All about alex antony

Change the Tick Label Value of X Axis in Java FX

Sounds Great !.I Will try that and get to you back in case i hang still

13 years ago

Change the Tick Label Value of X Axis in Java FX

Thanks for the reply.

The Thing is The Tick Values for Y Axis will remain Constant but for the X-Axis it will change as the thread runs.

Thats why i dint override the formatticklabel method in the normal way that i did for y axis.

The Function addvalue is called by the thread each second and the actual value of the graph is updated through this function data.xVValue=data.XValue-1 ;So I would need a method that i call which can update the xAxis tick label value

I Tried this inside the for loop xAxis.formatTickLabel function (value) {} but doesnt seem to work

Any Suggestions !

13 years ago

JavaFX

Change the Tick Label Value of X Axis in Java FX

Hi all,

I have tried out some samples with Java FX and it is exciting.I have been trying to generate a dynamic Graph using JavaFX .It Worked out Well and i was able to see the Graph Moving .But as the Graph Moves i Would also like to see my x-axis labels moving.But i dont know how to do it .

I am posting my code here.

/*
* To change this template, choose Tools | Templates
* and open the template in the editor.
*/
package labs313674;
import javafx.stage.Stage;
import java.util.Random;
import java.util.Timer;
import java.util.TimerTask;
import javafx.scene.Scene;
import javafx.scene.paint.Color;
import javafx.scene.layout.HBox;
import javafx.scene.layout.VBox;
/**
* @author empqsue
*/
var randomGraph : AnimatedLineChart = AnimatedLineChart {
title: "SGSN-AIRTEL FUN"
//lineName: "PDP-CONTEXT "
xMaxValue:50
yMaxValue:150;
}
var randomGraph1 : AnimatedLineChart = AnimatedLineChart {
title: "SGSN-AIRTEL GPRS"
//lineName: "PDP-CONTEXT "
xMaxValue:50
yMaxValue:150;
}
var randomGraph2 : AnimatedLineChart = AnimatedLineChart {
title: "SGSN-DP ACCESS"
//lineName: "PDP-CONTEXT "
xMaxValue:50
yMaxValue:150;
}
class LineChartDataTask extends TimerTask {
def rand: Random = new Random(new java.util.Date().getTime());
def base: Number = 150 / 2;
override function run() {
var b: Boolean = rand.nextBoolean();
var r: Number;
if (b) {
r = base + rand.nextInt(25);
} else {
r = base - rand.nextInt(25);
}
randomGraph.addValue(r);
randomGraph1.addValue(r);
randomGraph2.addValue(r);
}
};
def timer: Timer = new Timer("TimerThread");
def task: LineChartDataTask = new LineChartDataTask();
timer.schedule(task, 0, 1000);
Stage {
title: "Airtel SGSN Real-Time Monitoring"
scene: Scene {
width: 300
height: 400
fill: Color.YELLOW
content : [
VBox {
content: [
HBox {
content: [
randomGraph ,randomGraph1,randomGraph2
]
}
]
}
]
}
}

/*
* To change this template, choose Tools | TemplSwingRadioButton {
text: "RadioButton"
}
ates
* and open the template in the editor.
*/
package labs313674;
import javafx.scene.CustomNode;
import javafx.scene.chart.LineChart;
import javafx.scene.chart.part.Side;
import javafx.scene.chart.part.NumberAxis;
import javafx.scene.chart.*;
import javafx.scene.chart.part.*;
import javafx.scene.paint.Color;
import javafx.scene.control.Label;
/**
* @author empqsue
*/
public class AnimatedLineChart extends CustomNode {
public var title : String;
public var lineName : String;
public var xMaxValue : Integer;
public var yMaxValue : Integer;
var values : LineChart.Data[];
init {
insert LineChart {
showSymbols: false;
title: bind title
legendSide: Side.RIGHT
//legendVisible: true
xAxis: NumberAxis {
label: "Time (sec.)"
lowerBound: 0
upperBound: bind xMaxValue
minorTickVisible: true
tickUnit: 5
minorTickCount: 5
tickLabelsVisible: true
}
yAxis: NumberAxis {
lowerBound: 0
upperBound: bind yMaxValue
formatTickLabel: function(value) { "{%.0f value}" }
}
data: [
LineChart.Series {
name: bind lineName
data: bind values
fill: Color.RED
}
]
} into children;
}
public function addValue(v:Integer) {
var arraySize : Integer = sizeof values;
//when the line reached the right border of the graph
if (arraySize >= xMaxValue) {
//delete the first (left most) element in the graph
delete values[0];
//and shift all values left
for (data in values) {
data.xValue = data.xValue - 1;
}
}
insert LineChart.Data { xValue:arraySize , yValue: v } into values;
}
}

