Re: [NEWBIE QUESTION] Multiple ways of styling GWT application. Which one to choose?

[Thomas Broyer]

On Sunday, July 20, 2014 1:11:05 PM UTC+2, Adrian Leśniak wrote:
>
> Hi everyone, 
>
> I have just started with GWT and came across this dilemma. Well, I am 
> aware of a several ways to styling the app, however I find it hard to 
> figure out which technique I should choose, which will conform to the 
> current standards. I thought, since I have experience in CSS and HTML, I 
> could do all the styling in *.css files, but is it how GWT wants me to do 
> it? I am just looking to pros and cons of the methods of styling.
>

https://plus.google.com/116255824545489210730/posts/a1yywEjAfVd contains 
bits of an answer.
As for CssResource/GssResource  vs. an "external" stylesheet, 
CssResource/GssResource brings minification and obfuscation (so you don't 
have to think about how to name things to make sure there won't be naming 
conflicts), and a bit of "type safety" (by matching class names to Java 
interface methods, so you'll never make a typo in a class name and later 
wonder why your style is not applied)

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Re: Newbie question: best practices for view update from Composite

[Juan Pablo Gardella]

Take a look to Activities and Places.


2014-02-05 DT79 :

> Hi everyone,
>
> I apologize for the "stupid" question buy I'm new to GWT.
>
> I have a single page application composed with some nested custom widgets
> (composites).
> I need, from a Composite, to change the main view (i. e. updating the
> widgets in the entry point class).
> Which is the recommended way or the best practice to do that?
> Should I use event bus?
>
> Thanks in advance.
>
> D.
>
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Re: Newbie Question

[Juan Pablo Gardella]

Use https://github.com/tbroyer/gwt-maven-archetypes to start an empty
project.


2013/11/19 Andrew Smith 

> Hi
>
> I recently created a GWT starter application, which contains 3 modules,
> client, server and shared. It was a simple app with a greeting service,
> built using the gwt-maven-plugin. All went well, but then when I tried to
> incorporate mvp, using views and activities, it made me change the the
> shared module into a gwt module. At least that's the only way it would
> build. I also want to incorporate GIN, and providers in further modules.
>
> Does anyone know why I had to use a GWT module. And what's the best source
> of info for my learning curve please.
>
> Many Thanks
>
> Andy
>
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Re: newbie question: what return type to use for TextBox?

[Jens]

I don't know mvp4g but what you describe is pretty normal. If you expose 
your widget as feature interfaces you would need to add a method per 
feature like:

Focusable getNameFocusable();
HasText getNameHasText();

Technically you can define more interfaces as "return value" by using 
generics:

 T getTextBox() {
  return (T) textbox; *//unchecked cast!*
}

which will allow you to access methods from both interfaces when calling 
view.getTextBox().someMethod() but I dont recommend it because the 
downsides are:
- you don't get a compile time error if textbox does not implement the 
interfaces T extends from because its an unchecked cast to T.
- you don't get a compile time error if you assign the return type to 
something different like HasEnabled enabled = view.getTextBox(). You could 
even write something like Person p = view.getTextBox() which is plain 
wrong. Also because of the unchecked cast to T.

So I tend to not use feature interfaces in my views. Instead of 
view.getNameTextBox().get/setText(String) I simply use 
view.get/setName(String). Its shorter, more meaningful and you dont have to 
struggle with a good name for a HasXYZ getter method (adding the widget 
class name or the feature interface name to the getter method name seems 
silly and something like view.getName().getText() also looks kind of silly 
to me). If I need to make the name focusable I would add 
view.setNameFocused(boolean). So yes, I would add a new method to the view, 
like you would add a new getter now.
In some cases I push the model class to the view like view.display(person) 
/ view.getPerson(). This allows you to implement some minor logic into the 
view and can help to keep the presenter a bit more cleaner. Some people 
dont like it because the view knows about the model but I am fine with it 
as it can be more practical.
For events I also dont use feature interfaces (e.g. HasClickHandlers). I 
define my own Delegate interface that contains event callback methods, like 
"onNameChanged", and then call view.setDelegate(delegate). This works 
pretty well with UiBinder's @UiHandler and in general it saves you a lot of 
anonymous classes in your presenter.

So short story: Add a new method to your interface as its the safest thing 
to do. If you think your presenter looks a bit ugly because of lengthly 
view.getX().get/setY() method calls, don't use the feature interfaces in 
your view and instead define methods that work with the concrete values, 
e.g. String getName, Date getBirthday(), setAddressFocused(boolean), ... 

Hope that helps.

-- J.

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Re: newbie question about external classes

[Didier Durand]

Hi,

You have to have the source code of your classes and let GWT translate
them from Java to Javacript so that they can run in the browser.

Caution: the jre emulation in GWT is limited -> see the list to check
what your business classes can and cannot use. See
http://code.google.com/webtoolkit/doc/latest/RefJreEmulation.html ->
you may have to modify your business classes to comply with the list
of emulated classes.

regards
didier

On Nov 25, 9:38 am, xalien  wrote:
> hi all, I'm new of GWT and I apologize for my newbie question but I
> never found a response...
> I built a simple GWT application that show some data, the data
> actually is hardcoded on my class. Is it possibile, from my gwt
> class(EntryPoint), to use external business classes(stored in jar) to
> extract and elaborate my data before show it on web page? Compiling I
> receive the error "did you forget to inherit a required module?" but I
> can't inerit my classes because they are not gwt classes...
> Summarizing: is it possible in a GWT project using non GWT classes?
> how?

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Re: newbie question: deploying the starter web project

[LukaF]

I have the same problem with deploying on a tomcat. Everything works
fine in debug mode, but on tomcat, i can't get my RPC working. My
web.xml seems fine (the same as Oby) and @RemoteServiceRelativePath
matches that.

Is it wrong to create war files for tomcat just by zipping the whole
war folder and naming it "Projectname.war"? Tomcat doesn't report
anything wrong when deploying this war file.

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Re: newbie question: deploying the starter web project

[Oby Sumampouw]

I agree this seems to be some tomcat issue not GWT issue.
Ok I'll try and reply back.

Thanks
Oby

On Jul 15, 6:30 am, Katharina Probst  wrote:
> I think I know what the problem may be related to.
>
> When I navigate to:http://www.tuwuk.com/mainarea/
>
> I get nothing, but when I go to
>
> http://www.tuwuk.com
>
> Given what I've told you to do, I would expect the first one to work, not
> the second one.
>
> I get your starter project (with the error).  Because of the way you
> deployed it, it looks like the servlet will look for mainarea/greet, but
> it's not finding anything there (just like I didn't).  I think you have a
> problem with your tomcat setup - you say that public_html is your "webapps"
> folder.  Now I don't know enough tomcat hackery to know how to rename the
> webapps folder successfully (although I know you can make one project your
> "default" project, but the way I did it it still sat in the webapps folder),
> but it doesn't look like maybe you did it quite right.
>
> If you just have "stock" (i.e., unmodified) tomcat, you'll get a webapps
> directory, and you can dump your application (everything under war, like
> we'd discussed and you've done) there.  Can you give that a try and see if
> it works?
>
> kathrin
>
>
>
> On Thu, Jul 15, 2010 at 2:14 AM, Oby Sumampouw  wrote:
> > Hi Katharina,
>
> > Thanks for your help so far.
>
> > No I didn't have AppEngine enabled, I only have the GWT SDK clicked. I
> > also didn't change anything from the starter project.
> > I still have this line...
>
> > @RemoteServiceRelativePath("greet")
> > public interface GreetingService extends RemoteService
>
> > this is weird, the javascript RPC is pointing to the right servlet but
> > it says it cannot find the server... What can possibly go wrong. I
> > restarted the tomcat too.
>
> > In my CPanel error log I found this error
> > [Thu Jul 15 01:02:05 2010] [error] [client 99.185.43.174] File does
> > not exist: /home/osumampo/public_html/404.shtml, referer:
> >http://www.tuwuk.com/mainarea/F4DE64580EEC20A0487A6B1C498FA109.cache
> > [Thu Jul 15 01:02:05 2010] [error] [client 99.185.43.174] File does
> > not exist: /home/osumampo/public_html/mainarea/greet, referer:
> >http://www.tuwuk.com/mainarea/F4DE64580EEC20A0487A6B1C498FA109.cache
> > [Thu Jul 15 01:01:35 2010] [error] [client 99.185.43.174] File does
> > not exist: /home/osumampo/public_html/404.shtml
> > [Thu Jul 15 01:01:35 2010] [error] [client 99.185.43.174] File does
> > not exist: /home/osumampo/public_html/favicon.ico
>
> > So apparently the javascript is really pointing to the right URL
> > "mainarea/greet" but it seems the tomcat server does not translate
> > 'mainarea/greet' to the servlet but directly translate it to real
> > path.
> > I checked my web.xml in WEB_INF
>
> > 
> >  >    PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
> >    "http://java.sun.com/dtd/web-app_2_3.dtd";>
>
> > 
>
> >  
> >  
> >    greetServlet
> >     path.to.server.GreetingServiceImpl
> >   
>
> >  
> >    greetServlet
> >    /mainarea/greet
> >  
>
> >  
> >  
> >    MainArea.html
> >  
>
> > 
>
> > the url-pattern seems correct. Do you have any guess on why this
> > happen?
>
> > Thanks,
> > Oby
>
> > On Jul 14, 5:53 pm, Katharina Probst  wrote:
> > > When you created your project, did you have AppEngine enabled?  If you're
> > > trying to deploy with tomcat, you shouldn't have that option enabled.
>
> > > > does the javascript file generated by the GWT sends request to the
> > > > wrong servlet? does it point to /mainarea/greet all the time?
>
> > > Your client-side implementation of the RPC (what allows you to talk
> > between
> > > the client and the server) has an annotation that should look like
> > > this: @RemoteServiceRelativePath("greet")
>
> > > That's how it hooks up to the server side servlet (whose URL pattern is
> > > specified in the web.xml file). So, no, it doesn't have to point to
> > > /mainarea/greet. Did you modify anything from the starter project?
>
> > > kathrin
>
> > > > Thanks,
> > > > Oby
>
> > > > On Jul 14, 6:01 am, Katharina Probst  wrote:
> > > > > Try just taking the whole war directory that the compiler produces
> > (as
> > > > is)
> > > > > and copying it to your tomcat/webapps/ directory.  Rename the war
> > > > directory
> > > > > to the name of your webapp (say, public_html).
>
> > > > > Then do tomcat/bin/startup.sh
>
> > > > > and go to
>
> > > > > localhost:8080/public_html/MainArea.html
>
> > > > > That should do the trick...
>
> > > > > kathrinOn Wed, Jul 14, 2010 at 2:51 AM, Oby Sumampouw <
> > > > osumamp...@gmail.com> wrote:
> > > > > > Hi,
> > > > > > I am trying to see if I can deploy the web starter project to a web
> > > > > > server (which runs using tomcat)
>
> > > > > > The steps that I have done so far:
> > > > > > 0.) create new GWT application, so it's the default template for a
> > web
> > > > > > app
> > > > > > 1.) I compiled the starter project

Re: newbie question: deploying the starter web project

[Katharina Probst]

I think I know what the problem may be related to.

When I navigate to:
http://www.tuwuk.com/mainarea/

I get nothing, but when I go to

http://www.tuwuk.com

Given what I've told you to do, I would expect the first one to work, not
the second one.

I get your starter project (with the error).  Because of the way you
deployed it, it looks like the servlet will look for mainarea/greet, but
it's not finding anything there (just like I didn't).  I think you have a
problem with your tomcat setup - you say that public_html is your "webapps"
folder.  Now I don't know enough tomcat hackery to know how to rename the
webapps folder successfully (although I know you can make one project your
"default" project, but the way I did it it still sat in the webapps folder),
but it doesn't look like maybe you did it quite right.

If you just have "stock" (i.e., unmodified) tomcat, you'll get a webapps
directory, and you can dump your application (everything under war, like
we'd discussed and you've done) there.  Can you give that a try and see if
it works?

kathrin

On Thu, Jul 15, 2010 at 2:14 AM, Oby Sumampouw  wrote:

> Hi Katharina,
>
> Thanks for your help so far.
>
> No I didn't have AppEngine enabled, I only have the GWT SDK clicked. I
> also didn't change anything from the starter project.
> I still have this line...
>
> @RemoteServiceRelativePath("greet")
> public interface GreetingService extends RemoteService
>
> this is weird, the javascript RPC is pointing to the right servlet but
> it says it cannot find the server... What can possibly go wrong. I
> restarted the tomcat too.
>
> In my CPanel error log I found this error
> [Thu Jul 15 01:02:05 2010] [error] [client 99.185.43.174] File does
> not exist: /home/osumampo/public_html/404.shtml, referer:
> http://www.tuwuk.com/mainarea/F4DE64580EEC20A0487A6B1C498FA109.cache.html
> [Thu Jul 15 01:02:05 2010] [error] [client 99.185.43.174] File does
> not exist: /home/osumampo/public_html/mainarea/greet, referer:
> http://www.tuwuk.com/mainarea/F4DE64580EEC20A0487A6B1C498FA109.cache.html
> [Thu Jul 15 01:01:35 2010] [error] [client 99.185.43.174] File does
> not exist: /home/osumampo/public_html/404.shtml
> [Thu Jul 15 01:01:35 2010] [error] [client 99.185.43.174] File does
> not exist: /home/osumampo/public_html/favicon.ico
>
> So apparently the javascript is really pointing to the right URL
> "mainarea/greet" but it seems the tomcat server does not translate
> 'mainarea/greet' to the servlet but directly translate it to real
> path.
> I checked my web.xml in WEB_INF
>
> 
> PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
>"http://java.sun.com/dtd/web-app_2_3.dtd";>
>
> 
>
>  
>  
>greetServlet
> path.to.server.GreetingServiceImpl
>   
>
>  
>greetServlet
>/mainarea/greet
>  
>
>  
>  
>MainArea.html
>  
>
> 
>
> the url-pattern seems correct. Do you have any guess on why this
> happen?
>
> Thanks,
> Oby
>
>
>
>
> On Jul 14, 5:53 pm, Katharina Probst  wrote:
> > When you created your project, did you have AppEngine enabled?  If you're
> > trying to deploy with tomcat, you shouldn't have that option enabled.
> >
> > > does the javascript file generated by the GWT sends request to the
> > > wrong servlet? does it point to /mainarea/greet all the time?
> >
> > Your client-side implementation of the RPC (what allows you to talk
> between
> > the client and the server) has an annotation that should look like
> > this: @RemoteServiceRelativePath("greet")
> >
> > That's how it hooks up to the server side servlet (whose URL pattern is
> > specified in the web.xml file). So, no, it doesn't have to point to
> > /mainarea/greet. Did you modify anything from the starter project?
> >
> > kathrin
> >
> >
> >
> > > Thanks,
> > > Oby
> >
> > > On Jul 14, 6:01 am, Katharina Probst  wrote:
> > > > Try just taking the whole war directory that the compiler produces
> (as
> > > is)
> > > > and copying it to your tomcat/webapps/ directory.  Rename the war
> > > directory
> > > > to the name of your webapp (say, public_html).
> >
> > > > Then do tomcat/bin/startup.sh
> >
> > > > and go to
> >
> > > > localhost:8080/public_html/MainArea.html
> >
> > > > That should do the trick...
> >
> > > > kathrinOn Wed, Jul 14, 2010 at 2:51 AM, Oby Sumampouw <
> > > osumamp...@gmail.com> wrote:
> > > > > Hi,
> > > > > I am trying to see if I can deploy the web starter project to a web
> > > > > server (which runs using tomcat)
> >
> > > > > The steps that I have done so far:
> > > > > 0.) create new GWT application, so it's the default template for a
> web
> > > > > app
> > > > > 1.) I compiled the starter project
> > > > > 2.) Copy the class, lib directory to the ~/public_html/WEB-INF
> > > > > 3.) Copy the web.xml to the ~/public_html/WEB-INF
> >
> > > > > this is the web.xml
> >
> > > > > 
> > > > >  > > > >PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
> > > > >"http://java.sun.com/dtd/web-app_2_3.dtd"

Re: newbie question: deploying the starter web project

[Oby Sumampouw]

Hi Katharina,

Thanks for your help so far.

No I didn't have AppEngine enabled, I only have the GWT SDK clicked. I
also didn't change anything from the starter project.
I still have this line...

@RemoteServiceRelativePath("greet")
public interface GreetingService extends RemoteService

this is weird, the javascript RPC is pointing to the right servlet but
it says it cannot find the server... What can possibly go wrong. I
restarted the tomcat too.

