Hi. I'm no expert but I have a few questions/suggestions:
1. What version of GWT are you running. This line -
<script type="text/javascript" language="javascript"
src="com.packtpub.gwtbook1.hellogwt.HelloGWT.nocache.js"></script>
Has been depreciated with 1.6 (i believe) so I dont know if that would
cause a problem. It also looks like you combine some deprecieated
code with new 1.6/7 code. If its an older tutorial it might have a
lot of older code so I'd go through and see if you can update that
first.
2. Double and tripple check your xml config files. Something might
be wrong in there preventing your module from being loaded.
Could you put the entire error message here? Its kinda hard to
determine whats wrong from your post as well.
On Jul 31, 7:05 am, Chaaru <sarath...@gmail.com> wrote:
> Hi friends,
> I am a newbie to GWT.I am in a condition to develop a GWT
> application. So i started my GWT journey by reading a book material
> from PACKT publishers named "Google Web Toolkit Java Ajax
> programming". I set my GWT environment and tested.It works pretty
> well.Then i tried my first example application named as HelloGWT . I
> created an application named as HelloGWT by using the below command
> [color=red]applicationCreator.cmd -out <directory location>\GWTBook
> \HelloGWT com.packtpub.gwtbook.HelloGWT.client.HelloGWT[/color]
> Its created successfully.
> Then i tried example application given in chapter 2 - creating a
> random quote ajax application.I downloaded codes from PACKT publishers
> home site.and placed that codes in corresponding folders as they said
> in book.But its not working well when i run HelloGWT -shell. It shows
> error as
> [color=red]failed to load module
> com.packtpub.gwtbook.hellogwt.HelloGWT
> Unable to load module entry point class
> com.packtpub.gwtbook1.hellogwt.client.HelloGWT (see associated
> exception for details)
> Failure to load module 'com.packtpub.gwtbook1.hellogwt.HelloGWT'[/
> color]
> I given below the codes that i tried with exact folder
> structure.Please tell me where am i doing wrong thing in this one..
> [color=green]HelloGWT\src\com\packtpub\gwtbook1\hellogwt\client
> \HelloGWT.java[/color]
>
> package com.packtpub.gwtbook1.hellogwt.client;
>
> import com.google.gwt.core.client.EntryPoint;
> import com.google.gwt.core.client.GWT;
> import com.google.gwt.user.client.Timer;
> import com.google.gwt.user.client.rpc.AsyncCallback;
> import com.google.gwt.user.client.rpc.ServiceDefTarget;
> import com.google.gwt.user.client.ui.Label;
> import com.google.gwt.user.client.ui.RootPanel;
>
> /**
> * Entry point classes define <code>onModuleLoad()</code>.
> */
> public class HelloGWT implements EntryPoint {
>
> /**
> * This is the entry point method.
> */
> public void onModuleLoad() {
> final Label quoteText = new Label();
> quoteText.setStyleName("quoteLabel");
>
> // create the service
> final RandomQuoteServiceAsync quoteService =
> (RandomQuoteServiceAsync) GWT.create(RandomQuoteService.class);
>
> // Specify the URL at which our service implementation is running.
> ServiceDefTarget endpoint = (ServiceDefTarget) quoteService;
> endpoint.setServiceEntryPoint(GWT.getModuleBaseURL() + "quotes");
>
> Timer timer = new Timer() {
> public void run() {
>
> // create an async callback to handle the result.
> AsyncCallback callback = new AsyncCallback() {
> public void onSuccess(Object result) {
> // display the retrieved quote in the label
> quoteText.setText((String) result);
> }
>
> public void onFailure(Throwable caught) {
> // display the error text if we cant get quote
> quoteText.setText("Failed to get a quote.");
> }
> };
>
> // Make the call.
