Paging in java application
Greetings to All, I found this documentation http://code.google.com/appengine/articles/paging.html on paging in python. Can some one suggest the best way to implement pagin in a java application deployed in GAE and data store in GAE data store. I want to show say 10 images in every page out of around 1000 (available in DB). Also please let me know any widgets available to implement pagination. -Sanjith --~--~-~--~~~---~--~~ 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 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 -~--~~~~--~~--~--~---
Re: how to use a server class in client code
@Dalla: Thanks again for those steps. As i am not familiar with those tools
am finding a bit difficult to handle it.
@Dominik: Thanks a lot for that information. It will save a lot of life for
me. So is it enough to move my current class definitions from the server to
the client/domain package and use them at both server and client code?
-Sanjith
On Tue, Nov 10, 2009 at 11:12 PM, Dominik Steiner <
dominik.j.stei...@googlemail.com> wrote:
>
> Sanjith,
>
> I'm using GWT on GAE and I also have my data model classes with JDO
> annotations. I have those classes reside under client/domain and GWT
> 2.0 handles/ignores those JDO related annotations well and i don't
> have to use Dozer or another framework in order to be able to use
> those classes on the client.
>
> If you need more help, please let me know.
>
> HTH
>
> Dominik
>
> On Nov 9, 12:40 pm, Dalla wrote:
> > I´m not sure you can solve this particular problem the way DaveS
> > suggested, not without modifying the class anyway.
> > Even if you created a separate .jar and referenced that from your
> > client project, the GWT compiler wouldn´t understand the annotations.
> >
> > My problem was similar to yours, and would be solved by creating a new
> > even simpler class like this:
> >
> > Public class PhotoSetStoreDTO {
> >
> > private String setid;
> > private String title;
> > private String description;
> >
> > private String primaryPhotoURL;
> > public PhotoSetStore(String id, String title, String descString,
> > String photoURL) {
> > setSetID(id);
> > setTitle(title);
> > setDescrption(descString);
> > setPrimaryPhotoURL(photoURL);
> >
> > }
> > }
> >
> > Then use Dozer or a similar mapping framework to do the mapping
> > between server side and client side objects.
> > I haven´t been working with GAE at all to be honest, so there might be
> > a better approach.
> >
> > On 9 Nov, 18:39, Sanjith Chungath wrote:
> >
> > > Thanks to all for your suggestions.
> >
> > > As my application needs to be deployed in google app engine, I doubt
> whether
> > > I can move those classes from server to client. I use JDO to persist
> objects
> > > to the GAE data store. The class is a simple class and I have mentioned
> it
> > > below,
> >
> > > @PersistenceCapable(identityType = IdentityType.DATASTORE)
> > > public class PhotoSetStore {
> > > @PrimaryKey
> > > @Persistent
> > > private String setid;
> >
> > > @Persistent
> > > private String title;
> >
> > > @Persistent
> > > private String description;
> >
> > > @Persistent
> > > private String primaryPhotoURL;
> >
> > > public PhotoSetStore(String id, String title, String descString,
> > > String photoURL) {
> > > setSetID(id);
> > > setTitle(title);
> > > setDescrption(descString);
> > > setPrimaryPhotoURL(photoURL);
> >
> > > }
> > > }
> >
> > > Dave, it looks simple approach to have a (java) project to have common
> > > classes defined. I need few clarifications, do you have seperate
> projects
> > > for GWT client code and server code? If not, how did you added the
> common
> > > .jar file to the client code?
> >
> > > Also, I didnt quiet get how the common .jar file is different from the
> class
> > > existing in a server package of same GWt project!
> >
> > > -Sanjith
> >
> > > On Mon, Nov 9, 2009 at 5:10 PM, sathya wrote:
> >
> > > > Hi,
> > > >You can serialize classes only defined in client side(not server
> > > > side).Class you defined on server side should be moved to client side
> > > > to serialize.
> >
> > > > On Nov 9, 4:01 pm, DaveS wrote:
> > > > > That's how we did it originally, but then we created a separate GWT
> > > > > project (well, actually it's just a JAR project) that defines all
> our
> > > > > types that are common over the RPC interfaces. We reference that
> > > > > project in both the server and client projects, and the JAR gets
> > > > > pulled into the client side and GWT happily generates JS code from
> it.
> > > > > We now also use it for some 'shared' client-side classes as well so
> > > > > it's effectively just a library project.
> >
> > > > > DaveS.
> >
> > > > > On Nov 9, 3:35 am, rjcarr
Re: how to use a server class in client code
Thanks to all for your suggestions.
As my application needs to be deployed in google app engine, I doubt whether
I can move those classes from server to client. I use JDO to persist objects
to the GAE data store. The class is a simple class and I have mentioned it
below,
@PersistenceCapable(identityType = IdentityType.DATASTORE)
public class PhotoSetStore {
@PrimaryKey
@Persistent
private String setid;
@Persistent
private String title;
@Persistent
private String description;
@Persistent
private String primaryPhotoURL;
public PhotoSetStore(String id, String title, String descString,
String photoURL) {
setSetID(id);
setTitle(title);
setDescrption(descString);
setPrimaryPhotoURL(photoURL);
}
}
Dave, it looks simple approach to have a (java) project to have common
classes defined. I need few clarifications, do you have seperate projects
for GWT client code and server code? If not, how did you added the common
.jar file to the client code?