In my CPanel error log I found this error
[Thu Jul 15 01:02:05 2010] [error] [client 99.185.43.174] File does
not exist: /home/osumampo/public_html/404.shtml, referer:
http://www.tuwuk.com/mainarea/F4DE64580EEC20A0487A6B1C498FA109.cache.html
[Thu Jul 15 01:02:05 2010] [error] [client 99.185.43.174] File does
not exist: /home/osumampo/public_html/mainarea/greet, referer:
http://www.tuwuk.com/mainarea/F4DE64580EEC20A0487A6B1C498FA109.cache.html
[Thu Jul 15 01:01:35 2010] [error] [client 99.185.43.174] File does
not exist: /home/osumampo/public_html/404.shtml
[Thu Jul 15 01:01:35 2010] [error] [client 99.185.43.174] File does
not exist: /home/osumampo/public_html/favicon.ico

So apparently the javascript is really pointing to the right URL
"mainarea/greet" but it seems the tomcat server does not translate
'mainarea/greet' to the servlet but directly translate it to real
path.
I checked my web.xml in WEB_INF


http://java.sun.com/dtd/web-app_2_3.dtd";>



  
  
greetServlet
path.to.server.GreetingServiceImpl
  

  
greetServlet
/mainarea/greet
  

  
  
MainArea.html
  



the url-pattern seems correct. Do you have any guess on why this
happen?

Thanks,
Oby




On Jul 14, 5:53 pm, Katharina Probst  wrote:
> When you created your project, did you have AppEngine enabled?  If you're
> trying to deploy with tomcat, you shouldn't have that option enabled.
>
> > does the javascript file generated by the GWT sends request to the
> > wrong servlet? does it point to /mainarea/greet all the time?
>
> Your client-side implementation of the RPC (what allows you to talk between
> the client and the server) has an annotation that should look like
> this: @RemoteServiceRelativePath("greet")
>
> That's how it hooks up to the server side servlet (whose URL pattern is
> specified in the web.xml file). So, no, it doesn't have to point to
> /mainarea/greet. Did you modify anything from the starter project?
>
> kathrin
>
>
>
> > Thanks,
> > Oby
>
> > On Jul 14, 6:01 am, Katharina Probst  wrote:
> > > Try just taking the whole war directory that the compiler produces (as
> > is)
> > > and copying it to your tomcat/webapps/ directory.  Rename the war
> > directory
> > > to the name of your webapp (say, public_html).
>
> > > Then do tomcat/bin/startup.sh
>
> > > and go to
>
> > > localhost:8080/public_html/MainArea.html
>
> > > That should do the trick...
>
> > > kathrinOn Wed, Jul 14, 2010 at 2:51 AM, Oby Sumampouw <
> > osumamp...@gmail.com> wrote:
> > > > Hi,
> > > > I am trying to see if I can deploy the web starter project to a web
> > > > server (which runs using tomcat)
>
> > > > The steps that I have done so far:
> > > > 0.) create new GWT application, so it's the default template for a web
> > > > app
> > > > 1.) I compiled the starter project
> > > > 2.) Copy the class, lib directory to the ~/public_html/WEB-INF
> > > > 3.) Copy the web.xml to the ~/public_html/WEB-INF
>
> > > > this is the web.xml
>
> > > > 
> > > >  > > >    PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
> > > >    "http://java.sun.com/dtd/web-app_2_3.dtd";>
>
> > > > 
>
> > > >  
> > > >  
> > > >    greetServlet
> > > >    bla.bla.bla.server.GreetingServiceImpl > > > class>
> > > >  
>
> > > >  
> > > >    greetServlet
> > > >    /mainarea/greet
> > > >  
>
> > > >  
> > > >  
> > > >    MainArea.html
> > > >  
>
> > > > 
>
> > > > 4.) I put the MainArea.html and MainArea.css to the ~/public_html
> > > > because they are the welcome-file
> > > > 5.) I copied the compiled javascript and resources (in the folder
> > > > called 'mainarea') to ~/public_html
> > > > 6.) So the structure is like this:
>
> > > > -- public_html
> > > >      |- MainArea.html
> > > >      |- MainArea.css
> > > >      |- WEB-INF
> > > >           |- web.xml
> > > >           |- lib
> > > >           |- class
> > > >      |- mainarea
> > > >           |- gwt
> > > >           |- hosted.html
> > > >           |- mainarea.nocache.js
> > > >           |- other resources
>
> > > > When I go to the website, the page loads fine. But when I click send
> > > > (to send the input to the server) it seems the path is wrong. I got
> > > > this error:
>
> > > > Sending name to the server:
> > > > GWT User
>
> > > > Server replies:
> > > > An error occurred while attempting to contact the server. Please check
> > > > your network connection and try again.
>
> > > > I was wondering if this servlet location is correct?
>
> > > > Another noob question about JSP, can I put the generated javascript
> > > > code to ~/pu

Re: newbie question: deploying the starter web project

[Katharina Probst]

When you created your project, did you have AppEngine enabled?  If you're
trying to deploy with tomcat, you shouldn't have that option enabled.


> does the javascript file generated by the GWT sends request to the
> wrong servlet? does it point to /mainarea/greet all the time?
>
>
Your client-side implementation of the RPC (what allows you to talk between
the client and the server) has an annotation that should look like
this: @RemoteServiceRelativePath("greet")

That's how it hooks up to the server side servlet (whose URL pattern is
specified in the web.xml file). So, no, it doesn't have to point to
/mainarea/greet. Did you modify anything from the starter project?

kathrin


> Thanks,
> Oby
>
>
> On Jul 14, 6:01 am, Katharina Probst  wrote:
> > Try just taking the whole war directory that the compiler produces (as
> is)
> > and copying it to your tomcat/webapps/ directory.  Rename the war
> directory
> > to the name of your webapp (say, public_html).
> >
> > Then do tomcat/bin/startup.sh
> >
> > and go to
> >
> > localhost:8080/public_html/MainArea.html
> >
> > That should do the trick...
> >
> > kathrinOn Wed, Jul 14, 2010 at 2:51 AM, Oby Sumampouw <
> osumamp...@gmail.com> wrote:
> > > Hi,
> > > I am trying to see if I can deploy the web starter project to a web
> > > server (which runs using tomcat)
> >
> > > The steps that I have done so far:
> > > 0.) create new GWT application, so it's the default template for a web
> > > app
> > > 1.) I compiled the starter project
> > > 2.) Copy the class, lib directory to the ~/public_html/WEB-INF
> > > 3.) Copy the web.xml to the ~/public_html/WEB-INF
> >
> > > this is the web.xml
> >
> > > 
> > >  > >PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
> > >"http://java.sun.com/dtd/web-app_2_3.dtd";>
> >
> > > 
> >
> > >  
> > >  
> > >greetServlet
> > >bla.bla.bla.server.GreetingServiceImpl > > class>
> > >  
> >
> > >  
> > >greetServlet
> > >/mainarea/greet
> > >  
> >
> > >  
> > >  
> > >MainArea.html
> > >  
> >
> > > 
> >
> > > 4.) I put the MainArea.html and MainArea.css to the ~/public_html
> > > because they are the welcome-file
> > > 5.) I copied the compiled javascript and resources (in the folder
> > > called 'mainarea') to ~/public_html
> > > 6.) So the structure is like this:
> >
> > > -- public_html
> > >  |- MainArea.html
> > >  |- MainArea.css
> > >  |- WEB-INF
> > >   |- web.xml
> > >   |- lib
> > >   |- class
> > >  |- mainarea
> > >   |- gwt
> > >   |- hosted.html
> > >   |- mainarea.nocache.js
> > >   |- other resources
> >
> > > When I go to the website, the page loads fine. But when I click send
> > > (to send the input to the server) it seems the path is wrong. I got
> > > this error:
> >
> > > Sending name to the server:
> > > GWT User
> >
> > > Server replies:
> > > An error occurred while attempting to contact the server. Please check
> > > your network connection and try again.
> >
> > > I was wondering if this servlet location is correct?
> >
> > > Another noob question about JSP, can I put the generated javascript
> > > code to ~/public_html/WEB_INF/mainarea instead of ~/public_html/
> > > mainarea.
> >
> > > Initially I thought WEB_INF becomes the root directory if web app
> > > tries to refer to some file? But apparently in the MainArea.html the
> > > script src='mainarea/mainare.nocache.js' doesn't work if I put
> > > mainarea inside WEB_INF.
> >
> > > I wish there's a way to make the html file able to access the mainarea
> > > directory from WEB_INF. Is it possible?
> >
> > > Thanks!
> >
> > > --
> > > You received this message because you are subscribed to the Google
> Groups
> > > "Google Web Toolkit" group.
> > > To post to this group, send email to
> google-web-tool...@googlegroups.com.
> > > To unsubscribe from this group, send email to
> > > google-web-toolkit+unsubscr...@googlegroups.com cr...@googlegroups.com>
> > > .
> > > For more options, visit this group at
> > >http://groups.google.com/group/google-web-toolkit?hl=en.
>
> --
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> "Google Web Toolkit" group.
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Re: newbie question: deploying the starter web project

[Oby Sumampouw]

I copied the content of war directory to the web_app (which is my
public_html directory). Then I restarted tomcat, still I got the same
error

--- ERROR--
Sending name to the server:
test abcdef

Server replies:
An error occurred while attempting to contact the server. Please check
your network connection and try again
-- ERROR--

does the javascript file generated by the GWT sends request to the
wrong servlet? does it point to /mainarea/greet all the time?

Thanks,
Oby


On Jul 14, 6:01 am, Katharina Probst  wrote:
> Try just taking the whole war directory that the compiler produces (as is)
> and copying it to your tomcat/webapps/ directory.  Rename the war directory
> to the name of your webapp (say, public_html).
>
> Then do tomcat/bin/startup.sh
>
> and go to
>
> localhost:8080/public_html/MainArea.html
>
> That should do the trick...
>
> kathrinOn Wed, Jul 14, 2010 at 2:51 AM, Oby Sumampouw  
> wrote:
> > Hi,
> > I am trying to see if I can deploy the web starter project to a web
> > server (which runs using tomcat)
>
> > The steps that I have done so far:
> > 0.) create new GWT application, so it's the default template for a web
> > app
> > 1.) I compiled the starter project
> > 2.) Copy the class, lib directory to the ~/public_html/WEB-INF
> > 3.) Copy the web.xml to the ~/public_html/WEB-INF
>
> > this is the web.xml
>
> > 
> >  >    PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
> >    "http://java.sun.com/dtd/web-app_2_3.dtd";>
>
> > 
>
> >  
> >  
> >    greetServlet
> >    bla.bla.bla.server.GreetingServiceImpl > class>
> >  
>
> >  
> >    greetServlet
> >    /mainarea/greet
> >  
>
> >  
> >  
> >    MainArea.html
> >  
>
> > 
>
> > 4.) I put the MainArea.html and MainArea.css to the ~/public_html
> > because they are the welcome-file
> > 5.) I copied the compiled javascript and resources (in the folder
> > called 'mainarea') to ~/public_html
> > 6.) So the structure is like this:
>
> > -- public_html
> >      |- MainArea.html
> >      |- MainArea.css
> >      |- WEB-INF
> >           |- web.xml
> >           |- lib
> >           |- class
> >      |- mainarea
> >           |- gwt
> >           |- hosted.html
> >           |- mainarea.nocache.js
> >           |- other resources
>
> > When I go to the website, the page loads fine. But when I click send
> > (to send the input to the server) it seems the path is wrong. I got
> > this error:
>
> > Sending name to the server:
> > GWT User
>
> > Server replies:
> > An error occurred while attempting to contact the server. Please check
> > your network connection and try again.
>
> > I was wondering if this servlet location is correct?
>
> > Another noob question about JSP, can I put the generated javascript
> > code to ~/public_html/WEB_INF/mainarea instead of ~/public_html/
> > mainarea.
>
> > Initially I thought WEB_INF becomes the root directory if web app
> > tries to refer to some file? But apparently in the MainArea.html the
> > script src='mainarea/mainare.nocache.js' doesn't work if I put
> > mainarea inside WEB_INF.
>
> > I wish there's a way to make the html file able to access the mainarea
> > directory from WEB_INF. Is it possible?
>
> > Thanks!
>
> > --
> > You received this message because you are subscribed to the Google Groups
> > "Google Web Toolkit" group.
> > To post to this group, send email to google-web-tool...@googlegroups.com.
> > To unsubscribe from this group, send email to
> > google-web-toolkit+unsubscr...@googlegroups.com > cr...@googlegroups.com>
> > .
> > For more options, visit this group at
> >http://groups.google.com/group/google-web-toolkit?hl=en.

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Re: newbie question: deploying the starter web project

[Katharina Probst]

Try just taking the whole war directory that the compiler produces (as is)
and copying it to your tomcat/webapps/ directory.  Rename the war directory
to the name of your webapp (say, public_html).

Then do tomcat/bin/startup.sh

and go to

localhost:8080/public_html/MainArea.html

That should do the trick...

kathrin

On Wed, Jul 14, 2010 at 2:51 AM, Oby Sumampouw  wrote:

> Hi,
> I am trying to see if I can deploy the web starter project to a web
> server (which runs using tomcat)
>
> The steps that I have done so far:
> 0.) create new GWT application, so it's the default template for a web
> app
> 1.) I compiled the starter project
> 2.) Copy the class, lib directory to the ~/public_html/WEB-INF
> 3.) Copy the web.xml to the ~/public_html/WEB-INF
>
> this is the web.xml
>
> 
> PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
>"http://java.sun.com/dtd/web-app_2_3.dtd";>
>
> 
>
>  
>  
>greetServlet
>bla.bla.bla.server.GreetingServiceImpl class>
>  
>
>  
>greetServlet
>/mainarea/greet
>  
>
>  
>  
>MainArea.html
>  
>
> 
>
> 4.) I put the MainArea.html and MainArea.css to the ~/public_html
> because they are the welcome-file
> 5.) I copied the compiled javascript and resources (in the folder
> called 'mainarea') to ~/public_html
> 6.) So the structure is like this:
>
> -- public_html
>  |- MainArea.html
>  |- MainArea.css
>  |- WEB-INF
>   |- web.xml
>   |- lib
>   |- class
>  |- mainarea
>   |- gwt
>   |- hosted.html
>   |- mainarea.nocache.js
>   |- other resources
>
> When I go to the website, the page loads fine. But when I click send
> (to send the input to the server) it seems the path is wrong. I got
> this error:
>
> Sending name to the server:
> GWT User
>
> Server replies:
> An error occurred while attempting to contact the server. Please check
> your network connection and try again.
>
> I was wondering if this servlet location is correct?
>
> Another noob question about JSP, can I put the generated javascript
> code to ~/public_html/WEB_INF/mainarea instead of ~/public_html/
> mainarea.
>
> Initially I thought WEB_INF becomes the root directory if web app
> tries to refer to some file? But apparently in the MainArea.html the
> script src='mainarea/mainare.nocache.js' doesn't work if I put
> mainarea inside WEB_INF.
>
> I wish there's a way to make the html file able to access the mainarea
> directory from WEB_INF. Is it possible?
>
> Thanks!
>
> --
> You received this message because you are subscribed to the Google Groups
> "Google Web Toolkit" group.
> To post to this group, send email to google-web-tool...@googlegroups.com.
> To unsubscribe from this group, send email to
> google-web-toolkit+unsubscr...@googlegroups.com
> .
> For more options, visit this group at
> http://groups.google.com/group/google-web-toolkit?hl=en.
>
>

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Re: Newbie question: How does one write a Unit test for MyClass extends RemoteServiceServlet ???

[Trung]

You can use SyncProxy to test the GWT RPC services

See http://www.gdevelop.com/w/blog/2010/01/10/testing-gwt-rpc-services/
for details



On May 5, 9:28 pm, Eric  wrote:
> On May 5, 12:33 am, Mike  wrote:
>
> > Hello
>
> > Am trying to write tests for my code, and want to ensure that any
> > class I write which extends RemoteServiceServlet;
> > however, I'm not quite catching on to what I need to do in order to
> > get a test to be runnable in that context...
>
> Have the servlet do all its work in another class, and test that
> class,
> I guess. One project I was later assigned to had made a suboptimal
> decision to do all the serious work of the application in Struts
> Action
> classes directly. Then, they tried to add web services, and now the
> services had to create Struts beans and actions.  Don't go that way.
>
> If you use a library like gwt-dispatcher, this is done for you
> naturally.
>
> Respectfully,
> Eric Jablow
>
> --
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Re: Newbie question: How does one write a Unit test for MyClass extends RemoteServiceServlet ???

[Eric]

On May 5, 12:33 am, Mike  wrote:
> Hello
>
> Am trying to write tests for my code, and want to ensure that any
> class I write which extends RemoteServiceServlet;
> however, I'm not quite catching on to what I need to do in order to
> get a test to be runnable in that context...

Have the servlet do all its work in another class, and test that
class,
I guess. One project I was later assigned to had made a suboptimal
decision to do all the serious work of the application in Struts
Action
classes directly. Then, they tried to add web services, and now the
services had to create Struts beans and actions.  Don't go that way.

If you use a library like gwt-dispatcher, this is done for you
naturally.

Respectfully,
Eric Jablow

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Re: Newbie question: How does one write a Unit test for MyClass extends RemoteServiceServlet ???

[Mike]

Thanks,

But if I take your suggestion correctly -- that only allows me to test
the *use* of the Servlet, and not test the code in the Servlet
itself.  I want to try and test the servlet's code...

