Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people, just like you, are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
Solved

Velocity Templating question

Posted on 2002-06-26
7
397 Views
Last Modified: 2013-11-24
Hello,

Im trying to get to know the velocity templating engine.  Ive installed velocity, and i have working examples.  However, im trying to configure my VelocityServlet (child of..) to use templates from my template directory, but its not doing this.. i have the relative path to my properties file in my web.xml , and my properties file in turn has the entry :

file.resource.loader.path = /template

The templates, (weirdly) are being found.. but not where i expect them to be - they are in a completely seperate web application.  Its almost as though there is a general properties file over-riding the new one which i secify in loadConfiguration ();

The path to the props file is being read from the web.xml ok, and the path to the template directory is also reported in loadConfiguration as being correct..

any help appreciated..


package com.mehdi.cms;


import java.io.IOException;
import java.io.FileNotFoundException;

import java.util.Properties;
import java.util.Vector;

import javax.servlet.ServletConfig;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.velocity.Template;
import org.apache.velocity.context.Context;
import org.apache.velocity.servlet.VelocityServlet;
import org.apache.velocity.app.Velocity;
import org.apache.velocity.exception.ResourceNotFoundException;
import org.apache.velocity.exception.ParseErrorException;

import java.io.*;
import java.util.*;


public class Test extends VelocityServlet
{

    protected Properties loadConfiguration(ServletConfig config )
        throws IOException, FileNotFoundException
    {

        String propsFile = config.getInitParameter(INIT_PROPS_KEY);
        if ( propsFile != null )
        {
            String realPath = getServletContext().getRealPath(propsFile);

            if ( realPath != null )
            {
                propsFile = realPath;
            }
        }

       Properties p = new Properties();
       p.load( new FileInputStream(propsFile) );
       String path = p.getProperty("file.resource.loader.path");

       if (path != null)
       {
           path = getServletContext().getRealPath( path );
           p.setProperty( "file.resource.loader.path", path );
       }

       System.out.println(">>" + p.getProperty("file.resource.loader.path"));//THIS IS CORRECT !

       path = p.getProperty("runtime.log");

       if (path != null)
       {
           path = getServletContext().getRealPath( path );
           p.setProperty("runtime.log", path );
       }

       return p;
    }

    public Template handleRequest( HttpServletRequest request,
     HttpServletResponse response, Context ctx )
    {
        String p1 = "doo";
        String p2 = "daa";

        Vector personList = new Vector();
        personList.addElement( p1 );
        personList.addElement( p2 );

        ctx.put("theList", personList );

        Template outty = null;

        try
        {
            outty =  getTemplate("mehdi.vm");
        }
        catch( ParseErrorException pee )
        {
            System.out.println("SampleServlet : parse error for template " + pee);
        }
        catch( ResourceNotFoundException rnfe )
        {
            System.out.println("SampleServlet : template not found " + rnfe);
        }
        catch( Exception e )
        {
            System.out.println("Error " + e);
        }
        return outty;
    }
}
0
Comment
Question by:mehdi
  • 3
  • 3
7 Comments
 
LVL 92

Accepted Solution

by:
objects earned 50 total points
ID: 7112219
I'd recomend using the class loader to access your properties files instead of specifying location on disk.
Either by using ResourceBundle, ClassLoader.getSystemResourceAsStream, or Class.getResourceAsStream.
0
 
LVL 1

Author Comment

by:mehdi
ID: 7122174
Ok Objects,

Thanks for the suggestion, here is what i have now in my loadConfig.  I have put velocity.properties in my classpath, and it is being picked up fine.. still no joy though.  Still the templates are not being read from where i want them to be read.

Thanks,

Mehdi


    protected Properties loadConfiguration(ServletConfig config )
        throws IOException, FileNotFoundException
    {

       Properties p = new Properties();
       p.load(ClassLoader.getSystemResourceAsStream("velocity.properties"));
       System.out.print("WE ARE USING : " + p.getProperty(Velocity.FILE_RESOURCE_LOADER_PATH));
       return p;
    }

0
 
LVL 1

Author Comment

by:mehdi
ID: 7122183
.. needless to say of course that the following line is in my velocity.properties :

file.resource.loader.path=D:\\webcontainer\\mehdi_cms\\templates

regards,

Mehdi
0
How Do You Stack Up Against Your Peers?

With today’s modern enterprise so dependent on digital infrastructures, the impact of major incidents has increased dramatically. Grab the report now to gain insight into how your organization ranks against your peers and learn best-in-class strategies to resolve incidents.

 
LVL 92

Expert Comment

by:objects
ID: 7123344
What directory is the properties file that is being loaded in?
ANd what is the base directory of your webapp?
0
 
LVL 1

Author Comment

by:mehdi
ID: 7124122
velocity.properties is in :

d:\classes\velocity.properties

contains :
file.resource.loader.path=D:\\webcontainer\\mehdi_cms\\templates

and my webapp is in

D:\webcontainer\mehdi_cms

Cheers,

Mehdi



0
 
LVL 35

Expert Comment

by:girionis
ID: 8893353
No comment has been added lately, so it's time to clean up this TA.

I will leave a recommendation in the Cleanup topic area that this question is:

- To be deleted and points refunded

Please leave any comments here within the
next seven days.

PLEASE DO NOT ACCEPT THIS COMMENT AS AN ANSWER !

girionis
Cleanup Volunteer
0
 
LVL 92

Expert Comment

by:objects
ID: 8897976
0

Featured Post

Announcing the Most Valuable Experts of 2016

MVEs are more concerned with the satisfaction of those they help than with the considerable points they can earn. They are the types of people you feel privileged to call colleagues. Join us in honoring this amazing group of Experts.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

This was posted to the Netbeans forum a Feb, 2010 and I also sent it to Verisign. Who didn't help much in my struggles to get my application signed. ------------------------- Start The idea here is to target your cell phones with the correct…
Basic understanding on "OO- Object Orientation" is needed for designing a logical solution to solve a problem. Basic OOAD is a prerequisite for a coder to ensure that they follow the basic design of OO. This would help developers to understand the b…
Viewers will learn about arithmetic and Boolean expressions in Java and the logical operators used to create Boolean expressions. We will cover the symbols used for arithmetic expressions and define each logical operator and how to use them in Boole…
This tutorial will introduce the viewer to VisualVM for the Java platform application. This video explains an example program and covers the Overview, Monitor, and Heap Dump tabs.

856 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question