These are the two classes that i am using main.fx and AnimatedLineChart.fx In the Main .fx i have created a timer thread for one second and it calls the AnimatedLineChart.fx and deletes the rightmost value and adds the new Value to the left hand side which creates a moving impression.But the concern is the X-Axis Labels dont change.How to do that

Any Help is highly Appreciated

13 years ago

JavaFX

JNLP applet to servlet communication problems -Directory Structure

that error is resolved....i modified the web.xml file like this

Now the applet is launching fine but only the frame...The applet is still not communicating with the servlet .

if i give hard coded values it is running fine ..but i am not able to fetch values from the database.

13 years ago

JNLP and Web Start

JNLP applet to servlet communication problems -Directory Structure

Yes i am downloading the jar file from a web server.My server is configured to run servlets.

as far as i read from the articles the applet seeks the help of servlet to communicate with the database.i tried directly connecting to the database but it dint work.But i was able to get the database values if i put a servlet in between..

The reason i am confused is why this doesnt work if i use jnlp to launch it ...I suppose there might be something to do with the jar files but i am not sure .....

I have some jnlp development guides but there are no prior information on how to use servlets within JNLP.

What else approach i can do to make my client JNLP communicate with my server and fetch the db values.

13 years ago

JNLP and Web Start

JNLP applet to servlet communication problems -Directory Structure

Thanks for the reply.

I have tested launching the applet through jnlp and it works fine.

I have also tested the applet-servlet communication through http which works fine but in that case i have embedded that applet s class file in the html page .

Now where i am lacking is how to include the servlet in the jar file so that the applet that is launched through JNLP communicates with the servlet.

i read some articles and came to know about the jnlp-servlet.jar file and i have included that in the lib of my WEB-INF.

I have tried things but now i am struck up at this point

I have compiled all the classes and jar file looks like this

META-INF/MANIFEST.MF
META-INF/MYSELF7.SF
META-INF/MYSELF7.DSA
META-INF/
com/
com/alex/
com/alex/MenuDemo$MyTableCellRender.class
com/alex/PopupManager$1.class
com/alex/MenuDemo.class
com/alex/MenuDemo$HttpMessage.class
com/alex/MenuDemo$1.class
com/alex/PopupManager.class
com/alex/MenuDemo$2.class
WEB-INF/
WEB-INF/web.xml
WEB-INF/lib/
WEB-INF/lib/jnlp-servlet.jar
WEB-INF/classes/
WEB-INF/classes/DaytimeServlet.java~
WEB-INF/classes/DaytimeServlet.java
WEB-INF/classes/DaytimeServlet.class

my jnlp file is this

<?xml version="1.0" encoding="utf-8"?>
<jnlp spec="1.0+" codebase="http://150.236.9.70:8080/june/" href="alertsys.jnlp">
<information>
<title>Smart Alert Management System</title>
<vendor>ericsson india global Services</vendor>
<homepage href="http://150.236.9.70:8080/june/"/>
<description>Smart Alert Management System</description>
<description kind="short">IN Service Level Monitoring</description>
<offline-allowed />
</information>
<security>
<all-permissions/>
</security>
<resources>
<j2se version="1.6+"/>
<![CDATA[
<jar href="alert.jar" />
]]>
</resources>
<application-desc main-class="com.alex.MenuDemo"/>
</jnlp>

