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From Aaron Loucks <lou...@cofront.net>
Subject tld files inside jars are not auto discovered
Date Sat, 26 Nov 2005 05:44:52 GMT
I can't get TLD auto discovery to work for any custom taglibs i write 
when I package them as jars. It works fine for the standard taglibs 
(core, fmt, etc..). The tld file is packaged inside the jar as 
'/meta-inf/breadcrumbs_1_0.tld', and breadcrumbs-1.0.jar is located in 
/WEB-INF/lib. If i put a copy of the tld in the WEB-INF directory and 
add a <taglib/> entry for it in web.xml, I'm able to use the tags. I 
don't understand why Tomcat (5.0.28) is auto detecting the TLD files 
inside the standard taglibs (standard.jar), but it won't autodetect them 
in jar files i produce. Any help would be greatly appreciated.

-Aaron

test.jsp:

<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
    pageEncoding="ISO-8859-1" %>
  
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%@ taglib prefix="bc" 
uri="http://projects.cofront.net/tablibs/breadcrumbs" %>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>Breadcrumb Test</title>
</head>
<body>
    <bc:breadcrumbs separator=" &#187; " style="color:red;">
        <bc:breadcrumb href="page1.htm">page1</bc:breadcrumb>
        <bc:breadcrumb href="page2.htm">page2</bc:breadcrumb>
        <bc:breadcrumb href="page3.htm">page3</bc:breadcrumb>
    </bc:breadcrumbs>

</body>
</html>

Produces the following error:

org.apache.jasper.JasperException: The absolute uri: 
http://projects.cofront.net/tablibs/breadcrumbs         cannot be 
resolved in either web.xml or the jar files deployed with this application
    
org.apache.jasper.compiler.DefaultErrorHandler.jspError(DefaultErrorHandler.java:50)
    
org.apache.jasper.compiler.ErrorDispatcher.dispatch(ErrorDispatcher.java:411)
    
org.apache.jasper.compiler.ErrorDispatcher.jspError(ErrorDispatcher.java:118)
    
org.apache.jasper.compiler.TagLibraryInfoImpl.generateTLDLocation(TagLibraryInfoImpl.java:316)
    
org.apache.jasper.compiler.TagLibraryInfoImpl.<init>(TagLibraryInfoImpl.java:147)
    org.apache.jasper.compiler.Parser.parseTaglibDirective(Parser.java:418)
    org.apache.jasper.compiler.Parser.parseDirective(Parser.java:483)
    org.apache.jasper.compiler.Parser.parseElements(Parser.java:1539)
    org.apache.jasper.compiler.Parser.parse(Parser.java:126)
    
org.apache.jasper.compiler.ParserController.doParse(ParserController.java:220)
    
org.apache.jasper.compiler.ParserController.parse(ParserController.java:101)
    org.apache.jasper.compiler.Compiler.generateJava(Compiler.java:203)
    org.apache.jasper.compiler.Compiler.compile(Compiler.java:470)
    org.apache.jasper.compiler.Compiler.compile(Compiler.java:451)
    org.apache.jasper.compiler.Compiler.compile(Compiler.java:439)
    
org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:511)
    
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:295)
    org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:292)
    org.apache.jasper.servlet.JspServlet.service(JspServlet.java:236)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:802)

*note* _The full stack trace of the root cause is available in the 
Apache Tomcat/5.0.28 logs.



_breadcrumbs_1_0.tld:


<?xml version="1.0" encoding="UTF-8" ?>
<taglib xmlns="http://java.sun.com/xml/ns/j2ee"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee 
http://java.sun.com/xml/ns/j2ee/web-jsptaglibrary_2_0.xsd"
    version="2.0">
   
  <description>Breadcrumbs library</description>
  <display-name>Breadcrumbs</display-name>
  <tlib-version>1.1</tlib-version>
  <short-name>bc</short-name>
  <uri>http://projects.cofront.net/tablibs/breadcrumbs</uri>
  <tag>
    <description>Creates Breadcrumbs.</description>
    <name>breadcrumbs</name>
    <tag-class>net.cofront.taglibs.breadcrumbs.BreadCrumbsTag</tag-class>
    <body-content>JSP</body-content>
    <attribute>
        <description>Separator string.</description>
        <name>separator</name>
        <required>yes</required>
        <rtexprvalue>true</rtexprvalue>
    </attribute>
    <attribute>
        <description>CSS style to be applied to all breadcrumb 
links.</description>
        <name>style</name>
        <required>no</required>
        <rtexprvalue>true</rtexprvalue>
    </attribute>
    <attribute>
        <description>CSS style class to be applied to all breadcrumb 
links.</description>
        <name>styleClass</name>
        <required>no</required>
        <rtexprvalue>true</rtexprvalue>
    </attribute>
  </tag>
  <tag>
    <description>A Breadcrumb.</description>
    <name>breadcrumb</name>
    <tag-class>net.cofront.taglibs.breadcrumbs.BreadCrumbTag</tag-class>
    <body-content>JSP</body-content>
    <attribute>
        <description>URL</description>
        <name>href</name>
        <required>true</required>
        <rtexprvalue>false</rtexprvalue>
    </attribute>
  </tag>
</taglib>


web.xml:

<web-app xmlns="http://java.sun.com/xml/ns/j2ee"
  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee 
http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd"
  version="2.4">
 
    <display-name>ROOT</display-name>
 
    <servlet>
        <servlet-name>action</servlet-name>
        
<servlet-class>org.apache.struts.action.ActionServlet</servlet-class>
        <init-param>
            <param-name>config</param-name>
            <param-value>/WEB-INF/config/struts-config.xml</param-value>
        </init-param>
        <load-on-startup>1</load-on-startup>
    </servlet>
   
    @maven.tomcat.generated@
   
    <servlet-mapping>
        <servlet-name>action</servlet-name>
        <url-pattern>*.do</url-pattern>
    </servlet-mapping>
 
    <jsp-config>
    <!--
        <taglib>
            
<taglib-uri>http://projects.cofront.net/taglibs/breadcrumbs</taglib-uri>
            <taglib-location>/WEB-INF/breadcrumbs_1_0.tld</taglib-location>
        </taglib>
    -->
    </jsp-config>
   
    <welcome-file-list>
        <welcome-file>index.html</welcome-file>
        <welcome-file>index.htm</welcome-file>
        <welcome-file>index.jsp</welcome-file>
    </welcome-file-list>   

</web-app>


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