Hello Everyone,
I have broken my Client side part of my GWT app, into several gwt modules,
- a common module configuring EventBus,PlaceController,ActivityMapper, +
EntryPoint)
- several modules each corresponding to a Functional Area (Reports, Tasks,
etc),
these don't have any EntryPoint,
Thank You.
I am trying to breaking my app into: client, server, and shared modules.
in the shared module, I would like to put
RequestContext, and Entity/Value Proxy interfaces,
as well as server side Interfaces corresponding to RequestContext,
for example, this shared module:
EmployeeProxy -
Thank You so much for your suggestions,
also with the help from gwt-maven-plugin group,
I could somehow get it working.
I have questions regarding using mvn jetty, and mvn gwt:run
in short,
when having multi-module maven gwt projects,
1- from which directory you run mvn jetty ? (root or the
just to add to my post that the problem I am facing is that
since my client sub-projects contain only Java source files +
module.gwt.xml,
they don't have any main .html file to use as gwt-maven-plugin runTarget.
and from my setup, it is the assembly sub-project, which gathers all the
sources,
It is often recommended that, it is a good practice, for components,
such as client/server communicate through interface.
when working with RequestFactory,
we need to define RequestContext, which makes use of Entity/Value Proxies.
these are all interfaces.
however, Server side code, cannot
Hello Everyone,
summary:
can GWT Compiler take a JAR file containing Java* .class* files and compiles
it to JavaScript ?
(given I have followed GWT JRE Whitelist, and have not used anything that is
not emulated)
background:
Let's say I have written code using GWT, and then I use *javac* to
do you know if there is a command-line GWT Compiler ?
something like: gwtc MyGWTClass.java ?
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Hello Everyone,
do you know what is the purpose of the files
*hosted.html* and
*clear.cache.gift* ?
should they be included in final deployment ?
I believe clear.cache.gift must be included, but not hosted.html,
what do you think ?
Thank You
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Thank You,
following Thomas suggestions, my gwt-client maven module, has packaging of
type JAR.
I use gwt-maven-plugin to compile my Java Sources, and create resulting
artifacts [1]
I then use maven-assembly-plugin to ZIP these generated artifacts in a ZIP
archive,
so that I can use it as a
Hello,
in GWT, we write code in Java, that GWT Compiler , compiles to JavaScript.
- when deploying the application, do you think we need compiled Java class
files in our final WAR ?
or we just need the generated .js ?
I look inside the war file generated, and I see my client-side Java classes
we do the gwt:compile in the client module (which is with
packaging=jar
- do you know how gwt:compile can produce a JAR ? is it possible ?
- GWTCompiler job is to compile Java to JavaScript,
can JavaScript in a JAR be accessible from application's .html page ?
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Hello,
is it possible to use Java 7 in GWT ?
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you mentioned using maven-assembly-plugin, to be used as a war overlay.
what do you think of maven-dependency-plugin [1] in this situation ?
given we have
app
client
shared
server
webapp
* what I'm thinking is:
we gwt:compile the client, and copy the generated files into
ok, I am on to something,
I have a very fundamental question though.
as you mentioned, we GWT Compile our client files,
(the result of this cimpilation is bunch of md5.html files (could have css,
image, 3rd party js), correct ?)
then we need to TAKE these generated files and PUT it in our
could you please explain, why the check on client-side is necessary, if the
server does the check ?
and on the client-side, do you mean having a UserRoles object, which
contains user's permission ?
Thank You
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I believe Map is not supported, only Set and List.
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if using GWT Activities, do you think it is better to perform the check in
Activities themselves or in ActivityMappers (or ActivityFactories) ?
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I am also interested in finding a decent solution for this.
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Hello Everyone,
I would like to ask your opinion on the correct way of organizing large gwt
projects.
Below you can see the approach I'm thinking of, I am not sure though,
and greatly appreciate your invaluable input, or experience in similar
situation.
GWT documentation recommends a project
Thank you so much for your always invaluable feedback.
