Not a valid tag lib

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posted 24 years ago

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Hi,
I have defined a custom tag but when try to run the jsp using the same in Weblogic5.1 an exception is raised. javax.servlet.ServletException: compilation of /tag/tag1.jsp failed: weblogic.utils.ParsingException: nested IOException: java.io.IOException: cannot resolve 'MyFirst.tld' into a valid tag library
I am attaching the code of the tld as well as jsp for review. Both the jsp and the tld file are in the same directory.
TLD FILE:

<?xml version="1.0" encoding="ISO-8859-1" ?>
<!DOCTYPE taglib PUBLIC "-//Sun Microsystems, Inc.//DTD JSP Tag Library 1.1//EN" "http://java.sun.com/j2ee/dtds/web-jsptaglibrary_1_1.dtd">
<taglib>
<tlibversion>1.0</tlibversion>
<jspversion>1.1</jspversion>
<shortname>FirstSample</shortname>
<info>Tag library</info>
  <!-A Simple tag -->
<tag>
    <name>hello</name>
    <tagclass>MyFirstTagHandler</tagclass>

    <bodycontent>JSP</bodycontent>
    <info>
This is a simple hello tag.
    </info>
    
    
    
    <attribute>
      <name>name</name>
      <required>false</required> 
   <rtexpvalue>true</rtexpvalue>
    </attribute>
    <!-allow for the jsp coder to specify how many times to iterate -->
    <attribute>
      <name>iterations</name>
      <required>false</required> 
   <rtexpvalue>false</rtexpvalue>
    </attribute>
</tag>
</taglib>
JSP FILE:
<%@ taglib uri="MyFirst.tld" prefix="FirstSample" %>
<%
    // allow a username to be passed in the request
    String userName = request.getParameter("NAME");
    userName="Vishal";
%>
<html>
        <head>
                <title>Your Standard Hello World Demo</title>
        </head>
        <body bgcolor="#ffffff">
                <hr />
                <FirstSample:hello name="<%= userName %>" iterations="2">
<tr><td><b>Have a nice day</b></td></tr>
</FirstSample:hello>
                <hr />
        </body>
</html>
The code for the implementer class:
import javax.servlet.jsp.tagext.*;
import javax.servlet.jsp.*;
import java.io.*;
public class MyFirstTagHandler extends BodyTagSupport 
{
private String name=null;
    private int iterations=1;
/**
     * Getter/Setter for the attribute name as defined in the tld file
     * for this tag
     */
public void setName(String value)
{
name = value;
}
public String getName()
{
return(name);
}
/**
     * Getter/Setter for the attribute iterations as defined in the tld file
     * for this tag
     */
public void setIterations(String value)
{
    try 
{
       iterations = Integer.parseInt(value);
     } 
catch(NumberFormatException nfe) 
{
       iterations = 1;
     }
   }
public String getIterations()
{
return(Integer.toString(iterations));
}
    public int doStartTag() throws JspTagException
{
 try 
{
        JspWriter out = pageContext.getOut();
        out.println("<table border=\"1\">");
     if (name != null)
      out.println("<tr><td> Hello " + name + " </td></tr>");
        else
      out.println("<tr><td> Hello World <td></tr>");
} 
catch (Exception ex) 
{
    throw new JspTagException("All is not well in the world." + ex );
  }
  // Evaluate the body if there is one
  return EVAL_BODY_TAG;
    }
public int doEndTag()throws JspTagException 
{
try 
{
        JspWriter out = pageContext.getOut();
       out.println("</table>");
   } 
catch (Exception ex)
{
    throw new JspTagException("All is not well in the world." + ex);
   }
return EVAL_PAGE;
}
public int doAfterBody() throws JspTagException 
{
    if ((iterations--) >= 1) 
{
   BodyContent body = getBodyContent();
    try 
{
// Make sure we put anything in the output stream in the
// body to the output stream of the JSP
        JspWriter out = body.getEnclosingWriter();
        out.println(body.getString());
        body.clearBody(); // Clear for next evaluation
      } 
catch(IOException ioe) 
{
        throw new JspTagException("Error in Hello tag doAfterBody " + ioe);
      }
      return(EVAL_BODY_TAG);
    } 
else 
{
    return(SKIP_BODY);
}
}
}

Pls. help in solving the problem.
Thanx in anticipation,
Vishal
[This message has been edited by maha anna (edited April 23, 2001).]

ajay gaur

Greenhorn

Posts: 16

posted 23 years ago

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Put ur .tld file in the META-INF folder in document root dir.

