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deluf
Asked: 2020-05-03 06:30:02 +0800 CST 2020-05-03 06:30:02 +0800 CST

What does @aspect mean in spring

  • 772

for example reviewing this code

@Aspect
class CommandExecuteInterceptor implements ApplicationContextAware {

    private ApplicationContext context;

what does @aspect mean, why use it, when to use it?

spring-boot

1 Answers

  1. Best Answer

    This has to do with the paradigm of Aspect Oriented Programming (AOP), I will tell you briefly:

    Aspect Oriented Programming (AOP) is a programming paradigm that tries to formalize and concisely represent the elements that are transversal to the entire system. How is this? a common example is controlling the execution permissions of certain methods in a class.

    public class ObjetoDeNegocio {
   public void metodoDeNegocio1() throws SinPermisoException {
        validarPermisos();
        //resto del código
        ...
   }

   public void metodoDeNegocio2() throws SinPermisoException {
        validaPermisos();
        //resto del código
        ...
   }     
}

    In AOP, the elements that are transversal to the structure of the system and can be modularized thanks to the constructions provided by the paradigm are called aspects.

    An aspect is a set of advices. Following the AspectJ syntax, aspects are represented as Java classes, marked with the @Aspect annotation. In Spring, moreover, an aspect must be a bean, so it has to be annotated as such.

    import org.aspectj.lang.annotation.Aspect;
import org.springframework.stereotype.Component;



@Component
@Aspect
public class EjemploDeAspecto {

  //aquí vendrían los advices...
}

    More info: Spring AOP

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