Win a copy of Testing JavaScript Applications this week in the HTML Pages with CSS and JavaScript forum!
  • Post Reply Bookmark Topic Watch Topic
  • New Topic
programming forums Java Mobile Certification Databases Caching Books Engineering Micro Controllers OS Languages Paradigms IDEs Build Tools Frameworks Application Servers Open Source This Site Careers Other all forums
this forum made possible by our volunteer staff, including ...
Marshals:
  • Campbell Ritchie
  • Bear Bibeault
  • Ron McLeod
  • Jeanne Boyarsky
  • Paul Clapham
Sheriffs:
  • Tim Cooke
  • Liutauras Vilda
  • Junilu Lacar
Saloon Keepers:
  • Tim Moores
  • Stephan van Hulst
  • Tim Holloway
  • fred rosenberger
  • salvin francis
Bartenders:
  • Piet Souris
  • Frits Walraven
  • Carey Brown

Exception cast in Java

 
Ranch Hand
Posts: 117
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
In a simple web application(No Struts or Spring), lets say i am getting an exception in the business layer and i want that to be sent to the UI layer for some reasons.
How can this be acheived? I have heard something like exception cast in Java. I googled for this,but i was not able to get the required informaton.
Can anyone please let me know the details?

Cheers
 
Bartender
Posts: 4568
9
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
I'm not sure what you mean by exception cast. The easiest way to get an exception from the business layer to the UI is just to throw it (or not catch it) - it will bubble up until you handle it, and if you only handle it in the UI that's where it will end up.

One thing that's quite common (and that might be what you're looking for) is when you want the business layer to throw a particular special type of exception so the UI doesn't have to know about the internal workings. Then you can catch a general exception, wrap it in your special one, and throw that. The pattern looks something like this:

 
This will take every ounce of my mental strength! All for a tiny ad:
Thread Boost feature
https://coderanch.com/t/674455/Thread-Boost-feature
    Bookmark Topic Watch Topic
  • New Topic