But i am getting this error

JNLParseException[ Could not parse launch file. Error at line 0.]
at com.sun.javaws.jnl.XMLFormat.parse(Unknown Source)
at com.sun.javaws.jnl.LaunchDescFactory.buildDescriptor(Unknown Source)
at com.sun.javaws.jnl.LaunchDescFactory.buildDescriptor(Unknown Source)
at com.sun.javaws.Main.launchApp(Unknown Source)
at com.sun.javaws.Main.continueInSecureThread(Unknown Source)
at com.sun.javaws.Main$1.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
Failed to find the '<' charater that marks the end of a CDATA element. Exception parsing xml at line 0
at com.sun.deploy.xml.XMLParser.skipPCData(Unknown Source)
at com.sun.deploy.xml.XMLParser.nextToken(Unknown Source)
at com.sun.deploy.xml.XMLParser.parse(Unknown Source)
at com.sun.javaws.jnl.XMLFormat.parse(Unknown Source)
at com.sun.javaws.jnl.LaunchDescFactory.buildDescriptor(Unknown Source)
at com.sun.javaws.jnl.LaunchDescFactory.buildDescriptor(Unknown Source)
at com.sun.javaws.Main.launchApp(Unknown Source)
at com.sun.javaws.Main.continueInSecureThread(Unknown Source)
at com.sun.javaws.Main$1.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)

Any ideas why this error occurs !

WOuld be really greatful for your help or ideas regards this

13 years ago

JNLP and Web Start

Could not parse launch file. Error at line 0

Hi all

While i am running the JNLP application i am getting this error.I am getting the following in the exception and in the wrapped exception.

here is my jnlp file

Please help me

13 years ago

JNLP and Web Start

Applet -Servlet connection in JNLP

Hi all,

I am seeking your help in my assignment.

I am launching an applet through JNLP.

