Databases
StackOverflow2013
Postsdbo
POJSF 2.0 Custom Exception Handler
 

Note that there are some explanatory texts on larger screens.

plurals
  1. POJSF 2.0 Custom Exception Handler
    primarykey
    data
    text
    <p>I’m struggling fully understanding when/how exceptions are thrown in JSF 2.0. I’ve looked for a solution longer than I care to admit. Ultimately, the goal I want to achieve is “handle” an unhandled exceptions. When an exception is thrown, I want to be able to capture information of interest about the exception, and email that to the appropriate site administrators. I’m forcing an error by throwing a new FacesException() in the constructor of one of my backing beans. I had this working great in JSF 1.1 using MyFaces implementation. I was able to get this working by wrapping the Default Lifecycle and simply overriding the execute() and render() methods. I followed this awesome post by Hanspeter to get that working:</p> <p>"http://insights2jsf.wordpress.com/2009/07/20/using-a-custom-lifecycle-implementation-to-handle-exceptions-in-jsf-1-2/#comment-103" </p> <p>I am now undergoing a site upgrade to JSF 2.0 using Mojarra’s. And things work great still as long as the exception is thrown/caught in the execute() method, however; the moment I enter the render(), the HttpServletResponse.isCommitted() equals true, and the phase is PhaseId RENDER_RESPONSE which of course means I can’t perform a redirect or forward. I don’t understand what has changed between JSF 1.1 and 2.0 in regards to when/how the response is committed. As I indicated, I had this working perfectly in the 1.1 framework. After much searching I found that JSF 2.0 provides a great option for exception handling via a Custom ExceptionHandler. I followed Ed Burns’ blog, Dealing Gracefully with ViewExpiredException in JSF2:</p> <p>"http://weblogs.java.net/blog/edburns/archive/2009/09/03/dealing-gracefully-viewexpiredexception-jsf2"</p> <p>As Ed indicates there is always the web.xml way by defining the tag and what type of exception/server error code and to what page one wants sent to for the error. This approach works great as long as I’m catching 404 errors. One interesting thing to note about that however, is if I force a 404 error by typing a non-exsitant URL like /myApp/9er the error handler works great, but as soon as I add “.xhtml” extension (i.e. /myApp/9er.xhtml) then the web.xml definition doesn’t handle it.</p> <p>One thing I noticed Ed was doing that I hadn’t tried was instead of trying to do a HttpServletRespone.sendRedirect(), he is utilizing the Navigationhandler.handleNavigation() to forward the user to the custom error page. Unfortunately, this method didn’t do anything different than what Faclets does with the error by default. Along with that of course, I was unable to do HttpServletResponse.sendRedirect() due to the same problems as mentioned above; response.isCommitted() equals true.</p> <p>I know this post is getting long so I will make a quick note about trying to use a PhaseListener for the same purposes. I used the following posts as a guide with this route still being unsuccessful:</p> <p>"http://ovaraksin.blogspot.com/2010/10/global-handling-of-all-unchecked.html" "http://ovaraksin.blogspot.com/2010/10/jsf-ajax-redirect-after-session-timeout.html"</p> <p>All and all I have the same issues as already mentioned. When this exception is thrown, the response is already in the committed phase, and I’m unable to redirect/forward the user to a standard error page.</p> <p>I apologize for such a long post, I’m just trying to give as much information as possible to help eliminate ambiguity. Anyone have any ideas/thoughts to a work around, and I’m curious what might be different between JSF 1.1 and 2.0 that would cause the response to be committed as soon as I enter the render() phase of the Lifecycle.</p> <p>Thanks a ton for any help with this!!!</p>
    singulars
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PTQuestion
    1. This table or related slice is empty.
    1. USMickelback
    plurals
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PO
      singulars
      1. PTAnswer
    2. PO
      singulars
      1. PTAnswer
    1. VO
      singulars
      1. POJSF 2.0 Custom Exception Handler
      1. USrogeriolino
      1. VTFavorite
    2. VO
      singulars
      1. POJSF 2.0 Custom Exception Handler
      1. This table or related slice is empty.
      1. VTUpMod
    3. VO
      singulars
      1. POJSF 2.0 Custom Exception Handler
      1. USHendy Irawan
      1. VTFavorite
    1. This table or related slice is empty.
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload