/**
* Created by IntelliJ IDEA.
* User: Gayan-Laptop
* Date: Dec 22, 2009
* Time: 1:49:12 AM
* To change this template use File | Settings | File Templates.
*/
public interface Adder {
public int add(int a, int b);
}
=====================================================
package aop;
/**
* Created by IntelliJ IDEA.
* User: Gayan-Laptop
* Date: Dec 22, 2009
* Time: 1:51:13 AM
* To change this template use File | Settings | File Templates.
*/
public class AdderImpl implements Adder {
public int add(int a, int b) {
return a + b;
}
}
===============================================================
package aop;/**
* Created by IntelliJ IDEA.
* User: Gayan-Laptop
* Date: Dec 22, 2009
* Time: 1:53:20 AM
* To change this template use File | Settings | File Templates.
*/
import org.springframework.aop.AfterReturningAdvice;
import java.lang.reflect.Method;
public class LogAfterReturningAdvice implements AfterReturningAdvice {
public void afterReturning(Object returnValue, Method method, Object[] args,
Object target) throws Throwable {
System.out.println("After Normal Return from Method (here you can remove attribute in session )");
}
}
=============================================================
package aop;/**
* Created by IntelliJ IDEA.
* User: Gayan-Laptop
* Date: Dec 22, 2009
* Time: 1:53:53 AM
* To change this template use File | Settings | File Templates.
*/
import org.springframework.aop.ThrowsAdvice;
import java.lang.reflect.Method;
public class LogAfterThrowsAdvice implements ThrowsAdvice {
public void afterThrowing(Method method, Object[] args, Object target,
Exception exception) {
System.out.println("Exception is thrown on method " + method.getName());
}
}
======================================================
package aop;/**
* Created by IntelliJ IDEA.
* User: Gayan-Laptop
* Date: Dec 22, 2009
* Time: 1:54:23 AM
* To change this template use File | Settings | File Templates.
*/
import org.aopalliance.intercept.MethodInterceptor;
import org.aopalliance.intercept.MethodInvocation;
public class LogAroundAdvice implements MethodInterceptor {
public Object invoke(MethodInvocation methodInvocation) throws Throwable {
System.out.println("LogAroundAdvice invoke method (here you can check method Arguments validation) ");
Object arguments[] = methodInvocation.getArguments();
int number1 = ((Integer) arguments[0]).intValue();
int number2 = ((Integer) arguments[1]).intValue();
if (number1 == 0 && number2 == 0) {
throw new Exception("Dont know how to add 0 and 0!!!");
}
if(number2==0){
throw new Exception("Dont know how to divide by 0 !!!");
}
return methodInvocation.proceed();
}
}
==========================================================
package aop;/**
* Created by IntelliJ IDEA.
* User: Gayan-Laptop
* Date: Dec 22, 2009
* Time: 1:52:11 AM
* To change this template use File | Settings | File Templates.
*/
import org.springframework.aop.MethodBeforeAdvice;
import java.lang.reflect.Method;
public class LogBeforeCallAdvice implements MethodBeforeAdvice {
public void before(Method method, Object[] args, Object target) {
System.out.println("Before Calling the Method (here you can check user sessions) ");
}
}
=======================================================
package aop;
/**
* Created by IntelliJ IDEA.
* User: Gayan-Laptop
* Date: Dec 22, 2009
* Time: 2:18:15 AM
* To change this template use File | Settings | File Templates.
*/
import org.springframework.beans.factory.BeanFactory;
import org.springframework.beans.factory.xml.XmlBeanFactory;
import org.springframework.core.io.FileSystemResource;
import org.springframework.core.io.Resource;
public class AdderTest {
public static void main(String args[]) {
try {
Resource resource = new FileSystemResource("./aop-test.xml");
BeanFactory factory = new XmlBeanFactory(resource);
try{
Adder adder = (Adder) factory.getBean("adder");
System.out.println("------------- TEST CASE 1 ---------------");
int result = adder.add(10, 10);
System.out.println("Result = " + result);
System.out.println("------------- TEST CASE 2 ---------------");
result = adder.add(100, 10);
System.out.println("Result = " + result);
System.out.println("------------- TEST CASE 3 ---------------");
result = adder.add(101, 110);
System.out.println("Result = " + result);
System.out.println("------------- TEST CASE 4 ---------------");
result = adder.add(0, 0);
System.out.println("Result = " + result);
}catch(Exception e){
e.printStackTrace();
}
try{
Divider divider = (Divider) factory.getBean("divider");
System.out.println("------------- TEST CASE 5 ---------------");
int result2 = divider.divide(6,3);
System.out.println("Result = " + result2);
System.out.println("------------- TEST CASE 6 ---------------");
result2 = divider.divide(12,3);
System.out.println("Result = " + result2);
System.out.println("------------- TEST CASE 7 ---------------");
result2 = divider.divide(16,3);
System.out.println("Result = " + result2);
System.out.println("------------- TEST CASE 9 ---------------");
result2 = divider.divide(6,0);
System.out.println("Result = " + result2);
}catch(Exception e){
e.printStackTrace();
}
} catch (Exception e) {
e.printStackTrace();
}
}
}
================================================================
aop-test.xml file
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-2.0.xsd">
<!-- Advices -->
<bean id="beforeCall" class="aop.LogBeforeCallAdvice"/>
<bean id="afterCall" class="aop.LogAfterReturningAdvice"/>
<bean id="throwCall" class="aop.LogAfterThrowsAdvice"/>
<bean id="aroundCall" class="aop.LogAroundAdvice"/>
<!-- Implementation Class -->
<bean id="adderImpl" class="aop.AdderImpl"/>
<bean id="dividerImpl" class="aop.DividerImpl"/>
<!-- Proxy Implementation Class -->
<bean id="adder" class="org.springframework.aop.framework.ProxyFactoryBean">
<property name="proxyInterfaces">
<value>aop.Adder</value>
</property>
<property name="interceptorNames">
<list>
<value>beforeCall</value>
<value>afterCall</value>
<value>throwCall</value>
<value>aroundCall</value>
</list>
</property>
<property name="target">
<ref bean="adderImpl"/>
</property>
</bean>
<bean id="divider" class="org.springframework.aop.framework.ProxyFactoryBean">
<property name="proxyInterfaces">
<value>aop.Divider</value>
</property>
<property name="interceptorNames">
<list>
<value>beforeCall</value>
<value>afterCall</value>
<value>throwCall</value>
<value>aroundCall</value>
</list>
</property>
<property name="target">
<ref bean="dividerImpl"/>
</property>
</bean>
</beans>