The directory Structure i am following is like this

src/com/alex/MenuDemo.java
bin/com/alex/MenuDemo.class

The main code is here

package com.alex;
import java.awt.*;
import java.awt.event.*;
import java.awt.GridLayout;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import javax.swing.JMenu;
import javax.swing.JMenuItem;
import javax.swing.JCheckBoxMenuItem;
import javax.swing.JRadioButtonMenuItem;
import javax.swing.ButtonGroup;
import javax.swing.JMenuBar;
import javax.swing.KeyStroke;
import javax.swing.ImageIcon;
import javax.swing.JPanel;
import javax.swing.JTextArea;
import javax.swing.JScrollPane;
import javax.swing.JFrame;
import javax.swing.table.*;
import javax.swing.*;
import javax.swing.JTable;
import java.awt.Dimension;
import java.util.StringTokenizer;
import java.net.*;
import javax.jnlp.*;
import java.io.*;
import java.util.*;
import java.net.URL;
public class MenuDemo implements ActionListener, ItemListener {
JTextArea output;
JScrollPane scrollPane;
String newline = "\n";
static BasicService basicService = null;
private boolean DEBUG = false;
public JMenuBar createMenuBar() {
JMenuBar menuBar;
JMenu menu, submenu;
JMenuItem menuItem;
JRadioButtonMenuItem rbMenuItem;
JCheckBoxMenuItem cbMenuItem;
//Create the menu bar.
menuBar = new JMenuBar();
//Build the first menu.
menu = new JMenu("File");
menu.setMnemonic(KeyEvent.VK_A);
menu.getAccessibleContext().setAccessibleDescription(
"The only menu in this program that has menu items");
menuBar.add(menu);
//a group of JMenuItems
menuItem = new JMenuItem("Related Commands",
KeyEvent.VK_T);
//menuItem.setMnemonic(KeyEvent.VK_T); //used constructor instead
menuItem.setAccelerator(KeyStroke.getKeyStroke(
KeyEvent.VK_1, ActionEvent.ALT_MASK));
menuItem.getAccessibleContext().setAccessibleDescription(
"This doesn't really do anything");
menuItem.addActionListener(this);
menu.add(menuItem);
menuItem = new JMenuItem("Ticket Commands");
menuItem.setMnemonic(KeyEvent.VK_D);
menuItem.addActionListener(this);
menu.add(menuItem);
//a group of radio button menu items
menu.addSeparator();
ButtonGroup group = new ButtonGroup();
rbMenuItem = new JRadioButtonMenuItem("Acknowledged Action");
rbMenuItem.setSelected(true);
rbMenuItem.setMnemonic(KeyEvent.VK_R);
group.add(rbMenuItem);
rbMenuItem.addActionListener(this);
menu.add(rbMenuItem);
rbMenuItem = new JRadioButtonMenuItem("Deacknowledge");
rbMenuItem.setMnemonic(KeyEvent.VK_O);
group.add(rbMenuItem);
rbMenuItem.addActionListener(this);
menu.add(rbMenuItem);
//a group of check box menu items
menu.addSeparator();
cbMenuItem = new JCheckBoxMenuItem("Online Advisor");
cbMenuItem.setMnemonic(KeyEvent.VK_C);
cbMenuItem.addItemListener(this);
menu.add(cbMenuItem);
cbMenuItem = new JCheckBoxMenuItem("Show Child Events");
cbMenuItem.setMnemonic(KeyEvent.VK_H);
cbMenuItem.addItemListener(this);
menu.add(cbMenuItem);
//a submenu
menu.addSeparator();
submenu = new JMenu("Filter");
submenu.setMnemonic(KeyEvent.VK_S);
menuItem = new JMenuItem("By Region");
menuItem.setAccelerator(KeyStroke.getKeyStroke(
KeyEvent.VK_2, ActionEvent.ALT_MASK));
menuItem.addActionListener(this);
submenu.add(menuItem);
menuItem = new JMenuItem("By Node");
menuItem.addActionListener(this);
submenu.add(menuItem);
menu.add(submenu);
//Build second menu in the menu bar.
menu = new JMenu("Edit");
menu.setMnemonic(KeyEvent.VK_N);
menuBar.add(menu);
menu = new JMenu("View");
menu.setMnemonic(KeyEvent.VK_N);
menuBar.add(menu);
menu = new JMenu("Alerts");
menu.setMnemonic(KeyEvent.VK_N);
menuBar.add(menu);
menu = new JMenu("Tools");
menu.setMnemonic(KeyEvent.VK_N);
menuBar.add(menu);
menu = new JMenu("Help");
menu.setMnemonic(KeyEvent.VK_N);
menuBar.add(menu);
return menuBar;
}
public Container createContentPane(){
//Create the content-pane-to-be.
JPanel contentPane = new JPanel(new BorderLayout());
contentPane.setOpaque(true);
//Create a scrolled text area.
String[] columnNames = {"Ticket Number","Node","NodeType","Region","Alert","Date","Severity"};
Object data[][] =new Object [10][7];
String h=httptext();
StringTokenizer st=new StringTokenizer(h,"%");
int p=0;
while(st.hasMoreTokens())
{
String hello=st.nextToken();
StringTokenizer st1=new StringTokenizer(hello,"@");
int q=0;
while(st1.hasMoreTokens())
{
if(q==6)
{
data[p][q]=Integer.parseInt(st1.nextToken());
}
else
{
data[p][q]=st1.nextToken();
}
q++;
}
p++;
}
DefaultTableModel myModel = new DefaultTableModel(data, columnNames);
final JTable table = new JTable(myModel);
table.setDefaultRenderer(Object.class, new MyTableCellRender());
table.setPreferredScrollableViewportSize(new Dimension(500, 70));
table.setFillsViewportHeight(true);
table.setCellSelectionEnabled(true);
//table.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
new PopupManager(table);
//Add the text area to the content pane.
contentPane.add(table, BorderLayout.CENTER);
