Problem running servlet using PJA tools

Question

Hi
I am trying to run the TeksSurveyPie servlet from the PJA Package.But everytime i run it says
Internal error: Unexpected error condition thrown (java.lang.NoClassDefFoundError: TeksSurveyPie (wrong name: com/eteks/servlet/TeksSurveyPie),TeksSurveyPie (wrong name: com/eteks/servlet/TeksSurveyPie)), stack: java.lang.NoClassDefFoundError: TeksSurveyPie (wrong name: com/eteks/servlet/TeksSurveyPie)
at java.lang.ClassLoader.defineClass0(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:495)
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:110)
at java.net.URLClassLoader.defineClass(URLClassLoader.java:251)
at java.net.URLClassLoader.access$1(URLClassLoader.java:217)
at java.net.URLClassLoader$1.run(URLClassLoader.java:198)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:192)
at java.lang.ClassLoader.loadClass(ClassLoader.java:300)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:290)
at java.lang.ClassLoader.loadClass(ClassLoader.java:256)
at java.lang.ClassLoader.findSystemClass(ClassLoader.java:629)
at com.iplanet.server.http.servlet.NSServletLoader.findClass(NSServletLoader.java:152)
at com.iplanet.server.http.servlet.NSServletLoader.loadClass(NSServletLoader.java:108)
at com.iplanet.server.http.servlet.NSServletEntity.load(NSServletEntity.java:337)
at com.iplanet.server.http.servlet.NSServletEntity.update(NSServletEntity.java:173)
at com.iplanet.server.http.servlet.NSServletRunner.Service(NSServletRunner.java:427)
I am tryin to access the servlet like this
https://avenger/servlet/TeksSurveyPie?survey=Yes
Pls tell me where i am going wrong...????Its preety urgent ....
thanks
prabhu

