в 17:44, 31 мая 2010

2010-05-31T17:44:26Z

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2010-05-31T15:22:43Z

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== Add Advice To ProxyFactory ==

File: Main.java



<source lang="java">
import org.aopalliance.intercept.MethodInterceptor;
import org.aopalliance.intercept.MethodInvocation;
import org.springframework.aop.framework.ProxyFactory;
public class Main {
public static void main(String[] args) throws Exception {
MessageWriter target = new MessageWriter();
ProxyFactory pf = new ProxyFactory();
pf.addAdvice(new MessageDecorator());
pf.setTarget(target);
MessageWriter proxy = (MessageWriter) pf.getProxy();
target.writeMessage();
System.out.println("");
proxy.writeMessage();
}
}
class MessageWriter {
public void writeMessage() {
System.out.print("A");
}
}
class MessageDecorator implements MethodInterceptor {
public Object invoke(MethodInvocation invocation) throws Throwable {
System.out.print("B ");
Object retVal = invocation.proceed();
System.out.println("C");
return retVal;
}
}</source>



== Invoke Method Through Proxy ==

File: Main.java



<source lang="java">
import java.lang.reflect.Method;
import org.springframework.aop.Advisor;
import org.springframework.aop.MethodBeforeAdvice;
import org.springframework.aop.Pointcut;
import org.springframework.aop.framework.ProxyFactory;
import org.springframework.aop.support.ControlFlowPointcut;
import org.springframework.aop.support.DefaultPointcutAdvisor;
public class Main {
public static void main(String[] args) {
TestBean target = new TestBean();
Pointcut pc = new ControlFlowPointcut(Main.class, "test");
Advisor advisor = new DefaultPointcutAdvisor(pc, new SimpleBeforeAdvice());
ProxyFactory pf = new ProxyFactory();
pf.setTarget(target);
pf.addAdvisor(advisor);
TestBean proxy = (TestBean) pf.getProxy();
proxy.foo();
test(proxy);
}
static void test(TestBean bean) {
bean.foo();
}
}
class TestBean {
public void foo() {
System.out.println("foo");
}
}
class SimpleBeforeAdvice implements MethodBeforeAdvice {
public void before(Method method, Object[] args, Object target) throws Throwable {
System.out.println("Before method " + method);
}
}</source>



== Proxy Factory Add Advisor ==

File: Main.java



<source lang="java">
import java.lang.reflect.Method;
import org.aopalliance.aop.Advice;
import org.aopalliance.intercept.MethodInterceptor;
import org.aopalliance.intercept.MethodInvocation;
import org.springframework.aop.Advisor;
import org.springframework.aop.ClassFilter;
import org.springframework.aop.Pointcut;
import org.springframework.aop.framework.ProxyFactory;
import org.springframework.aop.support.DefaultPointcutAdvisor;
import org.springframework.aop.support.StaticMethodMatcherPointcut;
public class Main {
public static void main(String[] args) {
BeanOne one = new BeanOne();
BeanTwo two = new BeanTwo();
BeanOne proxyOne;
BeanTwo proxyTwo;
Pointcut pc = new SimpleStaticPointcut();
Advice advice = new SimpleAdvice();
Advisor advisor = new DefaultPointcutAdvisor(pc, advice);
ProxyFactory pf = new ProxyFactory();
pf.addAdvisor(advisor);
pf.setTarget(one);
proxyOne = (BeanOne) pf.getProxy();
pf = new ProxyFactory();
pf.addAdvisor(advisor);
pf.setTarget(two);
proxyTwo = (BeanTwo) pf.getProxy();
proxyOne.foo();
proxyTwo.foo();
proxyOne.bar();
proxyTwo.bar();
}
}
class BeanTwo {
public void foo() {
System.out.println("BeanTwo.foo");
}
public void bar() {
System.out.println("BeanTwo.bar");
}
}
class BeanOne {
public void foo() {
System.out.println("BeanOne.foo");
}
public void bar() {
System.out.println("BeanOne.bar");
}
}
class SimpleAdvice implements MethodInterceptor {
public Object invoke(MethodInvocation invocation) throws Throwable {
System.out.println("SimpleAdvice.Invoking " + invocation.getMethod().getName());
Object retVal = invocation.proceed();
System.out.println("SimpleAdvice.Done");
return retVal;
}
}
class SimpleStaticPointcut extends StaticMethodMatcherPointcut {
public boolean matches(Method method, Class cls) {
return ("foo".equals(method.getName()));
}
public ClassFilter getClassFilter() {
return new ClassFilter() {
public boolean matches(Class cls) {
return (cls == BeanOne.class);
}
};
}
}</source>

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