scrollPane = new JScrollPane(table);
contentPane.add(scrollPane, BorderLayout.CENTER);
return contentPane;
}
private String httptext() {
try {
// Construct a URL referring to the servlet
URL url = new URL("/opt/Abhishek/software/tomcat/webapps/innovation/DaytimeServlet");
// Create a com.oreilly.servlet.HttpMessage to communicate with that URL
HttpMessage msg = new HttpMessage(url);
// Send a GET message to the servlet, with no query string
// Get the response as an InputStream
InputStream in = msg.sendGetMessage();
// Wrap the InputStream with a DataInputStream
DataInputStream result =
new DataInputStream(new BufferedInputStream(in));
// Read the first line of the response, which should be
// a string representation of the current time
String date = result.readLine();
// Close the InputStream
in.close();
// Return the retrieved time
return date;
}
catch (Exception e) {
// If there was a problem, print to System.out
// (typically the Java console) and return null
e.printStackTrace();
return null;
}
}
private AbstractTableModel getModel() {
return new AbstractTableModel() {
public int getColumnCount() { return 3; }
public int getRowCount() { return 4;}
public Object getValueAt(int row, int col) {
return String.valueOf(row) + col;
}
};
}
class MyTableCellRender extends DefaultTableCellRenderer
{
public MyTableCellRender()
{
super();
setOpaque(true);
}
public Component getTableCellRendererComponent(JTable table, Object value,
boolean isSelected, boolean hasFocus, int row, int column)
{
if(table.getValueAt(row, 6).equals(1))
{
setForeground(Color.black);
setBackground(Color.red);
}
else if(table.getValueAt(row, 6).equals(2))
{
setBackground(Color.yellow);
setForeground(Color.black);
}
else
{
setBackground(Color.green);
setForeground(Color.black);
}
setText(value !=null ? value.toString() : "");
return this;
}
}
private void printDebugData(JTable table) {
int numRows = table.getRowCount();
int numCols = table.getColumnCount();
javax.swing.table.TableModel model = table.getModel();
System.out.println("Value of data: ");
for (int i=0; i < numRows; i++) {
System.out.print(" row " + i + ":");
for (int j=0; j < numCols; j++) {
System.out.print(" " + model.getValueAt(i, j));
}
System.out.println();
}
System.out.println("--------------------------");
}
public void actionPerformed(ActionEvent e) {
JMenuItem source = (JMenuItem)(e.getSource());
String s = "Action event detected."
+ newline
+ " Event source: " + source.getText()
+ " (an instance of " + getClassName(source) + ")";
output.append(s + newline);
output.setCaretPosition(output.getDocument().getLength());
}
public void itemStateChanged(ItemEvent e) {
JMenuItem source = (JMenuItem)(e.getSource());
String s = "Item event detected."
+ newline
+ " Event source: " + source.getText()
+ " (an instance of " + getClassName(source) + ")"
+ newline
+ " New state: "
+ ((e.getStateChange() == ItemEvent.SELECTED) ?
"selected":"unselected");
output.append(s + newline);
output.setCaretPosition(output.getDocument().getLength());
}
// Returns just the class name -- no package info.
protected String getClassName(Object o) {
String classString = o.getClass().getName();
int dotIndex = classString.lastIndexOf(".");
return classString.substring(dotIndex+1);
}
/** Returns an ImageIcon, or null if the path was invalid. */
protected static ImageIcon createImageIcon(String path) {
java.net.URL imgURL = MenuDemo.class.getResource(path);
if (imgURL != null) {
return new ImageIcon(imgURL);
} else {
System.err.println("Couldn't find file: " + path);
return null;
}
}
/**
* Create the GUI and show it. For thread safety,
* this method should be invoked from the
* event-dispatching thread.
*/
private static void createAndShowGUI() {
//Create and set up the window.
JFrame frame = new JFrame("Ericsson Smart Alert Management System");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
//Create and set up the content pane.
MenuDemo demo = new MenuDemo();
frame.setJMenuBar(demo.createMenuBar());
frame.setContentPane(demo.createContentPane());
//Display the window.
frame.setSize(450, 260);
frame.setVisible(true);
}
public static void main(String[] args) {
try {
basicService = (BasicService)
ServiceManager.lookup("javax.jnlp.BasicService");
} catch (UnavailableServiceException e) {
System.err.println("Lookup failed: " + e);
}
javax.swing.SwingUtilities.invokeLater(new Runnable() {
public void run() {
createAndShowGUI();
}
});
}
class HttpMessage {
URL servlet = null;
String args = null;
public HttpMessage(URL servlet) {
this.servlet = servlet;
}
// Performs a GET request to the previously given servlet
// with no query string.
public InputStream sendGetMessage() throws IOException {
return sendGetMessage(null);
}
// Performs a GET request to the previously given servlet.
// Builds a query string from the supplied Properties list.
