displaying sql exception in JSF

Question

I was wondering how would I be able to show SQL errors generated during update, delete, select * etc in JSF.

Any help would be appreciated.

Answer 1

You have three options:

1. Let the exception bubble up (either declare your action methods throws SQLException, or wrap them in RuntimeException

2. catch the SQLException and add it as a JSF message, which is more readable. The format is up to you.

   String msg = obtainFormattedMessageFromException(exception);
   FacesMessage facesMessage = 
     new FacesMessage(FacesMessage.SEVERITY_ERROR, msg, msg);
   FacesContext.getCurrentInstance().addMessage(null, facesMessage);
   

3. Don't show them (best option). These exceptions would confuse the user. Instead, log them (using log4j, commons-logging, or whatever) to a log file, which you will be able to read later. Show only a generic message to the user that something went wrong.