what's wrong here?

[Alex Luya]

No exception,no output,that is strange
-
package com.tsolution.crm.client;

public class Model
{
   private String desc;
  
public String getDesc()
{
return desc;
}
public void setDesc(String desc)
{
this.desc = desc;
}

}

-
.
public void onModuleLoad()
{
Model m1 = new Model();
m1.setDesc("Hello");
  
AsyncCallback callback=new AsyncCallback(){
public void onFailure(Throwable caught)
{
}

public void onSuccess(String result)
{
Window.alert(result);
}
};
   
ArrayList modelList=new ArrayList();
modelList.add(m1);
  
loginService.greetServer(modelList, callback);
}


--
package com.tsolution.crm.client;

import java.util.ArrayList;
import com.google.gwt.user.client.rpc.RemoteService;
import com.google.gwt.user.client.rpc.RemoteServiceRelativePath;


@RemoteServiceRelativePath("greet")
public interface GreetingService extends RemoteService {
  String greetServer(ArrayList modelList);
  String greetServer1(String modelList);
}
---
package com.tsolution.crm.client;
import java.util.ArrayList;
import com.google.gwt.user.client.rpc.AsyncCallback;

public interface GreetingServiceAsync {
  void greetServer(ArrayList modelList, AsyncCallback 
callback);
}
-
package com.tsolution.crm.server;

import java.util.ArrayList;
import com.tsolution.crm.client.GreetingService;
import com.tsolution.crm.client.Model;
import com.google.gwt.user.server.rpc.RemoteServiceServlet;

public class GreetingServiceImpl extends RemoteServiceServlet implements
GreetingService
{

public String greetServer(ArrayList modelList)
{
return modelList.get(0).getDesc();
}
 
}


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Re: GWT Compile error

[Salvador Diaz]

If you read the whole stacktrace you'll see that there are other
errors:

 Scanning for additional dependencies: jar:file:/D:/Program%20Files/
gxt-2.0-m1/gxt.jar!/com/extjs/gxt/ui/client/data/BeanModelLookup.java
  Computing all possible rebind results for
'com.extjs.gxt.ui.client.data.BeanModelLookup'
 Rebinding com.extjs.gxt.ui.client.data.BeanModelLookup
Invoking 
   [ERROR] Class
com.extjs.gxt.ui.client.data.BeanModelLookup not found.

It looks like it's a problem with your module declarations but without
more details I can't be sure.

Cheers,

Salvador

On Apr 18, 1:22 pm, bruce  wrote:
> when I try compile a sample of Extjs-GWT. it hit the follow exception.
> but I have the missing class
> "com.pipnet.resources.client.model.Customer" in the same project.
> anybody can tell me why? thanks a lot
>
> Compiling module com.pipnet.desktop.Desktop
>    Refreshing module from source
>       Refreshing TypeOracle
>          Processing types in compilation unit: file:/C:/Documents%20and
> %20Settings/bruce.gao/workspace_3.4/Desktop/src/com/pipnet/resources/
> client/model/CustomerBeanModel.java
>             Found type 'CustomerBeanModel'
>                Resolving annotation '@BEAN
> (com.pipnet.resources.client.model.Customer.class)'
>                   [ERROR]
> java.lang.ClassNotFoundException:
> com.pipnet.resources.client.model.Customer
>         at java.net.URLClassLoader$1.run(URLClassLoader.java:200)
>         at java.security.AccessController.doPrivileged(Native Method)
>         at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
>         at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
>         at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:268)
>         at java.lang.ClassLoader.loadClass(ClassLoader.java:251)
>         at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:319)
>         at java.lang.Class.forName0(Native Method)
>         at java.lang.Class.forName(Class.java:242)
>         at com.google.gwt.dev.javac.TypeOracleMediator.getClassLiteral
> (TypeOracleMediator.java:763)
>         at
> com.google.gwt.dev.javac.TypeOracleMediator.getAnnotationElementValue
> (TypeOracleMediator.java:674)
>         at
> com.google.gwt.dev.javac.TypeOracleMediator.createAnnotationInstance
> (TypeOracleMediator.java:442)
>         at com.google.gwt.dev.javac.TypeOracleMediator.resolveAnnotation
> (TypeOracleMediator.java:836)
>         at com.google.gwt.dev.javac.TypeOracleMediator.resolveAnnotations
> (TypeOracleMediator.java:857)
>         at com.google.gwt.dev.javac.TypeOracleMediator.resolveTypeDeclaration
> (TypeOracleMediator.java:1384)
>         at com.google.gwt.dev.javac.TypeOracleMediator.addNewUnits
> (TypeOracleMediator.java:389)
>         at com.google.gwt.dev.javac.TypeOracleMediator.refresh
> (TypeOracleMediator.java:417)
>         at com.google.gwt.dev.javac.CompilationState.refresh
> (CompilationState.java:179)
>         at com.google.gwt.dev.javac.CompilationState.
> (CompilationState.java:93)
>         at com.google.gwt.dev.cfg.ModuleDef.getCompilationState
> (ModuleDef.java:264)
>         at com.google.gwt.dev.Precompile.precompile(Precompile.java:283)
>         at com.google.gwt.dev.Compiler.run(Compiler.java:170)
>         at com.google.gwt.dev.Compiler$1.run(Compiler.java:124)
>         at com.google.gwt.dev.CompileTaskRunner.doRun(CompileTaskRunner.java:
> 84)
>         at com.google.gwt.dev.CompileTaskRunner.runWithAppropriateLogger
> (CompileTaskRunner.java:78)
>         at com.google.gwt.dev.Compiler.main(Compiler.java:131)
>    Scanning for additional dependencies: jar:file:/D:/Program%20Files/
> gxt-2.0-m1/gxt.jar!/com/extjs/gxt/ui/client/data/BeanModelLookup.java
>       Computing all possible rebind results for
> 'com.extjs.gxt.ui.client.data.BeanModelLookup'
>          Rebinding com.extjs.gxt.ui.client.data.BeanModelLookup
>             Invoking  class='com.extjs.gxt.ui.rebind.core.BeanModelGenerator'/>
>                [ERROR] Class
> com.extjs.gxt.ui.client.data.BeanModelLookup not found.
> java.lang.NullPointerException
>         at com.extjs.gxt.ui.rebind.core.BeanModelGenerator.getMarkerBean
> (BeanModelGenerator.java:170)
>         at com.extjs.gxt.ui.rebind.core.BeanModelGenerator.generate
> (BeanModelGenerator.java:53)
>         at com.google.gwt.dev.cfg.RuleGenerateWith.realize
> (RuleGenerateWith.java:49)
>         at com.google.gwt.dev.shell.StandardRebindOracle$Rebinder.tryRebind
> (StandardRebindOracle.java:113)
>         at com.google.gwt.dev.shell.StandardRebindOracle$Rebinder.rebind
> (StandardRebindOracle.java:62)
>         at com.google.gwt.dev.shell.StandardRebindOracle.rebind
> (StandardRebindOracle.java:172)
>         at com.google.gwt.dev.shell.StandardRebindOracle.rebind
> (StandardRebindOracle.java:161)
>         at com.google.gwt.dev.Precompile
> $DistillerRebindPermutationOracle.getAllPossibleRebindAnswers
> (Precompile.java:204)
>         at
> com.google.gwt.dev.jdt.WebMod

Re: send request data to php with requestbuilder

[Salvador Diaz]

What do you mean "they won't work now" ?

 Do you have errors we can look at so we can diagnose the problem ? Or
some sort of analysis of your own ? Have you inspected the requests
being sent by your GWT client with firebug ? It can tell you if the
request is fine so you can be sure that it's not a GWT problem.

Also, make sure that you understand the limitations introduced by the
Same Origin Policy when trying to communicate with a backend different
than plain GWT RPC's

Cheers,

Salvador

On Apr 18, 4:27 pm, Ikon  wrote:
> I am trying to send some string to a php file and a request data:
>
> req_builder.sendRequest("test_key=test_value", new RequestCallback()
> {...
>
> and I wish to access the test_value like $_REQUEST['test_key'] in php.
> Later i wish to send multiple query variables too. I wish to send
> parameters to give it to sql queries.
> I have tried to set the header to setHeader("Content-Type",
> "application/x-www-form-urlencoded"), but that won't help either. I am
> getting empty $_REQUEST array.
>
> I wish to receive some working example for GWT 1.6.
> I know there are some 2-3 year examples out there in this group, but
> they won't work now.
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Re: CSS style rules of DecoratorPanel

[Salvador Diaz]

I think tht the best way to "visualize exactly where the CSS rules are
applied" is to inspect your generated code with Firebug. In fact it'll
help you with so many other things that you'll probably adopt it in no
time as one of your day to day tools

cheers,

Salvador

On Apr 18, 6:03 pm, hezjing  wrote:
> Hi
> I'm still trying with DecoratorPanel, and I'm not sure what are the *Inner
> CSS style rules means.
> For example, .what is the different between .bottomLeft and bottomLeftInner?
> And the different between bottomCenter and bottomCenterInner?
>
> .gwt-DecoratorPanel .bottomLeft { the bottom left cell }
> .gwt-DecoratorPanel .bottomLeftInner { the inner element of the cell }
>
> .gwt-DecoratorPanel .bottomCenter { the bottom center cell }
> .gwt-DecoratorPanel .bottomCenterInner { the inner element of the cell }
>
> Hmmm ... I probably need a diagram to visualize exactly where does the CSS
> style rules applied to the DecoratorPanel :-)
>
> --
>
> Hez
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Re: How much slower is PRETTY mode?

[Vitali Lovich]

I just listened to the talk - didn't hear him say anything regarding
performance of long name vs short names.

The execution difference for smaller names shouldn't exist for the new
generation of browsers using JIT for javascript (i.e. FF3.5, Safair 4,
Chrome).

Even with older browsers, I don't see it being super significant -
1-2% at most if it's even measurable.  The execution of the javascript
code by the interpreter should far outweigh the cost of tokenizing the
input even if you have a 100 character name.  The cost of doing a 100
byte memcpy should be insignificant compared to all the other stuff
the interpreter must do.  However, I could be wrong - I haven't tested
this in any way, so hard numbers from real-world examples would
probably be best.

On Sun, Apr 19, 2009 at 12:25 AM, Arthur Kalmenson
 wrote:
>
> I don't know the exact numbers. But if I remember correctly, during
> Bruce's presentation, "Faster-than-Possible Code: Deferred Binding
> with GWT" 
> (http://sites.google.com/site/io/faster-than-possible-code-deferred-binding-with-gwt)
> at Google I/O 2008, he mentioned something about smaller function and
> variable names executing faster then longer names.
>
> Also, as Vitali said, you're code is going to be rather bloated. We
> were accidentally running one of our apps in PRETTY and found the
> before compression size was 3 MB and after compression was 400kb. When
> we changed to OBF, the before compression size was 500kb and
> compressed was somewhere around 120kb.
>
> What's the reason that you want to run it as PRETTY? If you want to
> make the functions callable from regular JS, you should take a look at
> Ray Cromwell's excellent GWT Exporter project:
> http://code.google.com/p/gwt-exporter/
>
> --
> Arthur Kalmenson
>
>
>
> On Sat, Apr 18, 2009 at 1:46 AM, Vitali Lovich  wrote:
>>
>> I believe that it should be the same performance in terms of
>> execution.  You're download times will probably suffer - I wouldn't be
>> surprised if the code bloats by 2-3x if not more.
>>
>> On Fri, Apr 17, 2009 at 11:40 PM, Dobes  wrote:
>>>
>>> I'm considering deploying a version in PRETTY mode since it may solve
>>> a Safari 4 issue I'm having and it would also allow me to interpret
>>> the stack traces produced by Firefox a lot better.
>>>
>>> However, I'm wondering what experiences people have had with the
>>> performance of PRETTY more - how is it?
>>>
>>> Thanks in advance,
>>> Dobes
>>>
>>>
>>> >
>>>
>>
>> >
>>
>
> >
>

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Re: Simple Loading While GWT Application Loads

[Salvador Diaz]

It's not really "Loading While GWT Application Loads", because when
that code executes it means that GWT and your application have
finished loading. Your example is about showing a progress bar while
your already loaded application is adding widgets to a table at a rate
of 1 every 25 milliseconds (the data is already loaded).

Before your GWT application loads, there's not much you can do to show
the progress of the loading. One good trick is to have your host HTML
(the file called YourModuleName.html) display a circular progress icon
in a div occupying the whole browser window and then remove that div
as the first call in your GWT code after you've instantiated all of
your UI components.

Cheers,

Salvador

On Apr 18, 10:17 pm, Vagner Araujo  wrote:
> this is a small sample of Loading While GWT Application Loads,
> perhaps this example can help someone.
>
> package com.javaneses.example.loading.client;
>
> import java.util.List;
>
> 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.Window;
> import com.google.gwt.user.client.rpc.AsyncCallback;
> import com.google.gwt.user.client.ui.FlexTable;
> import com.google.gwt.user.client.ui.PopupPanel;
> import com.google.gwt.user.client.ui.RootPanel;
> import com.google.gwt.widgetideas.client.ProgressBar;
> import com.google.gwt.widgetideas.client.ProgressBar.TextFormatter;
> import com.javaneses.example.loading.client.rpc.service.MyService;
> import
> com.javaneses.example.loading.client.rpc.service.MyServiceAsync;
>
> public class MainTest implements EntryPoint {
>
>         private final PopupPanel loading = new PopupPanel();
>
>         //ProgressBar gwt incubator
>         private final ProgressBar bar = new ProgressBar();
>
>         private final FlexTable flexTable = new FlexTable();
>
>         private Timer timer;
>
>         private final MyServiceAsync myServiceAsync = GWT.create
> (MyService.class);
>
>         private int index;
>
>         public void onModuleLoad() {
>
>                 flexTable.setText(0, 0, "Row");
>                 flexTable.setText(0, 1, "First Name");
>                 flexTable.setText(0, 2, "Last Name");
>                 flexTable.setCellSpacing(5);
>                 flexTable.setVisible(false);
>
>                 RootPanel.get().add(flexTable);
>
>                 bar.setTextVisible(false);
>                 loading.add(bar);
>                 loading.center();
>
>                 AsyncCallback> asyncCallback = new
> AsyncCallback>() {
>                         public void onSuccess(final List result) {
>                                 bar.setTextVisible(true);
>                                 final int count = result.size();
>                                 bar.setMaxProgress(count);
>                                 bar.setProgress(0);
>                                 TextFormatter formatter = new TextFormatter() 
> {
>                                         protected String getText(ProgressBar 
> bar, double curProgress) {
>                                                 return "Loading Data ";
>                                         }//end getText(ProgressBar bar, 
> double curProgress)
>                                 };
>                                 bar.setTextFormatter(formatter);
>                                 timer = new Timer() {
>                                         public void run() {
>                                                 if(count == index){
>                                                         loading.hide();
>                                                         
> flexTable.setVisible(true);
>                                                         timer.cancel();
>                                                 }else{
>                                                         MyBean bean = 
> result.get(index);
>                                                         
> flexTable.setText(index + 1, 0, ""+index);
>                                                         
> flexTable.setText(index + 1, 1, bean.getName());
>                                                         
> flexTable.setText(index + 1, 2, bean.getLastName());
>                                                         index++;
>                                                         
> bar.setProgress(index);
>                                                 }//end else
>                                         }//end run
>                                 };//end timer = new Timer()
>
>                                 timer.scheduleRepeating(25);
>
>                         }//end onSuccess(List result)
>                         public void onFailure(Throwable caught) {
>                                 Window.alert(caught.toString());
>                         }//end onFailure(Throwable caught)
>                 };
>
>                 myServiceAsync.listMyBean(asyncCallback);
>

Re: Adding maximize,collapse,settings option to each widget

[Salvador Diaz]

Look at the Showcase (http://gwt.google.com/samples/Showcase/
Showcase.html) for available GWT widgets. You'll find that
DisclosurePanel is what you're looking for.

Cheers,

Salvador

On Apr 18, 10:59 pm, myapplicationquestions 
wrote:
> Hi,
>
> I need to add maximize,collapse,settings option to each widget that i
> will create (similar to IGOOGLE) where the title bar has those
> options. How do i do that? Can it be done by base GWT or do i have to
> use any extension?
>
> Thanks,
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Re: How to load images dynamically?

[Salvador Diaz]

Also note that ImageBundles cannot be generated dynamically as they're
created by the GWT Compiler as a single image at compile time.
For more information about ImageBundles and its intended purposes read
this: 
http://code.google.com/webtoolkit/doc/1.6/DevGuideUserInterface.html#DevGuideImageBundles

Cheers,

Salvador

On Apr 19, 1:50 am, Vitali Lovich  wrote:
> new Image("path to remote image file here");
>
> On Sat, Apr 18, 2009 at 7:16 PM, POLS  wrote:
>
> > Hi,
>
> > I am using ImageBundle feature.
> > I am using �...@resource annotation, specifying image file location and
> > image name.
> > Its kind of a static behavior.
>
> > I have details of images name and locations in the  database.
> > Can you please tell me, How to load the images?
>
> > Thanks,
> > POLS
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Re: Linked jar ok but then ClassNotFound at runtime for class from inside the jar?

[Salvador Diaz]

Could you post the whole stack trace ?

On Apr 19, 2:48 am, Chris  wrote:
> I added guice.jar to my project which calls various classes in guice.
> Everything compiled fine. But then when I run it, I get a
> ClassNotFound for a class in the guice.jar.
>
> Any ideas why this would be?
>
> com.google.apphosting.utils.jetty.JettyLogger warn
> WARNING: failed gwtPostService
> java.lang.NoClassDefFoundError: com/google/inject/Module
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Re: GWT 1.6 with Maven and build system questions/survey...

[Salvador Diaz]

> I know I am doing something dumb but any suggestions?  Also why am I
> getting the embedded Tomcat message--I thought things in 1.6 were
> transitioning to Jetty?

If you run that goal in debug mode (mvn gwt:run -X) it should tell you
exactly what it's doing (it sounds like it's using a gwt-dev-1.5
instead of 1.6)

> Does the codehaus maven plugin have a decent mailing list?

The mailing list (http://mojo.codehaus.org/gwt-maven-plugin/mail-
lists.html) is for the whole Mojo project so you'll also get mails
from users of other maven plugins hosted at mojo. I agree it's a bit
of a pain, but since the issue tracker only has 11 open issues (http://
jira.codehaus.org/browse/MGWT) I think you should be able to report
any issues you've found and get a quick response.

> Yep, me too.  Yet more time spent futzing around trying to keep my src
> tree clean.