Cheers
Mike

On May 5, 12:31 am, rudolf michael  wrote:
> i guess that you need to mock it using jMock or easyMock, but i dont have a
> running example although i saw some unit tests for drools/jBPM where they
> use those mocking jars in order to simulate some context/DAO services.
>
> On Wed, May 5, 2010 at 7:33 AM, Mike  wrote:
> > Hello
>
> > Am trying to write tests for my code, and want to ensure that any
> > class I write which extends RemoteServiceServlet;
> > however, I'm not quite catching on to what I need to do in order to
> > get a test to be runnable in that context...
>
> > Any help is greatly appreciated (links, samples, explanation, etc).
>
> > Cheers
> > Mike

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Re: Newbie question: How does one write a Unit test for MyClass extends RemoteServiceServlet ???

[rudolf michael]

i guess that you need to mock it using jMock or easyMock, but i dont have a
running example although i saw some unit tests for drools/jBPM where they
use those mocking jars in order to simulate some context/DAO services.

On Wed, May 5, 2010 at 7:33 AM, Mike  wrote:

> Hello
>
> Am trying to write tests for my code, and want to ensure that any
> class I write which extends RemoteServiceServlet;
> however, I'm not quite catching on to what I need to do in order to
> get a test to be runnable in that context...
>
> Any help is greatly appreciated (links, samples, explanation, etc).
>
> Cheers
> Mike
>
> --
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> google-web-toolkit+unsubscr...@googlegroups.com
> .
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>
>

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Re: Newbie question : Problem with GWT RPC when running running through GWT + AppEngine tutorial

[vijay]

Thanks Abdullah, I got that working.
The 
tutorial
tells
to download stockwacher
project
and import it in eclipse. The package contains old gwt-rpc.jar which is not
compatible with new gwt sdk and  hence fails with exception I pasted in my
earlier mail.
A easy fix is to build new project and copy jar from new project to
stockwatcher one.

On Wed, Mar 31, 2010 at 8:15 PM, Abdullah Shaikh <
abdullah.shaik...@gmail.com> wrote:

> I think you are sending an object of type not defined in you rpc file,
> delete you rpc file so that a new one is created.
>
> - Abdullah
>
> On Wed, Mar 31, 2010 at 1:58 AM, vijay  wrote:
>
>> hi,
>> I am using GWT 2.0.3 version, I am going through the steps mentioned in
>> GWT tutorial
>>
>> http://code.google.com/webtoolkit/doc/latest/tutorial/appengine.html
>>
>> When trying to integrate login service I get following exception. I tried
>> using a normal GWT RPC and it also gave me similar exception.
>>
>> Mar 30, 2010 6:44:49 PM
>> com.google.appengine.tools.development.ApiProxyLocalImpl log
>> SEVERE: [1269974689208000] javax.servlet.ServletContext log: loginService:
>> ERROR: Failed to parse the policy file
>> '/stockwatcher/748E07BA5F0BCE26285053278C0378CB.gwt.rpc'
>> java.text.ParseException: Expected: className, [true | false]
>>  at
>> com.google.gwt.user.server.rpc.SerializationPolicyLoader.loadFromStream(SerializationPolicyLoader.java:116)
>> at
>> com.google.gwt.user.server.rpc.RemoteServiceServlet.doGetSerializationPolicy(RemoteServiceServlet.java:234)
>>  at
>> com.google.gwt.user.server.rpc.RemoteServiceServlet.getSerializationPolicy(RemoteServiceServlet.java:117)
>> at
>> com.google.gwt.user.server.rpc.impl.ServerSerializationStreamReader.prepareToRead(ServerSerializationStreamReader.java:429)
>>  at com.google.gwt.user.server.rpc.RPC.decodeRequest(RPC.java:234)
>> at
>> com.google.gwt.user.server.rpc.RemoteServiceServlet.processCall(RemoteServiceServlet.java:164)
>>  at
>> com.google.gwt.user.server.rpc.RemoteServiceServlet.doPost(RemoteServiceServlet.java:86)
>> at javax.servlet.http.HttpServlet.service(HttpServlet.java:713)
>>  at javax.servlet.http.HttpServlet.service(HttpServlet.java:806)
>> at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:487)
>>  at
>> org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1093)
>> at
>> com.google.appengine.api.blobstore.dev.ServeBlobFilter.doFilter(ServeBlobFilter.java:51)
>>  at
>> org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1084)
>> at
>> com.google.apphosting.utils.servlet.TransactionCleanupFilter.doFilter(TransactionCleanupFilter.java:43)
>>  at
>> org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1084)
>> at
>> com.google.appengine.tools.development.StaticFileFilter.doFilter(StaticFileFilter.java:121)
>>  at
>> org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1084)
>> at
>> org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:360)
>>  at
>> org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216)
>> at
>> org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:181)
>>  at
>> org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:712)
>> at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:405)
>>  at
>> com.google.apphosting.utils.jetty.DevAppEngineWebAppContext.handle(DevAppEngineWebAppContext.java:70)
>> at
>> org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:139)
>>  at
>> com.google.appengine.tools.development.JettyContainerService$ApiProxyHandler.handle(JettyContainerService.java:352)
>> at
>> org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:139)
>>  at org.mortbay.jetty.Server.handle(Server.java:313)
>> at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:506)
>>  at
>> org.mortbay.jetty.HttpConnection$RequestHandler.content(HttpConnection.java:844)
>> at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:644)
>>  at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:211)
>> at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:381)
>>  at
>> org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:396)
>> at
>> org.mortbay.thread.BoundedThreadPool$PoolThread.run(BoundedThreadPool.java:442)
>>
>> Mar 30, 2010 6:44:49 PM
>> com.google.appengine.tools.development.ApiProxyLocalImpl log
>> SEVERE: [1269974689224000] javax.servlet.ServletContext log: loginService:
>> An IncompatibleRemoteServiceException was thrown while processing this call.
>> com.google.gwt.user.client.rpc.IncompatibleRemoteServiceException:
>> Parameter 0 of is of an unknown type 'java.lang.String/2004016611'
>> at com.google.gwt.user.server.rpc.RPC.decodeRequest(RPC.java:277)
>> 

Re: Newbie question : Problem with GWT RPC when running running through GWT + AppEngine tutorial

[Abdullah Shaikh]

I think you are sending an object of type not defined in you rpc file,
delete you rpc file so that a new one is created.

- Abdullah

On Wed, Mar 31, 2010 at 1:58 AM, vijay  wrote:

> hi,
> I am using GWT 2.0.3 version, I am going through the steps mentioned in GWT
> tutorial
>
> http://code.google.com/webtoolkit/doc/latest/tutorial/appengine.html
>
> When trying to integrate login service I get following exception. I tried
> using a normal GWT RPC and it also gave me similar exception.
>
> Mar 30, 2010 6:44:49 PM
> com.google.appengine.tools.development.ApiProxyLocalImpl log
> SEVERE: [1269974689208000] javax.servlet.ServletContext log: loginService:
> ERROR: Failed to parse the policy file
> '/stockwatcher/748E07BA5F0BCE26285053278C0378CB.gwt.rpc'
> java.text.ParseException: Expected: className, [true | false]
>  at
> com.google.gwt.user.server.rpc.SerializationPolicyLoader.loadFromStream(SerializationPolicyLoader.java:116)
> at
> com.google.gwt.user.server.rpc.RemoteServiceServlet.doGetSerializationPolicy(RemoteServiceServlet.java:234)
>  at
> com.google.gwt.user.server.rpc.RemoteServiceServlet.getSerializationPolicy(RemoteServiceServlet.java:117)
> at
> com.google.gwt.user.server.rpc.impl.ServerSerializationStreamReader.prepareToRead(ServerSerializationStreamReader.java:429)
>  at com.google.gwt.user.server.rpc.RPC.decodeRequest(RPC.java:234)
> at
> com.google.gwt.user.server.rpc.RemoteServiceServlet.processCall(RemoteServiceServlet.java:164)
>  at
> com.google.gwt.user.server.rpc.RemoteServiceServlet.doPost(RemoteServiceServlet.java:86)
> at javax.servlet.http.HttpServlet.service(HttpServlet.java:713)
>  at javax.servlet.http.HttpServlet.service(HttpServlet.java:806)
> at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:487)
>  at
> org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1093)
> at
> com.google.appengine.api.blobstore.dev.ServeBlobFilter.doFilter(ServeBlobFilter.java:51)
>  at
> org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1084)
> at
> com.google.apphosting.utils.servlet.TransactionCleanupFilter.doFilter(TransactionCleanupFilter.java:43)
>  at
> org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1084)
> at
> com.google.appengine.tools.development.StaticFileFilter.doFilter(StaticFileFilter.java:121)
>  at
> org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1084)
> at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:360)
>  at
> org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216)
> at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:181)
>  at
> org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:712)
> at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:405)
>  at
> com.google.apphosting.utils.jetty.DevAppEngineWebAppContext.handle(DevAppEngineWebAppContext.java:70)
> at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:139)
>  at
> com.google.appengine.tools.development.JettyContainerService$ApiProxyHandler.handle(JettyContainerService.java:352)
> at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:139)
>  at org.mortbay.jetty.Server.handle(Server.java:313)
> at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:506)
>  at
> org.mortbay.jetty.HttpConnection$RequestHandler.content(HttpConnection.java:844)
> at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:644)
>  at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:211)
> at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:381)
>  at
> org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:396)
> at
> org.mortbay.thread.BoundedThreadPool$PoolThread.run(BoundedThreadPool.java:442)
>
> Mar 30, 2010 6:44:49 PM
> com.google.appengine.tools.development.ApiProxyLocalImpl log
> SEVERE: [1269974689224000] javax.servlet.ServletContext log: loginService:
> An IncompatibleRemoteServiceException was thrown while processing this call.
> com.google.gwt.user.client.rpc.IncompatibleRemoteServiceException:
> Parameter 0 of is of an unknown type 'java.lang.String/2004016611'
> at com.google.gwt.user.server.rpc.RPC.decodeRequest(RPC.java:277)
>  at
> com.google.gwt.user.server.rpc.RemoteServiceServlet.processCall(RemoteServiceServlet.java:164)
> at
> com.google.gwt.user.server.rpc.RemoteServiceServlet.doPost(RemoteServiceServlet.java:86)
>  at javax.servlet.http.HttpServlet.service(HttpServlet.java:713)
> at javax.servlet.http.HttpServlet.service(HttpServlet.java:806)
>  at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:487)
> at
> org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1093)
>  at
> com.google.appengine.api.blobstore.dev.ServeBlobFilter.doFilter(ServeBlobFilter.java:51)
> at
> org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1084

Re: Newbie question : Problem with GWT RPC when running running through GWT + AppEngine tutorial

[vijay]

Ping!

On Wed, Mar 31, 2010 at 1:58 AM, vijay  wrote:

> hi,
> I am using GWT 2.0.3 version, I am going through the steps mentioned in GWT
> tutorial
>
> http://code.google.com/webtoolkit/doc/latest/tutorial/appengine.html
>
> When trying to integrate login service I get following exception. I tried
> using a normal GWT RPC and it also gave me similar exception.
>
> Mar 30, 2010 6:44:49 PM
> com.google.appengine.tools.development.ApiProxyLocalImpl log
> SEVERE: [1269974689208000] javax.servlet.ServletContext log: loginService:
> ERROR: Failed to parse the policy file
> '/stockwatcher/748E07BA5F0BCE26285053278C0378CB.gwt.rpc'
> java.text.ParseException: Expected: className, [true | false]
>  at
> com.google.gwt.user.server.rpc.SerializationPolicyLoader.loadFromStream(SerializationPolicyLoader.java:116)
> at
> com.google.gwt.user.server.rpc.RemoteServiceServlet.doGetSerializationPolicy(RemoteServiceServlet.java:234)
>  at
> com.google.gwt.user.server.rpc.RemoteServiceServlet.getSerializationPolicy(RemoteServiceServlet.java:117)
> at
> com.google.gwt.user.server.rpc.impl.ServerSerializationStreamReader.prepareToRead(ServerSerializationStreamReader.java:429)
>  at com.google.gwt.user.server.rpc.RPC.decodeRequest(RPC.java:234)
> at
> com.google.gwt.user.server.rpc.RemoteServiceServlet.processCall(RemoteServiceServlet.java:164)
>  at
> com.google.gwt.user.server.rpc.RemoteServiceServlet.doPost(RemoteServiceServlet.java:86)
> at javax.servlet.http.HttpServlet.service(HttpServlet.java:713)
>  at javax.servlet.http.HttpServlet.service(HttpServlet.java:806)
> at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:487)
>  at
> org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1093)
> at
> com.google.appengine.api.blobstore.dev.ServeBlobFilter.doFilter(ServeBlobFilter.java:51)
>  at
> org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1084)
> at
> com.google.apphosting.utils.servlet.TransactionCleanupFilter.doFilter(TransactionCleanupFilter.java:43)
>  at
> org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1084)
> at
> com.google.appengine.tools.development.StaticFileFilter.doFilter(StaticFileFilter.java:121)
>  at
> org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1084)
> at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:360)
>  at
> org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216)
> at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:181)
>  at
> org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:712)
> at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:405)
>  at
> com.google.apphosting.utils.jetty.DevAppEngineWebAppContext.handle(DevAppEngineWebAppContext.java:70)
> at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:139)
>  at
> com.google.appengine.tools.development.JettyContainerService$ApiProxyHandler.handle(JettyContainerService.java:352)
> at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:139)
>  at org.mortbay.jetty.Server.handle(Server.java:313)
> at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:506)
>  at
> org.mortbay.jetty.HttpConnection$RequestHandler.content(HttpConnection.java:844)
> at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:644)
>  at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:211)
> at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:381)
>  at
> org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:396)
> at
> org.mortbay.thread.BoundedThreadPool$PoolThread.run(BoundedThreadPool.java:442)
>
> Mar 30, 2010 6:44:49 PM
> com.google.appengine.tools.development.ApiProxyLocalImpl log
> SEVERE: [1269974689224000] javax.servlet.ServletContext log: loginService:
> An IncompatibleRemoteServiceException was thrown while processing this call.
> com.google.gwt.user.client.rpc.IncompatibleRemoteServiceException:
> Parameter 0 of is of an unknown type 'java.lang.String/2004016611'
> at com.google.gwt.user.server.rpc.RPC.decodeRequest(RPC.java:277)
>  at
> com.google.gwt.user.server.rpc.RemoteServiceServlet.processCall(RemoteServiceServlet.java:164)
> at
> com.google.gwt.user.server.rpc.RemoteServiceServlet.doPost(RemoteServiceServlet.java:86)
>  at javax.servlet.http.HttpServlet.service(HttpServlet.java:713)
> at javax.servlet.http.HttpServlet.service(HttpServlet.java:806)
>  at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:487)
> at
> org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1093)
>  at
> com.google.appengine.api.blobstore.dev.ServeBlobFilter.doFilter(ServeBlobFilter.java:51)
> at
> org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1084)
>  at
> com.google.apphosting.utils.servlet.TransactionCleanupFilter.doFilter(TransactionCleanupFilter.java:43)
> at
> org.mo

Re: newbie question, problem adding jar library

[khalid]

hi guys
it took much time for this post to be approved by moderators
anyway I have solved the problem yesterday by disabling google app
engine ^_^
-
chris:Thank you I am going to need this before deploying my server
side code

Victor: exactly , I work on netbeans always and it is very easy but I
use eclipse for GWT projects

Sir: Thank you very much , disabling google app engine is the solution

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Re: newbie question, problem adding jar library

[Sripathi Krishnan]

You may have accidentally enabled Google App Engine. Try disabling it for
your project in eclipse.
App Engine does not allow you to use databases, and you are likely to get
the error you pasted.


--Sri
http://blog.530geeks.com


2010/3/12 Víctor Llorens Vilella 

> At least in netbeans, there's an option in to include selected library in
> war file.
>
>
> On 11 March 2010 18:37, Chris Lercher  wrote:
>
>> Hi,
>>
>> adding it to the build path isn't enough in this case. The jar has to
>> be found by the server at runtime. To achieve this, you can put the
>> jar in the directory "war/WEB-INF/lib".
>>
>> Chris
>>
>> On Mar 11, 12:25 am, khalid  wrote:
>> > Hello every one
>> > I am making this simple application where the user fills some fields
>> > and makes an RPC to save these info
>> > in a DB anyway the server method uses the popular: Connection ,
>> > PreparedStatement ,... etc classes
>> > which are in the mysql-connector jar file "I think so ^_^ "
>> > I have followed these steps to add the library but no luck
>> >
>> > steps here:http://www.wikihow.com/Add-JARs-to-Project-Build-Paths-in-
>> > Eclipse-%28Java%29
>> >
>> > I still get java.lang.ClassNotFoundException: com.mysql.jdbc.Driver
>> > Can you please help me, I am new to GWT and I plan to use it for my
>> > Graduation project ^_^
>> > Thank you very much
>>
>> --
>> You received this message because you are subscribed to the Google Groups
>> "Google Web Toolkit" group.
>> To post to this group, send email to google-web-tool...@googlegroups.com.
>> To unsubscribe from this group, send email to
>> google-web-toolkit+unsubscr...@googlegroups.com
>> .
>> For more options, visit this group at
>> http://groups.google.com/group/google-web-toolkit?hl=en.
>>
>>
>
>
> --
> Victor Llorens Vilella
>
>
>  --
> You received this message because you are subscribed to the Google Groups
> "Google Web Toolkit" group.
> To post to this group, send email to google-web-tool...@googlegroups.com.
> To unsubscribe from this group, send email to
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> .
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> http://groups.google.com/group/google-web-toolkit?hl=en.
>

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Re: newbie question, problem adding jar library

[Víctor Llorens Vilella]

At least in netbeans, there's an option in to include selected library in
war file.

