Can someone pinpoint what am I doing wrong? How can I make my Aspect run?
I have written this code following some examples:
@Aspect
public class MethodLogger {
private Logger log = Logger.getLogger(getClass().getName());
@Pointcut("execution(* setHeight(..))")
public void log(JoinPoint point) {
log.info(point.getSignature().getName() + " called...");
}
}
My simple test class:
public class ChairImpl implements Chair {
int height;
public ChairImpl(){}
public int getHeight() {
return height;
}
public void setHeight(int height) {
this.height = height;
}
}
My Spring xml config:
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:p="http://www.springframework.org/schema/p"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:aop="http://www.springframework.org/schema/aop"
xsi:schemaLocation="
http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd
http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.0.xsd"
default-destroy-method="destroy"
default-init-method="afterPropertiesSet"
default-autowire="byName"
>
<aop:aspectj-autoproxy>
<aop:include name="MethodLogger"/>
</aop:aspectj-autoproxy>
<bean id="logger1" class="lab.MethodLogger"/>
<bean id="chair1"
class="lab.test.ChairImpl"
>
<property name="height" value="10"/>
</bean>
</beans>
And my main method:
public class Main {
public static void main(String[] args){
ApplicationContext context = new ClassPathXmlApplicationContext("spec.xml");
((AbstractApplicationContext) context).close();
}
}
So before running my project, Eclipse gives me this error(it marks red void word for log method):
Pointcuts without an if() expression should have an empty method body
When I run, my program runs without errors, because it looks like log method never ran. So how could I fix it so it would run and output log? I tried simply to print test text from that method, but it never does, so it means it never runs. What am I missing here?
In documentation it only writes vague examples like:
@Pointcut("execution(* transfer(..))")// the pointcut expression
private void anyOldTransfer() {}// the pointcut signature
But I find it hard to understand how to actually use it to see results.