Stop being disappointed (it doesn't help in anything) and help us in
making GWT better (http://code.google.com/webtoolkit/
makinggwtbetter.html)

Cheers,

Salvador
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Re: Error compiling GWT application in Eclipse

[Salvador Diaz]

That's an appengine error, are you sure you want yo use the app engine
sdk in your application ? If you do, try asking your question here:
http://groups.google.com/group/google-appengine

Cheers,

Salvador

On Apr 19, 5:06 am, mabebe  wrote:
> Please help...i keep getting this error when trying to build a GWT
> project in eclipse.
>
> Apr 18, 2009 11:04:55 PM org.datanucleus.enhancer.DataNucleusEnhancer
> addMessage
> SEVERE: An error occured for ClassEnhancer "ASM" when trying to call
> the method "org.datanucleus.enhancer.asm.ASMClassEnhancer" on class
> "getClassNameForFileName" : org.objectweb.asm.ClassReader.accept(Lorg/
> objectweb/asm/ClassVisitor;I)V
> java.lang.NoSuchMethodError: org.objectweb.asm.ClassReader.accept(Lorg/
> objectweb/asm/ClassVisitor;I)V
>         at
> org.datanucleus.enhancer.asm.ASMClassEnhancer.getClassNameForFileName
> (ASMClassEnhancer.java:154)
>         at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
>         at sun.reflect.NativeMethodAccessorImpl.invoke
> (NativeMethodAccessorImpl.java:39)
>         at sun.reflect.DelegatingMethodAccessorImpl.invoke
> (DelegatingMethodAccessorImpl.java:25)
>         at java.lang.reflect.Method.invoke(Method.java:597)
>         at
> org.datanucleus.enhancer.DataNucleusEnhancer.getClassNameForFilename
> (DataNucleusEnhancer.java:900)
>         at
> org.datanucleus.enhancer.DataNucleusEnhancer.getFileMetadataForInput
> (DataNucleusEnhancer.java:716)
>         at org.datanucleus.enhancer.DataNucleusEnhancer.enhance
> (DataNucleusEnhancer.java:525)
>         at org.datanucleus.enhancer.DataNucleusEnhancer.main
> (DataNucleusEnhancer.java:1235)
>         at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
>         at sun.reflect.NativeMethodAccessorImpl.invoke
> (NativeMethodAccessorImpl.java:39)
>         at sun.reflect.DelegatingMethodAccessorImpl.invoke
> (DelegatingMethodAccessorImpl.java:25)
>         at java.lang.reflect.Method.invoke(Method.java:597)
>         at com.google.appengine.tools.enhancer.Enhancer.execute(Enhancer.java:
> 57)
>         at com.google.appengine.tools.enhancer.Enhance.(Enhance.java:
> 60)
>         at com.google.appengine.tools.enhancer.Enhance.main(Enhance.java:41)
> .
> An error occured for ClassEnhancer "ASM" when trying to call the
> method "org.datanucleus.enhancer.asm.ASMClassEnhancer" on class
> "getClassNameForFileName" : org.objectweb.asm.ClassReader.accept(Lorg/
> objectweb/asm/ClassVisitor;I)V
> java.lang.NoSuchMethodError: org.objectweb.asm.ClassReader.accept(Lorg/
> objectweb/asm/ClassVisitor;I)V
>         at
> org.datanucleus.enhancer.asm.ASMClassEnhancer.getClassNameForFileName
> (ASMClassEnhancer.java:154)
>         at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
>         at sun.reflect.NativeMethodAccessorImpl.invoke
> (NativeMethodAccessorImpl.java:39)
>         at sun.reflect.DelegatingMethodAccessorImpl.invoke
> (DelegatingMethodAccessorImpl.java:25)
>         at java.lang.reflect.Method.invoke(Method.java:597)
>         at
> org.datanucleus.enhancer.DataNucleusEnhancer.getClassNameForFilename
> (DataNucleusEnhancer.java:900)
>         at
> org.datanucleus.enhancer.DataNucleusEnhancer.getFileMetadataForInput
> (DataNucleusEnhancer.java:716)
>         at org.datanucleus.enhancer.DataNucleusEnhancer.enhance
> (DataNucleusEnhancer.java:525)
>         at org.datanucleus.enhancer.DataNucleusEnhancer.main
> (DataNucleusEnhancer.java:1235)
>         at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
>         at sun.reflect.NativeMethodAccessorImpl.invoke
> (NativeMethodAccessorImpl.java:39)
>         at sun.reflect.DelegatingMethodAccessorImpl.invoke
> (DelegatingMethodAccessorImpl.java:25)
>         at java.lang.reflect.Method.invoke(Method.java:597)
>         at com.google.appengine.tools.enhancer.Enhancer.execute(Enhancer.java:
> 57)
>         at com.google.appengine.tools.enhancer.Enhance.(Enhance.java:
> 60)
>         at com.google.appengine.tools.enhancer.Enhance.main(Enhance.java:41)
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Re: how to get scroll bar controll

[Salvador Diaz]

Read the javadoc:
http://google-web-toolkit.googlecode.com/svn/javadoc/1.5/com/google/gwt/user/client/ui/ScrollPanel.html#getScrollPosition()

And please read all of the recommended docs before posting
questions ;)

Excerpt from the home page for this discussion group:
" Feel free to post messages on any GWT-related topic, but please
check the list of resources above first; you may find your question
has already been answered. "

Cheers,

Salvador

On Apr 19, 7:00 am, damu daran  wrote:
> sir ,
>
>         I am using Google search API , java , GWT 1.5.3 , JSON .
>
>         I want to get the scroll bar  position .
>
>         Actually I am using HorizontalSplitPanel , because of these i am
> having three scroll  bar in a page.
>
>         In mean HorizontalSplitPanel's left Panel having one scroll bar ,
> right panel having another one scroll bar and browser having its own scroll
> bar .
> *
>        I want to listen  each of the scroll bar control.
>
>        Especially i want to call a function if scroll reaches reached the
> bottom of the page.
>
> *
>
>        This is the coding i am using...
>
> import com.google.gwt.core.client.EntryPoint;
> import com.google.gwt.core.client.GWT;
> import com.google.gwt.user.client.Window;
> import com.google.gwt.user.client.ui.*;
>
>   // some code here
> *
>     HorizontalSplitPanel hSplitPanel = new HorizontalSplitPanel();*
>     HorizontalPanel hPanel1 = new HorizontalPanel();
>
>     hSplitPanel.setSize("1200px","600px");
>     hSplitPanel.setSplitPosition("50%");
>
> // some code here
>
>     Label label1 =new Label(text);
>     Label label2 =new Label(text);
>
> // some code here
>
>     hSplitPanel.setLeftWidget(label1);
>     hSplitPanel.setRightWidget(label2);
>
> // some code here
>
>     RootPanel.get().add(hSplitPanel);
>
> }
>
>        * Help me to find the scorll bar position for these three scroll bar.
> *
>
> Waiting for ur reply.
>
> Regards
> S.Damodaran.
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Re: How to load a website in a panel

[Salvador Diaz]

Load each site in a different iframe (http://www.w3.org/TR/html401/
present/frames.html#h-16.5)

If you want it to be done after a button click:

Button button = new Button("load iframes");
button.addClickListener(new ClickListener(){
public void onClick(Widget sender){
//get the iframes and set the source to whatever you want
}
});

Cheers,

Salvador

On Apr 19, 7:08 am, "jaga.mcap...@gmail.com" 
wrote:
> Hi,
>         How to load four different pages in single page.
>
>         If i clicked a button , four different websites(e.g : google.com ,
> yahoo.com , wikipedia.com, gmail.com) to be load in my page .
>
>        Actually i want to know , what is the code to load the website
> in a panel .
>
>         By using Java , GWT 1.5.3 .
>
> Regards
> Jagadesh
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Re: Regarding an Uncaught Exception Displaying

[shajeer kt]

Helloo,

  Some body  please help me to solve this issue

On Tue, Apr 14, 2009 at 4:29 PM, shajeer kt  wrote:

>
> Hiii,
>
>   Thanks for your reply,
>
> Fusioncharts are widgets which are working with Flash.
>
> FusionCharts is a flash charting component that can be used to render
> data-driven animated charts. Made in Adobe Flash 8 (formerly Macromedia
> Flash),
>
> My application is like that,initially when the page is loaded a fusion
> chart is loaded along with that.Now if i clicked on the fusion chart bar
> another chart is getting loaded.If i clicked the second one,third fusion
> chart is loaded. So this is in a drill down manner.
>
> That means fusion charts are working fine.
> Now i am going to load the second page and the fusion chart is loaded
> perfectly.Now i am going to click the fusion chart for the drill down chart.
> But it is going to blank page where nothing is viewed even the grid in the
> page..
>
>
> Now again  i tried to restart my application and loaded the page which
> caused problem previously,it will work fine,But the other page which was
> working fine had gone to a blank page as i said early.
>
> This is happening only in gogle hosted mode and IE.Its working fine in
> Mozilla firefox.
>
> I am calling the fusion chart in GWT in below manner.
>
> *public static Panel createRequestFusionChart(Map
> urlsParam,int chartWidth, int chartHigh) {
>
> Panel chartPanel = new Panel();
> final Panel fusionPanel1 = new Panel();
>
> chartPanel.setWidth(chartWidth);
>
>
> final Map parameters = new HashMap Object>();
> Iterator params = urlsParam.values().iterator();
> UrlParam urlParam;
> while(params.hasNext())
> {
> urlParam = params.next();
> parameters.put(urlParam.getName(), urlParam.getValue());
>
>
> }
>
> ParametersProvider parmParametersProvider = new
> ParametersProvider() {
>
> public Map getParameters() {
>
> //Map parameters = new HashMap();
> parameters.put("userid", "0");
> parameters.put("charttype", "1");
> parameters.put("chartmethod", "Request");
> parameters.put("dept", "19");
> parameters.put("link", "1");
> return parameters ;
> }
> } ;
>
>
> String chartName = "StackedColumn3D";
> String chartUrl = GWT.getModuleBaseURL() + "FusionCharts/" +
> chartName + ".swf";
> String dataUrl = GWT.getModuleBaseURL() + "ChartServletNew";
>
> FusionChart fusionChart = new FusionChart(chartUrl, 450, 400,
> dataUrl, parmParametersProvider) ;
>
>
> fusionPanel1.add(fusionChart);
>
> final Panel firstRowPanel = new Panel("Requests");
> firstRowPanel.setLayout(new HorizontalLayout(30));
>
> 
>
> ParametersProvider parmParametersProvider1 = new
> ParametersProvider() {
>
> public Map getParameters() {
> //Map parameters = new HashMap();
> parameters.put("userid", "0");
> parameters.put("charttype", "1");
> parameters.put("chartmethod", "emptychart");
>
> return parameters ;
> }
> } ;
>
> chartName = "StackedBar3D";
> chartUrl = GWT.getModuleBaseURL() + "FusionCharts/" + chartName +
> ".swf?ChartNoDataText=Click left chart to view Services Details";
> dataUrl = GWT.getModuleBaseURL() + "ChartServletNew";
>
> fusionChart = new FusionChart(chartUrl, 450, 550, "Human Resources
> (Development)ServDetails", dataUrl, parmParametersProvider1) ;
>
> final Panel fusionPanel2 = new Panel();
> fusionPanel2.add(fusionChart);
>
>
>
> firstRowPanel.add(fusionPanel1);
> firstRowPanel.add(fusionPanel2);
>
>
> 
>
> ParametersProvider parmParametersProviderSubServ = new
> ParametersProvider() {
>
> public Map getParameters() {
>
> //Map parameters = new HashMap();
> parameters.put("userid", "0");
> parameters.put("charttype", "1");
> parameters.put("chartmethod", "emptychart");
> return parameters ;
> }
> } ;
>
> chartName = "StackedBar3D";
> chartUrl = GWT.getModuleBaseURL() + "FusionCharts/" + chartName +
> ".swf?ChartNoDataText=Click Services chart to view subservices details";
> dataUrl = GWT.getModuleBaseURL() + "ChartServletNew";
>
> fusionChart = new FusionChart(chartUrl, 450, 500, "Human Resources
> (Development)SubServDetails", dataUrl, parmParametersProviderSubServ) ;
>
>
> final Panel secondeRowPanel = new Panel("Subservices Chart");
> secondeRowPanel.add(fusionChart);
>
> chartPanel.add(firstRowPanel);
> chartPanel.add(secondeRowPanel);
> return chartPane

Re: How to load a web page in tooltip

[Salvador Diaz]

You can only display plain text on tooltips, you should use a popup to
display HTML
http://google-web-toolkit.googlecode.com/svn/javadoc/1.5/com/google/gwt/user/client/ui/PopupPanel.html
http://gwt.google.com/samples/Showcase/Showcase.html#CwBasicPopup

You should be aware of the limitations imposed by the Same Origin
Policy though (google it if you don't know what that means)

Cheers,

Salvador Diaz

On Apr 19, 7:05 am, "jaga.mcap...@gmail.com" 
wrote:
> Hi,
>          I am using Google search ApI .
>
>          If i place a mouse over the search result ,  i want to load
> corresponding page in the tooltip .
>
>          I dont know how to load a web page in tooltip.
>
>          URL for the web page is available.
>
>         Is it possible to load that webpage in a tooltip . Please help
> me to do this.
>
> Regards
> Jagadesh
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Re: what's wrong here?

[Salvador Diaz]

Well, your async callback doesn't do anything when there's an error,
try this:

public void onFailure(Throwable caught)
{
throw caught;
}

And are you sure there's no output in the hosted browser shell ?
What's the log level you used ?

Cheers,

Salvador

On Apr 19, 9:47 am, Alex Luya  wrote:
> No exception,no output,that is strange
> -
> package com.tsolution.crm.client;
>
> public class Model
> {
>        private String desc;
>
>     public String getDesc()
>     {
>         return desc;
>     }
>     public void setDesc(String desc)
>     {
>         this.desc = desc;
>     }
>
> }
>
> -
> .
> public void onModuleLoad()
>     {
>         Model m1 = new Model();
>         m1.setDesc("Hello");
>
>         AsyncCallback callback=new AsyncCallback(){
>             public void onFailure(Throwable caught)
>             {
>             }
>
>             public void onSuccess(String result)
>             {
>                 Window.alert(result);
>             }
>         };
>
>         ArrayList modelList=new ArrayList();
>         modelList.add(m1);
>
>         loginService.greetServer(modelList, callback);}
>
> 
>
> --
> package com.tsolution.crm.client;
>
> import java.util.ArrayList;
> import com.google.gwt.user.client.rpc.RemoteService;
> import com.google.gwt.user.client.rpc.RemoteServiceRelativePath;
>
> @RemoteServiceRelativePath("greet")
> public interface GreetingService extends RemoteService {
>   String greetServer(ArrayList modelList);
>   String greetServer1(String modelList);}
>
> ---
> package com.tsolution.crm.client;
> import java.util.ArrayList;
> import com.google.gwt.user.client.rpc.AsyncCallback;
>
> public interface GreetingServiceAsync {
>   void greetServer(ArrayList modelList, AsyncCallback
> callback);}
>
> -
> package com.tsolution.crm.server;
>
> import java.util.ArrayList;
> import com.tsolution.crm.client.GreetingService;
> import com.tsolution.crm.client.Model;
> import com.google.gwt.user.server.rpc.RemoteServiceServlet;
>
> public class GreetingServiceImpl extends RemoteServiceServlet implements
>         GreetingService
> {
>
>     public String greetServer(ArrayList modelList)
>     {
>                 return modelList.get(0).getDesc();
>     }
>
> }
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Re: How to load a website in a panel

[Darkflame]

gwt frame widget helps for this;

Frame frame = new Frame("http://www.google.com/";);
frame.setWidth("100%");
frame.setHeight("700px");
RootPanel.get("demo").add(frame);

On Apr 19, 11:55 am, Salvador Diaz  wrote:
> Load each site in a different iframe (http://www.w3.org/TR/html401/
> present/frames.html#h-16.5)
>
> If you want it to be done after a button click:
>
> Button button = new Button("load iframes");
> button.addClickListener(new ClickListener(){
>     public void onClick(Widget sender){
>         //get the iframes and set the source to whatever you want
>     }
>
> });
>
> Cheers,
>
> Salvador
>
> On Apr 19, 7:08 am, "jaga.mcap...@gmail.com" 
> wrote:
>
>
>
> > Hi,
> >         How to load four different pages in single page.
>
> >         If i clicked a button , four different websites(e.g : google.com ,
> > yahoo.com , wikipedia.com, gmail.com) to be load in my page .
>
> >        Actually i want to know , what is the code to load the website
> > in a panel .
>
> >         By using Java , GWT 1.5.3 .
>
> > Regards
> > Jagadesh
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"Google Web Toolkit" group.
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Re: Regarding an Uncaught Exception Displaying

[Salvador Diaz]

You either didn't bother to read my post or you didn't bother trying
what I suggested. As I said before:

"if you don't set the size of the absolutePanel (ie:
absolutePanel.setSize("100%", "100%")) the widgets will be visible in
Firefox but not in IE"

So try setting a size for your panels !

Salvador

On Apr 19, 11:56 am, shajeer kt  wrote:
> Helloo,
>
>       Some body  please help me to solve this issue
>
> On Tue, Apr 14, 2009 at 4:29 PM, shajeer kt  wrote:
>
> > Hiii,
>
> >   Thanks for your reply,
>
> > Fusioncharts are widgets which are working with Flash.
>
> > FusionCharts is a flash charting component that can be used to render
> > data-driven animated charts. Made in Adobe Flash 8 (formerly Macromedia
> > Flash),
>
> > My application is like that,initially when the page is loaded a fusion
> > chart is loaded along with that.Now if i clicked on the fusion chart bar
> > another chart is getting loaded.If i clicked the second one,third fusion
> > chart is loaded. So this is in a drill down manner.
>
> > That means fusion charts are working fine.
> > Now i am going to load the second page and the fusion chart is loaded
> > perfectly.Now i am going to click the fusion chart for the drill down chart.
> > But it is going to blank page where nothing is viewed even the grid in the
> > page..
>
> > Now again  i tried to restart my application and loaded the page which
> > caused problem previously,it will work fine,But the other page which was
> > working fine had gone to a blank page as i said early.
>
> > This is happening only in gogle hosted mode and IE.Its working fine in
> > Mozilla firefox.
>
> > I am calling the fusion chart in GWT in below manner.
>
> > *    public static Panel createRequestFusionChart(Map
> > urlsParam,int chartWidth, int chartHigh) {
>
> >         Panel chartPanel = new Panel();
> >         final Panel fusionPanel1 = new Panel();
>
> >         chartPanel.setWidth(chartWidth);
>
> >         final Map parameters = new HashMap > Object>();
> >         Iterator params = urlsParam.values().iterator();
> >         UrlParam urlParam;
> >         while(params.hasNext())
> >         {
> >             urlParam = params.next();
> >             parameters.put(urlParam.getName(), urlParam.getValue());
>
> >         }
>
> >         ParametersProvider parmParametersProvider = new
> > ParametersProvider() {
>
> >             public Map getParameters() {
>
> >                 //Map parameters = new HashMap();
> >                 parameters.put("userid", "0");
> >                 parameters.put("charttype", "1");
> >                 parameters.put("chartmethod", "Request");
> >                 parameters.put("dept", "19");
> >                 parameters.put("link", "1");
> >                 return parameters ;
> >             }
> >         } ;
>
> >         String chartName = "StackedColumn3D";
> >         String chartUrl = GWT.getModuleBaseURL() + "FusionCharts/" +
> > chartName + ".swf";
> >         String dataUrl = GWT.getModuleBaseURL() + "ChartServletNew";
>
> >         FusionChart fusionChart = new FusionChart(chartUrl, 450, 400,
> > dataUrl, parmParametersProvider) ;
>
> >         fusionPanel1.add(fusionChart);
>
> >         final Panel firstRowPanel = new Panel("Requests");
> >         firstRowPanel.setLayout(new HorizontalLayout(30));
>
> >         
>
> >         ParametersProvider parmParametersProvider1 = new
> > ParametersProvider() {
>
> >             public Map getParameters() {
> >                 //Map parameters = new HashMap();
> >                 parameters.put("userid", "0");
> >                 parameters.put("charttype", "1");
> >                 parameters.put("chartmethod", "emptychart");
>
> >                 return parameters ;
> >             }
> >         } ;
>
> >         chartName = "StackedBar3D";
> >         chartUrl = GWT.getModuleBaseURL() + "FusionCharts/" + chartName +
> > ".swf?ChartNoDataText=Click left chart to view Services Details";
> >         dataUrl = GWT.getModuleBaseURL() + "ChartServletNew";
>
> >         fusionChart = new FusionChart(chartUrl, 450, 550, "Human Resources
> > (Development)ServDetails", dataUrl, parmParametersProvider1) ;
>
> >         final Panel fusionPanel2 = new Panel();
> >         fusionPanel2.add(fusionChart);
>
> >         firstRowPanel.add(fusionPanel1);
> >         firstRowPanel.add(fusionPanel2);
>
> >         
>
> >         ParametersProvider parmParametersProviderSubServ = new
> > ParametersProvider() {
>
> >             public Map getParameters() {
>
> >                 //Map parameters = new HashMap();
> >                 parameters.put("userid", "0");
> >                 parameters.put("charttype", "1");
> >                 parameters.put("chartmethod", "emptychart");
> >                 return parameters ;
> >             }
> >         } ;
>
> >         chartName = "StackedBar3D";
> >         chartUrl = GWT.getModuleBaseURL() + "FusionCharts/" + chartName +
> > ".sw

Re: Error compiling GWT application in Eclipse

[mabebe]

Thanks salvador...