> quoteService.getQuote(callback);
> }
> };
>
> // Schedule the timer to run once every second
> timer.scheduleRepeating(1000);
>
> RootPanel.get("slot1").add(quoteText);
> }
>
> }
>
> [color=green]HelloGWT\src\com\packtpub\gwtbook1\hellogwt\client
> \RandomQuoteService.java[/color]
>
> package com.packtpub.gwtbook1.hellogwt.client;
>
> import com.google.gwt.user.client.rpc.RemoteService;
>
> public interface RandomQuoteService extends RemoteService {
> public String getQuote();
>
> }
>
> [color=green]HelloGWT\src\com\packtpub\gwtbook1\hellogwt\client
> \RandomQuoteServiceAsync.java[/color]
>
> package com.packtpub.gwtbook1.hellogwt.client;
>
> import com.google.gwt.user.client.rpc.AsyncCallback;
>
> public interface RandomQuoteServiceAsync {
> public void getQuote(AsyncCallback callback);
>
> }
>
> [color=green]HelloGWT\src\com\packtpub\gwtbook1\hellogwt\server
> \RandomQuoteServiceImpl.java[/color]
>
> package com.packtpub.gwtbook1.hellogwt.server;
>
> import java.util.ArrayList;
> import java.util.List;
> import java.util.Random;
>
> import com.google.gwt.user.server.rpc.RemoteServiceServlet;
> import com.packtpub.gwtbook1.hellogwt.client.RandomQuoteService;
>
> public class RandomQuoteServiceImpl extends RemoteServiceServlet
> implements
> RandomQuoteService {
> private Random randomizer = new Random();
>
> private static final long serialVersionUID = -1502084255979334403L;
>
> private static List quotes = new ArrayList();
>
> static {
> quotes.add("No great thing is created suddenly — Epictetus");
> quotes.add("Well done is better than well said — Benjamin
> Franklin");
> quotes.add("No wind favors he who has no destined port —
> Montaigne");
> quotes.add("Sometimes even to live is an act of courage —
> Seneca");
> quotes.add("Know thyself — Socrates");
> }
>
> public String getQuote() {
> return (String) quotes.get(randomizer.nextInt(4));
> }
>
> }
>
> [color=green]HelloGWT\src\com\packtpub\gwtbook1\hellogwt\public
> \HelloGWT.html[/color]
>
> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
> <!-- The HTML 4.01 Transitional DOCTYPE declaration-->
> <!-- above set at the top of the file will set -->
> <!-- the browser's rendering engine into -->
> <!-- "Quirks Mode". Replacing this declaration -->
> <!-- with a "Standards Mode" doctype is supported, -->
> <!-- but may lead to some differences in layout. -->
>
> <html>
> <head>
> <meta http-equiv="content-type" content="text/html;
> charset=UTF-8">
> <!-- -->
> <!-- Any title is fine -->
> <!-- -->
> <title>HelloGWT</title>
>
> <!-- -->
> <!-- This script loads your compiled module. -->
> <!-- If you add any GWT meta tags, they must -->
> <!-- be added before this line. -->
> <!-- -->
> <script type="text/javascript" language="javascript"
> src="com.packtpub.gwtbook1.hellogwt.HelloGWT.nocache.js"></script>
> </head>
>
> <!-- -->
> <!-- The body can have arbitrary html, or -->
> <!-- you can leave the body empty if you want -->
> <!-- to create a completely dynamic UI. -->
> <!-- -->
> <body>
>
> <!-- OPTIONAL: include this if you want history support -->
> <iframe src="javascript:''" id="__gwt_historyFrame" tabIndex='-1'
> style="position:absolute;width:0;height:0;border:0"></iframe>
>
> </body>
> </html>
>
> [color=green]HelloGWT\src\com\packtpub\gwtbook1\hellogwt\public
> \HelloGWT.css[/color]
>
> /** Add css rules here for your application. */
>
> /** Example rules used by the template application (remove for your
> app) */
> .pc-template-btn {
> display: block;
> font-size: 16pt
>
> }
>
> #pc-template-img {
> margin-top: 20px;
>
> }
>
> [color=green]HelloGWT\src\com\packtpub\gwtbook1\hellogwt
> \HelloGWT.gwt.xml[/color]
>
> <module>
>
> <!-- Inherit the core Web Toolkit stuff.
> -->
> <inherits name='com.google.gwt.user.User'/>
>
> <!-- Inherit the default GWT style sheet. You can change
> -->
> <!-- the theme of your GWT application by uncommenting
> -->
> <!-- any one of the following lines.
> -->
> <inherits name='com.google.gwt.user.theme.standard.Standard'/>
> <!-- <inherits name='com.google.gwt.user.theme.chrome.Chrome'/>
> -->
> <!-- <inherits name='com.google.gwt.user.theme.dark.Dark'/>
> -->
>
> <!-- Other module inherits
> -->
>
> <!-- Specify the app entry point class.
> -->
> <entry-point
> class='com.packtpub.gwtbook1.hellogwt.client.HelloGWT'/>
> <servlet path="/"
> class="com.packtpub.gwtbook1.hellowgwt.server.RandomQuoteServiceImpl" /
>
> <!-- Specify the application specific style sheet.
> -->
> <stylesheet src='HelloGWT.css' />
>
> </module>
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