Modifying the previous example!

Interesting!

beans.xml
<?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:aop="http://www.springframework.org/schema/aop"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
                           http://www.springframework.org/schema/beans/spring-beans.xsd
                           http://www.springframework.org/schema/aop
                           http://www.springframework.org/schema/aop/spring-aop-4.0.xsd">
 
    <bean id="bar" class="biz.tugay.spashe.BarImpl"/>
 
    <aop:config>
        <aop:advisor
                pointcut="execution(void biz.tugay.spashe.Foo.foo())"
                advice-ref="bar"/>
    </aop:config>
 
    <bean id="foo" class="biz.tugay.spashe.FooImpl"/>
</beans>

BarImpl.java
package biz.tugay.spashe;
 
import org.springframework.aop.MethodBeforeAdvice;
 
import java.lang.reflect.Method;
 
/**
 * User: Koray Tugay (koray@tugay.biz)
 * Date: 26/10/2017
 */
 
public class BarImpl implements MethodBeforeAdvice {
 
    @Override
    public void before(Method method, Object[] objects, Object o) throws Throwable {
        System.out.println("BarImpl#bar");
    }
}
I do not know why
<aop:aspectj-autoproxy/>
is not required!