I am not sure what is implied by the below messages: Using netbeans I am able to
debug servlets debug jsp's (a little buggy but it works) debug action classes and form classes. I am not sure if this all works remotely or not. logging is always a good idea. Sandeep --- "Kilmer, Erich" <[EMAIL PROTECTED]> wrote: > Hi Keith, > Thanks for your reply. > I do use already many of the techniques listed in > your email as well as > log4j. > I do not have any problem catching errors in form > and actions classes. > I do have problem finding errors that come out of > the html tags in JSPs. > If there is a bad mapping and an html:form's action > point to the mapping > with a problem I do not see any errors in any of the > logs. I have modified > my error.jsp in hopes of seeing more but so far > nothing. > If I have better luck with this I will let the group > know. > Developing in Struts would be much faster if there > was a way to diagnose > such problems. > Erich > > -----Original Message----- > From: Keith Bacon > [mailto:[EMAIL PROTECTED]] > Sent: Wednesday, January 09, 2002 8:54 AM > To: Struts Users Mailing List > Subject: Re: Question on Struts debugging - one more > time > > > I've not had better luck. I think it's the way it > is. > Here's how I do it - I'd like to know how others do. > > I use hundreds of log messages so I can trace the > flow of my program. I make > the method calls for > logging easy to type - dbmd("a debug msg") or > dbmw("warning message"). > I code traces into action classes from the start. to > show the perform method > starting & ending so > a dud struts config is found because the Action i > expect to run doesn't log > it's start. > I check for null pointers all over the place & log a > warning or throw an > exception for them. > I constantly restart the server (tomcat 3.2.2) to > make weird problems go > away. > Auto class reloading doesn't work properly so - I > restart after every > compile. > > I use these 3 methods in jsp's & Action classes a > lot, to check the contents > of the session & > request - this finds things left in the session by > mistake. > public static void > printSessionAttributeNames(String caller, > HttpSession session) { > public static void > printRequestAttributeNames(String caller, > HttpServletRequest request) { > public static void printRequestParameters(String > caller, > HttpServletRequest request) { > I've attached the code for them, someone may find > them useful - the codes a > bit dodgy & old but > it's easy to understand. > > I have my own logging code (from old servlet > programming) but I want to use > log4j (one day!) - You > really need to be able to switch trace messages > on/off without re-compiling > classes or restarting > the server. > > Only when it's quite reliable do I remove the > messages. Often I just comment > the mesages out in > expectation it will go wrong in future. > > All in all a bit primitive compared to some > (non-web) environments I've > worked in. we're in the > early days - things will get easier. We'll get > informative/instructive > messages that tell us what > to do to put it right & we'll be able to step thru > our action classes in the > debugger. > > Happy bug hunting! - Keith > > > --- "Kilmer, Erich" > <[EMAIL PROTECTED]> wrote: > > Thought I would give this one more try. Has anyone > had better luck with > > debugging problems caused by say bad action > mappings, ie: mis-named action > > classes, missing action forms etc. Currently when > these problems are > > encountered I see no useful error messages in any > of my logs (even when > > debug is set to 2). > > Is this just the way that it is or have I failed > to do something? > > > > Thanks, > > Erich > > > > Sent previously: > > > > I have been using Struts for some time now. My > app's Struts config file > has > > almost 50 action mappings so I have been down this > road a time or two. > > Many times when adding a new mapping I run into > errors though. For example > > the latest on was where the mapping listed an > action class called > something > > like UserCreateAction (package removed). But when > I wrote the class itself > I > > named it UserAddAction. > > Now when I built the app and moved to the Orion > apps server and ran it > when > > I get to the JSP that references this action > mapping I get a null > exception. > > Typically I do not catch exceptions in a JSP and > the uncaught exceptions > go > > to my error JSP where it states that the exception > is null. > > So I go into my web.xml file and change the debug > param to 2. I also > changed > > detail to 2. (By the way what does detail = 2 do?) > > Then I re-ran everything after rebuilding and > re-deploying. The app still > > does the same thing. > > OK, fine now I go to check the logs. I check the > apps server log where > > system outs go. I see no Struts messages except > for the flurry of them at > > startup. I look at the log4j error logs and see > nothing. I also looked at > > the apps servers application log where I see some > Struts messages but see > > nothing about this error. > > > > So my Struts debugging question is this. Are > errors encountered when > > converting the Struts tags in my JSP written > anywhere? Is there more debug > > settings I must make? Is there another log that I > can check? > > > > I know this is a fairly simple example and I am > getting better at > debugging > > them but it would be nice if there was someway to > make this so I check the > > log and it says that "Action class > UserCreateAction does not exist". > > > > Let me know, > > Erich Kilmer > > Bell+Howell > > > > > > > > -- > > To unsubscribe, e-mail: > > > <mailto:[EMAIL PROTECTED]> > > For additional commands, e-mail: > > <mailto:[EMAIL PROTECTED]> > > > > -- > > To unsubscribe, e-mail: > <mailto:[EMAIL PROTECTED]> > > For additional commands, e-mail: > <mailto:[EMAIL PROTECTED]> > > > > > __________________________________________________ > Do You Yahoo!? > Send FREE video emails in Yahoo! Mail! > === message truncated === __________________________________________________ Do You Yahoo!? Send FREE video emails in Yahoo! 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