On 11 March 2010 18:37, Chris Lercher  wrote:

> Hi,
>
> adding it to the build path isn't enough in this case. The jar has to
> be found by the server at runtime. To achieve this, you can put the
> jar in the directory "war/WEB-INF/lib".
>
> Chris
>
> On Mar 11, 12:25 am, khalid  wrote:
> > Hello every one
> > I am making this simple application where the user fills some fields
> > and makes an RPC to save these info
> > in a DB anyway the server method uses the popular: Connection ,
> > PreparedStatement ,... etc classes
> > which are in the mysql-connector jar file "I think so ^_^ "
> > I have followed these steps to add the library but no luck
> >
> > steps here:http://www.wikihow.com/Add-JARs-to-Project-Build-Paths-in-
> > Eclipse-%28Java%29
> >
> > I still get java.lang.ClassNotFoundException: com.mysql.jdbc.Driver
> > Can you please help me, I am new to GWT and I plan to use it for my
> > Graduation project ^_^
> > Thank you very much
>
> --
> You received this message because you are subscribed to the Google Groups
> "Google Web Toolkit" group.
> To post to this group, send email to google-web-tool...@googlegroups.com.
> To unsubscribe from this group, send email to
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> .
> For more options, visit this group at
> http://groups.google.com/group/google-web-toolkit?hl=en.
>
>


-- 
Victor Llorens Vilella

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Re: newbie question, problem adding jar library

[Chris Lercher]

Hi,

adding it to the build path isn't enough in this case. The jar has to
be found by the server at runtime. To achieve this, you can put the
jar in the directory "war/WEB-INF/lib".

Chris

On Mar 11, 12:25 am, khalid  wrote:
> Hello every one
> I am making this simple application where the user fills some fields
> and makes an RPC to save these info
> in a DB anyway the server method uses the popular: Connection ,
> PreparedStatement ,... etc classes
> which are in the mysql-connector jar file "I think so ^_^ "
> I have followed these steps to add the library but no luck
>
> steps here:http://www.wikihow.com/Add-JARs-to-Project-Build-Paths-in-
> Eclipse-%28Java%29
>
> I still get java.lang.ClassNotFoundException: com.mysql.jdbc.Driver
> Can you please help me, I am new to GWT and I plan to use it for my
> Graduation project ^_^
> Thank you very much

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Re: Newbie question

[John Restrepo]

Ok, thanks again, due to short time I'll omit this part :(
At least I can work in web mode… thanks for everything ;)

On Sep 14, 11:27 am, Jason Parekh  wrote:
> No problem.
> Unfortunately, the issue you're now seeing will be harder to tackle.  
> Seehttp://code.google.com/p/google-web-toolkit/issues/detail?id=1792for a long
> discussion.  It looks like it was fixed in GWT 1.5, but I think there are
> some workarounds for older versions interspersed in that issue.  If
> possible, I'd recommend upgrading GWT ;)
>
> jason
>
> On Mon, Sep 14, 2009 at 12:19 PM, John Restrepo <
>
>
>
> johnjaime.restr...@gmail.com> wrote:
>
> > It worked! thanks a lot Jason, new thing learned :P
> > But now, I got this error when try to compile:
>
> > 2009-09-14 11:10:12.494 java[6097:80f] [Java CocoaComponent
> > compatibility mode]: Enabled
> > 2009-09-14 11:10:12.497 java[6097:80f] [Java CocoaComponent
> > compatibility mode]: Setting timeout for SWT to 0.10
> > Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException
> >        at apple.awt.CGraphicsEnvironment.displayChanged
> > (CGraphicsEnvironment.java:65)
> >        at apple.awt.CToolkit$4.run(CToolkit.java:1310)
> >        at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:209)
> >        at java.awt.EventQueue.dispatchEvent(EventQueue.java:461)
> >        at java.awt.EventDispatchThread.pumpOneEventForHierarchy
> > (EventDispatchThread.java:269)
> >        at java.awt.EventDispatchThread.pumpEventsForHierarchy
> > (EventDispatchThread.java:190)
> >        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:
> > 184)
> >        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:
> > 176)
> >        at java.awt.EventDispatchThread.run(EventDispatchThread.java:110)
> > Invalid memory access of location 0x0 eip=0x0
>
> > I have no idea what it means :\
>
> > On 14 sep, 09:20, Jason Parekh  wrote:
> > > Hey John,
> > > You can try to add the GWT 1.4 SDK:
>
> > > Go to your Eclipse preferences, then Google -> GWT on the side bar, and
> > then
> > > add another entry to the list box pointed to your GWT 1.4 SDK.
>
> > > After that, you'll want to create a new GWT project pointed at your
> > existing
> > > source code.
>
> > > Please let us know if you run into any issues.
>
> > > jason
>
> > > On Sun, Sep 13, 2009 at 11:51 AM, John Restrepo <
>
> > > johnjaime.restr...@gmail.com> wrote:
>
> > > > Hi guys, excuse me for the newbie question but I'm new with GWT.
> > > > I have to modify some widget with a suggestion box that interact with
> > > > a database, the thing is when I open it with Eclipse it doesn't
> > > > recognize anything "the import com.google cannot be resolved", maybe
> > > > the problem is that I'm modifying with GWT 1.7 and it's developed with
> > > > GWT 1.4, what can I do?
> > > > Thanks for the help in advance
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Re: Newbie question

[John Restrepo]

It worked! thanks a lot Jason, new thing learned :P
But now, I got this error when try to compile:

2009-09-14 11:10:12.494 java[6097:80f] [Java CocoaComponent
compatibility mode]: Enabled
2009-09-14 11:10:12.497 java[6097:80f] [Java CocoaComponent
compatibility mode]: Setting timeout for SWT to 0.10
Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException
at apple.awt.CGraphicsEnvironment.displayChanged
(CGraphicsEnvironment.java:65)
at apple.awt.CToolkit$4.run(CToolkit.java:1310)
at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:209)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:461)
at java.awt.EventDispatchThread.pumpOneEventForHierarchy
(EventDispatchThread.java:269)
at java.awt.EventDispatchThread.pumpEventsForHierarchy
(EventDispatchThread.java:190)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:
184)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:
176)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:110)
Invalid memory access of location 0x0 eip=0x0

I have no idea what it means :\

On 14 sep, 09:20, Jason Parekh  wrote:
> Hey John,
> You can try to add the GWT 1.4 SDK:
>
> Go to your Eclipse preferences, then Google -> GWT on the side bar, and then
> add another entry to the list box pointed to your GWT 1.4 SDK.
>
> After that, you'll want to create a new GWT project pointed at your existing
> source code.
>
> Please let us know if you run into any issues.
>
> jason
>
> On Sun, Sep 13, 2009 at 11:51 AM, John Restrepo <
>
>
>
> johnjaime.restr...@gmail.com> wrote:
>
> > Hi guys, excuse me for the newbie question but I'm new with GWT.
> > I have to modify some widget with a suggestion box that interact with
> > a database, the thing is when I open it with Eclipse it doesn't
> > recognize anything "the import com.google cannot be resolved", maybe
> > the problem is that I'm modifying with GWT 1.7 and it's developed with
> > GWT 1.4, what can I do?
> > Thanks for the help in advance
--~--~-~--~~~---~--~~
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Re: Newbie question

[Jason Parekh]

No problem.
Unfortunately, the issue you're now seeing will be harder to tackle.  See
http://code.google.com/p/google-web-toolkit/issues/detail?id=1792 for a long
discussion.  It looks like it was fixed in GWT 1.5, but I think there are
some workarounds for older versions interspersed in that issue.  If
possible, I'd recommend upgrading GWT ;)

jason

On Mon, Sep 14, 2009 at 12:19 PM, John Restrepo <
johnjaime.restr...@gmail.com> wrote:

>
> It worked! thanks a lot Jason, new thing learned :P
> But now, I got this error when try to compile:
>
> 2009-09-14 11:10:12.494 java[6097:80f] [Java CocoaComponent
> compatibility mode]: Enabled
> 2009-09-14 11:10:12.497 java[6097:80f] [Java CocoaComponent
> compatibility mode]: Setting timeout for SWT to 0.10
> Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException
>at apple.awt.CGraphicsEnvironment.displayChanged
> (CGraphicsEnvironment.java:65)
>at apple.awt.CToolkit$4.run(CToolkit.java:1310)
>at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:209)
>at java.awt.EventQueue.dispatchEvent(EventQueue.java:461)
>at java.awt.EventDispatchThread.pumpOneEventForHierarchy
> (EventDispatchThread.java:269)
>at java.awt.EventDispatchThread.pumpEventsForHierarchy
> (EventDispatchThread.java:190)
>at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:
> 184)
>at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:
> 176)
>at java.awt.EventDispatchThread.run(EventDispatchThread.java:110)
> Invalid memory access of location 0x0 eip=0x0
>
> I have no idea what it means :\
>
> On 14 sep, 09:20, Jason Parekh  wrote:
> > Hey John,
> > You can try to add the GWT 1.4 SDK:
> >
> > Go to your Eclipse preferences, then Google -> GWT on the side bar, and
> then
> > add another entry to the list box pointed to your GWT 1.4 SDK.
> >
> > After that, you'll want to create a new GWT project pointed at your
> existing
> > source code.
> >
> > Please let us know if you run into any issues.
> >
> > jason
> >
> > On Sun, Sep 13, 2009 at 11:51 AM, John Restrepo <
> >
> >
> >
> > johnjaime.restr...@gmail.com> wrote:
> >
> > > Hi guys, excuse me for the newbie question but I'm new with GWT.
> > > I have to modify some widget with a suggestion box that interact with
> > > a database, the thing is when I open it with Eclipse it doesn't
> > > recognize anything "the import com.google cannot be resolved", maybe
> > > the problem is that I'm modifying with GWT 1.7 and it's developed with
> > > GWT 1.4, what can I do?
> > > Thanks for the help in advance
> >
>

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Re: Newbie question

[Jason Parekh]

Hey John,
You can try to add the GWT 1.4 SDK:

Go to your Eclipse preferences, then Google -> GWT on the side bar, and then
add another entry to the list box pointed to your GWT 1.4 SDK.

After that, you'll want to create a new GWT project pointed at your existing
source code.

Please let us know if you run into any issues.

jason

On Sun, Sep 13, 2009 at 11:51 AM, John Restrepo <
johnjaime.restr...@gmail.com> wrote:

>
> Hi guys, excuse me for the newbie question but I'm new with GWT.
> I have to modify some widget with a suggestion box that interact with
> a database, the thing is when I open it with Eclipse it doesn't
> recognize anything "the import com.google cannot be resolved", maybe
> the problem is that I'm modifying with GWT 1.7 and it's developed with
> GWT 1.4, what can I do?
> Thanks for the help in advance
>
> >
>

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Re: Newbie question(File Permissions issue in GWT)

[Carl]

Web apps in general cannot access random files on the client machine,
which may (I'm not sure) have something to do with your problem.

To test this, try putting your file in a folder called public under
the same parent folder as your client and server folders.  This should
get copied to a folder having the same name as your application under
the war folder when you build your application (this is the folder
where the GWT-generated Javascript resides, wrapped in uniquely-named
HTML files).  You should then be able to load the file from your
application using an HTTP GET (e.g., using the GWT RequestBuilder
class).



On Jul 28, 8:26 am, Rumpole6  wrote:
> This may not be the right place for this, but:
>
> I am using the gwt plugin  in eclipse under Windows XP to write an
> small application and I am facing File Permission Errors trying to
> access files in the server code when I run my app in hosted mode. I
> suspect that there is an option to set somewhere which will allow me
> to access the files. The Files are located in C:\Documents and Settings
> \Barry\Application Data\Subversion.
>
> Thanks in advance.
>
> Barry
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Re: Newbie question(File Permissions issue in GWT)

[spike2...@googlemail.com]

Is it possible that "Barry" isn't your account?

On 28 Jul., 17:26, Rumpole6  wrote:
> This may not be the right place for this, but:
>
> I am using the gwt plugin  in eclipse under Windows XP to write an
> small application and I am facing File Permission Errors trying to
> access files in the server code when I run my app in hosted mode. I
> suspect that there is an option to set somewhere which will allow me
> to access the files. The Files are located in C:\Documents and Settings
> \Barry\Application Data\Subversion.
>
> Thanks in advance.
>
> Barry
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Re: Newbie Question. Windows 7 + Eclispe 3.4 + GWT 1.7 + Debug + Getting Started Tutorial.

[amanda apple]

*you cant open anything,, mail any of that if this is true,, replay back,, i
use a chat room that i can show u step by step.*

On Fri, Jul 24, 2009 at 4:44 PM, Howard Tan  wrote:

>
> Hi,
>
> I've been combing through the Getting Started guide, and I got
> everything to work except this page.
>
> http://code.google.com/webtoolkit/tutorials/1.6/debug.html
>
> I've followed the directions and it doesn't work. The tutorial runs
> normally and it doesn't break at the breakpoints. Anybody got any
> ideas? I must be doing something wrong, and it's probably something
> simple.
>
> Please help,
>
> Thanks,
> Howard
>
> >
>

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Re: Newbie Question. Windows 7 + Eclispe 3.4 + GWT 1.7 + Debug + Getting Started Tutorial.

[Howard Tan]

Excellent. It works as described. I've downgraded to jdk 1.6.0_13 from
jre 1.6.0_14.

Thanks!
Howard

On Jul 27, 7:40 am, Rajeev Dayal  wrote:
> There is an issue with JDK 1.6.0_14 and debugging. Are you using this JDK?
> If so, downgrade to 1.6.0_13 to workaround this problem.
>
>
>
> On Fri, Jul 24, 2009 at 5:44 PM, Howard Tan  wrote:
>
> > Hi,
>
> > I've been combing through the Getting Started guide, and I got
> > everything to work except this page.
>
> >http://code.google.com/webtoolkit/tutorials/1.6/debug.html
>
> > I've followed the directions and it doesn't work. The tutorial runs
> > normally and it doesn't break at the breakpoints. Anybody got any
> > ideas? I must be doing something wrong, and it's probably something
> > simple.
>
> > Please help,
>
> > Thanks,
> > Howard
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Re: Newbie Question. Windows 7 + Eclispe 3.4 + GWT 1.7 + Debug + Getting Started Tutorial.

[Rajeev Dayal]

There is an issue with JDK 1.6.0_14 and debugging. Are you using this JDK?
If so, downgrade to 1.6.0_13 to workaround this problem.

On Fri, Jul 24, 2009 at 5:44 PM, Howard Tan  wrote:

>
> Hi,
>
> I've been combing through the Getting Started guide, and I got
> everything to work except this page.
>
> http://code.google.com/webtoolkit/tutorials/1.6/debug.html
>
> I've followed the directions and it doesn't work. The tutorial runs
> normally and it doesn't break at the breakpoints. Anybody got any
> ideas? I must be doing something wrong, and it's probably something
> simple.
>
> Please help,
>
> Thanks,
> Howard
>
> >
>

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Re: Newbie question regarding web-application design

[Neha Chachra]

Thanks a lot for the suggestions. I tried them out to learn the methods. For
my project, I am going ahead with what Sky suggested. It's turning out much
better than my lazy XML Http requests :)
Thanks,

-neha
"nay-ha"

On Sun, Jul 12, 2009 at 10:41 AM, Sky  wrote:

>
> Given your description then to be honest I would agree you could do
> something better than XML HTTPrequest or Java RPC.
>
> But it seriously depends on how your app works and what your
> requirements are.
> What I would suggest is that you dump the data onto the page in the
> initial page request. Since the data rarely changes and IFF the client
> is unlikely to maintain a long session, then this might be a better
> approach. You would have to be ok with the fact that they won't get
> updated data until they hit the refresh button as opposed to clicking
> on the button leading to the "page" containing the 20 check boxes. If
> this is unacceptable and you require that when the user clicks on the
> menu button or w/e links them to that "page" will build the page
> afresh, then your current design is the only correct way (but as
> mentioned might be able to have improved performance via Java RPC)
>
> If its ok to just dump it to the initial page request, your server
> side code must simply modify the GWT html file, inserting the data as
> regular javascript, like an array of values or whatever it is.Your GWT
> code would need to interface to some handwritten Javascript that
> assumes the name of that javascript array exists and loads its
> contents. Pretty easy.
>
> hope this helps
>
> On Jul 10, 11:43 am, Kamal Chandana Mettananda 
> wrote:
> > Just to add to that; if you are using Java on your server side you may
> > be planning to use Servlets. If that's the case you can have a look at
> > the following tutorial.
> >
> > http://lkamal.blogspot.com/2008/09/java-gwt-servlets-web-app-tutorial...
> >
> > Cheers.
> >
> >
> >
> > On Fri, Jul 10, 2009 at 9:58 PM, Jim wrote:
> >
> > > If you plan to use Java for your server side, you don't have to use
> > > XML http requests. You can use the built-in RPC to retrieve Java
> > > objects from server and send to GWT clients or vice versa. That is a
> > > big advantage to stick to Java in server side. You can find an example
> > > inhttp://www.gwtorm.com/gwtMail.jsp.
> >
> > > Jim
> > >http://www.gwtorm.com
> > >http://code.google.com/p/dreamsource-orm/
> >
> > > On Jul 10, 10:54 am, Neha Chachra  wrote:
> > >> Hi,
> >
> > >> I started using GWT only about a week ago and I have rather little
> > >> experience with client-server interactions so I wish to make sure that
> I am
> > >> headed in the right direction. Though, I am guessing that the question
> is
> > >> not directly related to GWT and I apologize for that.
> >
> > >> Basically, I am making a webpage. Depending on the data in SQL server,
> I
> > >> need to render widgets on the page. As a simple example, if there are
> 20
> > >> data items, then I need to make 20 check boxes with the labels as
> retrieved
> > >> from the server.
> >
> > >> The data on the server changes rather infrequently.
> >
> > >> While I am able to do this currently, I have a feeling it's not the
> best
> > >> approach to the problem. I am making XML Http requests to the server,
> and
> > >> then I parse the data and render the widgets accordingly on the fly.
> >
> > >> I am wondering if that's a good solution... I am confused because it
> feels
> > >> like I have the data already, then I should be able to avoid data
> requests
> > >> and the consequent delay in rendering. But with this approach, I can't
> think
> > >> of a way to update the webpage appropriately if the data in the SQL
> server
> > >> changes.
> >
> > >> Any opinions/suggestions?
> >
> > >> Thanks a lot,
> >
> > >> Neha
> >
>

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Re: Newbie question regarding web-application design

[Sky]

Given your description then to be honest I would agree you could do
something better than XML HTTPrequest or Java RPC.

