使用Spring AOP时捕获异常后不返回值

Question

I am using Spring AOP for exception handling. I am using around advice as I want to log the input parameters.

My aspect method is like this:

public Object methodName(ProceedingJointPoint pjp){
  Object returnVal = null;
   try{
  returnVal = pjp.proceed();
 } catch(Throable t) {
   // Log exception 

 }
 return returnVal ;

}

The problem currently I am facing is : When the exception is occured I want to log the exception but I do not want to return null (returnval). Is it possible?

In the normal scenario without AOP : when some line in the method throws an Exception after that line , no other lines get executed. I want behaviour like that.

How can we ahieve it?

Answer 1

Good old checked exceptions, the Java design mistake that just keeps on biting.

Just rethrow the throwable:

public Object methodName(ProceedingJointPoint pjp) throws Throwable {

...

 try {
   return pjp.proceed();
 } catch (Throwable t) {
   // so something with t: log, wrap, return default, ...
   log.warn("invocation of " + pjp.getSignature().toLongString() + " failed", t);
   // I hate logging and re-raising, but let's do it for the sake of this example
   throw t;
 }

See here: https://stackoverflow.com/a/5309945/116509