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From Bill Siggelkow <>
Subject Re: I'm completely lost, please help...
Date Tue, 21 Dec 2004 14:50:06 GMT

It sounds like you are definitely reaching frustration level. I do not 
have experience on Mac OS X but I can tell you my WinXP experience. 
First, I don't use the Sysdeo plug-in; I just start and stop tomcat 
manually -- I *do* utilize Eclipse's Ant integration to run my builds; 
this works fine. As far as development, when developing I add the 
jsp-api.jar and servlet-api.jar to my project's build path; I also 
reference these jars in my compile path in my Ant script; however, I do 
not include these jars in my WEB-INF/classes as they are part of 
Tomcat's system classpath.

As far as my Ant build; I build a War file with the 'dist' target; and 
then deploy by extracting the WAR into Tomcat's webapps directory. There 
are other techniques; one popular approach is to point your Tomcat to 
your application's working development (web) directory; this will let 
you develop on-the-fly without needing to restart Tomcat.

I suggest you get a simple application working the way you want. Then 
you can start on your custom tag app.

-Bill Siggelkow

Eric D. Nielsen wrote:
> Long post follows...    I don't know if its an Eclipse, Tomcat or  
> Struts problem...
> I've been trying to get started on Java Web Development using Eclipse,  
> Tomcat, and Struts for the past several weeks.   Sometime last week I  
> got both simple JSP's (no custom logic) and the same JSP's using Tiles  
> working.  I've been trying to work on my first custom tag.  I'm  
> developing on a Mac OS X 10.3 platform.
> I had to fiddle a lot for the application wide class path and the  
> project-specific class path to get the jsp-api.jar reachable.  Once I  
> got that fixed the base classes were resolve-able and my classes  
> compiled.  However, the default build from Eclipse, using the Tomcat  
> project template from the Sysdeo plugin, did not appear to put class  
> files into the correct location for Tomcat to use them (ie not in  
> WEB-INF/classes/<package>/).
> I looked at the Eclipse In Action book published by Manning to for how  
> to invoke Ant from inside Eclipse and use the provided build.xml file  
> included in the sample Struts application.
> I had to add classpaths to the build.xml to locate servlet-api.jar and  
> jsp-api.jar. Once that was done Ant could compile the files and the  
> directory structure looked correct.  I had a typo in the package for my  
> tag handler in the .tld.  After I fixed that I started getting:
> javax.servlet.ServletExceptions with the root cause as  
> java.lang.NoClassDefFoundError: javax/servlet/Servlet
> At which point I started working backward, removing custom components  
> from my JSP's, until it was only the Tiles and static template content,  
> but I got the same errors.  I had been restarting Tomcat several times  
> throughout this process from the Sysdeo plugin for Eclipse and didn't  
> see anything suspicious in the log.
> I now tried the root web-application (default Tomcat install) and  
> received:
> javax.servlet.ServletException: Error allocating a servlet instance  
> org.apache.catalina.values.ErrorReportValue.invoke( 
> : 105)
> At this point I tried stopping and restarting Tomcat from the  
> command-line instead of from within Eclipse.   The root application  
> started working.
> My development application however now shows 1 of 2 behaviors:
> 1) Blank page, no content in view source:  direct request for a simple  
> complete jsp (only template text, valid HTML) or for the basic template  
> with an <p>Hi</p> as the body.  These pages only use the /tags/tiles  
> taglib.
> 2)
> org.apache.jasper.JasperException: Failed to load or instantiate  
> TagExtraInfo class: org.apache.struts.taglib.logic.IterateTei
> org.apache.jasper.compiler.DefaultErrorHandler.jspError(DefaultErrorHand 
> on any page that includes the /tags/struts-logic taglib.
> I'm afraid I've corrupted by install of Tomcat or Struts somehow.  I  
> haven't done that much actual development, so re-installing everything  
> is doable, but the amount of cross application configuration is  
> daunting even with the help on-line tutorials and both the Eclipse in  
> Action and Struts in Action books.  None of the tutorials indicated  
> either of the problems with adding the jsp-api.jar to the eclipse  
> and/or Ant classpaths nor the configuration required for .classes to  
> end up in /WEB-INF/class.  Does anyone know if Mac OS X has serious  
> issues with the "normal" configurations that would be causing those  
> problems?  Does anyone know what I did that cased the ServletExceptions  
> near the end of my story or why it can't find struts-logic anymore  
> while it can still find tiles? Any other advice?
> Thank you.
> Eric

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