public InputStream sendGetMessage(Properties args) throws IOException {
String argString = ""; // default
if (args != null) {
argString = "?" + toEncodedString(args);
}
URL url = new URL(servlet.toExternalForm() + argString);
// Turn off caching
URLConnection con = url.openConnection();
con.setUseCaches(false);
return con.getInputStream();
}
// Performs a POST request to the previously given servlet
// with no query string.
public InputStream sendPostMessage() throws IOException {
return sendPostMessage(null);
}
// Performs a POST request to the previously given servlet.
// Builds post data from the supplied Properties list.
public InputStream sendPostMessage(Properties args) throws IOException {
String argString = ""; // default
if (args != null) {
argString = toEncodedString(args); // notice no "?"
}
URLConnection con = servlet.openConnection();
// Prepare for both input and output
con.setDoInput(true);
con.setDoOutput(true);
// Turn off caching
con.setUseCaches(false);
// Work around a Netscape bug
con.setRequestProperty("Content-Type","application/x-www-form-urlencoded");
// Write the arguments as post data
DataOutputStream out = new DataOutputStream(con.getOutputStream());
out.writeBytes(argString);
out.flush();
out.close();
return con.getInputStream();
}
// Converts a Properties list to a URL-encoded query string
private String toEncodedString(Properties args) {
StringBuffer buf = new StringBuffer();
Enumeration names = args.propertyNames();
while (names.hasMoreElements()) {
String name = (String) names.nextElement();
String value = args.getProperty(name);
buf.append(URLEncoder.encode(name) + "=" + URLEncoder.encode(value));
if (names.hasMoreElements()) buf.append("&");
}
return buf.toString();
}
}
}
class PopupManager extends MouseAdapter implements ActionListener {
JTable table;
JPopupMenu popupMenu;
JDialog dialog;
public PopupManager(JTable table) {
this.table = table;
this.table.addMouseListener(this);
initPopup();
initDialog();
}
public void actionPerformed(ActionEvent e) {
showDialog();
}
private void showDialog() {
int row = table.getSelectedRow();
int col = table.getSelectedColumn();
Rectangle r = table.getCellRect(row, col, true);
JList list = (JList)dialog.getContentPane().getComponent(0);
DefaultListModel model = (DefaultListModel)list.getModel();
model.removeAllElements();
model.addElement("You selected row " + row);
model.addElement("You selected column " + col);
dialog.pack();
Point p = r.getLocation();
SwingUtilities.convertPointToScreen(p, table);
dialog.setLocation(p.x, p.y+r.height);
dialog.setVisible(true);
}
public void mousePressed(MouseEvent e) {
Point p = e.getPoint();
final int row = table.rowAtPoint(p);
final int col = table.columnAtPoint(p);
int selectedRow = table.getSelectedRow();
int selectedCol = table.getSelectedColumn();
if(dialog.isShowing())
dialog.dispose();
if(popupMenu.isVisible())
popupMenu.setVisible(false);
// Update the current selection for correct popupMenu behavior
// in case a new selection is made with the right mouse button.
if(row != selectedRow || col != selectedCol) {
EventQueue.invokeLater(new Runnable() {
public void run() {
table.changeSelection(row, col, true, false);
}
});
}
// Specify the condition(s) you want for popupMenu display.
// For Example: show popupMenu only for view column index 1.
//if(row != -1 && col == 3) {
if(SwingUtilities.isRightMouseButton(e)) {
Rectangle r = table.getCellRect(row, col, false);
popupMenu.show(table, r.x, r.y+r.height);
} else {
e.consume();
}
//}
}
private void initPopup() {
popupMenu = new JPopupMenu();
JMenu item = new JMenu("Create Ticket");
item.addActionListener(this);
JMenuItem submenu = new JMenuItem("Queue 1");
item.add(submenu);
JMenuItem submenu1 = new JMenuItem("Queue 2");
item.add(submenu1);
JMenuItem submenu2 = new JMenuItem("Queue 3");
item.add(submenu2);
JMenuItem submenu3 = new JMenuItem("Queue 4");
item.add(submenu3);
popupMenu.add(item);
JMenuItem item1 = new JMenuItem("Troubleshoot");
item1.addActionListener(this);
popupMenu.add(item1);
JMenuItem item2 = new JMenuItem("View Statistics");
item2.addActionListener(this);
popupMenu.add(item2);
JMenuItem item3 = new JMenuItem("Acknowledge");
item3.addActionListener(this);
popupMenu.add(item3);
JMenuItem item4 = new JMenuItem("Deacknowledge");
item4.addActionListener(this);
popupMenu.add(item4);
JMenuItem item5 = new JMenuItem("Clear Alarm");
item5.addActionListener(this);
popupMenu.add(item5);
JMenuItem item6 = new JMenuItem("Add Journal");
item6.addActionListener(this);
popupMenu.add(item6);
JMenuItem item7 = new JMenuItem("View Journal");
item7.addActionListener(this);
popupMenu.add(item7);
}
private void initDialog() {
Frame owner = (Frame)table.getTopLevelAncestor();
dialog = new JDialog(owner, "title", false);
JList list = new JList(new DefaultListModel());
dialog.add(list);
}
}