But it seriously depends on how your app works and what your
requirements are.
What I would suggest is that you dump the data onto the page in the
initial page request. Since the data rarely changes and IFF the client
is unlikely to maintain a long session, then this might be a better
approach. You would have to be ok with the fact that they won't get
updated data until they hit the refresh button as opposed to clicking
on the button leading to the "page" containing the 20 check boxes. If
this is unacceptable and you require that when the user clicks on the
menu button or w/e links them to that "page" will build the page
afresh, then your current design is the only correct way (but as
mentioned might be able to have improved performance via Java RPC)

If its ok to just dump it to the initial page request, your server
side code must simply modify the GWT html file, inserting the data as
regular javascript, like an array of values or whatever it is.Your GWT
code would need to interface to some handwritten Javascript that
assumes the name of that javascript array exists and loads its
contents. Pretty easy.

hope this helps

On Jul 10, 11:43 am, Kamal Chandana Mettananda 
wrote:
> Just to add to that; if you are using Java on your server side you may
> be planning to use Servlets. If that's the case you can have a look at
> the following tutorial.
>
> http://lkamal.blogspot.com/2008/09/java-gwt-servlets-web-app-tutorial...
>
> Cheers.
>
>
>
> On Fri, Jul 10, 2009 at 9:58 PM, Jim wrote:
>
> > If you plan to use Java for your server side, you don't have to use
> > XML http requests. You can use the built-in RPC to retrieve Java
> > objects from server and send to GWT clients or vice versa. That is a
> > big advantage to stick to Java in server side. You can find an example
> > inhttp://www.gwtorm.com/gwtMail.jsp.
>
> > Jim
> >http://www.gwtorm.com
> >http://code.google.com/p/dreamsource-orm/
>
> > On Jul 10, 10:54 am, Neha Chachra  wrote:
> >> Hi,
>
> >> I started using GWT only about a week ago and I have rather little
> >> experience with client-server interactions so I wish to make sure that I am
> >> headed in the right direction. Though, I am guessing that the question is
> >> not directly related to GWT and I apologize for that.
>
> >> Basically, I am making a webpage. Depending on the data in SQL server, I
> >> need to render widgets on the page. As a simple example, if there are 20
> >> data items, then I need to make 20 check boxes with the labels as retrieved
> >> from the server.
>
> >> The data on the server changes rather infrequently.
>
> >> While I am able to do this currently, I have a feeling it's not the best
> >> approach to the problem. I am making XML Http requests to the server, and
> >> then I parse the data and render the widgets accordingly on the fly.
>
> >> I am wondering if that's a good solution... I am confused because it feels
> >> like I have the data already, then I should be able to avoid data requests
> >> and the consequent delay in rendering. But with this approach, I can't 
> >> think
> >> of a way to update the webpage appropriately if the data in the SQL server
> >> changes.
>
> >> Any opinions/suggestions?
>
> >> Thanks a lot,
>
> >> Neha
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Re: Newbie question regarding web-application design

[Kamal Chandana Mettananda]

Just to add to that; if you are using Java on your server side you may
be planning to use Servlets. If that's the case you can have a look at
the following tutorial.

http://lkamal.blogspot.com/2008/09/java-gwt-servlets-web-app-tutorial.html

Cheers.



On Fri, Jul 10, 2009 at 9:58 PM, Jim wrote:
>
> If you plan to use Java for your server side, you don't have to use
> XML http requests. You can use the built-in RPC to retrieve Java
> objects from server and send to GWT clients or vice versa. That is a
> big advantage to stick to Java in server side. You can find an example
> in http://www.gwtorm.com/gwtMail.jsp.
>
> Jim
> http://www.gwtorm.com
> http://code.google.com/p/dreamsource-orm/
>
> On Jul 10, 10:54 am, Neha Chachra  wrote:
>> Hi,
>>
>> I started using GWT only about a week ago and I have rather little
>> experience with client-server interactions so I wish to make sure that I am
>> headed in the right direction. Though, I am guessing that the question is
>> not directly related to GWT and I apologize for that.
>>
>> Basically, I am making a webpage. Depending on the data in SQL server, I
>> need to render widgets on the page. As a simple example, if there are 20
>> data items, then I need to make 20 check boxes with the labels as retrieved
>> from the server.
>>
>> The data on the server changes rather infrequently.
>>
>> While I am able to do this currently, I have a feeling it's not the best
>> approach to the problem. I am making XML Http requests to the server, and
>> then I parse the data and render the widgets accordingly on the fly.
>>
>> I am wondering if that's a good solution... I am confused because it feels
>> like I have the data already, then I should be able to avoid data requests
>> and the consequent delay in rendering. But with this approach, I can't think
>> of a way to update the webpage appropriately if the data in the SQL server
>> changes.
>>
>> Any opinions/suggestions?
>>
>> Thanks a lot,
>>
>> Neha
> >
>

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Re: Newbie question regarding web-application design

[Jim]

If you plan to use Java for your server side, you don't have to use
XML http requests. You can use the built-in RPC to retrieve Java
objects from server and send to GWT clients or vice versa. That is a
big advantage to stick to Java in server side. You can find an example
in http://www.gwtorm.com/gwtMail.jsp.

Jim
http://www.gwtorm.com
http://code.google.com/p/dreamsource-orm/

On Jul 10, 10:54 am, Neha Chachra  wrote:
> Hi,
>
> I started using GWT only about a week ago and I have rather little
> experience with client-server interactions so I wish to make sure that I am
> headed in the right direction. Though, I am guessing that the question is
> not directly related to GWT and I apologize for that.
>
> Basically, I am making a webpage. Depending on the data in SQL server, I
> need to render widgets on the page. As a simple example, if there are 20
> data items, then I need to make 20 check boxes with the labels as retrieved
> from the server.
>
> The data on the server changes rather infrequently.
>
> While I am able to do this currently, I have a feeling it's not the best
> approach to the problem. I am making XML Http requests to the server, and
> then I parse the data and render the widgets accordingly on the fly.
>
> I am wondering if that's a good solution... I am confused because it feels
> like I have the data already, then I should be able to avoid data requests
> and the consequent delay in rendering. But with this approach, I can't think
> of a way to update the webpage appropriately if the data in the SQL server
> changes.
>
> Any opinions/suggestions?
>
> Thanks a lot,
>
> Neha
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Re: Newbie question re returning persisted objects via RPC to client

[Alejandro D. Garin]

Hi,

I wrote an example using gwt with java app engine.

http://puntosoft2k.appspot.com/gwt_gae_example.html

The example shows how to create, update, delete and retrieve objects from
app engine datastore to GWT client using RPC. The example use DTO approach.
Source code is available.

Hope that helps.
Regards,
Ale

On Sun, Jun 28, 2009 at 9:09 AM, Ben Daniel  wrote:

>
> Let's say I want to persist Animal objects using JDO and also want to
> return these Animal objects via a GWT RPC service. From what I
> understand GWT will compile a version of Animal in javascript on the
> client. And I take it that any JDO persistence stuff shouldn't be
> going down to the client.
>
> So do I have to create two separate classes for my Animal type: one
> used on the server for persistence via JDO and another which the
> client uses over RPC. Is this the normal thing to do?
>
> >
>

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Re: Newbie question re returning persisted objects via RPC to client

[Will]

I took a slightly different approach to option 1.

I created a interfaces that describe the Animal and made both the DTO
and GWT implement the interfaces.  This lets me control the
dependencies and ended up cutting down on the amount data I needed to
send to the browser.  I'm actually referring to a scheduling
application but to keep the Animal analogy I found that the majority
of components only needed to know the animal's species and age, not
every detail that was in the object.

On Jun 29, 12:34 am, Dalla  wrote:
> You would have to do it either like you suggested; create two separate
> classes,
> one "persistence" class, and then one DTO class.
>
> Or you could create just a POJO and keep the persistence info in a
> separate mapping file.
>
> From what I understand, most tend to go with the first option.
>
> On 28 Juni, 14:09, Ben Daniel  wrote:
>
> > Let's say I want to persist Animal objects using JDO and also want to
> > return these Animal objects via a GWT RPC service. From what I
> > understand GWT will compile a version of Animal in javascript on the
> > client. And I take it that any JDO persistence stuff shouldn't be
> > going down to the client.
>
> > So do I have to create two separate classes for my Animal type: one
> > used on the server for persistence via JDO and another which the
> > client uses over RPC. Is this the normal thing to do?
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Re: Newbie question re returning persisted objects via RPC to client

[Dalla]

You would have to do it either like you suggested; create two separate
classes,
one "persistence" class, and then one DTO class.

Or you could create just a POJO and keep the persistence info in a
separate mapping file.

>From what I understand, most tend to go with the first option.

On 28 Juni, 14:09, Ben Daniel  wrote:
> Let's say I want to persist Animal objects using JDO and also want to
> return these Animal objects via a GWT RPC service. From what I
> understand GWT will compile a version of Animal in javascript on the
> client. And I take it that any JDO persistence stuff shouldn't be
> going down to the client.
>
> So do I have to create two separate classes for my Animal type: one
> used on the server for persistence via JDO and another which the
> client uses over RPC. Is this the normal thing to do?
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Re: Newbie Question - Integrate GWT on Existing page

[Sean]

In the default application that is created using the webAppCreator.cmd
or the Eclipse plugin you will see they add specific elements to
specefic parts of the page.

In the HTML under the body you will see:

  
Please enter your
name:
  
  


  


Then in the corresponding GWT code you will see:
RootPanel.get("nameFieldContainer").add(nameField);
RootPanel.get("sendButtonContainer").add(sendButton);

So it's going to put those widgets in the .add() exactly where the id
is. So you could use the same idea to place your ticker exactly where
you want it. Hope this helps.


On Jun 24, 12:12 am, Andrew Myers  wrote:
> Thanks Pavel I will give it a try.
>
> I am going nuts with some Javascript libraries at the moment, and hopefully
> this will be much easier for me as a Java programmer :-)_
>
> 2009/6/24 Pavel Byles 
>
> > Sure it's feasible.
> > Just create ur GWT widget and include the *.nocache.js file in your html.
>
> > You can use GWT to place the widget anywhere on your page.
>
> > On Tue, Jun 23, 2009 at 10:32 PM, Andrew  wrote:
>
> >> Hi All,
>
> >> Is it possible to integrate GWT onto an existing page?
>
> >> For example, if I wanted to write a GWT news ticker or something
> >> similar and put it into a block on the homepage of an existing site,
> >> is this feasible?  And if so, are there any examples avialable?  Most
> >> of the examples I have found seem to pertain to when you are writing
> >> the whole app in GWT.
>
> >> Thanks!
>
> >> Andrew.
>
> > --
> > -Pav
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Re: Newbie Question - Integrate GWT on Existing page

[Andrew Myers]

Thanks Pavel I will give it a try.

I am going nuts with some Javascript libraries at the moment, and hopefully
this will be much easier for me as a Java programmer :-)_

2009/6/24 Pavel Byles 

> Sure it's feasible.
> Just create ur GWT widget and include the *.nocache.js file in your html.
>
> You can use GWT to place the widget anywhere on your page.
>
> On Tue, Jun 23, 2009 at 10:32 PM, Andrew  wrote:
>
>>
>> Hi All,
>>
>> Is it possible to integrate GWT onto an existing page?
>>
>> For example, if I wanted to write a GWT news ticker or something
>> similar and put it into a block on the homepage of an existing site,
>> is this feasible?  And if so, are there any examples avialable?  Most
>> of the examples I have found seem to pertain to when you are writing
>> the whole app in GWT.
>>
>> Thanks!
>>
>> Andrew.
>>
>>
>
>
> --
> -Pav
>
> >
>

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Re: Newbie Question - Integrate GWT on Existing page

[Pavel Byles]

Sure it's feasible.
Just create ur GWT widget and include the *.nocache.js file in your html.

You can use GWT to place the widget anywhere on your page.

On Tue, Jun 23, 2009 at 10:32 PM, Andrew  wrote:

>
> Hi All,
>
> Is it possible to integrate GWT onto an existing page?
>
> For example, if I wanted to write a GWT news ticker or something
> similar and put it into a block on the homepage of an existing site,
> is this feasible?  And if so, are there any examples avialable?  Most
> of the examples I have found seem to pertain to when you are writing
> the whole app in GWT.
>
> Thanks!
>
> Andrew.
> >
>


-- 
-Pav

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Re: Newbie question about war file deployment for Tomcat

[Jim]

In your ApplicationName.gwt.xml, there is an attribute rename like
, so you just try
http://localhost:8080/showcase/ApplicationName.html.


Jim
http://www.gwtorm.com
http://code.google.com/p/dreamsource-orm/

On May 12, 7:48 am, bartomas  wrote:
> Hi,
> I've generated a war file using GWT. I have placed it in the webapps
> folder of the tomcat directory (which is installed locally).
> How do I now start the application from a client browser?
> I have triedhttp://localhost:8080/ApplicationName
> but it doesnt work. I guess I'm missing something basic.
> Thanks very much for any help.
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Re: newbie question - link event handling

[Joe Hudson]

Thank you Vitali and Adam for you help, that is exactly what I needed to
know - I'll try it out.

Joe

On Sat, Apr 11, 2009 at 2:09 AM, Vitali Lovich  wrote:

> public class MyHyperlink extends Hyperlink
> {
>public MyHyperlink(Element e)
>{
> super(e);
>}
> }
>
> Then find the Element you want using DOM or gquery & pass it to your the
> constructor.  Not sure why it's protected in Hyperlink.  Then use the
> handlers/listeners as for a regular widget.
>
>
> On Sat, Apr 11, 2009 at 1:56 AM, Adam T  wrote:
>
>>
>> Hi Joe,
>>
>> Maybe the History class can help you here.  It allows you to pick a
>> "token" off the url and change you applications status appropriately -
>> a token is essentially everything after the hash (#)
>>
>> In the case where a user navigates to a url such as
>> http://gwt.google.com/samples/Mail/Mail.html#foo the token would be
>> "foo" and the history class would pick this up and act appropriately.
>> Similarly when you click on your hyperlink it would change the URL
>> from http://somthing to http://something#foo.
>>
>> A google search on gwt history should bring up a few tutorials (though
>> they will most likely use GWT 1.5 and not the new GWT 1.6 syntax, but
>> that should be OK for now - the new 1.6 syntax would use
>> ValueChangeHandler and the History.addValueChange() method
>> instead of HistoryListeners classes and History.addHistoryListener()
>> method - I'd suggest get used to the old approach before switching to
>> the new one)
>>
>> Hope that helps, at least a bit!
>>
>> //Adam
>>
>> On 10 Apr, 14:46, Joe Hudson  wrote:
>> > hello,
>> >
>> > I know this is a silly question but I haven't found a reference to
>> > this...
>> >
>> > If I have links within the html document but outside of the GWT
>> > application (see the #foo link below).  How can I (or, is this
>> > possible) to capture this event from within the GWT application?
>> >
>> >   
>> > how can I get this link event in the GWT app?
>> >
>> > > >   src='com.google.gwt.sample.mail.Mail.nocache.js'>
>> >   
>> >
>> > Also, if I am coming to the app for the first time and I provide a
>> > link likehttp://gwt.google.com/samples/Mail/Mail.html#foo
>> > How, in the app would I know that the foo name was passed?
>> >
>> > Thank you very much for the help.
>> >
>> > Joe
>>
>>
>
> >
>

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Re: newbie question - link event handling

[Vitali Lovich]

public class MyHyperlink extends Hyperlink
{
   public MyHyperlink(Element e)
   {
super(e);
   }
}

Then find the Element you want using DOM or gquery & pass it to your the
constructor.  Not sure why it's protected in Hyperlink.  Then use the
handlers/listeners as for a regular widget.