I am investigating your suggestions at the moment.
following your comment:
splitting client/shared/server into 3 distinct modules, with a 4th one to
pull client and server together into a webapp (client and server both
depending on
do I need gwt-servlet and gwt-user library, in my pom.xml ?
I was uploading my gwt app on app engine, I got the error
saying gwt-user jar is too big, and I need to split it.
I decided to comment out gwt-user, and I didn't get any error or warning,
which made me wonder what dependencies I need to
Hello,
I am getting this line in my log files,
but don't know what , if any, is wrong ?
FINE: Got /gwtRequest with null response, returning null.
also
FINE: Got /App/remote_logging with null response, returning null.
RequestFactory returns the result, and everything appears to be working
I don't think you can use Log4J with GWT. only java.util.Logging
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is it possible to use an SL4J adapter in GWT to wrap java.util.logging ?
I would like to be able to use logging.properties file to define formatting,
which I believe is not possible with java.util.logging.
Thank You
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do you have any experience with Amazon WebService Datastore services,
such az AWS SimpleDB ? http://aws.amazon.com/running_databases/#simpledb
What is the benefit of using GAE Datastore instead of AWS SimpleDB ?
What is the benefit of using non-relational Datastore ?
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I am having the similar problem,
I am also getting *IncompatibleClassChangeError* after upgrading to 2.2-rc1
from 2.1
I also posted on the issue page.[1]
You can find the detail of my exception here:
http://pastebin.com/HwVc7Zu3
I am not doing any kind of code generation whatsoever.
just using
Hello Everyone,
What do you think of JBOSS GWT Framework Errai ?
http://www.jboss.org/errai
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Hello Everyone,
I am getting SaxParseException when using a custom created SafeHtml
Template,
it complains that the markup is malformed, but I cannot spot the problem.
do you know what I am doing wrong ?
Thank You
I have the following template:
final Template template =
Thank you Ryan, it Worked !!!
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does it work with copy-and-paste scenarios ?
when a user pastes a long text, will the text-area auto-grow ?
paste using ctrl+v or mouse-right-click-context-menu
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Luca, could you please clarify what Locator are you talking about ?
EntityLocator or ServiceLocator ?
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dagerber, Luca,
could you please clarify which Locator are you referring to ?
EntityLocator or ServiceLocator ?
Thank You
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+ Basic Button style is excellent, very professional looking
+ Date Picker is great
+ TabLayoutPanel is great, unlike a comment above, I believe it is
professional looking too.
- TextBox style is very poor : (
would have been nice to have a border, light background
It seems to have no style
I know its a matter of taste, but I very much love the shades of blue
themes,
I LOVE really LOVE TabLayoutPanel.
Professional does not mean looking boring grey,
for the Button, the Grey style is fantastic, but for the rest,
please do not overuse grey.
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when dealing with CellWidgets that gets their data through RequestFactory
two of the steps are:
1- one requestFactory call to get the count // this is done once
2- requestFactory calls to get the data for new range,
as RangeChangeEvent fires.
these two steps are necessary to set CellWidget's
forgot to add,
where in code is the correct place to put the code to update the view ?
getView().asHasData().setRowData should be placed in onRangeChanged or
outside of it ?
Thank You
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one of my concern is as RangeChangeEvent fires, and AsyncDataProvider
fetches data for new range,
the CellWidget flashes, in other words from the time I click Pager, to the
time data get fetched for new page(range),
the CellWidget (list/table) becomes blank, with no data. (I am displaying
Hello Everyone,
is it possible to add animation to CellWidgets as RangeChangeEvent fires ?
for example lets say our CellTable/CellList has a Pager.
what can be done so that as user clicks forward/backward on Pager,
the CellWidget have some sort of animation, the impression of its going
right or
traditionally when unit/integration testing data access in application
(CRUD),
a test would be:
@Test
public void testInsertSucceeds(){
// 1- insert this record to DB
//2- find the inserted record, to check its actually inserted
//3- delete the inserted record, to keep the DB in clean state and
Thank You,
I agree with the delete part of it.