Also, I didnt quiet get how the common .jar file is different from the class
existing in a server package of same GWt project!
-Sanjith
On Mon, Nov 9, 2009 at 5:10 PM, sathya wrote:
>
> Hi,
>You can serialize classes only defined in client side(not server
> side).Class you defined on server side should be moved to client side
> to serialize.
>
>
> On Nov 9, 4:01 pm, DaveS wrote:
> > That's how we did it originally, but then we created a separate GWT
> > project (well, actually it's just a JAR project) that defines all our
> > types that are common over the RPC interfaces. We reference that
> > project in both the server and client projects, and the JAR gets
> > pulled into the client side and GWT happily generates JS code from it.
> > We now also use it for some 'shared' client-side classes as well so
> > it's effectively just a library project.
> >
> > DaveS.
> >
> > On Nov 9, 3:35 am, rjcarr wrote:
> >
> >
> >
> > > Hi Sanjith-
> >
> > > I don't completely follow your question but any shared code between
> > > the client and the server has to reside in the client package (by
> > > default). This is because GWT can only see code in the modules you
> > > have defined and the server package isn't a GWT module (again, by
> > > default).
> >
> > > Hope this helps!
> >
> > > On Nov 8, 10:30 am, Sanjith Chungath wrote:
> >
> > > > Greetings to all,
> > > >I have defined a class in the server and want to get a list of
> > > > objects (of that class) as return parameter of an async call. But
> while
> > > > compile I got following error "No source code is available for type
> > > > com.abc.pqr.data.XXX; did you forget to inherit a required module?".
> I know
> > > > that it is because GWT dont know the java script code for
> coresponding
> > > > class. What is the general practice to use a object of class in
> server side
> > > > at client code, serialize it? or any other better way.
> >
> > > > -Sanjith.- Hide quoted text -
> >
> > - Show quoted text -
> >
>
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how to use a server class in client code
Greetings to all, I have defined a class in the server and want to get a list of objects (of that class) as return parameter of an async call. But while compile I got following error "No source code is available for type com.abc.pqr.data.XXX; did you forget to inherit a required module?". I know that it is because GWT dont know the java script code for coresponding class. What is the general practice to use a object of class in server side at client code, serialize it? or any other better way. -Sanjith. --~--~-~--~~~---~--~~ 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 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 -~--~~~~--~~--~--~---
Re: How can I set an alternative URL?
ah got it just now. it's very very easy in eclipse. As i added new entry
point from eclipse project setting, it created a folder with the new entry
point in the *war *folder. I just need to refer the .js file inside that
folder in a new .html file.
-Sanjith.
On Sun, Nov 8, 2009 at 12:51 AM, Sanjith Chungath wrote:
> Thanks a lot Bob for sharing the solution. I was trying to do exactly what
> you referred below. For me the default entry point is for normal user and I
> want a new one for admin user.
>
> I already did steps 1 and 2, also i think steps 4 and 5 will be
> automatically taken care as I added new entry point in the eclipse project
> setting dialog.
>
> I want to know what you wrote in "com.myApp.db_maint.nocache.js" that
> you referred in step 3.
>
> Are there any documentation on how to define and use new entry points?
>
> -Sanjith.
>
> On Thu, Sep 24, 2009 at 8:40 PM, BobM wrote:
>
>>
>> I have solved my problem. The solution may be helpful to others with
>> similar requirements.
>>
>> my solution:
>>
>> 1. Create a new and additional module, db_maint.gwt.xml:
>>
>>
>>
>>
>>
>>
>>
>>
>> 2. Create a new EntryPoint class, DB_MaintEntryPoint.java:
>> /* DB_MaintEntryPoint.java
>> *
>> */
>> package com.myApp.client;
>> import com.google.gwt.core.client.EntryPoint;
>> import com.myApp.client.gui.MainFrame;
>> public class DB_MaintEntryPoint implements EntryPoint {
>>/** Creates a new instance of MainEntryPoint */
>>public DB_MaintEntryPoint() {
>>}
>>/**
>>The entry point method, called automatically by loading a
>> module
>>that declares an implementing class as an entry-point
>>*/
>>public void onModuleLoad() {
>>new MainFrame();
>>}
>> } // End of DB_MaintEntryPoint
>>
>> 3. Create a new html to load the new module, db_maint.html:
>> > www.w3.org/TR/html40/Strict.dtd">
>>
>>
>>MyApp Database maintenance
>>
>>
>>> src="com.myApp.db_maint.nocache.js">
>>
>>
>>
>> 4. My development environment is driven by ant, so I had to modify my
>> build.xml to include my new module in the compile process, both for
>> that process which does the GWT compile for deployment and,
>> separately, for the process that drives the hosted mode:
>>
>> In my build.xml, GWTcompile target:
>>
>>> fork="true"
>> maxmemory="256m" >
>>
>>
>>
>>
>>
>>
>> Then into the GWTshell target:
>>
>>
>>> fork="true"
>> spawn="true"
>> maxmemory="256m" >
>>
>>
>>
>>
>>
>>
>> The GWT shell is starting database maintenance.
