPointcut() {// 使用JdkRegexpMethodPointcutreturn new JdkRegexpMethodPointcut();}
}

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Spring AOP基础组件 Advisor

相关阅读

简介

源码

实现子类

IntroductionAdvisor

简介

核心代码

DefaultIntroductionAdvisor

简介

核心代码

PointcutAdvisor

简介

核心代码

StaticMethodMatcherPointcutAdvisor

简介

核心代码

AspectJPointcutAdvisor

简介

核心代码

AsyncAnnotationAdvisor

简介

核心代码

BeanFactoryCacheOperationSourceAdvisor

简介

核心代码

BeanFactoryTransactionAttributeSourceAdvisor

简介

核心方法

TransactionAttributeSourceAdvisor

简介

核心代码

DefaultPointcutAdvisor

简介

核心代码

NameMatchMethodPointcutAdvisor

简介

核心代码

RegexpMethodPointcutAdvisor

简介

核心代码

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