java - EJB容器中RuntimeException和@ApplicationException(rollback=true)Exception的区别

Question

我在 JSF bean 中这样调用 account EJB 方法:

try{
   account.someFunction(...);
}catch(SimRuntimeException e){
   logger.log(Level.FATAL, "SimRuntimeException catched !");
}catch(SimNotRuntimeException e){
   logger.log(Level.FATAL, "SimNotRuntimeException catched !");
}catch(Exception e){
   logger.log(Level.FATAL, "Exception catched !");
}

我的异常(exception):

public class SimRuntimeException extends RuntimeException {

   public SimRuntimeException() {
      super();
   }

}



@ApplicationException(rollback=true)
public class SimNotRuntimeException extends Exception {

   public SimNotRuntimeException() {
      super();  
   }


}

• 当 account.someFunction(...); 抛出 SimRuntimeException 我摔倒了进入 Exception block ，因为我的 SimRuntimeException 被包装了可能通过 EJB 容器进入 EJBException。
• 当 account.someFunction(...); 抛出 SimNotRuntimeException 我按预期跌倒进入 SimNotRuntimeException

那么，请问 Exception 与 @ApplicationException(rollback=true) 和 RuntimeException 之间的具体区别是什么？

Answer 1

Pal's blog状态:

EJB makes a difference in Application Exceptions and System Exceptions. Application exception is something that you define, you throw, and you are aware of. By default the application exception does not cause a rollback, unless you define it that way (and I think it's recommended). Every checked exception that is mentioned in the method signature and also any checked or unchecked exception that is annotated with @ApplicationException, is an application exception.

System exceptions happen in cases, you don't control, and they are unchecked exceptions. They always cause rollback. Good practice is, if you wrap checked exceptions -- that cannot be avoided -- in your method into EJBException e.g. ParseException.