This applet communicates with the servlet DaytimeServlet using the function httptext().The servlet connects to the database and returns back the values for filling the table.

When i am launching the applet via jnlp without the servlet it is launching fine.i.e i have hardcoded the values in the applet code only.But when i am trying to launch the applet with the servlet communication for getting the values from the database i am not able to launch it ..

i am not getting any errors ..i dont see anything

here is my jar file

here is my jnlp file

Anyone please suggest me where i am going wrong.Or please suggest me some atricles or link where i can get the communication going fine ..How to make this JNLP applet-Servlet Communication possible?

13 years ago

JNLP and Web Start

JNLP applet to servlet communication problems -Directory Structure

Hi everyone,

I have a very basic question regarding the directory structure for deploying an applet through JNLP.Let me explain my requirement.

I have an applet inside src/com/alex and the class files are in bin/com/alex directory.I have jar ed the class files in the bin directory and the applet is successfully launched.It works fine.

Now i have to make the applet-servlet communication working where the servlet will communicate with the database and give values to the applet.

I have a function httptext() in the applet class that will communicate with servlet in the WEB-INF/classes directory.the httptext() needs to import another function that would be sonwhere com/alex.httpmessage.

Now how should i place all my class files and how should i jar it to make it complete .

MenuDemo.java (main applet) is in src/com/alex/
MenuDemo.class(main applet class) is in bin/com/alex

The Function HttpMessage () is used by httptext() in the applet class to communicate with the servlet and in the applet class i have import com.alex.HttpMessage

Where should i place this HttpMessage()?

Any Help is highly appreciated !

13 years ago

JNLP and Web Start

java.io.IOException: There is not enough space on the disk JNLP

thanks paul for your advice .

13 years ago

JNLP and Web Start

java.io.IOException: There is not enough space on the disk JNLP

Thanks Paul for your kind reply.

I tried yesterday and got it to work smoothly. I Cleared the cache such that the "no enough space on disk" got cleared.

I was successfully able to launch the applet.

Thank you for your response .

But i want to get cleared off something from you.The Applet gets stored on the local cache when loaded through JNLP and because of that we need to clear the cache to get proper outputs.

When getting this into live production,it is a bit difficult to prompt the users to clear the cache memory.

Is there any better solution for this?

I am newly using this protocol (JNLP) and i wish to get something clarified.