On Sat, Apr 11, 2009 at 1:56 AM, Adam T  wrote:

>
> Hi Joe,
>
> Maybe the History class can help you here.  It allows you to pick a
> "token" off the url and change you applications status appropriately -
> a token is essentially everything after the hash (#)
>
> In the case where a user navigates to a url such as
> http://gwt.google.com/samples/Mail/Mail.html#foo the token would be
> "foo" and the history class would pick this up and act appropriately.
> Similarly when you click on your hyperlink it would change the URL
> from http://somthing to http://something#foo.
>
> A google search on gwt history should bring up a few tutorials (though
> they will most likely use GWT 1.5 and not the new GWT 1.6 syntax, but
> that should be OK for now - the new 1.6 syntax would use
> ValueChangeHandler and the History.addValueChange() method
> instead of HistoryListeners classes and History.addHistoryListener()
> method - I'd suggest get used to the old approach before switching to
> the new one)
>
> Hope that helps, at least a bit!
>
> //Adam
>
> On 10 Apr, 14:46, Joe Hudson  wrote:
> > hello,
> >
> > I know this is a silly question but I haven't found a reference to
> > this...
> >
> > If I have links within the html document but outside of the GWT
> > application (see the #foo link below).  How can I (or, is this
> > possible) to capture this event from within the GWT application?
> >
> >   
> > how can I get this link event in the GWT app?
> >
> >  >   src='com.google.gwt.sample.mail.Mail.nocache.js'>
> >   
> >
> > Also, if I am coming to the app for the first time and I provide a
> > link likehttp://gwt.google.com/samples/Mail/Mail.html#foo
> > How, in the app would I know that the foo name was passed?
> >
> > Thank you very much for the help.
> >
> > Joe
> >
>

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Re: newbie question - link event handling

[Adam T]

Hi Joe,

Maybe the History class can help you here.  It allows you to pick a
"token" off the url and change you applications status appropriately -
a token is essentially everything after the hash (#)

In the case where a user navigates to a url such as
http://gwt.google.com/samples/Mail/Mail.html#foo the token would be
"foo" and the history class would pick this up and act appropriately.
Similarly when you click on your hyperlink it would change the URL
from http://somthing to http://something#foo.

A google search on gwt history should bring up a few tutorials (though
they will most likely use GWT 1.5 and not the new GWT 1.6 syntax, but
that should be OK for now - the new 1.6 syntax would use
ValueChangeHandler and the History.addValueChange() method
instead of HistoryListeners classes and History.addHistoryListener()
method - I'd suggest get used to the old approach before switching to
the new one)

Hope that helps, at least a bit!

//Adam

On 10 Apr, 14:46, Joe Hudson  wrote:
> hello,
>
> I know this is a silly question but I haven't found a reference to
> this...
>
> If I have links within the html document but outside of the GWT
> application (see the #foo link below).  How can I (or, is this
> possible) to capture this event from within the GWT application?
>
>   
>     how can I get this link event in the GWT app?
>
>            src='com.google.gwt.sample.mail.Mail.nocache.js'>
>   
>
> Also, if I am coming to the app for the first time and I provide a
> link likehttp://gwt.google.com/samples/Mail/Mail.html#foo
> How, in the app would I know that the foo name was passed?
>
> Thank you very much for the help.
>
> Joe
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Re: Newbie question

[redzedi]

Thanks Paul !!

On Apr 3, 7:03 pm, Paul Robinson  wrote:
> redzediwrote:
> > Hi All,
> >    Here are a couple of elementary questions, pardon me if they sound
> > very naive but i really really need to know the answer :-
>
> > 1. why do we need to do a setEndPoint on the client-side stub we get
> > from GWT.create() ??
>
> because you choose what the name of your servlet will be in your
> web.xml. It can't know what name you put in there.
>
> > 2. is the resultant stub as thus created threadsafe or is their any
> > kind of restrictions of its being used simultaneously i.e can i save a
> > reference of the stub as a static variable and call it from anywhere
> > in my code ??
>
> Client-side GWT code runs in the browser and is therefore single-threaded.
>
> Paul
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Re: Newbie question

[Paul Robinson]

redzedi wrote:
> Hi All,
>Here are a couple of elementary questions, pardon me if they sound
> very naive but i really really need to know the answer :-
>
> 1. why do we need to do a setEndPoint on the client-side stub we get
> from GWT.create() ??
>   
because you choose what the name of your servlet will be in your
web.xml. It can't know what name you put in there.

> 2. is the resultant stub as thus created threadsafe or is their any
> kind of restrictions of its being used simultaneously i.e can i save a
> reference of the stub as a static variable and call it from anywhere
> in my code ??
>
>   
Client-side GWT code runs in the browser and is therefore single-threaded.

Paul

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Re: Newbie Question on GWT/JSON

[Reinier Zwitserloot]

Whoops, forgot my footnote:

[1] http://www.ietf.org/rfc/rfc4627.txt

I don't know if that makes it official. I believe the official entity
that vets mime types is IANA, but on their site I couldn't quickly get
to an official list of recognized mime types. Still, if Doug Crockford
says the type is application/json, and almost everyone uses that,
that's the standard. That's how the internet works; standards bodies
can wax rhapsodic about whatever they fancy, but if no one does it,
it's not something you should be doing either, regardless of whether
or not its the 'official standard', so, there you have it.

Oh, and martykube: Be careful that your soul doesn't waft out the
window that is giving you that fresh air. As a general rule, if PHP is
a good fit for you, grails, rails, or django are usually an even
better fit.

On Jan 4, 11:48 pm, rakesh wagh  wrote:
> You probably got your answer by now. Think this way. JSON string is
> like any other string. The transport mechanism does not have to know
> weather it is json or text or number or binary or otherwise. With that
> said, you can use forms with get or post(knowing the advantages
> drawback of each will help you select the right mechanism) and simply
> posting it to your php page. In your php page, read the request
> parameters as if they were any other parameters.
>
> As a matter of fact you can even append the json string as part of
> your target page url with a variable name and expect the json string
> (with a hyperlink click) to reach its destination as expected.
>
> Good luck!
> Rakesh Wagh
>
> On Jan 3, 9:09 pm, Ian  wrote:
>
> > I am new to the Web application world; I am trying to encapsulate my
> > set of data in a JSONObject, convert to string, and send it  (async
> > POST) to a PHP page using GWT's RequestBuilder. GWT's tutorial
> > discusses the trip from the server back to the client and not the
> > other way around where I am unclear about.
>
> > Do I need to set the header? Currently I set it to:
> >  builder.setHeader("Content-Type", "application/x-www-form-
> > urlencoded");
>
> > However, this works fine as long as am sending
> > key1=value1&key2=values where I can retrieve variable via $_POST
> > ['key1'] or $_POST['key2']
>
> > But I am not sure how to send a JSON string where it can be retrieved
> > in a php page. I have tried sending myvar=MyJsonString but cannot
> > retrieve in my php page. How should $_POST reference the JSON object?
>
> > Any clarification would be much appreciated.
>
> > Thanks,
>
> > Ian
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Re: Newbie Question on GWT/JSON

[martykube]

On Jan 4, 2:32 am, Reinier Zwitserloot  wrote:
> Whatever possessed you to send the "application/x-www-form-
> urlencoded" as mime type?
> at all. Is file_get_contents("php://input"); really the only feasible
> way to get the entire body in PHP?

file_get_contents("php://input") is not the only way, but it is the
recommended way.

>
> Oh, PHP. Every single time someone posts a code snippet written in
> PHP, my aesthetic sense blows its brains out in sheer despair. And
> this one is up there, which is really saying something. I think its a
> conspiracy by the zend folks to make the inner child of developers
> worldwide die a little inside every time they come in contact with it.
> Sadistic bastards.
>

I'm using the same setup as Ian - GWT + JSON + PHP.  This is my first
contact with PHP.  After years of working on the bloated stack that is
JEE I've found PHP to be a breath of fresh air.  Sure, the aesthetics
are low, but the productivity is high.

Marty

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Re: Newbie Question on GWT/JSON

[rakesh wagh]

You probably got your answer by now. Think this way. JSON string is
like any other string. The transport mechanism does not have to know
weather it is json or text or number or binary or otherwise. With that
said, you can use forms with get or post(knowing the advantages
drawback of each will help you select the right mechanism) and simply
posting it to your php page. In your php page, read the request
parameters as if they were any other parameters.

As a matter of fact you can even append the json string as part of
your target page url with a variable name and expect the json string
(with a hyperlink click) to reach its destination as expected.

Good luck!
Rakesh Wagh

On Jan 3, 9:09 pm, Ian  wrote:
> I am new to the Web application world; I am trying to encapsulate my
> set of data in a JSONObject, convert to string, and send it  (async
> POST) to a PHP page using GWT's RequestBuilder. GWT's tutorial
> discusses the trip from the server back to the client and not the
> other way around where I am unclear about.
>
> Do I need to set the header? Currently I set it to:
>  builder.setHeader("Content-Type", "application/x-www-form-
> urlencoded");
>
> However, this works fine as long as am sending
> key1=value1&key2=values where I can retrieve variable via $_POST
> ['key1'] or $_POST['key2']
>
> But I am not sure how to send a JSON string where it can be retrieved
> in a php page. I have tried sending myvar=MyJsonString but cannot
> retrieve in my php page. How should $_POST reference the JSON object?
>
> Any clarification would be much appreciated.
>
> Thanks,
>
> Ian
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Re: Newbie Question on GWT/JSON

[Ian Petersen]

On Sun, Jan 4, 2009 at 11:31 PM, Reinier Zwitserloot  wrote:
> JSON's mimetype is "application/json" (see [1] below).

You missed the [1] below part and my interest is piqued.  Is
application/json an officially accepted MIME type?

> Oh, PHP. Every single time someone posts a code snippet written in
> PHP, my aesthetic sense blows its brains out in sheer despair. And
> this one is up there, which is really saying something. I think its a
> conspiracy by the zend folks to make the inner child of developers
> worldwide die a little inside every time they come in contact with it.
> Sadistic bastards.

Too bad the truth can be so inflammatory

Ian

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Re: Newbie Question on GWT/JSON

[Reinier Zwitserloot]

Whatever possessed you to send the "application/x-www-form-
urlencoded" as mime type?

JSON is nothing like form-encoded. That's like sending your HTML as
"image/jpeg" just for kicks. Don't do that.

JSON's mimetype is "application/json" (see [1] below). If you want to
be nice, you should actually set that in the header (as follows:
Content-type: application/json; encoding=UTF-8  - note that JSON is
defined to be UTF-8 encoded, so you're just clarifying there, you
can't pick your own encoding).

And, yes, of course, in PHP you would have to get the entire request
body, instead of letting PHP try to parse it as form data. Possibly
PHP is presuming that the data IS form encoded when there is no header
at all. Is file_get_contents("php://input"); really the only feasible
way to get the entire body in PHP?

Oh, PHP. Every single time someone posts a code snippet written in
PHP, my aesthetic sense blows its brains out in sheer despair. And
this one is up there, which is really saying something. I think its a
conspiracy by the zend folks to make the inner child of developers
worldwide die a little inside every time they come in contact with it.
Sadistic bastards.



On Jan 4, 6:52 am, Ian  wrote:
> For those who might be facing a similar problem and others who might
> be interested in my previous question I have come up with an answer.
> First my disclaimer: the solution below may not be the proper one but
> it does work. Now on to the solution:
>
> On the GWT Client Side:
>
> JSONObject jObject = new JSONObject();
> jObject .put("propA", new JSONString("valA"));
> jObject .put(...
>
> RequestBuilder builder = new RequestBuilder(RequestBuilder.POST,
> YOUR_PHP_URL);
> builder.sendRequest(jObject.toString(), new YourReponseHandler());
>
> Note that there is no setHeader.
>
> On the PHP side:
>
> Get the raw data instead of $_POST
> $jsonReq = file_get_contents("php://input");
>
> Decode the json request
> $request = json_decode($jsonReq);
>
> Cheers,
> Ian
>
> On Jan 3, 10:09 pm, Ian  wrote:
>
> > I am new to the Web application world; I am trying to encapsulate my
> > set of data in a JSONObject, convert to string, and send it  (async
> > POST) to a PHP page using GWT's RequestBuilder. GWT's tutorial
> > discusses the trip from the server back to the client and not the
> > other way around where I am unclear about.
>
> > Do I need to set the header? Currently I set it to:
> >  builder.setHeader("Content-Type", "application/x-www-form-
> > urlencoded");
>
> > However, this works fine as long as am sending
> > key1=value1&key2=values where I can retrieve variable via $_POST
> > ['key1'] or $_POST['key2']
>
> > But I am not sure how to send a JSON string where it can be retrieved
> > in a php page. I have tried sending myvar=MyJsonString but cannot
> > retrieve in my php page. How should $_POST reference the JSON object?
>
> > Any clarification would be much appreciated.
>
> > Thanks,
>
> > Ian
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Re: Newbie Question on GWT/JSON

[Ian]

For those who might be facing a similar problem and others who might
be interested in my previous question I have come up with an answer.
First my disclaimer: the solution below may not be the proper one but
it does work. Now on to the solution:

On the GWT Client Side:

JSONObject jObject = new JSONObject();
jObject .put("propA", new JSONString("valA"));
jObject .put(...

RequestBuilder builder = new RequestBuilder(RequestBuilder.POST,
YOUR_PHP_URL);
builder.sendRequest(jObject.toString(), new YourReponseHandler());

Note that there is no setHeader.

On the PHP side:

Get the raw data instead of $_POST
$jsonReq = file_get_contents("php://input");

Decode the json request
$request = json_decode($jsonReq);

Cheers,
Ian


On Jan 3, 10:09 pm, Ian  wrote:
> I am new to the Web application world; I am trying to encapsulate my
> set of data in a JSONObject, convert to string, and send it  (async
> POST) to a PHP page using GWT's RequestBuilder. GWT's tutorial
> discusses the trip from the server back to the client and not the
> other way around where I am unclear about.
>
> Do I need to set the header? Currently I set it to:
>  builder.setHeader("Content-Type", "application/x-www-form-
> urlencoded");
>
> However, this works fine as long as am sending
> key1=value1&key2=values where I can retrieve variable via $_POST
> ['key1'] or $_POST['key2']
>
> But I am not sure how to send a JSON string where it can be retrieved
> in a php page. I have tried sending myvar=MyJsonString but cannot
> retrieve in my php page. How should $_POST reference the JSON object?
>
> Any clarification would be much appreciated.
>
> Thanks,
>
> Ian
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Re: Newbie question - GWT not creating files in Hosted mode.

[fancyplants]

Doh, thanks Thomas,  schoolboy error!

On Oct 10, 9:24 am, Thomas Broyer <[EMAIL PROTECTED]> wrote:
> On 9 oct, 13:24, fancyplants <[EMAIL PROTECTED]> wrote:
>
> > [WARN] Resource not found: com.app.gwt.client.Main.nocache.js; (could
> > a file be missing from the public path or a  tag
> > misconfigured in module com.app.gwt.Main.gwt.xml ?)
>
> [...]
>
> >      > src="com.app.gwt.client.Main.nocache.js">
>
> Your module is named com.app.gwt.Main, not com.app.gwt.client.Main
> (which happens to be the name of your module's EntryPoint)
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Re: Newbie question - GWT not creating files in Hosted mode.

[Thomas Broyer]

On 9 oct, 13:24, fancyplants <[EMAIL PROTECTED]> wrote:
> [WARN] Resource not found: com.app.gwt.client.Main.nocache.js; (could
> a file be missing from the public path or a  tag
> misconfigured in module com.app.gwt.Main.gwt.xml ?)

[...]

>      src="com.app.gwt.client.Main.nocache.js">

Your module is named com.app.gwt.Main, not com.app.gwt.client.Main
(which happens to be the name of your module's EntryPoint)


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Re: Newbie question - adding GWT to my existing application

[Suri]

Hi Walden
Did what you said and also modified the xxx-compile.cmd file to add
the class path for the gwt.xml file

so the new class path is

@java -Xmx256M -cp "%~dp0\src;%~dp0\bin;C:/app/src/package/subpackage/
subpackage.gwt.xml;C:/.../gwt-user.jar;C:/.../gwt-dev-windows.jar"
com.google.gwt.dev.GWTCompiler -out "%~dp0\www" %*
package1.subpackage.gwt.client.Gwt_test

And the Gwt_test.gwt.xml has been modified to include the line


  


Upon running this I get the following error

Loading module 'package1.subpackage.gwt.client.Gwt_test'
   Loading inherited module
'src.package.subpackage.subpackage.gwt.xml'
  [ERROR] Unable to find 'src/package/subpackage/
subpackage.gwt.xml' on your classpath; could be a typo
, or maybe you forgot to include a classpath entry for source?
   [ERROR] Line 4: Unexpected exception while processing element
'inherits'
com.google.gwt.core.ext.UnableToCompleteException: (see previous log
entries)

Is the classpath being set wrongly?