On Apr 19, 5:16 am, Salvador Diaz  wrote:
> That's an appengine error, are you sure you want yo use the app engine
> sdk in your application ? If you do, try asking your question 
> here:http://groups.google.com/group/google-appengine
>
> Cheers,
>
> Salvador
>
> On Apr 19, 5:06 am, mabebe  wrote:
>
> > Please help...i keep getting this error when trying to build a GWT
> > project in eclipse.
>
> > Apr 18, 2009 11:04:55 PM org.datanucleus.enhancer.DataNucleusEnhancer
> > addMessage
> > SEVERE: An error occured for ClassEnhancer "ASM" when trying to call
> > the method "org.datanucleus.enhancer.asm.ASMClassEnhancer" on class
> > "getClassNameForFileName" : org.objectweb.asm.ClassReader.accept(Lorg/
> > objectweb/asm/ClassVisitor;I)V
> > java.lang.NoSuchMethodError: org.objectweb.asm.ClassReader.accept(Lorg/
> > objectweb/asm/ClassVisitor;I)V
> >         at
> > org.datanucleus.enhancer.asm.ASMClassEnhancer.getClassNameForFileName
> > (ASMClassEnhancer.java:154)
> >         at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> >         at sun.reflect.NativeMethodAccessorImpl.invoke
> > (NativeMethodAccessorImpl.java:39)
> >         at sun.reflect.DelegatingMethodAccessorImpl.invoke
> > (DelegatingMethodAccessorImpl.java:25)
> >         at java.lang.reflect.Method.invoke(Method.java:597)
> >         at
> > org.datanucleus.enhancer.DataNucleusEnhancer.getClassNameForFilename
> > (DataNucleusEnhancer.java:900)
> >         at
> > org.datanucleus.enhancer.DataNucleusEnhancer.getFileMetadataForInput
> > (DataNucleusEnhancer.java:716)
> >         at org.datanucleus.enhancer.DataNucleusEnhancer.enhance
> > (DataNucleusEnhancer.java:525)
> >         at org.datanucleus.enhancer.DataNucleusEnhancer.main
> > (DataNucleusEnhancer.java:1235)
> >         at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> >         at sun.reflect.NativeMethodAccessorImpl.invoke
> > (NativeMethodAccessorImpl.java:39)
> >         at sun.reflect.DelegatingMethodAccessorImpl.invoke
> > (DelegatingMethodAccessorImpl.java:25)
> >         at java.lang.reflect.Method.invoke(Method.java:597)
> >         at 
> > com.google.appengine.tools.enhancer.Enhancer.execute(Enhancer.java:
> > 57)
> >         at com.google.appengine.tools.enhancer.Enhance.(Enhance.java:
> > 60)
> >         at com.google.appengine.tools.enhancer.Enhance.main(Enhance.java:41)
> > .
> > An error occured for ClassEnhancer "ASM" when trying to call the
> > method "org.datanucleus.enhancer.asm.ASMClassEnhancer" on class
> > "getClassNameForFileName" : org.objectweb.asm.ClassReader.accept(Lorg/
> > objectweb/asm/ClassVisitor;I)V
> > java.lang.NoSuchMethodError: org.objectweb.asm.ClassReader.accept(Lorg/
> > objectweb/asm/ClassVisitor;I)V
> >         at
> > org.datanucleus.enhancer.asm.ASMClassEnhancer.getClassNameForFileName
> > (ASMClassEnhancer.java:154)
> >         at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> >         at sun.reflect.NativeMethodAccessorImpl.invoke
> > (NativeMethodAccessorImpl.java:39)
> >         at sun.reflect.DelegatingMethodAccessorImpl.invoke
> > (DelegatingMethodAccessorImpl.java:25)
> >         at java.lang.reflect.Method.invoke(Method.java:597)
> >         at
> > org.datanucleus.enhancer.DataNucleusEnhancer.getClassNameForFilename
> > (DataNucleusEnhancer.java:900)
> >         at
> > org.datanucleus.enhancer.DataNucleusEnhancer.getFileMetadataForInput
> > (DataNucleusEnhancer.java:716)
> >         at org.datanucleus.enhancer.DataNucleusEnhancer.enhance
> > (DataNucleusEnhancer.java:525)
> >         at org.datanucleus.enhancer.DataNucleusEnhancer.main
> > (DataNucleusEnhancer.java:1235)
> >         at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> >         at sun.reflect.NativeMethodAccessorImpl.invoke
> > (NativeMethodAccessorImpl.java:39)
> >         at sun.reflect.DelegatingMethodAccessorImpl.invoke
> > (DelegatingMethodAccessorImpl.java:25)
> >         at java.lang.reflect.Method.invoke(Method.java:597)
> >         at 
> > com.google.appengine.tools.enhancer.Enhancer.execute(Enhancer.java:
> > 57)
> >         at com.google.appengine.tools.enhancer.Enhance.(Enhance.java:
> > 60)
> >         at com.google.appengine.tools.enhancer.Enhance.main(Enhance.java:41)
>
>
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Re: Error compiling GWT application in Eclipse

[mabebe]

I  have another build error..do you know the problemi removed the
app engine from the build path already

Loading module 'com.personalsite.Personalsite'
   [ERROR] Failure while parsing XML
org.xml.sax.SAXNotRecognizedException: Feature:
http://apache.org/xml/features/nonvalidating/load-external-dtd
at org.apache.crimson.parser.XMLReaderImpl.setFeature
(XMLReaderImpl.java:213)
at org.apache.crimson.jaxp.SAXParserImpl.setFeatures
(SAXParserImpl.java:143)
at org.apache.crimson.jaxp.SAXParserImpl.(SAXParserImpl.java:
126)
at org.apache.crimson.jaxp.SAXParserFactoryImpl.newSAXParserImpl
(SAXParserFactoryImpl.java:113)
at org.apache.crimson.jaxp.SAXParserFactoryImpl.setFeature
(SAXParserFactoryImpl.java:141)
at com.google.gwt.dev.util.xml.ReflectiveParser$Impl.parse
(ReflectiveParser.java:307)
at com.google.gwt.dev.util.xml.ReflectiveParser$Impl.access$100
(ReflectiveParser.java:48)
at com.google.gwt.dev.util.xml.ReflectiveParser.parse
(ReflectiveParser.java:385)
at com.google.gwt.dev.cfg.ModuleDefLoader.nestedLoad
(ModuleDefLoader.java:243)
at com.google.gwt.dev.cfg.ModuleDefLoader$1.load(ModuleDefLoader.java:
155)
at com.google.gwt.dev.cfg.ModuleDefLoader.doLoadModule
(ModuleDefLoader.java:269)
at com.google.gwt.dev.cfg.ModuleDefLoader.loadFromClassPath
(ModuleDefLoader.java:127)
at com.google.gwt.dev.Compiler.run(Compiler.java:156)
at com.google.gwt.dev.Compiler$1.run(Compiler.java:124)
at com.google.gwt.dev.CompileTaskRunner.doRun(CompileTaskRunner.java:
84)
at com.google.gwt.dev.CompileTaskRunner.runWithAppropriateLogger
(CompileTaskRunner.java:78)
at com.google.gwt.dev.Compiler.main(Compiler.java:131)


On Apr 19, 5:16 am, Salvador Diaz  wrote:
> That's an appengine error, are you sure you want yo use the app engine
> sdk in your application ? If you do, try asking your question 
> here:http://groups.google.com/group/google-appengine
>
> Cheers,
>
> Salvador
>
> On Apr 19, 5:06 am, mabebe  wrote:
>
> > Please help...i keep getting this error when trying to build a GWT
> > project in eclipse.
>
> > Apr 18, 2009 11:04:55 PM org.datanucleus.enhancer.DataNucleusEnhancer
> > addMessage
> > SEVERE: An error occured for ClassEnhancer "ASM" when trying to call
> > the method "org.datanucleus.enhancer.asm.ASMClassEnhancer" on class
> > "getClassNameForFileName" : org.objectweb.asm.ClassReader.accept(Lorg/
> > objectweb/asm/ClassVisitor;I)V
> > java.lang.NoSuchMethodError: org.objectweb.asm.ClassReader.accept(Lorg/
> > objectweb/asm/ClassVisitor;I)V
> >         at
> > org.datanucleus.enhancer.asm.ASMClassEnhancer.getClassNameForFileName
> > (ASMClassEnhancer.java:154)
> >         at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> >         at sun.reflect.NativeMethodAccessorImpl.invoke
> > (NativeMethodAccessorImpl.java:39)
> >         at sun.reflect.DelegatingMethodAccessorImpl.invoke
> > (DelegatingMethodAccessorImpl.java:25)
> >         at java.lang.reflect.Method.invoke(Method.java:597)
> >         at
> > org.datanucleus.enhancer.DataNucleusEnhancer.getClassNameForFilename
> > (DataNucleusEnhancer.java:900)
> >         at
> > org.datanucleus.enhancer.DataNucleusEnhancer.getFileMetadataForInput
> > (DataNucleusEnhancer.java:716)
> >         at org.datanucleus.enhancer.DataNucleusEnhancer.enhance
> > (DataNucleusEnhancer.java:525)
> >         at org.datanucleus.enhancer.DataNucleusEnhancer.main
> > (DataNucleusEnhancer.java:1235)
> >         at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> >         at sun.reflect.NativeMethodAccessorImpl.invoke
> > (NativeMethodAccessorImpl.java:39)
> >         at sun.reflect.DelegatingMethodAccessorImpl.invoke
> > (DelegatingMethodAccessorImpl.java:25)
> >         at java.lang.reflect.Method.invoke(Method.java:597)
> >         at 
> > com.google.appengine.tools.enhancer.Enhancer.execute(Enhancer.java:
> > 57)
> >         at com.google.appengine.tools.enhancer.Enhance.(Enhance.java:
> > 60)
> >         at com.google.appengine.tools.enhancer.Enhance.main(Enhance.java:41)
> > .
> > An error occured for ClassEnhancer "ASM" when trying to call the
> > method "org.datanucleus.enhancer.asm.ASMClassEnhancer" on class
> > "getClassNameForFileName" : org.objectweb.asm.ClassReader.accept(Lorg/
> > objectweb/asm/ClassVisitor;I)V
> > java.lang.NoSuchMethodError: org.objectweb.asm.ClassReader.accept(Lorg/
> > objectweb/asm/ClassVisitor;I)V
> >         at
> > org.datanucleus.enhancer.asm.ASMClassEnhancer.getClassNameForFileName
> > (ASMClassEnhancer.java:154)
> >         at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> >         at sun.reflect.NativeMethodAccessorImpl.invoke
> > (NativeMethodAccessorImpl.java:39)
> >         at sun.reflect.DelegatingMethodAccessorImpl.invoke
> > (DelegatingMethodAccessorImpl.java:25)
> >         at java.lang.reflect.Method.invoke(Method.java:597)
> >         at
> > org.da

Re: How to load images dynamically?

[Vitali Lovich]

Well, that's not technically true.  You could potentially write a framework
that would get the GWT compiler to generate the bundles for you at runtime.
There isn't such a framework right now & it would take some effort to write
I imagine.

You could base it off the work that was done to recompile the code into JS
on the fly when the Java code changes (I forget by which project - it's in
the mailing list archives somewhere).

Something along the lines of - extract the images to disk, generate the code
for the image bundle, invoke the compiler, delete the original images (if
you really want to save space), & then return a map of image alias & the
parameters of the image (i.e. url of the bundle, offsets into the bundle,
size of the image).

On Sun, Apr 19, 2009 at 5:01 AM, Salvador Diaz wrote:

>
> Also note that ImageBundles cannot be generated dynamically as they're
> created by the GWT Compiler as a single image at compile time.
> For more information about ImageBundles and its intended purposes read
> this:
> http://code.google.com/webtoolkit/doc/1.6/DevGuideUserInterface.html#DevGuideImageBundles
>
> Cheers,
>
> Salvador
>
> On Apr 19, 1:50 am, Vitali Lovich  wrote:
> > new Image("path to remote image file here");
> >
> > On Sat, Apr 18, 2009 at 7:16 PM, POLS 
> wrote:
> >
> > > Hi,
> >
> > > I am using ImageBundle feature.
> > > I am using  @Resource annotation, specifying image file location and
> > > image name.
> > > Its kind of a static behavior.
> >
> > > I have details of images name and locations in the  database.
> > > Can you please tell me, How to load the images?
> >
> > > Thanks,
> > > POLS
> >
>

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Re: stateful service

[Vitali Lovich]

Depends on who initiates the service.  If it's the other machine (not the
web server), then in general no, unless you run a custom web server on it
that will convert resource requests (images or JS scripts only) into
commands (the authentication information will have to be encoded in the
names in addition to the commands if you have to have authenticated service)
.  This is quite complicated.

If the web server can control the service, then a simple authenticated RPC
call will suffice.  Don't bother with cookies if you are using RPC.
http://code.google.com/p/google-web-toolkit/wiki/RpcAuth

On Sat, Apr 18, 2009 at 11:16 PM, joshmo  wrote:

>
> What I want to do is log in to an application.  Once logged in, the
> user clicks a button to start a service.  Then the user will remain
> logged in and monitor the service.  The service is used for
> transferring files a different computer to the computer the web server
> is running on.  The web page will update every minute with status of
> server and bandwidth used.  User can log out and log in the next day
> to the same service and continue to monitor the service.
>
> Is this possible? I have been reading about setting a cookie with a
> session id but I don't know if this is going to work or not.  Does
> anyone know if you can maintain session state with a service and that
> service continues to run in a daemon thread even if the user logs out?
>
> Thanks for any response.
>
> >
>

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Re: How to load images dynamically?

[Salvador Diaz]

> There isn't such a framework right now & it would take some effort to write
> I imagine.

So my remark stands true: ImageBundles cannot be generated dynamically
(and by that I meant: with the standard GWT distribution)


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Re: Regarding an Uncaught Exception Displaying

[shajeer kt]

Hi,

  Thanks for your reply.

I am pretty new to GWT . Please dont harsh on me if i asked any foolish
question.

  I am not using an Absolute Panel . I am using
Panel(com.gwtext.client.widgets.Panel) .

  I am using a similar application like  http://www.gwt-ext.com/demo/ .
There they are using Panel.

On Sun, Apr 19, 2009 at 1:07 PM, Salvador Diaz wrote:

>
> You either didn't bother to read my post or you didn't bother trying
> what I suggested. As I said before:
>
> "if you don't set the size of the absolutePanel (ie:
> absolutePanel.setSize("100%", "100%")) the widgets will be visible in
> Firefox but not in IE"
>
> So try setting a size for your panels !
>
> Salvador
>
> On Apr 19, 11:56 am, shajeer kt  wrote:
> > Helloo,
> >
> >   Some body  please help me to solve this issue
> >
> > On Tue, Apr 14, 2009 at 4:29 PM, shajeer kt 
> wrote:
> >
> > > Hiii,
> >
> > >   Thanks for your reply,
> >
> > > Fusioncharts are widgets which are working with Flash.
> >
> > > FusionCharts is a flash charting component that can be used to render
> > > data-driven animated charts. Made in Adobe Flash 8 (formerly Macromedia
> > > Flash),
> >
> > > My application is like that,initially when the page is loaded a fusion
> > > chart is loaded along with that.Now if i clicked on the fusion chart
> bar
> > > another chart is getting loaded.If i clicked the second one,third
> fusion
> > > chart is loaded. So this is in a drill down manner.
> >
> > > That means fusion charts are working fine.
> > > Now i am going to load the second page and the fusion chart is loaded
> > > perfectly.Now i am going to click the fusion chart for the drill down
> chart.
> > > But it is going to blank page where nothing is viewed even the grid in
> the
> > > page..
> >
> > > Now again  i tried to restart my application and loaded the page which
> > > caused problem previously,it will work fine,But the other page which
> was
> > > working fine had gone to a blank page as i said early.
> >
> > > This is happening only in gogle hosted mode and IE.Its working fine in
> > > Mozilla firefox.
> >
> > > I am calling the fusion chart in GWT in below manner.
> >
> > > *public static Panel createRequestFusionChart(Map
> > > urlsParam,int chartWidth, int chartHigh) {
> >
> > > Panel chartPanel = new Panel();
> > > final Panel fusionPanel1 = new Panel();
> >
> > > chartPanel.setWidth(chartWidth);
> >
> > > final Map parameters = new HashMap > > Object>();
> > > Iterator params = urlsParam.values().iterator();
> > > UrlParam urlParam;
> > > while(params.hasNext())
> > > {
> > > urlParam = params.next();
> > > parameters.put(urlParam.getName(), urlParam.getValue());
> >
> > > }
> >
> > > ParametersProvider parmParametersProvider = new
> > > ParametersProvider() {
> >
> > > public Map getParameters() {
> >
> > > //Map parameters = new HashMap();
> > > parameters.put("userid", "0");
> > > parameters.put("charttype", "1");
> > > parameters.put("chartmethod", "Request");
> > > parameters.put("dept", "19");
> > > parameters.put("link", "1");
> > > return parameters ;
> > > }
> > > } ;
> >
> > > String chartName = "StackedColumn3D";
> > > String chartUrl = GWT.getModuleBaseURL() + "FusionCharts/" +
> > > chartName + ".swf";
> > > String dataUrl = GWT.getModuleBaseURL() + "ChartServletNew";
> >
> > > FusionChart fusionChart = new FusionChart(chartUrl, 450, 400,
> > > dataUrl, parmParametersProvider) ;
> >
> > > fusionPanel1.add(fusionChart);
> >
> > > final Panel firstRowPanel = new Panel("Requests");
> > > firstRowPanel.setLayout(new HorizontalLayout(30));
> >
> > > 
> >
> > > ParametersProvider parmParametersProvider1 = new
> > > ParametersProvider() {
> >
> > > public Map getParameters() {
> > > //Map parameters = new HashMap();
> > > parameters.put("userid", "0");
> > > parameters.put("charttype", "1");
> > > parameters.put("chartmethod", "emptychart");
> >
> > > return parameters ;
> > > }
> > > } ;
> >
> > > chartName = "StackedBar3D";
> > > chartUrl = GWT.getModuleBaseURL() + "FusionCharts/" + chartName
> +
> > > ".swf?ChartNoDataText=Click left chart to view Services Details";
> > > dataUrl = GWT.getModuleBaseURL() + "ChartServletNew";
> >
> > > fusionChart = new FusionChart(chartUrl, 450, 550, "Human
> Resources
> > > (Development)ServDetails", dataUrl, parmParametersProvider1) ;
> >
> > > final Panel fusionPanel2 = new Panel();
> > > fusionPanel2.add(fusionChart);
> >
> > > firstRowPanel.add(fusionPanel1);
> > > firstRowPanel.add(fu

Re: GWT 1.6 with Maven and build system questions/survey...

[Murray Waters]

I think i'm going to open a new issue saying that they should have their own
mailing list :-)

>
> The mailing list (http://mojo.codehaus.org/gwt-maven-plugin/mail-
> lists.html )
> is for the whole Mojo project so you'll also get mails
> from users of other maven plugins hosted at mojo. I agree it's a bit
> of a pain, but since the issue tracker only has 11 open issues (http://
> jira.codehaus.org/browse/MGWT) I think you should be able to report
> any issues you've found and get a quick response.
>
> > Yep, me too.  Yet more time spent futzing around trying to keep my src
> > tree clean.
>
> Stop being disappointed (it doesn't help in anything) and help us in
> making GWT better (http://code.google.com/webtoolkit/
> makinggwtbetter.html
> )
>
>
>

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Re: How to load images dynamically?

