Created a plugin, works in developer but not in smart clien

Questions
1

Hi,
I created a plugin for the first time, so I probably am missing something obvious.
It’s a very simple plugin which returns a QR code and it works great in developer version 8.1.4.
When I try it on my live server (also 8.1.4) and start a smart client I get the following error:

SEVERE: Error occured loading client plugin class com.fkplugins.QRcode.QRcode
java.lang.ClassNotFoundException: com.fkplugins.QRcode.QRcode
	at java.net.URLClassLoader.findClass(Unknown Source)
	at com.sun.jnlp.JNLPClassLoader.findClass(Unknown Source)
	at java.lang.ClassLoader.loadClass(Unknown Source)
	at com.sun.jnlp.JNLPClassLoader.loadClass(Unknown Source)
	at java.lang.ClassLoader.loadClass(Unknown Source)
	at java.lang.Class.forName0(Native Method)
	at java.lang.Class.forName(Unknown Source)
	at com.servoy.j2db.plugins.PluginManager.loadClientPlugins(PluginManager.java:409)
	at com.servoy.j2db.plugins.PluginManager.initClientPlugins(PluginManager.java:359)
	at com.servoy.j2db.smart.J2DBClient$13.run(J2DBClient.java:1173)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
	at java.lang.Thread.run(Unknown Source)

I have two class files in my package “com.fkplugins.QRcode”, QRcode.java and QRcodeProvider.java

This is the code in the file “QRcode.java”

package com.fkplugins.QRcode;

import java.beans.PropertyChangeEvent;
import java.net.URL;
import java.util.Properties;

import javax.swing.Icon;
import javax.swing.ImageIcon;

import com.servoy.j2db.plugins.IClientPlugin;
import com.servoy.j2db.plugins.IClientPluginAccess;
import com.servoy.j2db.plugins.PluginException;
import com.servoy.j2db.scripting.IScriptable;

public class QRcode implements IClientPlugin{

	
	
	@Override
	public Properties getProperties() {
		Properties props = new Properties();
		props.put(DISPLAY_NAME, getName());
		return props;
	}

	@Override
	public void load() throws PluginException {
		// TODO Auto-generated method stub
		
	}

	@Override
	public void unload() throws PluginException {
		//provider = null;
	}

	@Override
	public void propertyChange(PropertyChangeEvent evt) {
		// TODO Auto-generated method stub
		
	}

	@Override
	public IScriptable getScriptObject() {
		
		return QRcodeProvider.getInstance();
	}

	@Override
	public Icon getImage() {
		URL iconUrl = getClass().getResource("logo.png");
		if (iconUrl != null) {
			return new ImageIcon(iconUrl);
		} else {
			return null;
		}
	}

	@Override
	public String getName() {
		// TODO Auto-generated method stub
		return "QRcode";
	}

	@Override
	public void initialize(IClientPluginAccess arg0) throws PluginException {
		// TODO Auto-generated method stub
		
	}

}

And the code in “QRcodeProvider.java”

package com.fkplugins.QRcode;

import com.servoy.j2db.documentation.ServoyDocumented;
import com.servoy.j2db.scripting.IReturnedTypesProvider;
import com.servoy.j2db.scripting.IScriptable;
import javax.imageio.ImageIO;
import com.google.zxing.BarcodeFormat;
import com.google.zxing.common.BitMatrix;
import com.google.zxing.qrcode.QRCodeWriter;
import com.google.zxing.client.j2se.MatrixToImageConfig;
import com.google.zxing.client.j2se.MatrixToImageWriter;

import org.mozilla.javascript.annotations.JSFunction;

import java.awt.image.BufferedImage;
import java.io.ByteArrayOutputStream;
import java.io.IOException;



@ServoyDocumented(publicName = QRcode.DISPLAY_NAME, scriptingName = "QR code plugin")
public class QRcodeProvider implements IScriptable, IReturnedTypesProvider {

	@Override
    public Class<?>[] getAllReturnedTypes() {
        return new Class[]{QRcodeProvider.class};
    }

    
    private static final QRcodeProvider instance = new QRcodeProvider();
    
    
    
    @JSFunction
    public static QRcodeProvider getInstance() {
        return instance;
    }

   
    
    /**
     * Generate a QR code byte array with your text and color as parameter
     *
     * @sample
     * var result = plugins.QRcode.generateQRCode('servoy.com');
     *
     * @param barcodeText
     * @param color
     * @return
     */
    @JSFunction
    public byte[] generateQRCode(String barcodeText, String color) {
    	try {
	    	QRCodeWriter barcodeWriter = new QRCodeWriter();
	        BitMatrix bitMatrix = null;
        	bitMatrix = barcodeWriter.encode(barcodeText, BarcodeFormat.QR_CODE, 200, 200);
	        MatrixToImageConfig conf = new MatrixToImageConfig(-16736285,-1);
	        BufferedImage image = MatrixToImageWriter.toBufferedImage(bitMatrix, conf);
	        ByteArrayOutputStream baos = new ByteArrayOutputStream();
	        try {
				ImageIO.write(image, "jpg", baos);
			} catch (IOException e1) {
				// TODO Auto-generated catch block
			}
	        byte[] bytes = baos.toByteArray();
	        return bytes;
        }catch(Exception e) {
        	return null;
        }
    }
}

I am currently at a loss at what is going wrong here, I hope anyone here can help me out.

2

Did you add the jars for your com.google.zxing classes and any dependencies that these classes or yours might use?
Did you create a jnlp for Smart client to know to load these jars?

3

Ah yes, I forgot to add this line :P

<jar href="/plugins/QRcode.jar" download="%%loadmethod%%" version="%%version%%"/>

It now works, thanks!