Spring 5 Design Patterns

Before Advice example

Let's see the use of @Before annotation:

    //Before transfer service 
    @Before("execution(* com.packt.patterninspring.chapter6.    bankapp.service.TransferService.transfer(..))")  
    public void validate(){ 
      System.out.println("bank validate your credentials before amount       transferring"); 
    } 
 
    //Before transfer service 
    @Before("execution(* com.packt.patterninspring.chapter6.    bankapp.service.TransferService.transfer(..))")  
    public void transferInstantiate(){ 
      System.out.println("bank instantiate your amount transferring"); 
    } 

Note--if the advice throws an exception, target will not be called--this is a valid use of a Before Advice.

Now you have seen the before advice, let's have a look into another type advice.