On Oct 2, 9:21 am, Suri <[EMAIL PROTECTED]> wrote:
> Ah, gotcha. Thanks Walden. I had the initial idea of having the '.'
> But then refrained thinking I could point to the single class. I mis-
> understood the first reply then. Thanks for the reply to the second
> question as well. I'll go ahead and see how this works out. Appreciate
> the patience.
>
> Suri
>
> On Oct 2, 8:28 am, walden <[EMAIL PROTECTED]> wrote:
>
> > Suri,
>
> > Let's take it one step at a time.  The first problem is your source
> > directive.  It should look like this:
>
> > 
>
> > The path is the folder at the root of a hierarchy, not a single file.
> > Since your path was defective, the Client1 source was not found, and
> > that caused the import statement to fail the compile.  The rest of the
> > diagnostics you can just ignore.
>
> > As for you later question, GWT does need the Java source (and does not
> > need the .class files).  GWT does have a limitation that inherited
> > source needs to be packaged for inheritance.  You can't just throw
> > arbitrary jars at a GWT compile the way you can in actual Java.
> > That's because of the limitations inherent in compiling to Javascript.
>
> > Walden
>
> > On Oct 1, 4:51 pm, Suri <[EMAIL PROTECTED]> wrote:
>
> > > Hi Walden,
>
> > > Here's what I did:
>
> > > 1) My current project is set up with the source code as
>
> > > *project
> > >   - webroot (all JSP, WEB-INF, etc lie here)
> > >   - src
> > >      - package
> > >           - subpackage
> > >                    - Class1
> > >                   -  Class2
> > >                    - subpackage2
> > >                         - Class3*
>
> > > So now when adding GWT here's what i did:
>
> > > 1) I ran the applicationCreator command under the project directory,
> > > so if
> > > the name of my GWT module is going to be gwt_test
>
> > > *project
> > >   - webroot
> > >   - src
> > >   - gwt_test
> > > *
> > > So in order to import Class1, i created a subpackage.gwt.xml  under
> > > the
> > > subpackage directory
> > > *     - subpackage
> > >         - subpackage.gwt.xml
> > >         - Class1
> > >         - Class2*
>
> > > The contents of this were
>
> > > *
> > >       
> > > *
>
> > > Now in my GWT module
>
> > > gwt_test
> > >   - src
> > >       - package1
> > >             - subpackage
> > >                  - gwt
> > >                        - client
> > >                              - Gwt_test.java
>
> > > I added the import statement to the Gwt_test.java  as a regular
> > > import  -
> > > "import package.subpackage.Class1"
> > > I modified the class path of gwt_test-compile.cmd to contain the
> > > additional
> > > path to the  subpackage.gwt.xml i.e  *C:/./subpackage.gwt.xml *
>
> > > Upon trying to GWT compile this, i still get the error
>
> > > Removing units with errors
> > >    [ERROR] Errors in
> > > 'file:/C:/eclipse_workspace/project/gwt_test/src/package1/
> > > subpackage.gwt.client.Gwt_test.java'
> > >       [ERROR] Line 12: The import package.subpackage.Class1 cannot be
> > > resolved
> > > Compiling module package1.subpackage.gwt.client.Gwt_test
> > > Computing all possible rebind results for
> > > 'package1.subpackage.gwt.client.Gwt_test'
> > >    Rebinding package1.subpackage.gwt.client.Gwt_test.java
> > >       Checking rule  > > class='com.google.gwt.user.rebind.ui.ImageBundleGenerator'/>
> > >          [ERROR] Unable to find type
> > > 'package1.subpackage.gwt.client.Gwt_test'
> > >             [ERROR] Hint: Previous compiler errors may have made this
> > > type
> > > unavailable
> > >             [ERROR] Hint: Check the inheritance chain from your
> > > module; it
> > > may not be inheriting a r
> > > equired module or a module may not be adding its source path entries
> > > properly
> > > [ERROR] Build failed
>
> > > Actual class names have been substituted for privacy. Let me know what
> > > I'm
> > > doing wrong.
> > > Also additionally, I'd still like to know how to deal with this if I
> > > had to
> > > be importing from a jar. I

Re: Newbie question - adding GWT to my existing application

[Suri]

An updated attempt..

I changed my classpath to point to the applications 'src' folder and
not the file directly and updated the Gwt_test.gwt.xml file to include
the line as





Now when trying to compile I get this error

Loading module 'package1.subpackage.gwt.client.Gwt_test'
   Loading inherited module 'package.subpackage.subpackage'
  [WARN] Non-canonical source package: ./
Removing units with errors
   [ERROR] Errors in 'file:/C:/../gwt/client/Gwt_test.java'
  [ERROR] Line 11: The import Class1 cannot be resolved
Compiling module package1.subpackage.gwt.Gwt_test
Computing all possible rebind results for
'package1.subpackage.gwt.client.Gwt_test'
   Rebinding package1.subpackage.gwt.client.Gwt_test
  Checking rule 
 [ERROR] Unable to find type
'package1.subpackage.gwt.client.Gwt_test'
[ERROR] Hint: Previous compiler errors may have made this
type unavailable
[ERROR] Hint: Check the inheritance chain from your
module; it may not be inheriting a r
equired module or a module may not be adding its source path entries
properly
[ERROR] Build failed


Seems like it went a bit ahead except I'm not sure what the problem is
now.

On Oct 2, 9:21 am, Suri <[EMAIL PROTECTED]> wrote:
> Ah, gotcha. Thanks Walden. I had the initial idea of having the '.'
> But then refrained thinking I could point to the single class. I mis-
> understood the first reply then. Thanks for the reply to the second
> question as well. I'll go ahead and see how this works out. Appreciate
> the patience.
>
> Suri
>
> On Oct 2, 8:28 am, walden <[EMAIL PROTECTED]> wrote:
>
> > Suri,
>
> > Let's take it one step at a time.  The first problem is your source
> > directive.  It should look like this:
>
> > 
>
> > The path is the folder at the root of a hierarchy, not a single file.
> > Since your path was defective, the Client1 source was not found, and
> > that caused the import statement to fail the compile.  The rest of the
> > diagnostics you can just ignore.
>
> > As for you later question, GWT does need the Java source (and does not
> > need the .class files).  GWT does have a limitation that inherited
> > source needs to be packaged for inheritance.  You can't just throw
> > arbitrary jars at a GWT compile the way you can in actual Java.
> > That's because of the limitations inherent in compiling to Javascript.
>
> > Walden
>
> > On Oct 1, 4:51 pm, Suri <[EMAIL PROTECTED]> wrote:
>
> > > Hi Walden,
>
> > > Here's what I did:
>
> > > 1) My current project is set up with the source code as
>
> > > *project
> > >   - webroot (all JSP, WEB-INF, etc lie here)
> > >   - src
> > >      - package
> > >           - subpackage
> > >                    - Class1
> > >                   -  Class2
> > >                    - subpackage2
> > >                         - Class3*
>
> > > So now when adding GWT here's what i did:
>
> > > 1) I ran the applicationCreator command under the project directory,
> > > so if
> > > the name of my GWT module is going to be gwt_test
>
> > > *project
> > >   - webroot
> > >   - src
> > >   - gwt_test
> > > *
> > > So in order to import Class1, i created a subpackage.gwt.xml  under
> > > the
> > > subpackage directory
> > > *     - subpackage
> > >         - subpackage.gwt.xml
> > >         - Class1
> > >         - Class2*
>
> > > The contents of this were
>
> > > *
> > >       
> > > *
>
> > > Now in my GWT module
>
> > > gwt_test
> > >   - src
> > >       - package1
> > >             - subpackage
> > >                  - gwt
> > >                        - client
> > >                              - Gwt_test.java
>
> > > I added the import statement to the Gwt_test.java  as a regular
> > > import  -
> > > "import package.subpackage.Class1"
> > > I modified the class path of gwt_test-compile.cmd to contain the
> > > additional
> > > path to the  subpackage.gwt.xml i.e  *C:/./subpackage.gwt.xml *
>
> > > Upon trying to GWT compile this, i still get the error
>
> > > Removing units with errors
> > >    [ERROR] Errors in
> > > 'file:/C:/eclipse_workspace/project/gwt_test/src/package1/
> > > subpackage.gwt.client.Gwt_test.java'
> > >       [ERROR] Line 12: The import package.subpackage.Class1 cannot be
> > > resolved
> > > Compiling module package1.subpackage.gwt.client.Gwt_test
> > > Computing all possible rebind results for
> > > 'package1.subpackage.gwt.client.Gwt_test'
> > >    Rebinding package1.subpackage.gwt.client.Gwt_test.java
> > >       Checking rule  > > class='com.google.gwt.user.rebind.ui.ImageBundleGenerator'/>
> > >          [ERROR] Unable to find type
> > > 'package1.subpackage.gwt.client.Gwt_test'
> > >             [ERROR] Hint: Previous compiler errors may have made this
> > > type
> > > unavailable
> > >             [ERROR] Hint: Check the inheritance chain from your
> > > module; it
> > > may not be inheriting a r
> > > equired module or a module may not be adding its source path entries
> > > properly
> > > [ERROR] Build failed
>
> > > Actual c

Re: Newbie question - adding GWT to my existing application

[Suri]

Ah, gotcha. Thanks Walden. I had the initial idea of having the '.'
But then refrained thinking I could point to the single class. I mis-
understood the first reply then. Thanks for the reply to the second
question as well. I'll go ahead and see how this works out. Appreciate
the patience.


Suri

On Oct 2, 8:28 am, walden <[EMAIL PROTECTED]> wrote:
> Suri,
>
> Let's take it one step at a time.  The first problem is your source
> directive.  It should look like this:
>
> 
>
> The path is the folder at the root of a hierarchy, not a single file.
> Since your path was defective, the Client1 source was not found, and
> that caused the import statement to fail the compile.  The rest of the
> diagnostics you can just ignore.
>
> As for you later question, GWT does need the Java source (and does not
> need the .class files).  GWT does have a limitation that inherited
> source needs to be packaged for inheritance.  You can't just throw
> arbitrary jars at a GWT compile the way you can in actual Java.
> That's because of the limitations inherent in compiling to Javascript.
>
> Walden
>
> On Oct 1, 4:51 pm, Suri <[EMAIL PROTECTED]> wrote:
>
> > Hi Walden,
>
> > Here's what I did:
>
> > 1) My current project is set up with the source code as
>
> > *project
> >   - webroot (all JSP, WEB-INF, etc lie here)
> >   - src
> >      - package
> >           - subpackage
> >                    - Class1
> >                   -  Class2
> >                    - subpackage2
> >                         - Class3*
>
> > So now when adding GWT here's what i did:
>
> > 1) I ran the applicationCreator command under the project directory,
> > so if
> > the name of my GWT module is going to be gwt_test
>
> > *project
> >   - webroot
> >   - src
> >   - gwt_test
> > *
> > So in order to import Class1, i created a subpackage.gwt.xml  under
> > the
> > subpackage directory
> > *     - subpackage
> >         - subpackage.gwt.xml
> >         - Class1
> >         - Class2*
>
> > The contents of this were
>
> > *
> >       
> > *
>
> > Now in my GWT module
>
> > gwt_test
> >   - src
> >       - package1
> >             - subpackage
> >                  - gwt
> >                        - client
> >                              - Gwt_test.java
>
> > I added the import statement to the Gwt_test.java  as a regular
> > import  -
> > "import package.subpackage.Class1"
> > I modified the class path of gwt_test-compile.cmd to contain the
> > additional
> > path to the  subpackage.gwt.xml i.e  *C:/./subpackage.gwt.xml *
>
> > Upon trying to GWT compile this, i still get the error
>
> > Removing units with errors
> >    [ERROR] Errors in
> > 'file:/C:/eclipse_workspace/project/gwt_test/src/package1/
> > subpackage.gwt.client.Gwt_test.java'
> >       [ERROR] Line 12: The import package.subpackage.Class1 cannot be
> > resolved
> > Compiling module package1.subpackage.gwt.client.Gwt_test
> > Computing all possible rebind results for
> > 'package1.subpackage.gwt.client.Gwt_test'
> >    Rebinding package1.subpackage.gwt.client.Gwt_test.java
> >       Checking rule  > class='com.google.gwt.user.rebind.ui.ImageBundleGenerator'/>
> >          [ERROR] Unable to find type
> > 'package1.subpackage.gwt.client.Gwt_test'
> >             [ERROR] Hint: Previous compiler errors may have made this
> > type
> > unavailable
> >             [ERROR] Hint: Check the inheritance chain from your
> > module; it
> > may not be inheriting a r
> > equired module or a module may not be adding its source path entries
> > properly
> > [ERROR] Build failed
>
> > Actual class names have been substituted for privacy. Let me know what
> > I'm
> > doing wrong.
> > Also additionally, I'd still like to know how to deal with this if I
> > had to
> > be importing from a jar. I ask, because ideally I do not want to be
> > disturbing the current code structure too much and for curiosity I'd
> > like to
> > know the limitation of GWT with this regard. When I do import from a
> > jar,
> > does the jar being used need to have the source files as well as the
> > class
> > files for the project. So for example if I was trying to use some 3rd
> > party
> > or open source jar, then how would this work because most of the time
> > we'd
> > be downloading and using binaries right.
>
> > Thanks
> > Suri
>
> > - Hide quoted text -
> > - Show quoted text -
>
> > On Sep 29, 8:47 am, walden <[EMAIL PROTECTED]> wrote:
>
> > > Suri,
>
> > > If the current Java code is in the same project where you are adding
> > > GWT on the client, you don't need a jar.
>
> > > Your current Java code does have to be sanitized to meet the 'closed
> > > world' requirements of the GWT compiler.  Read the documentation on
> > > the GWT compiler and JRE emulation classes for details.
>
> > > Your current Java code will have to be findable by the GWT compiler,
> > > which means there must be a .gwt.xml file on the classpath when you
> > > run the GWT compiler (you'll need to create that), and it needs to
> > > indicate where

Re: Newbie question - adding GWT to my existing application

[walden]

Suri,

Let's take it one step at a time.  The first problem is your source
directive.  It should look like this:



The path is the folder at the root of a hierarchy, not a single file.
Since your path was defective, the Client1 source was not found, and
that caused the import statement to fail the compile.  The rest of the
diagnostics you can just ignore.

As for you later question, GWT does need the Java source (and does not
need the .class files).  GWT does have a limitation that inherited
source needs to be packaged for inheritance.  You can't just throw
arbitrary jars at a GWT compile the way you can in actual Java.
That's because of the limitations inherent in compiling to Javascript.