[Vitali Lovich]

I thought you were stating an absolute (i.e. it's not possible at all to use
the image bundle concept).  My bad.

On Sun, Apr 19, 2009 at 6:44 AM, Salvador Diaz wrote:

>
> > There isn't such a framework right now & it would take some effort to
> write
> > I imagine.
>
> So my remark stands true: ImageBundles cannot be generated dynamically
> (and by that I meant: with the standard GWT distribution)
>
>
> >
>

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Re: what's wrong here?

[Vagner Araujo]

Hi friends,

try now.


package com.tsolution.crm.client;

import java.io.Serializable;


public class Model implements Serializable {

private static final long serialVersionUID = 5693662550097196303L;

private String desc;

public String getDesc() {
return desc;
}//end getDesc

public void setDesc(String desc) {
this.desc = desc;
}//end setDesc

}//end class


//SERVICE CLASS

package com.tsolution.crm.client;

import java.util.ArrayList;
import com.google.gwt.user.client.rpc.RemoteService;
import com.google.gwt.user.client.rpc.RemoteServiceRelativePath;


@RemoteServiceRelativePath("greet")
public interface GreetingService extends RemoteService {
 String greetServer(ArrayList modelList);
 String greetServer1(String modelList);
}//end interface


package com.tsolution.crm.client;
import java.util.ArrayList;
import com.google.gwt.user.client.rpc.AsyncCallback;

public interface GreetingServiceAsync {

void greetServer(ArrayList modelList, AsyncCallback
callback);

void greetServer1(String modelList, AsyncCallback
asyncCallback);
}//end interface



package com.tsolution.crm.server;

import java.util.ArrayList;
import com.tsolution.crm.client.GreetingService;
import com.tsolution.crm.client.Model;
import com.google.gwt.user.server.rpc.RemoteServiceServlet;

public class GreetingServiceImpl extends RemoteServiceServlet
implements
GreetingService {

private static final long serialVersionUID = 1L;

@Override
public String greetServer(ArrayList modelList) {
return modelList.get(0).getDesc();
}//end greetServer(ArrayList modelList)

@Override
public String greetServer1(String modelList) {
return null;
}//end greetServer1(String modelList)
}//end class


public void onModuleLoad() {

GreetingServiceAsync greetingServiceAsync = GWT
.create(GreetingService.class);

Model m1 = new Model();
m1.setDesc("Hello");

AsyncCallback callback = new AsyncCallback() {
public void onFailure(Throwable caught) {
}

public void onSuccess(String result) {
Window.alert(result);
}
};

ArrayList modelList = new ArrayList();
modelList.add(m1);

greetingServiceAsync.greetServer(modelList, callback);

}//end onModuleLoad


Vagner Araujo
Java + Vagner = Javagner
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Re: How to import samples of GWT into Eclipse

[spike2...@googlemail.com]

So what exactly do I have to do?
Where in my Cmdline do i have to go and what do I have to execute to
be able to import the samples as eclipse projects?
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RE: How to import samples of GWT into Eclipse

[Ananda]

Use the below command line 

projectCreator.cmd -out  -eclipse 

Cheers,
Ananda 

-Original Message-
From: Google-Web-Toolkit@googlegroups.com
[mailto:google-web-tool...@googlegroups.com] On Behalf Of
spike2...@googlemail.com
Sent: Sunday, April 19, 2009 5:44 PM
To: Google Web Toolkit
Subject: Re: How to import samples of GWT into Eclipse


So what exactly do I have to do?
Where in my Cmdline do i have to go and what do I have to execute to
be able to import the samples as eclipse projects?


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Re: JServer - Modular to build GWT and SOA applications

[Rauf]

The SOAFaces framework itself does not support or care about on-the-
fly GWT compiling. This is a feature of JServer which leverages
SOAFaces to deploy and manage modular and component packagable GWT/SOA
applications. JServer lets you do both, you can compile your GWT code
the usual way and deploy it to the JServer's webserver or you can
leave it in java byte code and let JServer compile it using its GWT
compiler. The main advantage of the on-the-fly GWT compiling is that
if you upgrade your JServer version for example and it is now using
GWT 1.6 (instead of GWT 1.5) you would not need to recompile your
SOAFaces application and redeploy them again, JServer would detect
that the GWT libraries are 1.6 and would recompile the SOAFaces
applications to javascript automatically.

Note, that SOAFaces itself can be used in any web application and can
be used directly as part of any GWT application. The framework is made
up of several key features that can be used separate from each other
(very modular design). The no RPC feature along with the remote
invokation of POJO objects (and ability to return/send JSON and POJO
objects) makes using GWT a real convienence.

-Rauf

On Apr 17, 10:55 pm, Vitali Lovich  wrote:
> The soafaces thing is so cool.  POJO access w/ no RPC - why oh why
> didn't I know about this 2 months ago.
>
> What's the benefit of using the on-the-fly GWT compiler?  When would
> you ever need to deploy a change to the code like that as opposed to
> compiling it traditionally & simply replacing the resources.
>
> On Fri, Apr 17, 2009 at 7:52 PM, Rauf  wrote:
>
> > New release ofJServerwhich supports bulding GWT and SOA powered
> > applications using no RPC. Deploy your GWT applications as modular
> > components with access to full SOA environment.
>
> >JServeralso includes a unique On-The-Fly GWT compiler that will
> > compile your GWT application into javascript on the fly - very cool
> > feature.JServeris based on the open source framework SOAFaces.
>
> >JServeravailable for free!
> >http://grandlogic.blogspot.com/2009/04/jserver-now-supports-gwt-and-s...
>
> > Open source framework:
> >http://code.google.com/p/soafaces/
>
> > Rauf
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Re: GWT 1.6 with Maven and build system questions/survey...

[Mark Renouf]

The thing I'd not like to lose, is "live-edit" capability. ie: changes
take effect with a simple page reload in HostedMode (and also Restart
Server button in 1.6).

I think GWT provides enough options to make things work, but it's
harder than it should be. If I had a magic wand though, I'd say having
"war dir overlay" parameter would make life much simpler. If it could
do this, and still detect changes to the source, that would be sweet.
You'd just set -warOverlay /src/main/webapp -war /target/$
{project.build.finalName} That actually wouldn't effect existing users
one bit. Actually... maybe I should work on a patch and submit it to
GWT, you never know ;-)

On Apr 16, 2:00 pm, Matt Bishop  wrote:
> One of the big wins with Maven is the "rigid" directory structure,
> where source files of all stripes are in src/ and build outputs are in
> target/. It's good practice because it doesn't allow for intermingling
> source files and build files.
>
> The new GWT war/ dir next to src/ problematic because you have to be
> careful how you clean up.  I can see many an "aaargh!" being screamed
> out in the early morning hours when a tired developer discovers a bug
> in her ant script, or when he trashes the war/ dir accidentally.
>
> I would much rather have seen src/java and src/war (better yet, src/
> webapp) and the HostedMode compiler would copy src/webapp to war/
> before compilation. It would be a whole lot safer and wouldn't really
> cost that much, even for large projects with a whole lotta webapp/**
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Re: Announcing GWT 1.6...and quite a bit more

[Salvador Diaz]

Where should we report bugs found in the Eclipse plugin ?

Thanks in advance,

Salvador

On Apr 10, 8:44 am, Ramas  wrote:
> why exclusive support for Eclipse ? For the past few years Netbeans
> became a lot better, than it used to, and there's large developer
> community, too. Can you provide out-of-box support for Netbeans in the
> future ?
>
> On Apr 8, 6:57 am, Bruce Johnson  wrote:
>
> > Hi Folks!
>
> > Exciting news today. Rather than attempting to describe everything here, let
> > me point you to some blog posts that hopefully you will find interesting:
>
> > GWT 1.6 and 
> > friends:http://googlewebtoolkit.blogspot.com/2009/04/introducing-gwt-16-and-f...
>
> > Seriously this time, the new language on App Engine: 
> > Javahttp://googleappengine.blogspot.com/2009/04/seriously-this-time-new-l...
>
> > Google Plugin for Eclipse -- Peanut Butter to Eclipse's 
> > Chocolatehttp://googlewebtoolkit.blogspot.com/2009/04/google-plugin-for-eclips...
>
> > -- Bruce, on behalf of the GWT, App Engine, and Google Plugin teams
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Re: How much slower is PRETTY mode?

[Dobes Vandermeer]

Thanks ... that helps a little.
I wanted PRETTY so I could interpret the stack traces that show up in
Firefox - there are various stack traces showing up in customer's machines
that I am now seeing on my development environment.

Also, there's a bug in Safari 4 beta where it can't handle my obfuscated GWT
code since a line gets too long (or something).

So PRETTY would be helpful for these.


On Sat, Apr 18, 2009 at 9:25 PM, Arthur Kalmenson wrote:

>
> I don't know the exact numbers. But if I remember correctly, during
> Bruce's presentation, "Faster-than-Possible Code: Deferred Binding
> with GWT" (
> http://sites.google.com/site/io/faster-than-possible-code-deferred-binding-with-gwt
> )
> at Google I/O 2008, he mentioned something about smaller function and
> variable names executing faster then longer names.
>
> Also, as Vitali said, you're code is going to be rather bloated. We
> were accidentally running one of our apps in PRETTY and found the
> before compression size was 3 MB and after compression was 400kb. When
> we changed to OBF, the before compression size was 500kb and
> compressed was somewhere around 120kb.
>
> What's the reason that you want to run it as PRETTY? If you want to
> make the functions callable from regular JS, you should take a look at
> Ray Cromwell's excellent GWT Exporter project:
> http://code.google.com/p/gwt-exporter/
>
> --
> Arthur Kalmenson
>
>
>
> On Sat, Apr 18, 2009 at 1:46 AM, Vitali Lovich  wrote:
> >
> > I believe that it should be the same performance in terms of
> > execution.  You're download times will probably suffer - I wouldn't be
> > surprised if the code bloats by 2-3x if not more.
> >
> > On Fri, Apr 17, 2009 at 11:40 PM, Dobes  wrote:
> >>
> >> I'm considering deploying a version in PRETTY mode since it may solve
> >> a Safari 4 issue I'm having and it would also allow me to interpret
> >> the stack traces produced by Firefox a lot better.
> >>
> >> However, I'm wondering what experiences people have had with the
> >> performance of PRETTY more - how is it?
> >>
> >> Thanks in advance,
> >> Dobes
> >>
> >>
> >> >
> >>
> >
> > >
> >
>
> >
>


-- 

Dobes Vandermeer
Director, Habitsoft Inc.
dob...@habitsoft.com
778-891-2922

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Re: How much slower is PRETTY mode?

[Dobes Vandermeer]

Okay, that's helpful.
Maybe it's worth slowing down the downloads for a while to get some better
insight into some of the errors customers are getting, since it'll allow me
to read the stack traces Firefox includes in the exceptions.


On Sun, Apr 19, 2009 at 1:46 AM, Vitali Lovich  wrote:

>
> I just listened to the talk - didn't hear him say anything regarding
> performance of long name vs short names.
>
> The execution difference for smaller names shouldn't exist for the new
> generation of browsers using JIT for javascript (i.e. FF3.5, Safair 4,
> Chrome).
>
> Even with older browsers, I don't see it being super significant -
> 1-2% at most if it's even measurable.  The execution of the javascript
> code by the interpreter should far outweigh the cost of tokenizing the
> input even if you have a 100 character name.  The cost of doing a 100
> byte memcpy should be insignificant compared to all the other stuff
> the interpreter must do.  However, I could be wrong - I haven't tested
> this in any way, so hard numbers from real-world examples would
> probably be best.
>
> On Sun, Apr 19, 2009 at 12:25 AM, Arthur Kalmenson
>  wrote:
> >
> > I don't know the exact numbers. But if I remember correctly, during
> > Bruce's presentation, "Faster-than-Possible Code: Deferred Binding
> > with GWT" (
> http://sites.google.com/site/io/faster-than-possible-code-deferred-binding-with-gwt
> )
> > at Google I/O 2008, he mentioned something about smaller function and
> > variable names executing faster then longer names.
> >
> > Also, as Vitali said, you're code is going to be rather bloated. We
> > were accidentally running one of our apps in PRETTY and found the
> > before compression size was 3 MB and after compression was 400kb. When
> > we changed to OBF, the before compression size was 500kb and
> > compressed was somewhere around 120kb.
> >
> > What's the reason that you want to run it as PRETTY? If you want to
> > make the functions callable from regular JS, you should take a look at
> > Ray Cromwell's excellent GWT Exporter project:
> > http://code.google.com/p/gwt-exporter/
> >
> > --
> > Arthur Kalmenson
> >
> >
> >
> > On Sat, Apr 18, 2009 at 1:46 AM, Vitali Lovich 
> wrote:
> >>
> >> I believe that it should be the same performance in terms of
> >> execution.  You're download times will probably suffer - I wouldn't be
> >> surprised if the code bloats by 2-3x if not more.
> >>
> >> On Fri, Apr 17, 2009 at 11:40 PM, Dobes  wrote:
> >>>
> >>> I'm considering deploying a version in PRETTY mode since it may solve
> >>> a Safari 4 issue I'm having and it would also allow me to interpret
> >>> the stack traces produced by Firefox a lot better.
> >>>
> >>> However, I'm wondering what experiences people have had with the
> >>> performance of PRETTY more - how is it?
> >>>
> >>> Thanks in advance,
> >>> Dobes
> >>>
> >>>
> >>> >
> >>>
> >>
> >> >
> >>
> >
> > >
> >
>
> >
>


-- 

Dobes Vandermeer
Director, Habitsoft Inc.
dob...@habitsoft.com
778-891-2922

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Re: stateful service

[Dave M]

Thanks for the reply.  I will definitely look at this for
authentication.  Although this doesn't appear to be the full answer to
my question.  Maybe I just don't understand some fundamental piece.  I
am very familiar with java programming but haven't done too much of
the web stuff.  I am used to rmi iiop, and swing/awt thin clients.
The service will be run on the web server.  Whenever I log in for the
first time using this authentication method, I kick off a thread.  I
want to be able to log out and reconnect the next day and gain control
and monitor that same thread (Timertask) that I started the previous
day.  I am guessing since I kicked the thread off in the Impl (service
running on the web server) class, this thread is running inside of the
web server (tomcat).  Do I have to set up a service on the machine
that my Impl class can connect to using rmi or something.  I didn't
want to do this as it adds an extra layer to the connection so I was
hoping to have just the Impl class with a timertask that I can just
control from the web and it maintains state and continues to run.
When I log out, will the thread be garbage collected or can I log back
into the same object running the thread and control/monitor the same
thread?

Thanks again for any reply.

On Sun, Apr 19, 2009 at 6:32 AM, Vitali Lovich  wrote:
> Depends on who initiates the service.  If it's the other machine (not the
> web server), then in general no, unless you run a custom web server on it
> that will convert resource requests (images or JS scripts only) into
> commands (the authentication information will have to be encoded in the
> names in addition to the commands if you have to have authenticated service)
> .  This is quite complicated.
>
> If the web server can control the service, then a simple authenticated RPC
> call will suffice.  Don't bother with cookies if you are using RPC.
> http://code.google.com/p/google-web-toolkit/wiki/RpcAuth
>
> On Sat, Apr 18, 2009 at 11:16 PM, joshmo  wrote:
>>
>> What I want to do is log in to an application.  Once logged in, the
>> user clicks a button to start a service.  Then the user will remain
>> logged in and monitor the service.  The service is used for
>> transferring files a different computer to the computer the web server
>> is running on.  The web page will update every minute with status of
>> server and bandwidth used.  User can log out and log in the next day
>> to the same service and continue to monitor the service.
>>
>> Is this possible? I have been reading about setting a cookie with a
>> session id but I don't know if this is going to work or not.  Does
>> anyone know if you can maintain session state with a service and that
>> service continues to run in a daemon thread even if the user logs out?
>>
>> Thanks for any response.
>>
>>
>
>
> >
>

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Re: List of GWT Open Source Projects?

[Adligo]

Hi,

   I don't know of one, but I think this is a GREAT IDEA!

Here's a list of the stuff I am contributing.

http://cvs.adligo.org/viewvc/
i_util (bootstrap to get code working on j2me, gwt and j2se)
i_log (port of apache commons logging which works on j2me, gwt and
j2se)
adi (registry for j2me, gwt and j2se)
gwt_util (gwt specific bootstrap and a mvc framework)
params (xmlt server side needs sql injection fixes)
adi_gwt_rpc_servlet (serverside rpc specific security)

Cheers,
Scott

On Apr 18, 12:14 pm, William  wrote:
> Does anyone know of a list of GWT Open Source projects?
>
> I've looked on GitHub and Google Code but I'm wondering if there's a
> directory/list maintained somewhere so that it's easy to see
> everything in one place?
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Webservice API for my GWT app running on App Engine

[Gunnar Steinn]

Hi,

I'm trying to create a web service API (REST/JAX-RS/something else) on
App Engine for a desktop client. The client will update data in the
DataStore and a GWT app running there will display the data.

I have "googled" around a lot and haven't found anything that seems to
work.

What do you think is the best solution for me?

BR
Gunnar Steinn

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Re: Webservice API for my GWT app running on App Engine

[Salvador Diaz]

If you want to expose REST services, you light want to look at:
http://wiki.restlet.org/docs_1.2/13-restlet/252-restlet.html

Hope it helps,

Salvador

On Apr 19, 2:47 pm, Gunnar Steinn  wrote:
> Hi,
>
> I'm trying to create a web service API (REST/JAX-RS/something else) on
> App Engine for a desktop client. The client will update data in the
> DataStore and a GWT app running there will display the data.
>
> I have "googled" around a lot and haven't found anything that seems to
> work.
>
> What do you think is the best solution for me?
>
> BR
> Gunnar Steinn
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Re: Linked jar ok but then ClassNotFound at runtime for class from inside the jar?

[William]

Figured it out - runtime classpath problem.

On Apr 19, 5:02 am, Salvador Diaz  wrote:
> Could you post the whole stack trace ?
>
> On Apr 19, 2:48 am, Chris  wrote:
>
> > I added guice.jar to my project which calls various classes in guice.
> > Everything compiled fine. But then when I run it, I get a
> > ClassNotFound for a class in the guice.jar.
>
> > Any ideas why this would be?
>
> > com.google.apphosting.utils.jetty.JettyLogger warn
> > WARNING: failed gwtPostService
> > java.lang.NoClassDefFoundError: com/google/inject/Module
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Upgrade 1.5.3 to 1.6.4 - 404 Error

[Danny Schimke]

Hi!

I've done the upgrade from GWT 1.5.3 to 1.6.4. I followed the
instructions on the GWT docs.Now I get an 404 Warning in my console
"[WARN] 404 - GET /GwtWebapp.html (127.0.0.1) 1400 bytes". And my
hosted- window shows the following:

HTTP ERROR: 404
NOT_FOUND
RequestURI=/GwtWebapp.html

I updated all the things according the docs... Where is the problem, I
have no idea. Hope someone can help

Thanks a lot!
-Danny
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Re: Upgrade 1.5.3 to 1.6.4 - 404 Error

[Salvador Diaz]

I struggled a great deal of time with the same problem, the problem is
with the new hosted mode, it uses a war folder (defaults to
{projectRoot}/war ) and it expects the host html file to sit there.

Put the logLevel to DEBUG or SPAM to get more details about the hosted
mode inner workings.

Hope it helps, and if it doesn't, report back with your project
structure and the arguments you're passing to the hosted mode.