Answer 1

the servlet is as below for reference .....
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.ServletException;
import javax.servlet.ServletConfig;
import javax.servlet.UnavailableException;
import java.io.IOException;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.OutputStream;
import java.util.Properties;
import java.util.Vector;
import java.util.Enumeration;
import java.util.Hashtable;
import java.util.StringTokenizer;
import java.awt.Graphics;
import java.awt.Color;
import java.awt.Frame;
import java.awt.AWTError;
import java.awt.Image;
import java.awt.image.FilteredImageSource;
import Acme.JPM.Encoders.GifEncoder;
import com.eteks.filter.Web216ColorsFilter;
import com.eteks.awt.servlet.PJAServlet;
* This servlet manages in a simple way a dynamic survey and returns the pie of the survey.
* It can be called in either ways :
* <UL><LI><code>.../servlet/com.eteks.servlet.TeksSurveyPie?survey=mySurvey&answer=myAnswer</code>
* adds the answer <code>myAnswer</code> to the survey <code>mySurvey</code>,
* and then returns the pie of the current state of <code>mySurvey</code>.
* <LI><code>.../servlet/com.eteks.servlet.TeksSurveyPie?survey=mySurvey</code>
* simply returns the pie of the current state of <code>mySurvey</code>.</UL>
* <P>To be platform independant, the servlet uses <code>com.eteks.awt.servlet.PJAServlet</code> as super class,
* to have at disposal an image into which graphics operation can be performed.<BR>
* <code>com.eteks.awt.PJAServlet</code> class and depending classes of <code>com.eteks.awt</code> packages
* must be in the servlet engine classpath, and at least one .pjaf font file (Pure Java AWT Font) must exist
* in the user directory or in the directory set in the <code>java.awt.fonts</code> system property,
* if JVM version <= 1.1.<BR>
public class TeksSurveyPie extends PJAServlet
Properties surveysParam = new Properties ();
String fontsDir = ""; // Default value for "java.awt.fonts" .pjaf fonts directory initParameter
String surveysFile = fontsDir + File.separator + "survey.txt"; // Default value for survey file initParameter
// Colors used to fill the pie
final Color colors [] = {Color.blue,
Color.green,
Color.red,
Color.cyan,
Color.magenta,
Color.gray,
Color.yellow,
Color.pink,
Color.orange,
Color.white};
final Color penColor = Color.black;
public void initPJA (ServletConfig config) throws ServletException
// Store the ServletConfig object and log the initialization
super.initPJA (config);
// Retrieves surveys file path
String param = getInitParameter ("surveysFile");
if (param != null)
surveysFile = param;
param = getInitParameter ("fontsDir");
if (param != null)
fontsDir = param;
FileInputStream in = null;
try
in = new FileInputStream (surveysFile);
surveysParam.load (in);
catch (IOException e)
{ } // Empty properties
finally
try
if (in != null)
in.close ();
catch (IOException ex)
public void destroyPJA ()
try
surveysParam.save (new FileOutputStream (surveysFile), "Survey file");
catch (IOException e)
{ } // Properties can't be saved
public String getFontsPath ()
return super.getFontsPath () + File.pathSeparator
+ fontsDir;
public void doPostPJA (HttpServletRequest request,
HttpServletResponse response)
throws ServletException, IOException
doGetPJA (request, response);
public void doGetPJA (HttpServletRequest request,
HttpServletResponse response)
throws ServletException, IOException
String survey = request.getParameter ("survey"); // Survey name
String answer = request.getParameter ("answer"); // Proposed answer
String paramWidth = request.getParameter ("width");
String paramHeight = request.getParameter ("height");
int width = paramWidth == null ? 200 : Integer.parseInt (paramWidth);
int height = paramHeight == null ? 100 : Integer.parseInt (paramHeight);
// v1.1 : Changed code to enable image creation
// even if PJAToolkit couldn't be loaded by Toolkit.getDefaultToolkit ()
Image image = createImage (width, height);
if (survey == null)
survey = "";
if (answer != null)
String key = survey + "_" + answer;
String value = surveysParam.getProperty (key);
if (value != null)
// If the answer already exists, increase its value
surveysParam.put (key, String.valueOf (Integer.parseInt (value) + 1));
else
String surveyAnswers = surveysParam.getProperty (survey);
// Add this answer to the other ones
if (surveyAnswers == null)
surveysParam.put (survey, answer);
else
surveysParam.put (survey, surveyAnswers + "," + answer);
surveysParam.put (key, "1");
Hashtable answers = new Hashtable ();
Vector sortedAnswers = new Vector ();
synchronized (surveysParam)
String surveyAnswers = surveysParam.getProperty (survey);
if (surveyAnswers != null)
for (StringTokenizer tokens = new StringTokenizer (surveyAnswers, ",");
tokens.hasMoreTokens (); )
String token = tokens.nextToken ();
int answerCount = Integer.parseInt (surveysParam.getProperty (survey + "_" + token));
answers.put (token, new Integer (answerCount));
// Seek the good place to insert this element
int i;
for (i = 0; i < sortedAnswers.size (); i++)
if (answerCount > ((Integer)answers.get (sortedAnswers.elementAt (i))).intValue ())
break;
sortedAnswers.insertElementAt (token, i);
// Compute the pies of the survey
drawSurveyPies (image, answers, sortedAnswers, width, height);
// Send generated image
sendGIFImage (image, response);
* Generates a GIF image on the response stream from image.
public void sendGIFImage (Image image, HttpServletResponse response) throws ServletException, IOException
// Set content type and other response header fields first
response.setContentType("image/gif");
// Then write the data of the response
OutputStream out = response.getOutputStream ();
try
new GifEncoder (image, out).encode ();
catch (IOException e)
// GifEncoder may throw an IOException because "too many colors for a GIF" (> 256)
// were found in the image
// Reduce the number of colors in that case with Web216ColorsFilter basic filter
new GifEncoder (new FilteredImageSource (image.getSource (),
new Web216ColorsFilter ()),
out).encode ();
out.flush ();
private void drawSurveyPies (Image image,
Hashtable answers,
Vector sortedAnswers,
int width,
int height)
Graphics gc = image.getGraphics ();
// Draw a shadow
gc.setColor (penColor);
gc.fillOval (1, 1, height - 3, height - 3);
gc.fillOval (2, 2, height - 3, height - 3);
// Compute the sum of all values
int sum = 0;
for (Enumeration e = answers.elements ();
e.hasMoreElements (); )
sum += ((Integer)e.nextElement ()).intValue ();
for (int accum = 0, i = 0, deltaY = 0; i < sortedAnswers.size (); i++, deltaY += 15)
int answerValue = ((Integer)answers.get (sortedAnswers.elementAt (i))).intValue ();
int startAngle = accum * 360 / sum;
int angle = answerValue * 360 / sum;
// Fill the anwser pie
gc.setColor (colors [i % colors.length]);
gc.fillArc (0, 0, height - 3, height - 3, startAngle, angle);
// Draw a separating line
gc.setColor (penColor);
gc.drawLine ((height - 3) / 2, (height - 3) / 2,
(int)((height - 3) / 2. * (1 + Math.cos (startAngle / 180. * Math.PI)) + 0.5),
(int)((height - 3) / 2. * (1 - Math.sin (startAngle / 180. * Math.PI)) + 0.5));
accum += answerValue;
if (deltaY + 15 < height)
// Add a comment
gc.setColor (colors [i % colors.length]);
gc.fillRect (height + 6, deltaY + 1, 13, 10);
gc.setColor (penColor);
gc.drawRect (height + 5, deltaY, 14, 11);
// Draw is done with default font
gc.drawString (String.valueOf (100 * answerValue / sum) + "% " + (String)sortedAnswers.elementAt (i),
height + 22, deltaY + 9);
gc.drawLine ((height - 3) / 2, (height - 3) / 2, height - 3, (height - 3) / 2);
// Draw a surrounding oval
gc.drawOval (0, 0, height - 3, height - 3);
Thx
prabhu