Dynamic Pointcut Example : Spring Aspect « Spring « Java






  1. Java
  2. Spring
  3. Spring Aspect

Dynamic Pointcut Example 

/* Pro Spring By Rob Harrop Jan Machacek ISBN: 1-59059-461-4 Publisher: Apress *//////////////////////////////////////////////////////////////////////////////////////// publicclass SampleBean { publicvoid foo(int x) { System.out.println("Invoked foo() with: " +x); } publicvoid bar() { System.out.println("Invoked bar()"); } } /////////////////////////////////////////////////////////////////////////////////////// import org.aopalliance.intercept.MethodInterceptor; import org.aopalliance.intercept.MethodInvocation; publicclass SimpleAdvice implements MethodInterceptor { public Object invoke(MethodInvocation invocation) throws Throwable { System.out.println(">> Invoking " + invocation.getMethod().getName()); Object retVal = invocation.proceed(); System.out.println(">> Done"); return retVal; } } /////////////////////////////////////////////////////////////////////////////////////// import java.lang.reflect.Method; import org.springframework.aop.ClassFilter; import org.springframework.aop.support.DynamicMethodMatcherPointcut; publicclass SimpleDynamicPointcut extends DynamicMethodMatcherPointcut { publicboolean matches(Method method, Class cls) { System.out.println("Static check for " + method.getName()); return ("foo".equals(method.getName())); } publicboolean matches(Method method, Class cls, Object[] args) { System.out.println("Dynamic check for " + method.getName()); int x = ((Integer) args[0]).intValue(); return (x != 100); } public ClassFilter getClassFilter() { returnnew ClassFilter() { publicboolean matches(Class cls) { return (cls == SampleBean.class); } }; } } /////////////////////////////////////////////////////////////////////////////////////// import org.springframework.aop.Advisor; import org.springframework.aop.framework.ProxyFactory; import org.springframework.aop.support.DefaultPointcutAdvisor; publicclass DynamicPointcutExample { publicstaticvoid main(String[] args) { SampleBean target = new SampleBean(); // create advisor  Advisor advisor = new DefaultPointcutAdvisor( new SimpleDynamicPointcut(), new SimpleAdvice()); // create proxy  ProxyFactory pf = new ProxyFactory(); pf.setTarget(target); pf.addAdvisor(advisor); SampleBean proxy = (SampleBean)pf.getProxy(); proxy.foo(1); proxy.foo(10); proxy.foo(100); proxy.bar(); proxy.bar(); proxy.bar(); } }








DynamicPointcutExample.zip( 1,481 k)

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