Cheers,

Salvador

On Apr 19, 7:14 pm, Danny Schimke  wrote:
> Hi!
>
> I've done the upgrade from GWT 1.5.3 to 1.6.4. I followed the
> instructions on the GWT docs.Now I get an 404 Warning in my console
> "[WARN] 404 - GET /GwtWebapp.html (127.0.0.1) 1400 bytes". And my
> hosted- window shows the following:
>
> HTTP ERROR: 404
> NOT_FOUND
> RequestURI=/GwtWebapp.html
>
> I updated all the things according the docs... Where is the problem, I
> have no idea. Hope someone can help
>
> Thanks a lot!
> -Danny
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Re: New to app-engine

[vijay]

+GWT users

On Mon, Apr 20, 2009 at 12:14 AM, vijay  wrote:

>
> Hi All,I am planning to use gwt + appengine to develop and deploy my
> website. I am new to both of this though I completed the installation part
> and getting started tutorial of both of this.
> It would be great if you people can give me some tips and other things I
> should be careful about during the development phase. Actually I see a lot
> of help on GWT and appengine individual usage but there is nothing related
> to using gwt with appengine and at this point i am confused if I am missing
> something,
> Isn't using GWT with AppEngine  productive and popular??
>
> Regards,
> Vijay
>

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Re: GWT RPC filter

[Mamadou Alimou DIALLO]

I tried to do that but it's not possible. As doFilter method is overrided,
it can not possible to throw a custom Exception. But please, if you have an
example it will be better for me to send me it.

Thanks in advance
dialloma

2009/4/18 hazy1 

>
> Yes, use the GWT RPC classes to return failure or exception to the
> client in the servlet filter.
>
> On Apr 17, 4:49 am, dialloma  wrote:
> > Hello group,
> >
> > I would like to implement the method or class that will be called
> > before each GWT-RPC. Is there any method in GWT to do that ?
> >
> > I was trying to implement J2EE Filter on GWT server side. But when I
> > throw Exception in my filter throws Exception but my GWT-RPC call
> > return success. Is there any method to force my GWT-RPC call to return
> > onFailure method when I throw exception in my filter.
> > Thanks
> > dialloma
> >
>


-- 
Cordialement,
DIALLO M. Alimou
http://dialloma.blogspot.com/
Cel. 00336 13 39 81 88

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Re: Announcing GWT 1.6...and quite a bit more

[Alex Rudnick]

Hey Salvador,

The plugin team reads this group, so if you just report your bug here,
we'll note it. Maybe start a new thread?

(we'll have documentation about how to report bugs pretty soon too.)

Thanks!

On Sun, Apr 19, 2009 at 10:15 AM, Salvador Diaz  wrote:
>
> Where should we report bugs found in the Eclipse plugin ?
>
> Thanks in advance,
>
> Salvador

-- 
Alex Rudnick
swe, gwt, atl

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Class name in unused code aren't removed ?

[Ed]

Hi all,

I was having a closer look and noticed (I am using gwt 1.5.2 still)
that a variable and field that isn't used, isn't removed by the
compiler if it has the class name as value.

I did a little test with the following code.
The example  class "LabelWidgetFactoryCms" contains the following
fields and method:

private final Logger F_TEST1 =  FactoryLogger.getLogger(this.getClass
().getName() + "TEST1");
private final Logger F_TEST2 =  FactoryLogger.getLogger("TEST2");
private final String F_TEST3 =  "TEST3";
private final Logger F_TEST4 = new Logger(this.getClass().getName() +
"TEST4");
private final Logger F_TEST5 = new Logger("TEST5");
private final String F_TEST6 = this.getClass().getName() + "TEST6";
private final String F_TEST7 = LabelWidgetFactoryCms.class.getName()
+ "TEST";


public Widget createTextWidget(final String key) {
Logger L_TEST1 =  
FactoryLogger.getLogger(this.getClass().getName()
+ "TEST1");
Logger L_TEST2 =  FactoryLogger.getLogger("TEST2");
String L_TEST3 =  "TEST3";
Logger L_TEST4 = new Logger(this.getClass().getName() + 
"TEST4");
Logger L_TEST5 = new Logger("TEST5");
String F_TEST6 = this.getClass().getName() + "TEST6";
String F_TEST7 = LabelWidgetFactoryCms.class.getName() + 
"TEST7";
return createLabelWidget(findContentItem(key));
}

Note:
- FactoryLogger.getLogger(String) simple returns null.
- Neither the fields or the variables aren't used.


The result of compiler with mode PRETTY is the following:

function $LabelWidgetFactoryCms_0(this$static, formatter,
toolTipProvider){
  getLogger(this$static.getClass$().typeName + 'TEST1');
  this$static.getClass$().typeName + 'TEST4';
  this$static.getClass$().typeName + 'TEST6';
  return this$static;
}

...
function $createTextWidget(this$static, key){
  getLogger(this$static.getClass$().typeName + 'TEST1');
  this$static.getClass$().typeName + 'TEST4';
  this$static.getClass$().typeName + 'TEST6';
  return this$static.createLabelWidget($findContentItem_0(this$static,
key));
}
...


Conclusion:
- An unused field isn't removed when it includes the "this" class
name.
- An unused variable isn't removed when it included the "this" class
name.

H interesting especially the difference getClass().getName()
and LabelWidgetFactoryCms.class.getName()
Is this a bug or expected behavior?


-- Ed


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Re: I installed the GEP and now...

[Alex Rudnick]

Ian,

Which jars did you take off the classpath? The errors you're getting
look like the compile step isn't getting the right jars on its cp.

All you should have to do to use the GWT 1.6.2 SDK is set that under
"Google > Web Toolkit" in your project's properties; manually changing
the classpath really shouldn't be necessary.

On Sat, Apr 18, 2009 at 6:30 AM, Ian Bambury  wrote:
> Well, I took the 1.6.4 SDK out since I'm developing and don't want to find
> any nasty surprises. I added 1.6.2 via the GEP, took the jars off the
> classpath and now the compile gives me the errors below. It compiles from
> hosted mode OK
> No doubt there are plans for the future, but I'm wondering how much use the
> plugin would be to me right at the moment even it it were working.
> It's taken a lot of time to get to this point: it wouldn't download, then
> when it finally did, it wouldn't install, and now it's installed it doesn't
> work. That's probably my fault because I don't know what I'm doing, but
> surely if it worked before installing the plugin, it should work with the
> plugin. It's a valid project.
> Why doesn't it assume that I still want to use the version of the SDK that I
> was using before? Why would anyone want to have a different version, which
> might well have methods removed - even between a release candidate being a
> candidate for release and actually being released?
> Anyway, here's the current state of play.
>
> Compiling module com.roughian.rxframework.Module
>    Refreshing module from source
>       Validating newly compiled units
>          Removing units with errors
>             [ERROR] Errors in
> 'file:/D:/work/gwt/workspace/Projects/RXFramework-1.6.1.0/src/com/roughian/rxframework/client/RemoteRequestCallback.java'
>                [ERROR] Line 11: No source code is available for type
> com.google.gwt.json.client.JSONObject; did you forget to inherit a required
> module?
>             [ERROR] Errors in
> 'file:/D:/work/gwt/workspace/Projects/RXFramework-1.6.1.0/src/com/roughian/rxframework/client/RXF.java'
>                [ERROR] Line 73: No source code is available for type
> com.google.gwt.json.client.JSONObject; did you forget to inherit a required
> module?
>                [ERROR] Line 78: No source code is available for type
> com.google.gwt.json.client.JSONValue; did you forget to inherit a required
> module?
>                [ERROR] Line 81: No source code is available for type
> com.google.gwt.json.client.JSONArray; did you forget to inherit a required
> module?
>                [ERROR] Line 111: No source code is available for type
> com.google.gwt.json.client.JSONBoolean; did you forget to inherit a required
> module?
>                [ERROR] Line 124: No source code is available for type
> com.google.gwt.json.client.JSONParser; did you forget to inherit a required
> module?
>                [ERROR] Line 222: No source code is available for type
> com.google.gwt.json.client.JSONNumber; did you forget to inherit a required
> module?
>                [ERROR] Line 250: No source code is available for type
> com.google.gwt.json.client.JSONString; did you forget to inherit a required
> module?
>          Removing invalidated units
>             [WARN] Compilation unit
> 'file:/D:/work/gwt/workspace/Projects/RXFramework-1.6.1.0/src/com/roughian/rxframework/client/RemotePageCallback.java'
> is removed due to invalid reference(s):
>                [WARN]
> file:/D:/work/gwt/workspace/Projects/RXFramework-1.6.1.0/src/com/roughian/rxframework/client/RemoteRequestCallback.java
>                [WARN]
> file:/D:/work/gwt/workspace/Projects/RXFramework-1.6.1.0/src/com/roughian/rxframework/client/RXF.java
>             [WARN] Compilation unit
> 'file:/D:/work/gwt/workspace/Projects/RXFramework-1.6.1.0/src/com/roughian/rxframework/client/RemoteRequestInfoCallback.java'
> is removed due to invalid reference(s):
>                [WARN]
> file:/D:/work/gwt/workspace/Projects/RXFramework-1.6.1.0/src/com/roughian/rxframework/client/RemoteRequestCallback.java
>                [WARN]
> file:/D:/work/gwt/workspace/Projects/RXFramework-1.6.1.0/src/com/roughian/rxframework/client/RXF.java
>             [WARN] Compilation unit
> 'file:/D:/work/gwt/workspace/Projects/RXFramework-1.6.1.0/src/com/roughian/rxframework/client/RemoteRequest.java'
> is removed due to invalid reference(s):
>                [WARN]
> file:/D:/work/gwt/workspace/Projects/RXFramework-1.6.1.0/src/com/roughian/rxframework/client/RemoteRequestCallback.java
>                [WARN]
> file:/D:/work/gwt/workspace/Projects/RXFramework-1.6.1.0/src/com/roughian/rxframework/client/RXF.java
>             [WARN] Compilation unit
> 'file:/D:/work/gwt/workspace/Projects/RXFramework-1.6.1.0/src/com/roughian/rxframework/client/SilentCallback.java'
> is removed due to invalid reference(s):
>                [WARN]
> file:/D:/work/gwt/workspace/Projects/RXFramework-1.6.1.0/src/com/roughian/rxframework/client/RemoteRequestCallback.java
>                [

Re: GWT best Practices - JS Library Wrappers & Overlay Types

[Bobby]

One more for the list:

6. When the original JS library contains one or more classes with
methods that receive functions as parameters, what is the best way to
implement these methods? Should there be a generic Function or
Callback class on the GWT side that is used as the function parameter
type? The function that is passed to the JS method may expect to
receive a different number of parameters itself, so one option is to
define the following class in Java:

public class GenericCallback(){
public void Execute(Object[] Parameters){
   ...
}
}

With this approach the following JavaScript method:

function doSomething(myCallback){}

Would be translated to the following in GWT:

public final native void doSomething(GenericCallback myCallback)/*-{
  var cb = function(a, b, c, d, e){
 var pars = [a,b,c,d,e];//something fancier than this
 var jcb = this.handler;
 @jcb.GenericCallback::Execute([Ljava/lang/Object;)(pars);
  }
  cb.handler = myCallback;//or something like this that actually
works
  this.doSomething(cb);
}-*/

I don't like the idea of joining all the parameters in an array or of
having a function in Java receive an object array, but otherwise there
would need to be multiple Execute methods with a different number of
parameters or even multiple Callback classes in Java, each with its
own particular Execute method. This wouldn't be so difficult if i was
generating the code manually.

Here's a concrete example of what i'm talking about:
http://code.google.com/apis/gdata/jsdoc/1.8/google/gdata/Entry.html

This class has methods that receive function callbacks (for example
deleteEntry). If you were trying to auto generate a GWT wrapper for
that class how would you handle the methods that receive Function
parameters? (assuming that we're using Overlay Types for the
wrapping).

Bobby

On Apr 18, 4:24 pm, Bobby  wrote:
> I'm in the process of trying to dynamically generate a GWT wrapper for
> an existing JS library and i have a few questions which come down to
> best practices for the most part.
>
> 1. When wrapping a JS library with GWT, is it recommended to leave the
> namespaces intact? If the JS library and the GWT wrapper library have
> the same namespaces, is there a chance of a conflict where GWT code
> will overwrite the original namespaces of the JS library? (i don't
> think this is the case but i wanted to verify)
>
> 2. If the JS library that's being wrapped around has classes that may
> need to be constructed from the Java side, then are Overlay Types
> automatically out of the question (in which case plain Java wrapper
> classes would be used) or is it better to still use Overlay Types and
> just expose factory methods for doing the job of the constructors?
>
> 3. If the original JS library has classes where fields are commonly
> accessed directly, as opposed to via getters and setters, then is it
> recommended to remain faithful to the original JS library and expose
> the fields without getters/setters (in which case Overlay Types are
> out of the picture) or ignore this aspect of the original JS library
> and expose getters/setters instead.
>
> 4. If the original JS library has a method that has optional
> parameters, for example, myFunc(a, b) where b may be undefined, should
> a single Java method be added, or should multiple overloaded methods
> be used? For example:
> myFunc(a)
> myFunc(a, b)
>
> 5. Should constants be automatically converted to enumerations or
> should they just be left alone?
>
> If you have some insight on these questions (or any others i missed) i
> would really welcome your input.
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Re: New to app-engine

[Salvador Diaz]

> > Isn't using GWT with AppEngine  productive and popular??

Productive yes, popular I don't think so, as AppEngine has only been
available for a couple of weeks.

> It would be great if you people can give me some tips and other things I
> should be careful about during the development phase

You should read all of the docs very carefully, normally that'll give
you enough guidance. If you encounter any particular problems, ask
here or at the app engine discussion group.

Cheers,

Salvador

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Third party classes

[venk]

Hello all -

I will caveat this post by saying that I am new to GWT and relatively
new to web applications/java, having spent most of my programming
hours in a MS environment (most notably C#). But, I am having the
darnedest time trying to figure out how to do one thing.

I have a .jar of compiled classes (sorry, don't know the right
terminology) that was provided by a vendor, i.e. there is little
chance I will get the original source or get a jar with the source
included. I would like to write a "hybrid" google-based app that
allows the user to use the classes in that file (assume it is
installed locally on all user machines) but also is deployed using the
google app engine.

I am open to any way in which this can be accomplished. I have thought
I could have a "heavy" desktop-type app that does the interaction with
the vendor classes in the GAE/GWT framework, but that is proving
difficult. I am using the eclipse IDE with the google plugins. I also
thought maybe I could write a google desktop gadget using GWT to do
the local interaction.

Am I going to be forced to write a local server that serves the
responses to requests for interacting with my vendor classes. Ugh.
Surely there is a better way?

Thanks to all.

-- V

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Memory Leak in IE7

[mike177]

Hello,
We have built a very large, complex GWT site and it works great in FF,
Chrome, and Safari (and with limited testing we seem to be ok in IE8
too).  IE7, though, is hit or miss.  I originally thought that our
performance issues were all being caused by IE7's poor JS engine, but
I have started to believe that we have a memory leak issue too.  After
upgrading to GWT 1.6 to see if there was anything there that would fix
the problem, I did some testing and found the following results:

IE7
When performing heavy tasks:
* CPU usage :  95-100% (will stick for 10 to 20 seconds sometimes),
* RAM usage :  55% to 70% (most of the time).
* the one trait that is not stereotypical of a memory leak, though, is
that our site does not progressively get worse ultimately resulting in
the browser freezing.  Instead, it gets bad quickly (after 1-2 minutes
of use) and then stays at this poor level until you quit the site.  Go
figure???

All Other Browsers
When performing heavy tasks
* CPU usage : 50-75%
* RAM usage :  < 50%

So, we seem to have most of the stereotypical indicators of a leak in
IE7 and unfortunately we will have to live with IE7 for another couple
years (not to mention IE6).

Does anyone have any thoughts on how to find, isolate, and fix memory
leaks specific to IE7 in GWT code?

Below are some of the resources I have dug up.  I did not have much
luck looking for GWT specific information so I am leveraging whatever
I can find.

Many thanks for your thoughts and opinions.

Regards,
Mike

--

While these artcles not GWT specific, lots of information can be
gleaned from them:
* http://www.codeproject.com/KB/scripting/leakpatterns.aspx
* http://msdn.microsoft.com/en-us/library/bb250448.aspx

There is a JS memory leak detector for IE here:
* http://blogs.msdn.com/gpde/pages/javascript-memory-leak-detector.aspx
Of course, this just confirms that you have a leak, which we do.
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Re: Class name in unused code aren't removed ?

[Vitali Lovich]

I'm not sure if it's a missed optimization, but it seems the compiler
cannot optimize away getClass() for some reason.  If you do
LabelWidgetFactoryCms.class, then it'll optimize it away properly.  I
just checked & this behaviour is present in trunk as well:

public void onModuleLoad() {
   String nothing = this.getClass().getName() + "TEST";
}

In the compiled output, we see

function init(){
  !!$stats && $stats({moduleName:$moduleName, subSystem:'startup',
evtGroup:'moduleStartup', millis:(new Date()).getTime(),
type:'onModuleLoadStart', className:'org.gwt.client.Sample'});
  ($Sample(new Sample()) , Lorg_gwt_client_Sample_2_classLit).typeName + 'TEST';
}

but only if I have
private final GreetingServiceAsync greetingService =
GWT.create(GreetingService.class);

declared as a field.  This problem also appears with OBF.

The problem appears to be that the compiler misses the optimization
On Sun, Apr 19, 2009 at 4:02 PM, Ed  wrote:
>
> Hi all,
>
> I was having a closer look and noticed (I am using gwt 1.5.2 still)
> that a variable and field that isn't used, isn't removed by the
> compiler if it has the class name as value.
>
> I did a little test with the following code.
> The example  class "LabelWidgetFactoryCms" contains the following
> fields and method:
> 
>        private final Logger F_TEST1 =  FactoryLogger.getLogger(this.getClass
> ().getName() + "TEST1");
>        private final Logger F_TEST2 =  FactoryLogger.getLogger("TEST2");
>        private final String F_TEST3 =  "TEST3";
>        private final Logger F_TEST4 = new Logger(this.getClass().getName() +
> "TEST4");
>        private final Logger F_TEST5 = new Logger("TEST5");
>        private final String F_TEST6 = this.getClass().getName() + "TEST6";
>        private final String F_TEST7 = LabelWidgetFactoryCms.class.getName()
> + "TEST";
>
>
>        public Widget createTextWidget(final String key) {
>                Logger L_TEST1 =  
> FactoryLogger.getLogger(this.getClass().getName()
> + "TEST1");
>                Logger L_TEST2 =  FactoryLogger.getLogger("TEST2");
>                String L_TEST3 =  "TEST3";
>                Logger L_TEST4 = new Logger(this.getClass().getName() + 
> "TEST4");
>                Logger L_TEST5 = new Logger("TEST5");
>                String F_TEST6 = this.getClass().getName() + "TEST6";
>                String F_TEST7 = LabelWidgetFactoryCms.class.getName() + 
> "TEST7";
>                return createLabelWidget(findContentItem(key));
>        }
> 
> Note:
> - FactoryLogger.getLogger(String) simple returns null.
> - Neither the fields or the variables aren't used.
>
>
> The result of compiler with mode PRETTY is the following:
> 
> function $LabelWidgetFactoryCms_0(this$static, formatter,
> toolTipProvider){
>  getLogger(this$static.getClass$().typeName + 'TEST1');
>  this$static.getClass$().typeName + 'TEST4';
>  this$static.getClass$().typeName + 'TEST6';
>  return this$static;
> }
>
> ...
> function $createTextWidget(this$static, key){
>  getLogger(this$static.getClass$().typeName + 'TEST1');
>  this$static.getClass$().typeName + 'TEST4';
>  this$static.getClass$().typeName + 'TEST6';
>  return this$static.createLabelWidget($findContentItem_0(this$static,
> key));
> }
> ...
> 
>
> Conclusion:
> - An unused field isn't removed when it includes the "this" class
> name.
> - An unused variable isn't removed when it included the "this" class
> name.
>
> H interesting especially the difference getClass().getName()
> and LabelWidgetFactoryCms.class.getName()
> Is this a bug or expected behavior?
>
>
> -- Ed
>
>
> >

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Re: Memory Leak in IE7

[Vitali Lovich]

You contradict yourself.  A memory leak by definition does not display a
constant memory usage - *the* defining characteristic is that memory used
keeps increasing.  What you are describing is heavy memory usage & it is
consistent across browsers.

