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Introduction to Spring AOP

Sumit Rawal answered on May 15, 2023 Popularity 1/10 Helpfulness 1/10

answer Introduction to Spring AOP

Introduction to Spring AOP

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In Spring AOP, we use several annotations to define aspects, joinpoints, advice, and pointcuts. Here are some examples of these annotations:

@Aspect — This annotation defines a class as an aspect, which is the modularization of a concern. The aspect contains advice and pointcuts.

@Joinpoint — A joinpoint is a point in the program’s execution where an aspect can be applied. In Spring AOP, joinpoints are method invocations.

@Advice — Advice is the action that an aspect takes at a particular joinpoint. There are several types of advice, such as “before”, “after”, “around”, etc.

@Pointcut — A pointcut is a set of joinpoints where an aspect should be applied. It defines a pattern that matches the methods that the aspect should intercept. Pointcuts can be defined using expressions or annotations.

@Aspect
@Component
public class LoggingAspect {

    @Before("execution(public * com.example.myapp.service.*.*(..))")
    public void logBefore(JoinPoint joinPoint) {
        System.out.println("Before " + joinPoint.getSignature().getName() + " method");
    }

    @After("execution(public * com.example.myapp.service.*.*(..))")
    public void logAfter(JoinPoint joinPoint) {
        System.out.println("After " + joinPoint.getSignature().getName() + " method");
    }

    @Around("execution(public * com.example.myapp.service.*.*(..))")
    public Object logAround(ProceedingJoinPoint joinPoint) throws Throwable {
        System.out.println("Before " + joinPoint.getSignature().getName() + " method");
        Object result = joinPoint.proceed();
        System.out.println("After " + joinPoint.getSignature().getName() + " method");
        return result;
    }

    @Pointcut("execution(public * com.example.myapp.service.*.*(..))")
    public void serviceMethods() {}
}

Popularity 1/10 Helpfulness 1/10 Language java

Source: Grepper

Tags: java spring-aop

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Contributed on May 15 2023

Sumit Rawal

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