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From Martin Gainty <mgai...@hotmail.com>
Subject RE: Missing something with custom tags.
Date Wed, 02 Feb 2011 22:25:07 GMT

need to see the tld declaration for your tags
and the Java class declared for the tag

pls ping me offline

Martin 
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> Date: Wed, 2 Feb 2011 14:03:54 -0800
> From: billdsd@gmail.com
> To: users@tomcat.apache.org
> Subject: Missing something with custom tags.
> 
> version "1.6.0_20", Java(TM) SE Runtime Environment (build 
> 1.6.0_20-b02), Java HotSpot(TM) 64-Bit Server VM (build 16.3-b01, mixed 
> mode)
> Tomcat: 6.0.26
> 
> I'm having trouble with a custom tag and I've tried to reduce the 
> problem to its most basic form:
> 
> /WEB-INF/tags/example.tag:
> 
> <%@tag %>
> <%@attribute name="xName" required="true" rtexprvalue="true" %>
> <h1>xName="${xName}"</h1>
> 
> /jsp/Example.jsp:
> 
> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" 
> "http://www.w3.org/TR/html4/strict.dtd">
> <%@page language="java" contentType="text/html; charset=UTF-8" 
> pageEncoding="UTF-8" %>
> <%@taglib prefix="ex" tagdir="/WEB-INF/tags" %>
> <html>
> <body>
> <ex:example xName="Testing Example" />
> </body>
> </html>
> 
> I usually get:
> 
> You have run into a org.apache.jasper.JasperException: 
> /jsp/Example.jsp(6,4) Unable to find setter method for attribute: xName 
> error.
> 
> But sometimes I get this:
> 
> You have run into a java.lang.ClassNotFoundException: 
> org.apache.jsp.jsp.Example_jsp error.
> 
> Any idea what I'm doing wrong?  From what I can see, my code seems to mirror
> examples I've found in books and on the web.  Intermittent results 
> suggest a race
> condition to me though that seems odd here.  I've not had good luck with 
> google on
> this error.
> 
> Full stack traces for the exceptions here:
> 
> Feb 2, 2011 1:55:02 PM org.apache.catalina.core.StandardWrapperValve invoke
> SEVERE: Servlet.service() for servlet jsp threw exception
> org.apache.jasper.JasperException: /jsp/Example.jsp(6,4) Unable to find 
> setter method for attribute: xName
>          at 
> org.apache.jasper.compiler.DefaultErrorHandler.jspError(DefaultErrorHandler.java:40)
>          at 
> org.apache.jasper.compiler.ErrorDispatcher.dispatch(ErrorDispatcher.java:407)
>          at 
> org.apache.jasper.compiler.ErrorDispatcher.jspError(ErrorDispatcher.java:148)
>          at 
> org.apache.jasper.compiler.Generator$GenerateVisitor.evaluateAttribute(Generator.java:2809)
>          at 
> org.apache.jasper.compiler.Generator$GenerateVisitor.generateSetters(Generator.java:3032)
>          at 
> org.apache.jasper.compiler.Generator$GenerateVisitor.generateCustomDoTag(Generator.java:2452)
>          at 
> org.apache.jasper.compiler.Generator$GenerateVisitor.visit(Generator.java:1736)
>          at org.apache.jasper.compiler.Node$CustomTag.accept(Node.java:1530)
>          at org.apache.jasper.compiler.Node$Nodes.visit(Node.java:2361)
>          at 
> org.apache.jasper.compiler.Node$Visitor.visitBody(Node.java:2411)
>          at org.apache.jasper.compiler.Node$Visitor.visit(Node.java:2417)
>          at org.apache.jasper.compiler.Node$Root.accept(Node.java:495)
>          at org.apache.jasper.compiler.Node$Nodes.visit(Node.java:2361)
>          at 
> org.apache.jasper.compiler.Generator.generate(Generator.java:3440)
>          at 
> org.apache.jasper.compiler.Compiler.generateJava(Compiler.java:231)
>          at org.apache.jasper.compiler.Compiler.compile(Compiler.java:347)
>          at org.apache.jasper.compiler.Compiler.compile(Compiler.java:327)
>          at org.apache.jasper.compiler.Compiler.compile(Compiler.java:314)
>          at 
> org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:592)
>          at 
> org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:317)
>          at 
> org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:313)
>          at 
> org.apache.jasper.servlet.JspServlet.service(JspServlet.java:260)
>          at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
>          at 
> org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
>          at 
> org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
>          at 
> org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
>          at 
> org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
>          at 
> org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
>          at 
> org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
>          at 
> org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:555)
>          at 
> org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
>          at 
> org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:298)
>          at 
> org.apache.jk.server.JkCoyoteHandler.invoke(JkCoyoteHandler.java:190)
>          at 
> org.apache.jk.common.HandlerRequest.invoke(HandlerRequest.java:291)
>          at 
> org.apache.jk.common.ChannelSocket.invoke(ChannelSocket.java:774)
>          at 
> org.apache.jk.common.ChannelSocket.processConnection(ChannelSocket.java:703)
>          at 
> org.apache.jk.common.ChannelSocket$SocketConnection.runIt(ChannelSocket.java:896)
>          at 
> org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:690)
>          at java.lang.Thread.run(Thread.java:619)
> 
> Feb 2, 2011 1:55:29 PM org.apache.catalina.core.StandardWrapperValve invoke
> SEVERE: Servlet.service() for servlet jsp threw exception
> java.lang.ClassNotFoundException: org.apache.jsp.jsp.Example_jsp
>          at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
>          at java.security.AccessController.doPrivileged(Native Method)
>          at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
>          at 
> org.apache.jasper.servlet.JasperLoader.loadClass(JasperLoader.java:134)
>          at 
> org.apache.jasper.servlet.JasperLoader.loadClass(JasperLoader.java:66)
>          at 
> org.apache.jasper.JspCompilationContext.load(JspCompilationContext.java:628)
>          at 
> org.apache.jasper.servlet.JspServletWrapper.getServlet(JspServletWrapper.java:144)
>          at 
> org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:329)
>          at 
> org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:313)
>          at 
> org.apache.jasper.servlet.JspServlet.service(JspServlet.java:260)
>          at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
>          at 
> org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
>          at 
> org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
>          at 
> org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
>          at 
> org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
>          at 
> org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
>          at 
> org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
>          at 
> org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:555)
>          at 
> org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
>          at 
> org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:298)
>          at 
> org.apache.jk.server.JkCoyoteHandler.invoke(JkCoyoteHandler.java:190)
>          at 
> org.apache.jk.common.HandlerRequest.invoke(HandlerRequest.java:291)
>          at 
> org.apache.jk.common.ChannelSocket.invoke(ChannelSocket.java:774)
>          at 
> org.apache.jk.common.ChannelSocket.processConnection(ChannelSocket.java:703)
>          at 
> org.apache.jk.common.ChannelSocket$SocketConnection.runIt(ChannelSocket.java:896)
>          at 
> org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:690)
>          at java.lang.Thread.run(Thread.java:619)
> 
> 
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