Walden

On Oct 1, 4:51 pm, Suri <[EMAIL PROTECTED]> wrote:
> Hi Walden,
>
> Here's what I did:
>
> 1) My current project is set up with the source code as
>
> *project
>   - webroot (all JSP, WEB-INF, etc lie here)
>   - src
>      - package
>           - subpackage
>                    - Class1
>                   -  Class2
>                    - subpackage2
>                         - Class3*
>
> So now when adding GWT here's what i did:
>
> 1) I ran the applicationCreator command under the project directory,
> so if
> the name of my GWT module is going to be gwt_test
>
> *project
>   - webroot
>   - src
>   - gwt_test
> *
> So in order to import Class1, i created a subpackage.gwt.xml  under
> the
> subpackage directory
> *     - subpackage
>         - subpackage.gwt.xml
>         - Class1
>         - Class2*
>
> The contents of this were
>
> *
>       
> *
>
> Now in my GWT module
>
> gwt_test
>   - src
>       - package1
>             - subpackage
>                  - gwt
>                        - client
>                              - Gwt_test.java
>
> I added the import statement to the Gwt_test.java  as a regular
> import  -
> "import package.subpackage.Class1"
> I modified the class path of gwt_test-compile.cmd to contain the
> additional
> path to the  subpackage.gwt.xml i.e  *C:/./subpackage.gwt.xml *
>
> Upon trying to GWT compile this, i still get the error
>
> Removing units with errors
>    [ERROR] Errors in
> 'file:/C:/eclipse_workspace/project/gwt_test/src/package1/
> subpackage.gwt.client.Gwt_test.java'
>       [ERROR] Line 12: The import package.subpackage.Class1 cannot be
> resolved
> Compiling module package1.subpackage.gwt.client.Gwt_test
> Computing all possible rebind results for
> 'package1.subpackage.gwt.client.Gwt_test'
>    Rebinding package1.subpackage.gwt.client.Gwt_test.java
>       Checking rule  class='com.google.gwt.user.rebind.ui.ImageBundleGenerator'/>
>          [ERROR] Unable to find type
> 'package1.subpackage.gwt.client.Gwt_test'
>             [ERROR] Hint: Previous compiler errors may have made this
> type
> unavailable
>             [ERROR] Hint: Check the inheritance chain from your
> module; it
> may not be inheriting a r
> equired module or a module may not be adding its source path entries
> properly
> [ERROR] Build failed
>
> Actual class names have been substituted for privacy. Let me know what
> I'm
> doing wrong.
> Also additionally, I'd still like to know how to deal with this if I
> had to
> be importing from a jar. I ask, because ideally I do not want to be
> disturbing the current code structure too much and for curiosity I'd
> like to
> know the limitation of GWT with this regard. When I do import from a
> jar,
> does the jar being used need to have the source files as well as the
> class
> files for the project. So for example if I was trying to use some 3rd
> party
> or open source jar, then how would this work because most of the time
> we'd
> be downloading and using binaries right.
>
> Thanks
> Suri
>
> - Hide quoted text -
> - Show quoted text -
>
> On Sep 29, 8:47 am, walden <[EMAIL PROTECTED]> wrote:
>
>
>
> > Suri,
>
> > If the current Java code is in the same project where you are adding
> > GWT on the client, you don't need a jar.
>
> > Your current Java code does have to be sanitized to meet the 'closed
> > world' requirements of the GWT compiler.  Read the documentation on
> > the GWT compiler and JRE emulation classes for details.
>
> > Your current Java code will have to be findable by the GWT compiler,
> > which means there must be a .gwt.xml file on the classpath when you
> > run the GWT compiler (you'll need to create that), and it needs to
> > indicate where the compile sources are.  There are basically two ways
> > to approach this part:
>
> > 1. keep your sources exactly where they are; place your Pkg1.gwt.xml
> > file in the root folder of the smallest containing sub-tree for all
> > the classes you need to include, and use the  tag as
> > many times as necessary to indicate (and hopefully isolate) just the
> > classes you want compiled by GWT.
>
> > 2. do a little folder reorganization so that the classes you will
> > share between server and client side are isolated cleanly; have a
> > 'client' folder at the root of that sub-tree, 

Re: Newbie question - adding GWT to my existing application

[Suri]

Hi Walden,

Here's what I did:

1) My current project is set up with the source code as

*project
  - webroot (all JSP, WEB-INF, etc lie here)
  - src
 - package
  - subpackage
   - Class1
  -  Class2
   - subpackage2
- Class3*

So now when adding GWT here's what i did:

1) I ran the applicationCreator command under the project directory,
so if
the name of my GWT module is going to be gwt_test

*project
  - webroot
  - src
  - gwt_test
*
So in order to import Class1, i created a subpackage.gwt.xml  under
the
subpackage directory
* - subpackage
- subpackage.gwt.xml
- Class1
- Class2*

The contents of this were

*
  
*

Now in my GWT module

gwt_test
  - src
  - package1
- subpackage
 - gwt
   - client
 - Gwt_test.java

I added the import statement to the Gwt_test.java  as a regular
import  -
"import package.subpackage.Class1"
I modified the class path of gwt_test-compile.cmd to contain the
additional
path to the  subpackage.gwt.xml i.e  *C:/./subpackage.gwt.xml *

Upon trying to GWT compile this, i still get the error

Removing units with errors
   [ERROR] Errors in
'file:/C:/eclipse_workspace/project/gwt_test/src/package1/
subpackage.gwt.client.Gwt_test.java'
  [ERROR] Line 12: The import package.subpackage.Class1 cannot be
resolved
Compiling module package1.subpackage.gwt.client.Gwt_test
Computing all possible rebind results for
'package1.subpackage.gwt.client.Gwt_test'
   Rebinding package1.subpackage.gwt.client.Gwt_test.java
  Checking rule 
 [ERROR] Unable to find type
'package1.subpackage.gwt.client.Gwt_test'
[ERROR] Hint: Previous compiler errors may have made this
type
unavailable
[ERROR] Hint: Check the inheritance chain from your
module; it
may not be inheriting a r
equired module or a module may not be adding its source path entries
properly
[ERROR] Build failed

Actual class names have been substituted for privacy. Let me know what
I'm
doing wrong.
Also additionally, I'd still like to know how to deal with this if I
had to
be importing from a jar. I ask, because ideally I do not want to be
disturbing the current code structure too much and for curiosity I'd
like to
know the limitation of GWT with this regard. When I do import from a
jar,
does the jar being used need to have the source files as well as the
class
files for the project. So for example if I was trying to use some 3rd
party
or open source jar, then how would this work because most of the time
we'd
be downloading and using binaries right.

Thanks
Suri

- Hide quoted text -
- Show quoted text -

On Sep 29, 8:47 am, walden <[EMAIL PROTECTED]> wrote:
> Suri,
>
> If the current Java code is in the same project where you are adding
> GWT on the client, you don't need a jar.
>
> Your current Java code does have to be sanitized to meet the 'closed
> world' requirements of the GWT compiler.  Read the documentation on
> the GWT compiler and JRE emulation classes for details.
>
> Your current Java code will have to be findable by the GWT compiler,
> which means there must be a .gwt.xml file on the classpath when you
> run the GWT compiler (you'll need to create that), and it needs to
> indicate where the compile sources are.  There are basically two ways
> to approach this part:
>
> 1. keep your sources exactly where they are; place your Pkg1.gwt.xml
> file in the root folder of the smallest containing sub-tree for all
> the classes you need to include, and use the  tag as
> many times as necessary to indicate (and hopefully isolate) just the
> classes you want compiled by GWT.
>
> 2. do a little folder reorganization so that the classes you will
> share between server and client side are isolated cleanly; have a
> 'client' folder at the root of that sub-tree, and place your
> Pkg1.gwt.xml file as a direct sibling to the client folder.  Then you
> don't need  tags.
>
> Try that, report any errors you get, and we'll sort it out from there.
>
> Walden
>
> On Sep 27, 3:30 pm, Suri <[EMAIL PROTECTED]> wrote:
>
> > Hi All,
> > I'm a GWT newbie and I've just come fresh after reading up the basics
> > from the Google GWT tutorial. Here's my situation:
>
> > I have an existing Java based web application (Struts based). Now I'm
> > trying to add a new module to it and figure I'd try to incorporate GWT
> > - mostly because I expect the new module to be a few very dynamic
> > pages communicating with the server often.
>
> > Now my first question is, how do I reference my current Java code in
> > this GWT program. i.e if i have the following
>
> > com.pkg1.Class1;
> > com.pkg1.pkg2.Class2;
>
> > in my existing Java code,
>
> > and in my GWT java class I import these 2 classes for implementation,
> > what are the exact steps I need to follow so that these are correctly
> > added to the GWT program and can compile. So

Re: Newbie question - adding GWT to my existing application

[Surendra Viswanadham]

Hi Walden,

Here's what I did:

1) My current project is set up with the source code as

*project
  - webroot (all JSP, WEB-INF, etc lie here)
  - src
 - package
  - subpackage
   - Class1
  -  Class2
   - subpackage2
- Class3*

So now when adding GWT here's what i did:

1) I ran the applicationCreator command under the project directory, so if
the name of my GWT module is going to be gwt_test

*project
  - webroot
  - src
  - gwt_test
*
So in order to import Class1, i created a subpackage.gwt.xml  under the
subpackage directory
* - subpackage
- subpackage.gwt.xml
- Class1
- Class2*

The contents of this were

*
  
*

Now in my GWT module

gwt_test
  - src
  - package1
- subpackage
 - gwt
   - client
 - Gwt_test.java

I added the import statement to the Gwt_test.java  as a regular import  -
"import package.subpackage.Class1"
I modified the class path of gwt_test-compile.cmd to contain the additional
path to the  subpackage.gwt.xml i.e  *C:/./subpackage.gwt.xml *

Upon trying to GWT compile this, i still get the error

Removing units with errors
   [ERROR] Errors in
'file:/C:/eclipse_workspace/project/gwt_test/src/package1/subpackage.gwt.client.Gwt_test.java'
  [ERROR] Line 12: The import package.subpackage.Class1 cannot be
resolved
Compiling module package1.subpackage.gwt.client.Gwt_test
Computing all possible rebind results for
'package1.subpackage.gwt.client.Gwt_test'
   Rebinding package1.subpackage.gwt.client.Gwt_test.java
  Checking rule 
 [ERROR] Unable to find type 'gov.nsf.oirm.pims.gwt.client.TestUI'
[ERROR] Hint: Previous compiler errors may have made this type
unavailable
[ERROR] Hint: Check the inheritance chain from your module; it
may not be inheriting a r
equired module or a module may not be adding its source path entries
properly
[ERROR] Build failed


Actual class names have been substituted for privacy. Let me know what I'm
doing wrong.
Also additionally, I'd still like to know how to deal with this if I had to
be importing from a jar. I ask, because ideally I do not want to be
disturbing the current code structure too much and for curiosity I'd like to
know the limitation of GWT with this regard. When I do import from a jar,
does the jar being used need to have the source files as well as the class
files for the project. So for example if I was trying to use some 3rd party
or open source jar, then how would this work because most of the time we'd
be downloading and using binaries right.

Thanks
Suri
On Mon, Sep 29, 2008 at 8:47 AM, walden <[EMAIL PROTECTED]> wrote:

>
> Suri,
>
> If the current Java code is in the same project where you are adding
> GWT on the client, you don't need a jar.
>
> Your current Java code does have to be sanitized to meet the 'closed
> world' requirements of the GWT compiler.  Read the documentation on
> the GWT compiler and JRE emulation classes for details.
>
> Your current Java code will have to be findable by the GWT compiler,
> which means there must be a .gwt.xml file on the classpath when you
> run the GWT compiler (you'll need to create that), and it needs to
> indicate where the compile sources are.  There are basically two ways
> to approach this part:
>
> 1. keep your sources exactly where they are; place your Pkg1.gwt.xml
> file in the root folder of the smallest containing sub-tree for all
> the classes you need to include, and use the  tag as
> many times as necessary to indicate (and hopefully isolate) just the
> classes you want compiled by GWT.
>
> 2. do a little folder reorganization so that the classes you will
> share between server and client side are isolated cleanly; have a
> 'client' folder at the root of that sub-tree, and place your
> Pkg1.gwt.xml file as a direct sibling to the client folder.  Then you
> don't need  tags.
>
> Try that, report any errors you get, and we'll sort it out from there.
>
> Walden
>
> On Sep 27, 3:30 pm, Suri <[EMAIL PROTECTED]> wrote:
> > Hi All,
> > I'm a GWT newbie and I've just come fresh after reading up the basics
> > from the Google GWT tutorial. Here's my situation:
> >
> > I have an existing Java based web application (Struts based). Now I'm
> > trying to add a new module to it and figure I'd try to incorporate GWT
> > - mostly because I expect the new module to be a few very dynamic
> > pages communicating with the server often.
> >
> > Now my first question is, how do I reference my current Java code in
> > this GWT program. i.e if i have the following
> >
> > com.pkg1.Class1;
> > com.pkg1.pkg2.Class2;
> >
> > in my existing Java code,
> >
> > and in my GWT java class I import these 2 classes for implementation,
> > what are the exact steps I need to follow so that these are correctly
> > added to the GWT program and can compile. So far, I haven't seemed to

Re: Newbie question - adding GWT to my existing application

[Lothar Kimmeringer]

Hi Surendra,

Surendra Viswanadham schrieb:

> Thanks for that. I'm going to give this a try and let you know what I
> have. To clarify though, whenever we use the  tag in the
> pkg1.gwt.xml, is there not a way to have this defined for a whole
> package as opposed to each singular class?

Sure you can:



specifies that the package $basePackage.data should be considered as
client-package as well.
So if your GWT.xml-file resides in com.example.mygwtproject,
the package com.example.mygwtproject.data is regarded to
contain client-classes as well.

I haven't tried it with "absolute" package-names, so I'm not sure
if you can specify org.example.someotherpackage as source-package.


Regards, Lothar

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You received this message because you are subscribed to the Google Groups 
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Re: Newbie question - adding GWT to my existing application

[Surendra Viswanadham]

Hi Walden,Thanks for that. I'm going to give this a try and let you know
what I have. To clarify though, whenever we use the  tag in the
pkg1.gwt.xml, is there not a way to have this defined for a whole package as
opposed to each singular class? I would think that many large projects would
find this an annoyance if it had to be done for each class right? Or are
there are considerations I am not thinking about?

Suri

On Mon, Sep 29, 2008 at 8:47 AM, walden <[EMAIL PROTECTED]> wrote:

>
> Suri,
>
> If the current Java code is in the same project where you are adding
> GWT on the client, you don't need a jar.
>
> Your current Java code does have to be sanitized to meet the 'closed
> world' requirements of the GWT compiler.  Read the documentation on
> the GWT compiler and JRE emulation classes for details.
>
> Your current Java code will have to be findable by the GWT compiler,
> which means there must be a .gwt.xml file on the classpath when you
> run the GWT compiler (you'll need to create that), and it needs to
> indicate where the compile sources are.  There are basically two ways
> to approach this part:
>
> 1. keep your sources exactly where they are; place your Pkg1.gwt.xml
> file in the root folder of the smallest containing sub-tree for all
> the classes you need to include, and use the  tag as
> many times as necessary to indicate (and hopefully isolate) just the
> classes you want compiled by GWT.
>
> 2. do a little folder reorganization so that the classes you will
> share between server and client side are isolated cleanly; have a
> 'client' folder at the root of that sub-tree, and place your
> Pkg1.gwt.xml file as a direct sibling to the client folder.  Then you
> don't need  tags.
>
> Try that, report any errors you get, and we'll sort it out from there.
>
> Walden
>
> On Sep 27, 3:30 pm, Suri <[EMAIL PROTECTED]> wrote:
> > Hi All,
> > I'm a GWT newbie and I've just come fresh after reading up the basics
> > from the Google GWT tutorial. Here's my situation:
> >
> > I have an existing Java based web application (Struts based). Now I'm
> > trying to add a new module to it and figure I'd try to incorporate GWT
> > - mostly because I expect the new module to be a few very dynamic
> > pages communicating with the server often.
> >
> > Now my first question is, how do I reference my current Java code in
> > this GWT program. i.e if i have the following
> >
> > com.pkg1.Class1;
> > com.pkg1.pkg2.Class2;
> >
> > in my existing Java code,
> >
> > and in my GWT java class I import these 2 classes for implementation,
> > what are the exact steps I need to follow so that these are correctly
> > added to the GWT program and can compile. So far, I haven't seemed to
> > have found a definitive answer to this problem. I saw a few solutions
> > of people saying a jar needs to be included and it needs to have a
> > .gwt.xml file which gets inherited or something but didn't quite
> > understand what exactly they meant.Some others spoke about source code
> > having to be available for the program to compile in order to convert
> > the javascript. The reading ended up leaving me in a half baked
> > situation which still doesn't help my GWT program compile.
> >
> > I'd really appreciate some help and maybe a few fundamentals on what
> > needs to be happening.
> >
> > Thanks
> > Suri
> >
>

--~--~-~--~~~---~--~~
You received this message because you are subscribed to the Google Groups 
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Re: Newbie question - adding GWT to my existing application

[walden]

Suri,

If the current Java code is in the same project where you are adding
GWT on the client, you don't need a jar.

Your current Java code does have to be sanitized to meet the 'closed
world' requirements of the GWT compiler.  Read the documentation on
the GWT compiler and JRE emulation classes for details.

Your current Java code will have to be findable by the GWT compiler,
which means there must be a .gwt.xml file on the classpath when you
run the GWT compiler (you'll need to create that), and it needs to
indicate where the compile sources are.  There are basically two ways
to approach this part:

1. keep your sources exactly where they are; place your Pkg1.gwt.xml
file in the root folder of the smallest containing sub-tree for all
the classes you need to include, and use the  tag as
many times as necessary to indicate (and hopefully isolate) just the
classes you want compiled by GWT.

2. do a little folder reorganization so that the classes you will
share between server and client side are isolated cleanly; have a
'client' folder at the root of that sub-tree, and place your
Pkg1.gwt.xml file as a direct sibling to the client folder.  Then you
don't need  tags.

Try that, report any errors you get, and we'll sort it out from there.

Walden

On Sep 27, 3:30 pm, Suri <[EMAIL PROTECTED]> wrote:
> Hi All,
> I'm a GWT newbie and I've just come fresh after reading up the basics
> from the Google GWT tutorial. Here's my situation:
>
> I have an existing Java based web application (Struts based). Now I'm
> trying to add a new module to it and figure I'd try to incorporate GWT
> - mostly because I expect the new module to be a few very dynamic
> pages communicating with the server often.
>
> Now my first question is, how do I reference my current Java code in
> this GWT program. i.e if i have the following
>
> com.pkg1.Class1;
> com.pkg1.pkg2.Class2;
>
> in my existing Java code,
>
> and in my GWT java class I import these 2 classes for implementation,
> what are the exact steps I need to follow so that these are correctly
> added to the GWT program and can compile. So far, I haven't seemed to
> have found a definitive answer to this problem. I saw a few solutions
> of people saying a jar needs to be included and it needs to have a
> .gwt.xml file which gets inherited or something but didn't quite
> understand what exactly they meant.Some others spoke about source code
> having to be available for the program to compile in order to convert
> the javascript. The reading ended up leaving me in a half baked
> situation which still doesn't help my GWT program compile.
>
> I'd really appreciate some help and maybe a few fundamentals on what
> needs to be happening.
>
> Thanks
> Suri
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You received this message because you are subscribed to the Google Groups 
"Google Web Toolkit" group.
To post to this group, send email to Google-Web-Toolkit@googlegroups.com
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