Specifying pointcut in Spring AOP

Question

I am familiar with Spring AOP, although not having much hands on experience on that.

My question is, if I want to have some AOP functionality for some methods of a class, not all, then can it be possible with single pointcut. Say, I have four methods save1,save2,get1 and get2 in my class and I want to apply AOP on save1 and save2 only, then in that case how can I create a single pointcut for that? How will my pointcut expression looks like? OR Is it even possible?

Answer 1

There are many ways to do it(with wildcard expression, with aspectJ annotation, ..) i will give an example with aspectJ

class MyClass{
          @MyPoint 
          public void save1(){
          }  

          @MyPoint
          public void save2(){
          }  

          public void save3(){
          }  

          public void save4(){
          }  

}

@Retention(RetentionPolicy.RUNTIME)
@Target(ElementType.METHOD)
public @interface MyPoint {
}

@Aspect
@Component
public class MyAspect {
    @Before("@annotation(com.xyz.MyPoint)")
    public void before(JoinPoint joinPoint) throws Throwable {
        //do here what u want
    }

}

So you are all set, as long as you marked @Mypoint annotation, spring will call before aspect for this method, make sure spring is managing this method and object, not you. include aspectJ in your classpath

Answer 2

You need to specify a pointcut expression to select the methods with to apply your advice.

See 7.2.3 Declaring a pointcut in the Spring Documentation and use the execution joinpoint designator to select the methods.

Answer 3

Having a pointcut expression like so should do the trick

**execution(* save*(..))**

See here for more information

Answer 4

您可以将or和and与切入点表达式一起使用：

execution(* my.Class.myMethod(..)) or execution(* my.Class.myOtherMethod(..))