>>
>>
>>
>> Having accomplished these steps and then compiled and deploy to tomcat
>> I can run my main application by
>> http://localhost:8080/myApp
>> and my subApp by
>> http://localhost:8080/db_maint.html
>>
>> Works for me! I hope this may to useful to others. Enjoy!
>> >>
>>
>
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Re: How can I set an alternative URL?
Thanks a lot Bob for sharing the solution. I was trying to do exactly what
you referred below. For me the default entry point is for normal user and I
want a new one for admin user.
I already did steps 1 and 2, also i think steps 4 and 5 will be
automatically taken care as I added new entry point in the eclipse project
setting dialog.
I want to know what you wrote in "com.myApp.db_maint.nocache.js" that
you referred in step 3.
Are there any documentation on how to define and use new entry points?
-Sanjith.
On Thu, Sep 24, 2009 at 8:40 PM, BobM wrote:
>
> I have solved my problem. The solution may be helpful to others with
> similar requirements.
>
> my solution:
>
> 1. Create a new and additional module, db_maint.gwt.xml:
>
>
>
>
>
>
>
>
> 2. Create a new EntryPoint class, DB_MaintEntryPoint.java:
> /* DB_MaintEntryPoint.java
> *
> */
> package com.myApp.client;
> import com.google.gwt.core.client.EntryPoint;
> import com.myApp.client.gui.MainFrame;
> public class DB_MaintEntryPoint implements EntryPoint {
>/** Creates a new instance of MainEntryPoint */
>public DB_MaintEntryPoint() {
>}
>/**
>The entry point method, called automatically by loading a
> module
>that declares an implementing class as an entry-point
>*/
>public void onModuleLoad() {
>new MainFrame();
>}
> } // End of DB_MaintEntryPoint
>
> 3. Create a new html to load the new module, db_maint.html:
> www.w3.org/TR/html40/Strict.dtd">
>
>
>MyApp Database maintenance
>
>
> src="com.myApp.db_maint.nocache.js">
>
>
>
> 4. My development environment is driven by ant, so I had to modify my
> build.xml to include my new module in the compile process, both for
> that process which does the GWT compile for deployment and,
> separately, for the process that drives the hosted mode:
>
> In my build.xml, GWTcompile target:
>
> fork="true"
> maxmemory="256m" >
>
>
>
>
>
>
> Then into the GWTshell target:
>
>
> fork="true"
> spawn="true"
> maxmemory="256m" >
>
>
>
>
>
>
> The GWT shell is starting database maintenance.
>
>
>
> Having accomplished these steps and then compiled and deploy to tomcat
> I can run my main application by
> http://localhost:8080/myApp
> and my subApp by
> http://localhost:8080/db_maint.html
>
> Works for me! I hope this may to useful to others. Enjoy!
> >
>
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Re: how can we append Text to a TextArea widget
Adam,Ah thats too simple. i will try that. Lothar, tnx for all hints. I will chk for log-monitor also. one more query, how can i find the number of lines of available text in a TextArea? -Sanjith. On Thu, Jan 8, 2009 at 1:15 PM, Lothar Kimmeringer wrote: > > Sanjith Chungath schrieb: > > > I want to write an async method to retrieve some String from the > > server. onSuccess I want to append the reruned string to a TextArea. is > > it possible. i can see only setText() method for this class.basically I > > want to monitor the stdout/stderr of a server process and update it on > > the client using async method (with a timer). My use will be in intranet > > not in internet. > > Adam was answering that already but one more point. I was having the > same necessity and was ending with a VerticalPanel (inside a Scrollpanel) > where I added HTML-instances for every new entry being added. That gave > me the ability to e.g. deactivate scrolling allowing the reading of the > content (if you do a setText, the browser will jump to the beginning > of the text again) and you can delete old entries from the beginning > of the list to avoid that the browser will run out of memory if the > (let's call it) logmonitor is running for a longer period of time. > > If you look for log-monitor there even might be a ready to use widget > somewhere waiting to be downloaded. > > > Regards, Lothar > > > > --~--~-~--~~~---~--~~ 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 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 -~--~~~~--~~--~--~---
how can we append Text to a TextArea widget
Hi, I want to write an async method to retrieve some String from the server. onSuccess I want to append the reruned string to a TextArea. is it possible. i can see only setText() method for this class.basically I want to monitor the stdout/stderr of a server process and update it on the client using async method (with a timer). My use will be in intranet not in internet. --~--~-~--~~~---~--~~ 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 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 -~--~~~~--~~--~--~---
