标签：spring ice ntc 方法 this 包含 err throwable ODB
简要记录下ProxyFactoryBean的分析。
proxyFactoryBean 里面，对于Advice类，如MethodBeforeAdvice，AfterRetruningAdvice,ThrowsAdvice 都会转化为MethodInterceptor再起作用
interceptorNames 属性里面的参数，如果是Advisor（包含一个起作用的Advice，和一个限定范围的Pointcut），直接返回，存入AdvicedSupport里面去，
如果是MethodInterceptor或者是以上三类Advice的子类，转化为DefaultPointcutAdvice 后，存入AdvicedSupport的数组里面。
public MethodInterceptor[] getInterceptors(Advisor advisor) throws UnknownAdviceTypeException { List<MethodInterceptor> interceptors = new ArrayList<MethodInterceptor>(3); Advice advice = advisor.getAdvice(); if (advice instanceof MethodInterceptor) { interceptors.add((MethodInterceptor) advice); } for (AdvisorAdapter adapter : this.adapters) { if (adapter.supportsAdvice(advice)) { interceptors.add(adapter.getInterceptor(advisor)); } } if (interceptors.isEmpty()) { throw new UnknownAdviceTypeException(advisor.getAdvice()); } return interceptors.toArray(new MethodInterceptor[interceptors.size()]); }
上面代码就是对于特定的Advisor获取methodInterceptor数组，对于之AdvisorAdapter，这个类的作用就是将Advice转化为MethodInterptor。以下面代码分析。
class MethodBeforeAdviceAdapter implements AdvisorAdapter, Serializable { MethodBeforeAdviceAdapter() { } public boolean supportsAdvice(Advice advice) { return advice instanceof MethodBeforeAdvice; } public MethodInterceptor getInterceptor(Advisor advisor) { MethodBeforeAdvice advice = (MethodBeforeAdvice)advisor.getAdvice(); return new MethodBeforeAdviceInterceptor(advice); } }
对于getInterceptor方法，参数advisor实际上就是之前转化的pointcutAdvice，然后看MethodBeforeAdviceInterceptor，
public class MethodBeforeAdviceInterceptor implements MethodInterceptor, Serializable { private MethodBeforeAdvice advice; /** * Create a new MethodBeforeAdviceInterceptor for the given advice. * @param advice the MethodBeforeAdvice to wrap */ public MethodBeforeAdviceInterceptor(MethodBeforeAdvice advice) { Assert.notNull(advice, "Advice must not be null"); this.advice = advice; } public Object invoke(MethodInvocation mi) throws Throwable { this.advice.before(mi.getMethod(), mi.getArguments(), mi.getThis() ); return mi.proceed(); } }
实际上就是插入了advice.before的代码，然后继续调mi.proceed（），驱动methodInteceptor链往下调用。
标签：spring ice ntc 方法 this 包含 err throwable ODB
原文地址：https://www.cnblogs.com/newlx/p/9098000.html