Thus you have a problem with your application - either it actually does need
that much memory, or you are doing some caching of objects somewhere and
never freeing that cache.

Without the code for your app or even knowing what it does, all I can
recommend is you first use Firebug to profile your code to find the heavy
CPU usage to track down what exactly is causing it - that might help you
find where you have heavy memory usage.

There's also the $199 tool that claims to be able to profile your JS memory
usage for you (I've never used it & couldn't find any free alternatives
http://www.softwareverify.com/javascript/memory/index.html)

There's a free tool for IE memory leak detection (
http://www.outofhanwell.com/ieleak/index.php?title=Main_Page) but that
probably won't help you as what you have described is not a leak.

On Sun, Apr 19, 2009 at 6:20 PM, mike177  wrote:
>
> Hello,
> We have built a very large, complex GWT site and it works great in FF,
> Chrome, and Safari (and with limited testing we seem to be ok in IE8
> too).  IE7, though, is hit or miss.  I originally thought that our
> performance issues were all being caused by IE7's poor JS engine, but
> I have started to believe that we have a memory leak issue too.  After
> upgrading to GWT 1.6 to see if there was anything there that would fix
> the problem, I did some testing and found the following results:
>
> IE7
> When performing heavy tasks:
> * CPU usage :  95-100% (will stick for 10 to 20 seconds sometimes),
> * RAM usage :  55% to 70% (most of the time).
> * the one trait that is not stereotypical of a memory leak, though, is
> that our site does not progressively get worse ultimately resulting in
> the browser freezing.  Instead, it gets bad quickly (after 1-2 minutes
> of use) and then stays at this poor level until you quit the site.  Go
> figure???
>
> All Other Browsers
> When performing heavy tasks
> * CPU usage : 50-75%
> * RAM usage :  < 50%
>
> So, we seem to have most of the stereotypical indicators of a leak in
> IE7 and unfortunately we will have to live with IE7 for another couple
> years (not to mention IE6).
>
> Does anyone have any thoughts on how to find, isolate, and fix memory
> leaks specific to IE7 in GWT code?
>
> Below are some of the resources I have dug up.  I did not have much
> luck looking for GWT specific information so I am leveraging whatever
> I can find.
>
> Many thanks for your thoughts and opinions.
>
> Regards,
> Mike
>
> --
>
> While these artcles not GWT specific, lots of information can be
> gleaned from them:
> * http://www.codeproject.com/KB/scripting/leakpatterns.aspx
> * http://msdn.microsoft.com/en-us/library/bb250448.aspx
>
> There is a JS memory leak detector for IE here:
> * http://blogs.msdn.com/gpde/pages/javascript-memory-leak-detector.aspx
> Of course, this just confirms that you have a leak, which we do.
> >
>

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Re: GWT best Practices - JS Library Wrappers & Overlay Types

[Thomas Broyer]

On 18 avr, 22:24, Bobby  wrote:
> I'm in the process of trying to dynamically generate a GWT wrapper for
> an existing JS library and i have a few questions which come down to
> best practices for the most part.
>
> 1. When wrapping a JS library with GWT, is it recommended to leave the
> namespaces intact? If the JS library and the GWT wrapper library have
> the same namespaces, is there a chance of a conflict where GWT code
> will overwrite the original namespaces of the JS library? (i don't
> think this is the case but i wanted to verify)

There's no notion of "namespaces" in the Javascript code resulting
from GWT compilation (actually, there's no notion of "namespaces" in
JavaScript either, at all, but that's just a problem of vocabulary).
Even when compiling in -style PRETTY or DETAILED, GWT shouldn't
override/shadow any JavaScript variable defined outside the GWT code
(everything's initialized in a closure to not polute the global scope,
and in JSNI you should use $wnd.XXX to access a variable called XXX
defined in the global namespace, so...)

> 2. If the JS library that's being wrapped around has classes that may
> need to be constructed from the Java side, then are Overlay Types
> automatically out of the question (in which case plain Java wrapper
> classes would be used) or is it better to still use Overlay Types and
> just expose factory methods for doing the job of the constructors?

Overlay types have no overhead, at all, compared to wrapper classes,
so prefer overlay types and static factory methods.

> 3. If the original JS library has classes where fields are commonly
> accessed directly, as opposed to via getters and setters, then is it
> recommended to remain faithful to the original JS library and expose
> the fields without getters/setters (in which case Overlay Types are
> out of the picture) or ignore this aspect of the original JS library
> and expose getters/setters instead.

See answer to 2; yes, use getters/setters in Java overlay types, I
repeat: there's no overhead implied!

> 4. If the original JS library has a method that has optional
> parameters, for example, myFunc(a, b) where b may be undefined, should
> a single Java method be added, or should multiple overloaded methods
> be used? For example:
> myFunc(a)
> myFunc(a, b)

You can use overloads.

> 5. Should constants be automatically converted to enumerations or
> should they just be left alone?

As you like. There are many ways to map JS constants to GWT Java; all
imply an overhead, except if you hard-code the constant value as a
constant Java field, or if you provide a static getter method that
returns the JS constant using JSNI.

> If you have some insight on these questions (or any others i missed) i
> would really welcome your input.


On 19 avr, 22:42, Bobby  wrote:
> One more for the list:
>
> 6. When the original JS library contains one or more classes with
> methods that receive functions as parameters, what is the best way to
> implement these methods? Should there be a generic Function or
> Callback class on the GWT side that is used as the function parameter
> type?

Functions are not a first-class citizen in Java, so you have to use
interfaces or abstract classes or... and in your JSNI code, pass a
function as the argument that will call back the... callback ;-)

I wouldn't use a generic Callback interface though. One of the
advantages of working with Java is static typing: if you use specific
interfaces, your IDE will flag an error if you pass an erroneous such
callback instance as an argument to a method (and now that the Google
Plugin for Eclipse checks the JSNI code as well and allows for
autocompletion there, there really is not reason not to do it; apart
for the fear of the overhead implied by adding such an interface --
very minor, compared to the number of classes implementing those
interfaces, and probably quickly overweighted by the additional checks
that you'd have to make in your callback instances)

> The function that is passed to the JS method may expect to
> receive a different number of parameters itself, so one option is to
> define the following class in Java:
>
> public class GenericCallback(){
> public void Execute(Object[] Parameters){
>...
> }
>
> }
>
> With this approach the following JavaScript method:
>
> function doSomething(myCallback){}
>
> Would be translated to the following in GWT:
>
> public final native void doSomething(GenericCallback myCallback)/*-{
>   var cb = function(a, b, c, d, e){
>  var pars = [a,b,c,d,e];//something fancier than this
>  var jcb = this.handler;
>  @jcb.GenericCallback::Execute([Ljava/lang/Object;)(pars);
>   }
>   cb.handler = myCallback;//or something like this that actually
> works
>   this.doSomething(cb);
>
> }-*/

public final native void doSomething(GenericCallback myCallback)/*-{
var that = this;
this.doSomething(function(a, b, c, d, e) {
@jcb.MyClass::doSome

Re: How much slower is PRETTY mode?

[John Gunther]

A while back I was doing some performance tests and my recollection
was, for that application, in FF2, it was something like 10% slower in
PRETTY. This was with GWT 1.4. Not a lot, but just enough that I
decided not to performance test in PRETTY.

(The big performance impact in FF2 is if Firebug is completely
disabled or not. Firebug must be completely disabled (via Tools/
Addons) with a FF restart to get the real numbers (plus just about
everything looks like it has a memory leak with Firebug on))

John

On Apr 19, 10:20 am, Dobes Vandermeer  wrote:
> Okay, that's helpful.
> Maybe it's worth slowing down the downloads for a while to get some better
> insight into some of the errors customers are getting, since it'll allow me
> to read the stack traces Firefox includes in the exceptions.
>
>
>
> On Sun, Apr 19, 2009 at 1:46 AM, Vitali Lovich  wrote:
>
> > I just listened to the talk - didn't hear him say anything regarding
> > performance of long name vs short names.
>
> > The execution difference for smaller names shouldn't exist for the new
> > generation of browsers using JIT for javascript (i.e. FF3.5, Safair 4,
> > Chrome).
>
> > Even with older browsers, I don't see it being super significant -
> > 1-2% at most if it's even measurable.  The execution of the javascript
> > code by the interpreter should far outweigh the cost of tokenizing the
> > input even if you have a 100 character name.  The cost of doing a 100
> > byte memcpy should be insignificant compared to all the other stuff
> > the interpreter must do.  However, I could be wrong - I haven't tested
> > this in any way, so hard numbers from real-world examples would
> > probably be best.
>
> > On Sun, Apr 19, 2009 at 12:25 AM, Arthur Kalmenson
> >  wrote:
>
> > > I don't know the exact numbers. But if I remember correctly, during
> > > Bruce's presentation, "Faster-than-Possible Code: Deferred Binding
> > > with GWT" (
> >http://sites.google.com/site/io/faster-than-possible-code-deferred-bi...
> > )
> > > at Google I/O 2008, he mentioned something about smaller function and
> > > variable names executing faster then longer names.
>
> > > Also, as Vitali said, you're code is going to be rather bloated. We
> > > were accidentally running one of our apps in PRETTY and found the
> > > before compression size was 3 MB and after compression was 400kb. When
> > > we changed to OBF, the before compression size was 500kb and
> > > compressed was somewhere around 120kb.
>
> > > What's the reason that you want to run it as PRETTY? If you want to
> > > make the functions callable from regular JS, you should take a look at
> > > Ray Cromwell's excellent GWT Exporter project:
> > >http://code.google.com/p/gwt-exporter/
>
> > > --
> > > Arthur Kalmenson
>
> > > On Sat, Apr 18, 2009 at 1:46 AM, Vitali Lovich 
> > wrote:
>
> > >> I believe that it should be the same performance in terms of
> > >> execution.  You're download times will probably suffer - I wouldn't be
> > >> surprised if the code bloats by 2-3x if not more.
>
> > >> On Fri, Apr 17, 2009 at 11:40 PM, Dobes  wrote:
>
> > >>> I'm considering deploying a version in PRETTY mode since it may solve
> > >>> a Safari 4 issue I'm having and it would also allow me to interpret
> > >>> the stack traces produced by Firefox a lot better.
>
> > >>> However, I'm wondering what experiences people have had with the
> > >>> performance of PRETTY more - how is it?
>
> > >>> Thanks in advance,
> > >>> Dobes
>
> --
>
> Dobes Vandermeer
> Director, Habitsoft Inc.
> dob...@habitsoft.com
> 778-891-2922
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Re: Easiest way to package a library with optional features requiring a sub-library?

[Thomas Broyer]

On 18 avr, 07:42, John Gunther  wrote:
> Thanks for the great info, sorry I didn't see your reply till now.
>
> I think your first idea would not work in my case because I would have
> to have code that referenced the optional module even if they didn't
> use it (there are "if (usingOptionModule) do this by invoking its
> methods otherwise do something else" kinds of constructs in there) So
> they would always have to include the module anyway, or the compiler
> would complain about the method invocations not being defined?

Right.

> I've never used deferred binding before (except what GWT does
> automatically) but had begun to read up on it (Hanson and Tacy's GWT
> in Action and Dewsbury's Google Web Toolkit Applications both cover
> it) after making my post. Your set-property variant seems like it
> would be the nicest for users. I've never compiled anything that had
> multiple variants (say for different browsers) but where I only had
> selected a single one of them...I've always just let GWT crank out all
> the various permutations. The compiler won't complain that the code
> for actually implementing the "value=true" option isn't available if I
> only actually use the "value=false" setting?

It won't.

> It just grabs the replace-
> with I actually selected for and ignores the other ones..does not
> attempt to verify that my module is "correct" regardless of the
> specific property setting some specific user may have selected?

No, it only compiles (and checks) what you tell it to compile. (maybe
the -validateOnly would do it, but wouldn't bet on it)

> BUT...how can it know before it gets used which properties will be
> specified, so it seems that it must check that all the code for any
> permutation is available, since a module that has a true option and
> associated replace-withs has to provide the code to implement that
> option, too, since someone might use it with true.

If you call the compiler, it means you're compiling an application, so
checking other permutations would be useless (woudl take time without
any impact on the output; would you like the compiler throwing an
error for something you're actually not compiling?). The compiler
doesn't know about "libraries".

> That implies I
> somehow have to physically bundle the optional module with my module,

No.

> So what I am leaning towards now is defining an ordinary Java
> interface ("IOptionalLibraryObjectFactory") that creates instances of
> the optional library's objects that users of the optional library must
> implement (I tried this, and it does work). If they don't implement
> it, there are no refs to the optional library and I compile without
> error. Problem with this approach (at least the way I've tried it) is
> users end up having to add a good deal of boilerplate Java code to use
> the optional library.

Try the deferred-binding way and judge by yourself ;-)

> If you check out chapter 10 of Google Web Toolkit Applications there
> is an example there that maybe would do everything I'd need, but it
> involves actually generating the said boilerplate automatically via
> putting stuff in the rebind folder, "generate-with" clauses, etc. and
> that just seemed like too much work...if it's that hard maybe wiser to
> make the users of my library paste in their own boilerplate and
> concentrate on just making it easy for them to grab that boilerplate?

Using simple replace-with deferred bindings as I proposed is much
simpler and less error-prone thatn generating code that's probably not
needed...
(just replace your if(useOptionalModule) structures with 2 classes
(the one using the useOptionalModule could eventually inherit the
other) and a replace-with rule; if the class to be split is public,
refactor to use a "helper" internal class and split that one, so that
your users won't have to use GWT.create())
For best performances, your internal helper classes should be
singletons (private static class, instantiated once only in a private
static final field); the compiler should then inline the helper's
methods and your helper's class won't exist at all in the compiled JS.
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Re: GWT best Practices - JS Library Wrappers & Overlay Types

[Bobby]

Thomas, thanks for the reply that's what i wanted to hear for
questions 1, 2, 3 and 4.

While i have your attention, on #5 and constants Vs enumerations - I
won't know the value of the constants at the time of generating the
wrapper (i think that even if i did i would still rather not have them
hard coded in the wrapper class). This means that i can't have JS
constants become static final fields in the Java class. I guess in the
worst case i could have a single JSNI method for retrieving the value
of a given constant, given the name, or one JSNI method per constant,
but Enums would be much more developer friendly.

Just to put things into context, here's a class that defines some
constants:
http://code.google.com/apis/gdata/jsdoc/1.8/google/gdata/Im.html

Right now, using enums, this is the GWT wrapper that the generator
would yield:

[code]
package google.gdata;
public class Im extends com.google.gwt.core.client.JavaScriptObject {
public final native String getAddress() /*-{ return this.getAddress
(); }-*/;
public final native String getLabel() /*-{ return this.getLabel(); }-
*/;
public final native boolean getPrimary() /*-{ return this.getPrimary
(); }-*/;
public final native String getProtocol() /*-{ return this.getProtocol
(); }-*/;
public final native String getRel() /*-{ return this.getRel(); }-*/;
public final native void setAddress(String address) /*-{ return
this.setAddress(address); }-*/;
public final native void setLabel(String label) /*-{ return
this.setLabel(label); }-*/;
public final native void setPrimary(boolean primary) /*-{ return
this.setPrimary(primary); }-*/;
public final native void setProtocol(String protocol) /*-{ return
this.setProtocol(protocol); }-*/;
public final native void setRel(String rel) /*-{ return this.setRel
(rel); }-*/;

public static enum Constants {
PROTOCOL_AIM ("PROTOCOL_AIM"),
PROTOCOL_GOOGLE_TALK ("PROTOCOL_GOOGLE_TALK"),
PROTOCOL_ICQ ("PROTOCOL_ICQ"),
PROTOCOL_JABBER ("PROTOCOL_JABBER"),
PROTOCOL_MSN ("PROTOCOL_MSN"),
PROTOCOL_QQ ("PROTOCOL_QQ"),
PROTOCOL_SKYPE ("PROTOCOL_SKYPE"),
PROTOCOL_YAHOO ("PROTOCOL_YAHOO"),
REL_HOME ("REL_HOME"),
REL_OTHER ("REL_OTHER"),
REL_WORK ("REL_WORK");
private final String name;
Constants(String name) {
this.name = name;
}
public String value(){ return getConstantValue(this.name); }
private static native String getConstantValue(String name) /*-
{ return google.gdata.Im[name]; }-*/;
}
}
[/code]

So the class would have an inner enumeration that retrieves the values
via JSNI. Right now i have now idea if this works because i don't know
how GWT handles enums, let alone inner enums in an overlay type.

For #6 and Callbacks, i agree that interfaces are much more developer
friendly, but these would be difficult to dynamically generate (for
example, what would the generator name the interface, whould it reuse
interfaces across different methods?). I don't have to auto-generate
100% of the code, in the end there may always be some manual editing,
but it's a pity.
Right now (without constants) 90% of the generated wrapper for
Google.GData compiles, the callbacks are the missing 10%.

Bobby

On Apr 19, 7:07 pm, Thomas Broyer  wrote:
> On 18 avr, 22:24, Bobby  wrote:
>
> > I'm in the process of trying to dynamically generate a GWT wrapper for
> > an existing JS library and i have a few questions which come down to
> > best practices for the most part.
>
> > 1. When wrapping a JS library with GWT, is it recommended to leave the
> > namespaces intact? If the JS library and the GWT wrapper library have
> > the same namespaces, is there a chance of a conflict where GWT code
> > will overwrite the original namespaces of the JS library? (i don't
> > think this is the case but i wanted to verify)
>
> There's no notion of "namespaces" in the Javascript code resulting
> from GWT compilation (actually, there's no notion of "namespaces" in
> JavaScript either, at all, but that's just a problem of vocabulary).
> Even when compiling in -style PRETTY or DETAILED, GWT shouldn't
> override/shadow any JavaScript variable defined outside the GWT code
> (everything's initialized in a closure to not polute the global scope,
> and in JSNI you should use $wnd.XXX to access a variable called XXX
> defined in the global namespace, so...)
>
> > 2. If the JS library that's being wrapped around has classes that may
> > need to be constructed from the Java side, then are Overlay Types
> > automatically out of the question (in which case plain Java wrapper
> > classes would be used) or is it better to still use Overlay Types and
> > just expose factory methods for doing the job of the constructors?
>
> Overlay types have no ov

Re: How much slower is PRETTY mode?

[Vitali Lovich]

So wait, even with Firebug disabled in FF2 you saw a 10% hit?

