Re: WebMacro.properties & NullPointerException

paul <[email protected]> Fri, 24 Feb 2006 12:29:21 -0500

Newsgroups	gmane.comp.java.webmacro.user
Message-ID	<[email protected]>

hi viju -

i've attached a class file that loads the webmacro.properties from a 
specific location. this however in not extending the WMServlet but 
initializing webmacro independently. also for some reason this only 
works with 1.1 and not 2.0...

actually this is my question... when i initialize wm now with 2.0 i get 
a NoClassDefFoundError... what's up with this class in 2.0 and why do i 
need it in addition to the webmacro.jar?

EDU/oswego/cs/dl/util/concurrent/ConcurrentHashMap

cheers
paul


Lane Sharman wrote:
> place the wm property file in the root of the classes/ folder in your web app.
> 
> -Lane
> 
> 
>  
> --- viju <[email protected]> wrote:
>  
> *From:* viju <[email protected]>
> *Date:* Thu, 23 Feb 2006 06:39:44 -0800 (PST)
> *To:* [email protected]
> *Subject:* [WebMacro-user] WebMacro.properties & NullPointerException
> 
> Hi,
>  
> I'm facing some issue with webmacro based webapp deployed in tomcat 5.0.0.28. 
> When ever try loading my welcome page from servlet I get the following excpetion
> 
> java.lang.NullPointerException   org.webmacro.servlet.WMServlet.doPost(WMServlet.java:230)   javax.servlet.http.HttpServlet.service(HttpServlet.java:709)   javax.servlet.http.HttpServlet.service(HttpServlet.java:802)   sun.reflect.GeneratedMethodAccessor99.invoke(Unknown Source)   sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)   java.lang.reflect.Method.invoke(Method.java:324)   org.apache.catalina.security.SecurityUtil$1.run(SecurityUtil.java:239)   java.security.AccessController.doPrivileged(Native Method)   javax.security.auth.Subject.doAsPrivileged(Subject.java:500)   org.apache.catalina.security.SecurityUtil.execute(SecurityUtil.java:268)   org.apache.catalina.security.SecurityUtil.doAsPrivilege(SecurityUtil.java:157)  
> 
> < PRE>The tomcat log says the WebMacro.properties file must be classpath. But I 
> have copied this file into
> 
> tomcat/shared/lib folder. I think the Classloader for the web application should find this property file 
> 
> under this folder. 
> 
> So can somebody help understand what could be the issue here?
> 
>  
> 
> thanks in advance
> 
> Vijayendra 
> 
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500.htm (text/html, 1.7 KB)

<html><head><title>Apache Tomcat/5.0.28 - Error report</title><style><!--H1 {font-family:Tahoma,Arial,sans-serif;color:white;background-color:#525D76;font-size:22px;} H2 {font-family:Tahoma,Arial,sans-serif;color:white;background-color:#525D76;font-size:16px;} H3 {font-family:Tahoma,Arial,sans-serif;color:white;background-color:#525D76;font-size:14px;} BODY {font-family:Tahoma,Arial,sans-serif;color:black;background-color:white;} B {font-family:Tahoma,Arial,sans-serif;color:white;background-color:#525D76;} P {font-family:Tahoma,Arial,sans-serif;background:white;color:black;font-size:12px;}A {color : black;}A.name {color : black;}HR {color : #525D76;}--></style></head><body><h1>HTTP Status 500 - </h1><hr noshade="noshade" size="1"><p><b>type</b> Exception report</p><p><b>message</b> <u></u></p><p><b>description</b> <u>The server encountered an internal error () that prevented it from fulfilling this request.</u></p><p><b>exception</b> </p><pre>javax.servlet.ServletException: Servlet execution threw an exception
</pre><p></p><p><b>root cause</b> </p><pre>java.lang.NoClassDefFoundError: EDU/oswego/cs/dl/util/concurrent/ConcurrentHashMap
	org.webmacro.Broker.&lt;init&gt;(Broker.java:86)
	org.webmacro.Broker.&lt;init&gt;(Broker.java:156)
	org.webmacro.Broker.getBroker(Broker.java:502)
	org.webmacro.WM.&lt;init&gt;(WM.java:89)
	com.wmx.main.Controller.doGet(Controller.java:24)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:689)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
</pre><p></p><p><b>note</b> <u>The full stack trace of the root cause is available in the Apache Tomcat/5.0.28 logs.</u></p><hr noshade="noshade" size="1"><h3>Apache Tomcat/5.0.28</h3></body></html>

Controller.java (text/x-java, 958 B)

package com.wmx.main;

/**
 * @author psenescu
 * 
 */

import java.io.IOException;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.webmacro.Context;
import org.webmacro.WM;
import org.webmacro.WebMacro;

public class Controller extends HttpServlet {

	public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		try {
			WebMacro wm = new WM(getServletContext().getRealPath("/") + "/WEB-INF/webmacro.properties");
			Context ctx = wm.getWebContext(request, response);
			wm.writeTemplate("index.tem", response.getOutputStream(), ctx);
		} catch (Exception e) {
			response.sendError(500, e.getMessage());
		}
	}

	public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		doGet(request, response);
	}
}