I am desiging an alarm management system for a network .The Server in which i have the application has connectivity to all the nodes that i want to make notification of the alarms when something goes wrong in that node.The Applet that is launced through JNLP will initially contain the alarms fetched from the database.Suppose that i have a new entry in my database(when anything goes wrong in any node it will automatically fill my database) ,is it possible to update the Applet that the client is looking at without actually refreshing the application again.Is this possible through JNLP.

Your suggestions Please !

thanks in advance

13 years ago

JNLP and Web Start

java.io.IOException: There is not enough space on the disk JNLP

In the Exception i am getting
com.sun.deploy.net.FailedDownloadException: Unable to load resource:
http://150.236.9.70:8080/JavaWebStartTest/Test.jnlp
at com.sun.deploy.net.DownloadEngine.actionDownload(Unknown Source)
at com.sun.deploy.net.DownloadEngine.getCacheEntry(Unknown Source)
at com.sun.deploy.net.DownloadEngine.getCacheEntry(Unknown Source)
at com.sun.deploy.net.DownloadEngine.getResourceCacheEntry(Unknown Source)
at com.sun.deploy.net.DownloadEngine.getResourceCacheEntry(Unknown Source)
at com.sun.deploy.net.DownloadEngine.getResource(Unknown Source)
at com.sun.deploy.net.DownloadEngine.getResource(Unknown Source)
at com.sun.javaws.LaunchDownload.getUpdatedLaunchDesc(Unknown Source)
at com.sun.javaws.Launcher.updateFinalLaunchDesc(Unknown Source)
at com.sun.javaws.Launcher.prepareToLaunch(Unknown Source)
at com.sun.javaws.Launcher.prepareToLaunch(Unknown Source)
at com.sun.javaws.Launcher.launch(Unknown Source)
at com.sun.javaws.Main.launchApp(Unknown Source)
at com.sun.javaws.Main.continueInSecureThread(Unknown Source)
at com.sun.javaws.Main$1.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
In the Wrapped Exception i am getting
java.io.IOException: There is not enough space on the disk
at com.sun.deploy.cache.CacheEntry$9.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at com.sun.deploy.cache.CacheEntry.writeFileToDisk(Unknown Source)
at com.sun.deploy.cache.CacheEntry.writeFileToDisk(Unknown Source)
at com.sun.deploy.cache.Cache.downloadResourceToTempFile(Unknown Source)
at com.sun.deploy.cache.Cache.downloadResourceToCache(Unknown Source)
at com.sun.deploy.net.DownloadEngine.actionDownload(Unknown Source)
at com.sun.deploy.net.DownloadEngine.getCacheEntry(Unknown Source)
at com.sun.deploy.net.DownloadEngine.getCacheEntry(Unknown Source)
at com.sun.deploy.net.DownloadEngine.getResourceCacheEntry(Unknown Source)
at com.sun.deploy.net.DownloadEngine.getResourceCacheEntry(Unknown Source)
at com.sun.deploy.net.DownloadEngine.getResource(Unknown Source)
at com.sun.deploy.net.DownloadEngine.getResource(Unknown Source)
at com.sun.javaws.LaunchDownload.getUpdatedLaunchDesc(Unknown Source)
at com.sun.javaws.Launcher.updateFinalLaunchDesc(Unknown Source)
at com.sun.javaws.Launcher.prepareToLaunch(Unknown Source)
at com.sun.javaws.Launcher.prepareToLaunch(Unknown Source)
at com.sun.javaws.Launcher.launch(Unknown Source)
at com.sun.javaws.Main.launchApp(Unknown Source)
at com.sun.javaws.Main.continueInSecureThread(Unknown Source)
at com.sun.javaws.Main$1.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)

Hi all,

I am trying to launch an applet from my linux web server through JNLP.I have did a reading on the JNLP Developers Guide from Oracle and started working on this.

I have packaged my class files into a jar file and have specifically signed the jar file.On opening the applet through JNLP it is giving an exception "There is no enough space on the disk".

I have spent several hours in making this done , but i am unable to do so .

Anybody could help me out in solving this and put me in the right direction.

Any Guidance is highly appreciated.

Thanks in advance

I have posted the error message in the code tags

13 years ago

JNLP and Web Start

alex antony

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