On Sun, Apr 19, 2009 at 7:44 PM, John Gunther
wrote:

>
> A while back I was doing some performance tests and my recollection
> was, for that application, in FF2, it was something like 10% slower in
> PRETTY. This was with GWT 1.4. Not a lot, but just enough that I
> decided not to performance test in PRETTY.
>
> (The big performance impact in FF2 is if Firebug is completely
> disabled or not. Firebug must be completely disabled (via Tools/
> Addons) with a FF restart to get the real numbers (plus just about
> everything looks like it has a memory leak with Firebug on))
>
> John
>
> On Apr 19, 10:20 am, Dobes Vandermeer  wrote:
> > Okay, that's helpful.
> > Maybe it's worth slowing down the downloads for a while to get some
> better
> > insight into some of the errors customers are getting, since it'll allow
> me
> > to read the stack traces Firefox includes in the exceptions.
> >
> >
> >
> > On Sun, Apr 19, 2009 at 1:46 AM, Vitali Lovich 
> wrote:
> >
> > > I just listened to the talk - didn't hear him say anything regarding
> > > performance of long name vs short names.
> >
> > > The execution difference for smaller names shouldn't exist for the new
> > > generation of browsers using JIT for javascript (i.e. FF3.5, Safair 4,
> > > Chrome).
> >
> > > Even with older browsers, I don't see it being super significant -
> > > 1-2% at most if it's even measurable.  The execution of the javascript
> > > code by the interpreter should far outweigh the cost of tokenizing the
> > > input even if you have a 100 character name.  The cost of doing a 100
> > > byte memcpy should be insignificant compared to all the other stuff
> > > the interpreter must do.  However, I could be wrong - I haven't tested
> > > this in any way, so hard numbers from real-world examples would
> > > probably be best.
> >
> > > On Sun, Apr 19, 2009 at 12:25 AM, Arthur Kalmenson
> > >  wrote:
> >
> > > > I don't know the exact numbers. But if I remember correctly, during
> > > > Bruce's presentation, "Faster-than-Possible Code: Deferred Binding
> > > > with GWT" (
> > >http://sites.google.com/site/io/faster-than-possible-code-deferred-bi.
> ..
> > > )
> > > > at Google I/O 2008, he mentioned something about smaller function and
> > > > variable names executing faster then longer names.
> >
> > > > Also, as Vitali said, you're code is going to be rather bloated. We
> > > > were accidentally running one of our apps in PRETTY and found the
> > > > before compression size was 3 MB and after compression was 400kb.
> When
> > > > we changed to OBF, the before compression size was 500kb and
> > > > compressed was somewhere around 120kb.
> >
> > > > What's the reason that you want to run it as PRETTY? If you want to
> > > > make the functions callable from regular JS, you should take a look
> at
> > > > Ray Cromwell's excellent GWT Exporter project:
> > > >http://code.google.com/p/gwt-exporter/
> >
> > > > --
> > > > Arthur Kalmenson
> >
> > > > On Sat, Apr 18, 2009 at 1:46 AM, Vitali Lovich 
> > > wrote:
> >
> > > >> I believe that it should be the same performance in terms of
> > > >> execution.  You're download times will probably suffer - I wouldn't
> be
> > > >> surprised if the code bloats by 2-3x if not more.
> >
> > > >> On Fri, Apr 17, 2009 at 11:40 PM, Dobes  wrote:
> >
> > > >>> I'm considering deploying a version in PRETTY mode since it may
> solve
> > > >>> a Safari 4 issue I'm having and it would also allow me to interpret
> > > >>> the stack traces produced by Firefox a lot better.
> >
> > > >>> However, I'm wondering what experiences people have had with the
> > > >>> performance of PRETTY more - how is it?
> >
> > > >>> Thanks in advance,
> > > >>> Dobes
> >
> > --
> >
> > Dobes Vandermeer
> > Director, Habitsoft Inc.
> > dob...@habitsoft.com
> > 778-891-2922
> >
>

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Re: GWT best Practices - JS Library Wrappers & Overlay Types

[Thomas Broyer]

On 20 avr, 01:47, Bobby  wrote:
>
> While i have your attention, on #5 and constants Vs enumerations - I
> won't know the value of the constants at the time of generating the
> wrapper (i think that even if i did i would still rather not have them
> hard coded in the wrapper class). This means that i can't have JS
> constants become static final fields in the Java class. I guess in the
> worst case i could have a single JSNI method for retrieving the value
> of a given constant, given the name, or one JSNI method per constant,
> but Enums would be much more developer friendly.

There has been some news recently about enums in GWT:
http://code.google.com/p/google-web-toolkit/wiki/EnumOptimizations
http://timepedia.blogspot.com/2009/04/gwts-type-system-is-more-powerful-than.html

> Just to put things into context, here's a class that defines some
> constants:http://code.google.com/apis/gdata/jsdoc/1.8/google/gdata/Im.html
>
> Right now, using enums, this is the GWT wrapper that the generator
> would yield:
>
> [code]
> package google.gdata;
> public class Im extends com.google.gwt.core.client.JavaScriptObject {
>         public final native String getAddress() /*-{ return this.getAddress
> (); }-*/;

Er, shouldn't it instead be:
public final native String getAddress() /*-{ return this.address; }-
*/;

>         public final native String getLabel() /*-{ return this.getLabel(); }-
> */;
>         public final native boolean getPrimary() /*-{ return this.getPrimary
> (); }-*/;
>         public final native String getProtocol() /*-{ return this.getProtocol
> (); }-*/;
>         public final native String getRel() /*-{ return this.getRel(); }-*/;
>         public final native void setAddress(String address) /*-{ return
> this.setAddress(address); }-*/;

This "return" is not necessary.

>         public final native void setLabel(String label) /*-{ return
> this.setLabel(label); }-*/;
>         public final native void setPrimary(boolean primary) /*-{ return
> this.setPrimary(primary); }-*/;
>         public final native void setProtocol(String protocol) /*-{ return
> this.setProtocol(protocol); }-*/;
>         public final native void setRel(String rel) /*-{ return this.setRel
> (rel); }-*/;
>
>         public static enum Constants {
>                 PROTOCOL_AIM ("PROTOCOL_AIM"),
>                 PROTOCOL_GOOGLE_TALK ("PROTOCOL_GOOGLE_TALK"),
>                 PROTOCOL_ICQ ("PROTOCOL_ICQ"),
>                 PROTOCOL_JABBER ("PROTOCOL_JABBER"),
>                 PROTOCOL_MSN ("PROTOCOL_MSN"),
>                 PROTOCOL_QQ ("PROTOCOL_QQ"),
>                 PROTOCOL_SKYPE ("PROTOCOL_SKYPE"),
>                 PROTOCOL_YAHOO ("PROTOCOL_YAHOO"),
>                 REL_HOME ("REL_HOME"),
>                 REL_OTHER ("REL_OTHER"),
>                 REL_WORK ("REL_WORK");
>             private final String name;
>             Constants(String name) {
>                 this.name = name;
>             }
> public String value(){ return getConstantValue(this.name); }

If the enum's "value" is the same, I'd rather not use this private
field, and instead use name():
public String value() { return getConstantValue(this.name()); }

You could also probably initialize a static map (or at least keep a
reference to the google.gdata.Im object) for slight better perfs:

private static final jso;

static {
   jso = initJso();
}
private static native JavaScriptObject initJso() /*-{ return
google.gdata.Im; }-*/;

private static native String getConstantValue(JavaScriptObject map,
String name) /*-{
return map[name];
}-*/;

> So the class would have an inner enumeration that retrieves the values
> via JSNI. Right now i have now idea if this works because i don't know
> how GWT handles enums, let alone inner enums in an overlay type.

I'm almost sure it would work.

In this particlar case, I wouldn't use an enum though, as these
constants are only "sample values" (common values). And I would use
"true Java constants" too.
(FYI, the GData Java Client use constants for these:
http://code.google.com/intl/fr-FR/apis/gdata/javadoc/com/google/gdata/data/extensions/Im.html
)

An example using an enum:
http://code.google.com/p/gwt-in-the-air/source/browse/trunk/src/net/ltgt/gwt/air/core/client/html/HTMLLoader.java
http://code.google.com/p/gwt-in-the-air/source/browse/trunk/src/net/ltgt/gwt/air/core/client/html/HTMLPDFCapability.java

An example using "just constants":
http://code.google.com/p/gwt-in-the-air/source/browse/trunk/src/net/ltgt/gwt/air/core/client/events/Event.java

> For #6 and Callbacks, i agree that interfaces are much more developer
> friendly, but these would be difficult to dynamically generate (for
> example, what would the generator name the interface, whould it reuse
> interfaces across different methods?).

After a quick scan of the GData Java client API, there doesn't seem to
be much callbacks, so in the JS API most if not all callbacks should
be due to its async nature, thus are likely to be a pair of

what's wrong here?

[Alex Luya]

No exception,no output,that is strange
-
package com.tsolution.crm.client;

public class Model
{
   private String desc;
  
public String getDesc()
{
return desc;
}
public void setDesc(String desc)
{
this.desc = desc;
}

}

-
.
public void onModuleLoad()
{
Model m1 = new Model();
m1.setDesc("Hello");
  
AsyncCallback callback=new AsyncCallback(){
public void onFailure(Throwable caught)
{
}

public void onSuccess(String result)
{
Window.alert(result);
}
};
   
ArrayList modelList=new ArrayList();
modelList.add(m1);
  
loginService.greetServer(modelList, callback);
}


--
package com.tsolution.crm.client;

import java.util.ArrayList;
import com.google.gwt.user.client.rpc.RemoteService;
import com.google.gwt.user.client.rpc.RemoteServiceRelativePath;


@RemoteServiceRelativePath("greet")
public interface GreetingService extends RemoteService {
  String greetServer(ArrayList modelList);
  String greetServer1(String modelList);
}
---
package com.tsolution.crm.client;
import java.util.ArrayList;
import com.google.gwt.user.client.rpc.AsyncCallback;

public interface GreetingServiceAsync {
  void greetServer(ArrayList modelList, AsyncCallback 
callback);
}
-
package com.tsolution.crm.server;

import java.util.ArrayList;
import com.tsolution.crm.client.GreetingService;
import com.tsolution.crm.client.Model;
import com.google.gwt.user.server.rpc.RemoteServiceServlet;

public class GreetingServiceImpl extends RemoteServiceServlet implements
GreetingService
{

public String greetServer(ArrayList modelList)
{
return modelList.get(0).getDesc();
}
 
}


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Is it possible to resize the viewport of the Image

[Yifan]

If I have the following code:

image = new Image(url);
image.setVisibleRect( a, b, c, d);

is it possible that I can resize the area to 2c X 2d which will
enlarge the picture in the viewport?

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Re: GWT best Practices - JS Library Wrappers & Overlay Types

[Bobby]

Thomas, In your reply above you were asking if i shouldn't instead
have:
public final native String getAddress() /*-{ return this.address; }-

Not really because the GData JS library uses getters/setters (which is
nice) so the getAddress method exists on the JS side:
http://code.google.com/apis/gdata/jsdoc/1.8/google/gdata/Im.html#getAddress

I wasn't aware that "return" wasn't necessary (though it makes sense),
this is why i ask stuff.

On constants vs enumerations, ok if constants are good enough for the
Java GData library then they're good enough for me - it saves me the
work of trying to plug the enumeration types into the method
parameters and return values. I'm going to follow the same approach as
in the following link that you provided:
http://code.google.com/p/gwt-in-the-air/source/browse/trunk/src/net/ltgt/gwt/air/core/client/events/Event.java

AsyncCallback seems like a good fit, i counted three classes in the JS
GData library (out of 238) that use callbacks:
http://code.google.com/apis/gdata/jsdoc/1.8/google/gdata/Feed.html
http://code.google.com/apis/gdata/jsdoc/1.8/google/accounts/user.html
http://code.google.com/apis/gdata/jsdoc/1.8/google/gdata/Entry.html

The Feed and Entry classes always have a pair of callbacks for success
and failure, the User class uses single onSuccess callbacks - the
onFailure method of the AsyncCallback would never be called, not a
major issue, i'm going to assume that the JS method never fails (else
it would have an error handler).

I'm not entirely sure yet how to implement this with AsyncCallback.
For example, for the getSelf method of google.gdata.Entry (http://
code.google.com/apis/gdata/jsdoc/1.8/google/gdata/Entry.html#getSelf)
i could do the following:
JS
function getSelf( continuation, 
opt_errorHandler)

Java
public final native Entry getSelf( continuation,
 opt_errorHandler)/*-{
//it gets difficult here
var cbw1 = { cb: continuation, call: function(o)
{ @this.cb.AsyncCallback::onSuccess(Ljava/lang/Object;)(o); } }
var cbw2 = { cb: opt_errorHandler, call: function(e)
{ @this.cb.AsyncCallback::onFailure(Lcustom/gdata/aux/FailureError;)
(e); } }
return this.getSelf(cbw1.call, cbw2.call);
}-*/

One unknown here on my part is the JNI notation for generics (http://
java.sun.com/j2se/1.4.2/docs/guide/jni/spec/types.html#wp16432), i'm
assuming that it's no different than non-generics and that we still
use "L fully-qualified-class ;".

Also in my JSNI code above for getSelf, i see that it would fail if
the original GData JS Entry.getSelf implementation does the following:
Entry.prototype.getSelf = function(continuation, opt_errorHandler){
  this.success_cb = continuation;
  this.failure_cb = opt_errorHandler;
  //do something
}

Because then then the "cb" property that the "call" method references
won't be available. Maybe there's some neat JS trick that i can use to
prevent this but i don't know what it is, unless i store the success
and failure callbacks in global vars (which doesn't excite me).

Bobby

On Apr 19, 8:26 pm, Thomas Broyer  wrote:
> On 20 avr, 01:47, Bobby  wrote:
>
>
>
> > While i have your attention, on #5 and constants Vs enumerations - I
> > won't know the value of the constants at the time of generating the
> > wrapper (i think that even if i did i would still rather not have them
> > hard coded in the wrapper class). This means that i can't have JS
> > constants become static final fields in the Java class. I guess in the
> > worst case i could have a single JSNI method for retrieving the value
> > of a given constant, given the name, or one JSNI method per constant,
> > but Enums would be much more developer friendly.
>
> There has been some news recently about enums in 
> GWT:http://code.google.com/p/google-web-toolkit/wiki/EnumOptimizationshttp://timepedia.blogspot.com/2009/04/gwts-type-system-is-more-powerf...
>
> > Just to put things into context, here's a class that defines some
> > constants:http://code.google.com/apis/gdata/jsdoc/1.8/google/gdata/Im.html
>
> > Right now, using enums, this is the GWT wrapper that the generator
> > would yield:
>
> > [code]
> > package google.gdata;
> > public class Im extends com.google.gwt.core.client.JavaScriptObject {
> >         public final native String getAddress() /*-{ return this.getAddress
> > (); }-*/;
>
> Er, shouldn't it instead be:
> public final native String getAddress() /*-{ return this.address; }-
> */;
>
> >         public final native String getLabel() /*-{ return this.getLabel(); 
> > }-
> > */;
> >         public final native boolean getPrimary() /*-{ return this.getPrimary
> > (); }-*/;
> >         public final native String getProtocol() /*-{ return 
> > this.getProtocol
> > (); }-*/;
> >         public final native String getRel() /*-{ return this.getRel(); }-*/;
> >         public final native void setAddress(String address) /*-{ return
> > this.setAddress(address); }-*/;
>
> This "return" is not necessary.
>
>
>
>
>
> > 

Re: Is it possible to resize the viewport of the Image

[Vitali Lovich]

image.setPixelSize(2*c, 2*d + "px").  I'm not sure how if that does or does
not interfere with visible rect - you'll have to test that out.

On Sun, Apr 19, 2009 at 6:56 PM, Yifan  wrote:

>
> If I have the following code:
>
> image = new Image(url);
> image.setVisibleRect( a, b, c, d);
>
> is it possible that I can resize the area to 2c X 2d which will
> enlarge the picture in the viewport?
>
> >
>

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Re: How much slower is PRETTY mode?

[Dobes Vandermeer]

I've turned PRETTY on and one thing I have noticed is that it increases my
compile times by about 20%-25% - from 430 seconds to ~ 570, which sucks.
 But I guess 7 minutes to 9 isn't that bad - once I passed the 5 minute mark
I leaned to go surf the web while I wait .. :-/

On Sun, Apr 19, 2009 at 4:54 PM, Vitali Lovich  wrote:

> So wait, even with Firebug disabled in FF2 you saw a 10% hit?
>
>
> On Sun, Apr 19, 2009 at 7:44 PM, John Gunther  > wrote:
>
>>
>> A while back I was doing some performance tests and my recollection
>> was, for that application, in FF2, it was something like 10% slower in
>> PRETTY. This was with GWT 1.4. Not a lot, but just enough that I
>> decided not to performance test in PRETTY.
>>
>> (The big performance impact in FF2 is if Firebug is completely
>> disabled or not. Firebug must be completely disabled (via Tools/
>> Addons) with a FF restart to get the real numbers (plus just about
>> everything looks like it has a memory leak with Firebug on))
>>
>> John
>>
>> On Apr 19, 10:20 am, Dobes Vandermeer  wrote:
>> > Okay, that's helpful.
>> > Maybe it's worth slowing down the downloads for a while to get some
>> better
>> > insight into some of the errors customers are getting, since it'll allow
>> me
>> > to read the stack traces Firefox includes in the exceptions.
>> >
>> >
>> >
>> > On Sun, Apr 19, 2009 at 1:46 AM, Vitali Lovich 
>> wrote:
>> >
>> > > I just listened to the talk - didn't hear him say anything regarding
>> > > performance of long name vs short names.
>> >
>> > > The execution difference for smaller names shouldn't exist for the new
>> > > generation of browsers using JIT for javascript (i.e. FF3.5, Safair 4,
>> > > Chrome).
>> >
>> > > Even with older browsers, I don't see it being super significant -
>> > > 1-2% at most if it's even measurable.  The execution of the javascript
>> > > code by the interpreter should far outweigh the cost of tokenizing the
>> > > input even if you have a 100 character name.  The cost of doing a 100
>> > > byte memcpy should be insignificant compared to all the other stuff
>> > > the interpreter must do.  However, I could be wrong - I haven't tested
>> > > this in any way, so hard numbers from real-world examples would
>> > > probably be best.
>> >
>> > > On Sun, Apr 19, 2009 at 12:25 AM, Arthur Kalmenson
>> > >  wrote:
>> >
>> > > > I don't know the exact numbers. But if I remember correctly, during
>> > > > Bruce's presentation, "Faster-than-Possible Code: Deferred Binding
>> > > > with GWT" (
>> > >http://sites.google.com/site/io/faster-than-possible-code-deferred-bi.
>> ..
>> > > )
>> > > > at Google I/O 2008, he mentioned something about smaller function
>> and
>> > > > variable names executing faster then longer names.
>> >
>> > > > Also, as Vitali said, you're code is going to be rather bloated. We
>> > > > were accidentally running one of our apps in PRETTY and found the
>> > > > before compression size was 3 MB and after compression was 400kb.
>> When
>> > > > we changed to OBF, the before compression size was 500kb and
>> > > > compressed was somewhere around 120kb.
>> >
>> > > > What's the reason that you want to run it as PRETTY? If you want to
>> > > > make the functions callable from regular JS, you should take a look
>> at
>> > > > Ray Cromwell's excellent GWT Exporter project:
>> > > >http://code.google.com/p/gwt-exporter/
>> >
>> > > > --
>> > > > Arthur Kalmenson
>> >
>> > > > On Sat, Apr 18, 2009 at 1:46 AM, Vitali Lovich 
>> > > wrote:
>> >
>> > > >> I believe that it should be the same performance in terms of
>> > > >> execution.  You're download times will probably suffer - I wouldn't
>> be
>> > > >> surprised if the code bloats by 2-3x if not more.
>> >
>> > > >> On Fri, Apr 17, 2009 at 11:40 PM, Dobes  wrote:
>> >
>> > > >>> I'm considering deploying a version in PRETTY mode since it may
>> solve
>> > > >>> a Safari 4 issue I'm having and it would also allow me to
>> interpret
>> > > >>> the stack traces produced by Firefox a lot better.
>> >
>> > > >>> However, I'm wondering what experiences people have had with the
>> > > >>> performance of PRETTY more - how is it?
>> >
>> > > >>> Thanks in advance,
>> > > >>> Dobes
>> >
>> > --
>> >
>> > Dobes Vandermeer
>> > Director, Habitsoft Inc.
>> > dob...@habitsoft.com
>> > 778-891-2922
>>
>>
>
> >
>


-- 

Dobes Vandermeer
Director, Habitsoft Inc.
dob...@habitsoft.com
778-891-2922

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FastTree and loading animation

[markmac]

Hi All,

Does anyone know how I can get the FastTree to show a loading tree
icon when a user expands a tree node? I was hoping to get this for
free out of the box, but it does not seem to be available.

Any help at all is appreciated.

Cheers,
Mark
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Increasing job market demand for GWT?

[rob]

My impression from job boards is that demand for GWT is increasing in
the job market.

http://www.indeed.com/jobtrends?q=gwt&l=

Does anyone believe this is inaccurate?

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Re: How much slower is PRETTY mode?

[Arthur Kalmenson]

> I just listened to the talk - didn't hear him say anything regarding
> performance of long name vs short names.