Originally posted by Vishu Sharma:
[B]Hi,
I have defined a custom tag but when try to run the jsp using the same in Weblogic5.1 an exception is raised. javax.servlet.ServletException: compilation of /tag/tag1.jsp failed: weblogic.utils.ParsingException: nested IOException: java.io.IOException: cannot resolve 'MyFirst.tld' into a valid tag library
I am attaching the code of the tld as well as jsp for review. Both the jsp and the tld file are in the same directory.
TLD FILE:
<?xml version="1.0" encoding="ISO-8859-1" ?> <!DOCTYPE taglib PUBLIC "-//Sun Microsystems, Inc.//DTD JSP Tag Library 1.1//EN" "http://java.sun.com/j2ee/dtds/web-jsptaglibrary_1_1.dtd"> <taglib> <tlibversion>1.0</tlibversion> <jspversion>1.1</jspversion> <shortname>FirstSample</shortname> <info>Tag library</info> <!-A Simple tag --> <tag> <name>hello</name> <tagclass>MyFirstTagHandler</tagclass>  <bodycontent>JSP</bodycontent> <info> This is a simple hello tag. </info>   <attribute> <name>name</name> <required>false</required> <rtexpvalue>true</rtexpvalue> </attribute> <!-allow for the jsp coder to specify how many times to iterate --> <attribute> <name>iterations</name> <required>false</required> <rtexpvalue>false</rtexpvalue> </attribute> </tag> </taglib> JSP FILE: <%@ taglib uri="MyFirst.tld" prefix="FirstSample" %> <% // allow a username to be passed in the request String userName = request.getParameter("NAME"); userName="Vishal"; %> <html> <head> <title>Your Standard Hello World Demo</title> </head> <body bgcolor="#ffffff"> <hr /> <FirstSample:hello name="<%= userName %>" iterations="2"> <tr><td><b>Have a nice day</b></td></tr> </FirstSample:hello> <hr /> </body> </html> The code for the implementer class: import javax.servlet.jsp.tagext.*; import javax.servlet.jsp.*; import java.io.*; public class MyFirstTagHandler extends BodyTagSupport { private String name=null; private int iterations=1; /** * Getter/Setter for the attribute name as defined in the tld file * for this tag */ public void setName(String value) { name = value; } public String getName() { return(name); } /** * Getter/Setter for the attribute iterations as defined in the tld file * for this tag */ public void setIterations(String value) { try { iterations = Integer.parseInt(value); } catch(NumberFormatException nfe) { iterations = 1; } } public String getIterations() { return(Integer.toString(iterations)); } public int doStartTag() throws JspTagException { try { JspWriter out = pageContext.getOut(); out.println("<table border=\"1\">"); if (name != null) out.println("<tr><td> Hello " + name + " </td></tr>"); else out.println("<tr><td> Hello World <td></tr>"); } catch (Exception ex) { throw new JspTagException("All is not well in the world." + ex ); } // Evaluate the body if there is one return EVAL_BODY_TAG; } public int doEndTag()throws JspTagException { try { JspWriter out = pageContext.getOut(); out.println("</table>"); } catch (Exception ex) { throw new JspTagException("All is not well in the world." + ex); } return EVAL_PAGE; } public int doAfterBody() throws JspTagException { if ((iterations--) >= 1) { BodyContent body = getBodyContent(); try { // Make sure we put anything in the output stream in the // body to the output stream of the JSP JspWriter out = body.getEnclosingWriter(); out.println(body.getString()); body.clearBody(); // Clear for next evaluation } catch(IOException ioe) { throw new JspTagException("Error in Hello tag doAfterBody " + ioe); } return(EVAL_BODY_TAG); } else { return(SKIP_BODY); } } }
Pls. help in solving the problem.
Thanx in anticipation,
Vishal
[This message has been edited by maha anna (edited April 23, 2001).][/B]

Cynthia Yao

Ranch Hand

Posts: 92

posted 23 years ago

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please check the error log on weblogic, it will show you that it looks under /WEB-INF folder first under the doc root. or the similiar information can be obtained through standard output if you use shell to run weblogic