This is definitivly a bug in resin. Tomcat resuses the tags but but the initialize for each new loop. This is described in the jsp definitions as tag reusing. This tag reusing is the reason why we introduce the doFinally once. So i will not change this in dbforms.
Best regards, Henner > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] On > Behalf Of [EMAIL PROTECTED] > Sent: Wednesday, October 18, 2006 12:25 AM > To: jdbforms-interest@lists.sourceforge.net > Subject: [dbforms] DbForms and Resin. Null pointer exception. > > Hi all, > > I just ported by DbForms App from Tomcat 5.5 to Resin and > found that most of the tags don't work in a looped > environment (ie displaying a list of records). In this case > the first tag works but for all subsequent tags you get a > null pointer exception. > > I know that in the past there have been various messages > posted regarding Resin so I thought that I'd share my findings. > > After analysing the java file generated by Resin and Tomcat I > found that the way Tomcat processes tags is by creating a new > instance of the tag for each loop iteration. > > Tags in the Resin java generated file are defined at class > level. For each loop iteration it processes the tag and calls > the dofinally routine which clears all tag information (it > also initialises the tag on the first iteration only by > checking if the tag is null), thus the subsequent loop fails > as all the internals are set to null. > > The solution (and it is a hack) is to comment out the > contents of the doFinally methods for each tag that could be > used in a looping situation. Once this is done there does not > seem to be any other inherent problem with Resin. > > Jez. > > -------------------------------------------------------------- > ----------- > Using Tomcat but need to do more? Need to support web > services, security? > Get stuff done quickly with pre-integrated technology to make > your job easier Download IBM WebSphere Application Server > v.1.0.1 based on Apache Geronimo > http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&; dat=121642 > _______________________________________________ > DbForms Mailing List > > http://www.wap-force.net/dbforms > ------------------------------------------------------------------------- Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642 _______________________________________________ DbForms Mailing List http://www.wap-force.net/dbforms