Oops, guess it wasn't that one, although that presentation did rock
:P. I watched it a year ago, so my memory is rather vague there.

> Even with older browsers, I don't see it being super significant -
> 1-2% at most if it's even measurable.  The execution of the javascript
> code by the interpreter should far outweigh the cost of tokenizing the
> input even if you have a 100 character name.  The cost of doing a 100
> byte memcpy should be insignificant compared to all the other stuff
> the interpreter must do.  However, I could be wrong - I haven't tested
> this in any way, so hard numbers from real-world examples would
> probably be best.

That's true, but any performance gain is good. Anyway, the main
disadvantage of going with PRETTY is that your application ends up
being larger so the initial start up is slower.

--
Arthur Kalmenson



On Sun, Apr 19, 2009 at 4:46 AM, Vitali Lovich  wrote:
>
> I just listened to the talk - didn't hear him say anything regarding
> performance of long name vs short names.
>
> The execution difference for smaller names shouldn't exist for the new
> generation of browsers using JIT for javascript (i.e. FF3.5, Safair 4,
> Chrome).
>
> Even with older browsers, I don't see it being super significant -
> 1-2% at most if it's even measurable.  The execution of the javascript
> code by the interpreter should far outweigh the cost of tokenizing the
> input even if you have a 100 character name.  The cost of doing a 100
> byte memcpy should be insignificant compared to all the other stuff
> the interpreter must do.  However, I could be wrong - I haven't tested
> this in any way, so hard numbers from real-world examples would
> probably be best.
>
> On Sun, Apr 19, 2009 at 12:25 AM, Arthur Kalmenson
>  wrote:
>>
>> I don't know the exact numbers. But if I remember correctly, during
>> Bruce's presentation, "Faster-than-Possible Code: Deferred Binding
>> with GWT" 
>> (http://sites.google.com/site/io/faster-than-possible-code-deferred-binding-with-gwt)
>> at Google I/O 2008, he mentioned something about smaller function and
>> variable names executing faster then longer names.
>>
>> Also, as Vitali said, you're code is going to be rather bloated. We
>> were accidentally running one of our apps in PRETTY and found the
>> before compression size was 3 MB and after compression was 400kb. When
>> we changed to OBF, the before compression size was 500kb and
>> compressed was somewhere around 120kb.
>>
>> What's the reason that you want to run it as PRETTY? If you want to
>> make the functions callable from regular JS, you should take a look at
>> Ray Cromwell's excellent GWT Exporter project:
>> http://code.google.com/p/gwt-exporter/
>>
>> --
>> Arthur Kalmenson
>>
>>
>>
>> On Sat, Apr 18, 2009 at 1:46 AM, Vitali Lovich  wrote:
>>>
>>> I believe that it should be the same performance in terms of
>>> execution.  You're download times will probably suffer - I wouldn't be
>>> surprised if the code bloats by 2-3x if not more.
>>>
>>> On Fri, Apr 17, 2009 at 11:40 PM, Dobes  wrote:

 I'm considering deploying a version in PRETTY mode since it may solve
 a Safari 4 issue I'm having and it would also allow me to interpret
 the stack traces produced by Firefox a lot better.

 However, I'm wondering what experiences people have had with the
 performance of PRETTY more - how is it?

 Thanks in advance,
 Dobes


 >

>>>
>>> >
>>>
>>
>> >
>>
>
> >
>

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html convert to gwt

[asianCoolz]

any tool that can be used to convert html (div tag) into gwt codes ? I
am wondering fast way to convert div codes with css into gwt easily
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Re: Does GWT 1.6 break in Safari 4?

[Jason Essington]

In Safari 4 I get a javascript error:
 SyntaxError: Expression too deep

Not sure what that is about, but maybe you can compile with -pretty  
and step into it with webinspector?

-jason

On Apr 17, 2009, at 9:39 PM, Dobes Vandermeer wrote:

>
> I just tried it myself and it is in fact not working for our app.  I
> guess it's something just between my app and Safari 4, though, if
> nobody else is having this issue.
>
> You can see it for yourself : http://www.clarityaccounting.com/demo
> and launch the demo.  Works in Firefox 3 but not Safari 4.
>
> A bit more investigation reveals that I'm hitting this problem in
> Safari 4 that was previously reported for WebKit in Adobe AIR:
>
> http://code.google.com/p/google-web-toolkit/issues/detail?id=3455
>
>
> On Apr 17, 8:34 am, Jason Essington  wrote:
>> I've been using GWT (both 1.5.3 and 1.6.4) with Safari 4, and haven't
>> noticed any issues.
>>
>> -jason
>> On Apr 16, 2009, at 5:42 PM, Dobes wrote:
>>
>>
>>
>>> A customer of ours reported that last week (before we uploaded a new
>>> version based on GWT 1.6) he could use our app in Safari 4 beta, but
>>> this week the app never finishes loading.  Has anyone else noticed
>>> problems showing up with Safari 4 beta in GWT 1.6 that were not  
>>> there
>>> in GWT 1.5 ?
> >


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Using History, navigation bw pages

[mrfreeze81]

I am creating an app, navigating from one page to another using
history. I have a main.html page and I have a div="mainpanel" as a
place holder for my GWT panel. My panel has the core features of the
app, some HTML content, etc. When I navigate from one page to another
I use

Rootpanel.get("mainpanel").clear();
Rootpanel.get("mainpanel").add(new NextPanel());

This panel has it's own Html content. When I do a view source, all I
get is mail.html's source.

How do I code such that web bots can pick up the content on my site?
Or how can they (when my site is being searched) look for keywords in
my site to return a search result?

Thanks

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How to call/response/load Widget from normal Sevlet(Not RPC based)?

[Arun]

Hi,

I am developing an application where i came across a situation and now
looking for the solution.

Application Discription:

I developing an application which contains two pages,

1. SubmitDataWidget
It contains two Textboxes, a FileUpload widget and a Button. On click
to button i am going to a servlet and passing data through servlet
(Here i am not using GWT-RPC as it is not supporting file transfering)

2 LoadTreeWidget
   once the process of servlet finish i have go to second page, which
would load a dynamic tree.
   I have created a widget which is performing this task, It is using
GWT-RPC.

In general JSP/Servlet/Struts applications we have Response forward/
sendredirect methods which we use from servlet.

My confusion/delima in this application:

How i should call/response the second widget(LoadTreeWidget) from the
servlet once servlet finsh it's process?

Thanks in advance for your suggestion

Arun.
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Re: Does GWT 1.6 break in Safari 4?

[Dobes Vandermeer]

Yeah, it's a reported for Adobe AIR and GWT previously, now Safari 4 Beta is
doing the same thing.  Apparently compiling with PRETTY fixes it, but of
course we'd prefer not to deploy the app with PRETTY since the initial
download is so much bigger.

On Sun, Apr 19, 2009 at 9:17 PM, Jason Essington
wrote:

>
> In Safari 4 I get a javascript error:
> SyntaxError: Expression too deep
>
> Not sure what that is about, but maybe you can compile with -pretty
> and step into it with webinspector?
>
> -jason
>
> On Apr 17, 2009, at 9:39 PM, Dobes Vandermeer wrote:
>
> >
> > I just tried it myself and it is in fact not working for our app.  I
> > guess it's something just between my app and Safari 4, though, if
> > nobody else is having this issue.
> >
> > You can see it for yourself : http://www.clarityaccounting.com/demo
> > and launch the demo.  Works in Firefox 3 but not Safari 4.
> >
> > A bit more investigation reveals that I'm hitting this problem in
> > Safari 4 that was previously reported for WebKit in Adobe AIR:
> >
> > http://code.google.com/p/google-web-toolkit/issues/detail?id=3455
> >
> >
> > On Apr 17, 8:34 am, Jason Essington  wrote:
> >> I've been using GWT (both 1.5.3 and 1.6.4) with Safari 4, and haven't
> >> noticed any issues.
> >>
> >> -jason
> >> On Apr 16, 2009, at 5:42 PM, Dobes wrote:
> >>
> >>
> >>
> >>> A customer of ours reported that last week (before we uploaded a new
> >>> version based on GWT 1.6) he could use our app in Safari 4 beta, but
> >>> this week the app never finishes loading.  Has anyone else noticed
> >>> problems showing up with Safari 4 beta in GWT 1.6 that were not
> >>> there
> >>> in GWT 1.5 ?
> > >
>
>
> >
>


-- 

Dobes Vandermeer
Director, Habitsoft Inc.
dob...@habitsoft.com
778-891-2922

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Re: what's wrong here?

[Alex Luya]

That is it,Sorry,I forgot it .
Vagner Araujo a écrit :
> Hi friends,
>
> try now.
>
>
> package com.tsolution.crm.client;
>
> import java.io.Serializable;
>
>
> public class Model implements Serializable {
>
>   private static final long serialVersionUID = 5693662550097196303L;
>
>   private String desc;
>
>   public String getDesc() {
>   return desc;
>   }//end getDesc
>
>   public void setDesc(String desc) {
>   this.desc = desc;
>   }//end setDesc
>
> }//end class
>
>
> //SERVICE CLASS
>
> package com.tsolution.crm.client;
>
> import java.util.ArrayList;
> import com.google.gwt.user.client.rpc.RemoteService;
> import com.google.gwt.user.client.rpc.RemoteServiceRelativePath;
>
>
> @RemoteServiceRelativePath("greet")
> public interface GreetingService extends RemoteService {
>  String greetServer(ArrayList modelList);
>  String greetServer1(String modelList);
> }//end interface
>
>
> package com.tsolution.crm.client;
> import java.util.ArrayList;
> import com.google.gwt.user.client.rpc.AsyncCallback;
>
> public interface GreetingServiceAsync {
>
>   void greetServer(ArrayList modelList, AsyncCallback
>   callback);
>
>   void greetServer1(String modelList, AsyncCallback
> asyncCallback);
> }//end interface
>
>
>
> package com.tsolution.crm.server;
>
> import java.util.ArrayList;
> import com.tsolution.crm.client.GreetingService;
> import com.tsolution.crm.client.Model;
> import com.google.gwt.user.server.rpc.RemoteServiceServlet;
>
> public class GreetingServiceImpl extends RemoteServiceServlet
> implements
> GreetingService {
>
>   private static final long serialVersionUID = 1L;
>
>   @Override
>   public String greetServer(ArrayList modelList) {
>   return modelList.get(0).getDesc();
>   }//end greetServer(ArrayList modelList)
>
>   @Override
>   public String greetServer1(String modelList) {
>   return null;
>   }//end greetServer1(String modelList)
> }//end class
>
>
> public void onModuleLoad() {
>
>   GreetingServiceAsync greetingServiceAsync = GWT
>   .create(GreetingService.class);
>
>   Model m1 = new Model();
>   m1.setDesc("Hello");
>
>   AsyncCallback callback = new AsyncCallback() {
>   public void onFailure(Throwable caught) {
>   }
>
>   public void onSuccess(String result) {
>   Window.alert(result);
>   }
>   };
>
>   ArrayList modelList = new ArrayList();
>   modelList.add(m1);
>
>   greetingServiceAsync.greetServer(modelList, callback);
>
> }//end onModuleLoad
>
>
> Vagner Araujo
> Java + Vagner = Javagner
> >
>
>   


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Re: send request data to php with requestbuilder

[Ikon]

I am very sorry, it was my fault. I had a little trouble with caching
and the pages didn't refresh as I expected them to.  As a newbe to GWT
I was a bit desperate of not seeing the compiled pages to update. So
this error is a false positive, sorry for that! :(

On Apr 19, 10:30 am, Salvador Diaz  wrote:
> What do you mean "they won't work now" ?
>
>  Do you have errors we can look at so we can diagnose the problem ? Or
> some sort of analysis of your own ? Have you inspected the requests
> being sent by your GWT client with firebug ? It can tell you if the
> request is fine so you can be sure that it's not a GWT problem.
>
> Also, make sure that you understand the limitations introduced by the
> Same Origin Policy when trying to communicate with a backend different
> than plain GWT RPC's
>
> Cheers,
>
> Salvador
>
> On Apr 18, 4:27 pm, Ikon  wrote:
>
> > I am trying to send some string to a php file and a request data:
>
> > req_builder.sendRequest("test_key=test_value", new RequestCallback()
> > {...
>
> > and I wish to access the test_value like $_REQUEST['test_key'] in php.
> > Later i wish to send multiple query variables too. I wish to send
> > parameters to give it to sql queries.
> > I have tried to set the header to setHeader("Content-Type",
> > "application/x-www-form-urlencoded"), but that won't help either. I am
> > getting empty $_REQUEST array.
>
> > I wish to receive some working example for GWT 1.6.
> > I know there are some 2-3 year examples out there in this group, but
> > they won't work now.
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Automatic logout feature

[Mark]

Hi All;

I earlier requested help in regard tothe above subject but i have
waited in vain.

I am new to GWT and I am working on a data critical application where
security is imperative.

I want to implement an automatic logout feature if the application
does not receive activity for n - minutes

Help out

Mark
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Re: New to app-engine

[vijay]

Thanks everyone for your replies, I think the situation is more clear to me
now.

On Mon, Apr 20, 2009 at 2:35 AM, Salvador Diaz wrote:

>
> > > Isn't using GWT with AppEngine  productive and popular??
>
> Productive yes, popular I don't think so, as AppEngine has only been
> available for a couple of weeks.
>
> > It would be great if you people can give me some tips and other things I
> > should be careful about during the development phase
>
> You should read all of the docs very carefully, normally that'll give
> you enough guidance. If you encounter any particular problems, ask
> here or at the app engine discussion group.
>
> Cheers,
>
> Salvador
>
> >
>

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Making a call to more than one server

[AnaLena]

Hi, I'm just starting out with GWT and making my way through the
various tutorials on the subject.

My issue:
Can I make a call to a different server than just my native one with
the classes/language gwt provides? For example, I interact normally
with my server, but want to ask a different server for the time or
current stock values. Or even want to poll more than one server with
the methods I have written in GWT (for example to collect data for a
statistical analysis, server A has this much traffic, server B has
this much traffic).

Is that even possible in GWT or will I have to write javascript code
to make connections to multiple servers? All examples and documention
I found so far seems to assume communication with only one server.

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Re: Making a call to more than one server

[AnaLena]

Sorry for the newbie question. After a lot of searching I finally got
sent in the right direction. I assume RequestBuilder is what I want?
http://google-web-toolkit.googlecode.com/svn/javadoc/1.6/com/google/gwt/http/client/RequestBuilder.html
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Re: Making a call to more than one server

[Salvador Diaz]

Unfortunately, you're limited by the same origin policy:
https://developer.mozilla.org/En/Same_origin_policy_for_JavaScript

There are techniques to bypass it though but if you have a server
backend, your best bet is to make the calls to the other server there.

Cheers,

Salvador

On Apr 20, 7:53 am, AnaLena  wrote:
> Sorry for the newbie question. After a lot of searching I finally got
> sent in the right direction. I assume RequestBuilder is what I 
> want?http://google-web-toolkit.googlecode.com/svn/javadoc/1.6/com/google/g...
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Re: Third party classes

[Salvador Diaz]

> Am I going to be forced to write a local server that serves the
> responses to requests for interacting with my vendor classes. Ugh.

Yes you're going to have to write server-side code, no you don't have
to write a local server, jetty, tomcat, winstone (which is only ~150kB
by the way) or any other servlet container will do

> Surely there is a better way?

I don't think so, short of finding an equivalent library tailored
specifically ot be used as client-side GWT code

Cheers,

Salvador

On Apr 19, 11:39 pm, venk  wrote:
> Hello all -
>
> I will caveat this post by saying that I am new to GWT and relatively
> new to web applications/java, having spent most of my programming
> hours in a MS environment (most notably C#). But, I am having the
> darnedest time trying to figure out how to do one thing.
>
> I have a .jar of compiled classes (sorry, don't know the right
> terminology) that was provided by a vendor, i.e. there is little
> chance I will get the original source or get a jar with the source
> included. I would like to write a "hybrid" google-based app that
> allows the user to use the classes in that file (assume it is
> installed locally on all user machines) but also is deployed using the
> google app engine.
>
> I am open to any way in which this can be accomplished. I have thought
> I could have a "heavy" desktop-type app that does the interaction with
> the vendor classes in the GAE/GWT framework, but that is proving
> difficult. I am using the eclipse IDE with the google plugins. I also
> thought maybe I could write a google desktop gadget using GWT to do
> the local interaction.
>
> Am I going to be forced to write a local server that serves the
> responses to requests for interacting with my vendor classes. Ugh.
> Surely there is a better way?
>
> Thanks to all.
>
> -- V
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Re: FastTree and loading animation

[Salvador Diaz]

Well, depending on what you're going to show, you might not need to
show the loading icon. But if you really want to do it, you should be
able to add a TreeItem created from a widget so make your loading icon
with a standard image widget, then instantiate your fast tree item
with that image, add it to your tree and when you're ready to show the
actual data, remove the loading icon and show the data.

http://collectionofdemos.appspot.com/javadoc/com/google/gwt/widgetideas/client/FastTreeItem.html#FastTreeItem(com.google.gwt.user.client.ui.Widget)

Cheers,

Salvador

On Apr 20, 4:29 am, markmac  wrote:
> Hi All,
>
> Does anyone know how I can get the FastTree to show a loading tree
> icon when a user expands a tree node? I was hoping to get this for
> free out of the box, but it does not seem to be available.
>
> Any help at all is appreciated.
>
> Cheers,
> Mark
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Re: Using History, navigation bw pages

[Salvador Diaz]

http://groups.google.com/group/Google-Web-Toolkit/browse_thread/thread/2a64865292e12276

On Apr 20, 6:25 am, mrfreeze81  wrote:
> I am creating an app, navigating from one page to another using
> history. I have a main.html page and I have a div="mainpanel" as a
> place holder for my GWT panel. My panel has the core features of the
> app, some HTML content, etc. When I navigate from one page to another
> I use
>
> Rootpanel.get("mainpanel").clear();
> Rootpanel.get("mainpanel").add(new NextPanel());
>
> This panel has it's own Html content. When I do a view source, all I
> get is mail.html's source.
>
> How do I code such that web bots can pick up the content on my site?
> Or how can they (when my site is being searched) look for keywords in
> my site to return a search result?
>
> Thanks
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Re: How to call/response/load Widget from normal Sevlet(Not RPC based)?

[Salvador Diaz]

I have a proof-of-concept which shows upload/download functionality in
a gwt application. Here's the servlet:
http://code.google.com/p/hellagwt/source/browse/trunk/hellagwt/src/main/java/fr/salvadordiaz/gwt/hellagwt/server/NzbUpload.java

You'll have to add a FormHandler (I think in 1.6 there are 2 separate
handlers for this, but the principle is the same) to wait for the
response of the upload servlet and then call the viexchange from
there, have a look at the code from ly upload view:
http://code.google.com/p/hellagwt/source/browse/trunk/hellagwt/src/main/java/fr/salvadordiaz/gwt/hellagwt/client/views/UploadPanel.java

Hope it helps,

Salvador

On Apr 20, 6:28 am, Arun  wrote:
> Hi,
>
> I am developing an application where i came across a situation and now
> looking for the solution.
>
> Application Discription:
>
> I developing an application which contains two pages,
>
> 1. SubmitDataWidget
> It contains two Textboxes, a FileUpload widget and a Button. On click
> to button i am going to a servlet and passing data through servlet
> (Here i am not using GWT-RPC as it is not supporting file transfering)
>
> 2 LoadTreeWidget
>    once the process of servlet finish i have go to second page, which
> would load a dynamic tree.
>    I have created a widget which is performing this task, It is using
> GWT-RPC.
>
> In general JSP/Servlet/Struts applications we have Response forward/
> sendredirect methods which we use from servlet.
>
> My confusion/delima in this application:
>
> How i should call/response the second widget(LoadTreeWidget) from the
> servlet once servlet finsh it's process?
>
> Thanks in advance for your suggestion
>
> Arun.
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