Thank you for pointing that out.
so with delete now out of the picture,
lets consider the first two steps when testing whether inserting a
record succeeds
1- inserting a record
2- verifying it is inserted
this would require two calls on
1- do you know how I can configure the format of the log message displayed?
every time my log messages are printed on the console,
GWT adds a line above it describing the long time/date format and the long
class name.
as a result each log message is shown at two lines, and hard to follow.
sorry for being vague,
those two steps I described above,
are actually within the same test
@Test
public void testInsertSucceeds(){
// 1- insert this record to DB
//2- find the inserted record, to check its actually inserted
}
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Thank You for pointing out that
InProcessRequestTransport is in fact synchronous.
your other suggestion on how to make it work with GWTTestCase
do you mean something like below ?
having a second request placed within the first request ?
this guarantees synchronicity ?
Thank You
Thank You very much,
it was very helpful.
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Hello Everyone,
my GWT App uses RequestFactory to access Data.
for actual data storage I would like to ask your opinion,
in your experience what is the benefit of using GAE Datastore over
AmazonSimpleDB ?
Thank You
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I have come across RequestFactoryInterfaceValidator class , which has many
methods useful for validating RequestContext and EntityProxies.
However I am not sure whether there is any value to use this Validation as
part of the unit testing of our RequestFactory communication ?
my idea is that
this is what I am talking about ..., is there any value in creating tests
like this ?
@Test
public void testRequestContextIsValid() {
RequestFactoryInterfaceValidator v = new
RequestFactoryInterfaceValidator(
logger, new RequestFactoryInterfaceValidator.
What is the correct way to send images from server to the client ?
this is my image proxy:
public interface ImageProxy extends ValueProxy {
String getName();
ListByte getImage();
}
I use ListByte, because byte[] is not accepted by RequestFactory.
I use Guava Bytes.toArray and
don't you think this can be achieved by using selectionModel.setSelection
and selecting the first item from the current range ?
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Do ValueProxies require EntityLocator ?
EntityProxies require EntityLocator, but what about ValueProxies ?
Thank You
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Hello Everyone,
I modified GWT basic CellList sample, to experiment how I can style a
CellList.
Unfortunately I am getting exceptions, and was not successful in styling a
cell list.
Below you can find my basic code sample which I posted on pastebin for easy
viewing.
Do you know what I am
The line highlighted as the source of problem is :
CellList.Resources resources = GWT.create(MyCellResources.class);
and the exception can be found here:
http://pastebin.com/eLLBAMLj
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Ok, I found what I was doing wrong : )
I should have overriden all styles defined in CellList.
I had left out,
.cellListWidget {} and corresponding String cellListWidget();
.cellListSelectedItem {} / String cellListSelectedItem();
I added those, and it worked.
though not very critical, I am
Hello Everyone,
Let me start with a concrete example: Thumbnail Grid view !
we have custom cells (images + text), layed out in X column and Y rows.
with CellTable, when we are Displaying List of Items for example Contacts,
each Row represents a Contact, and each Column represents a Property of
could you please clarify what do you mean by stateful view ?
Pages through: stays on #List?id=aaa but *this view is stateful *
(keeps information on the current page)
Hits back: goes back to #List?id=aaa on the last page viewed
(*because it's stateful*)
and another question,
why do you not
Hello Everyone,
I have read that inorder to facilitate integration with automated testing
tools
such as selenium which rely on DOM element id, it is a good practice to
use ensureDebugId,
as this can be compiled out for production release, and result in zero
overhead.
However I need to use
I am very confused about HasCellT,C and ColumnT,C.
I am using Cell types available by GWT (TextCell, ActionCell etc), and I can
get them to work.
However, when I try to create custom Cell for CellTable,
I realize I do not fully understand what I'm doing,
and the confusion is from not fully
I am using the same technique as Ryan suggested.
Your comment : non-singleton class that return always the same instance
isn't a non-singleton class that always return the same instance in fact
the very definition of Singleton ? : )
I have read that there is a difference between Singleton
I am not sure if this helps,
but there is a feature called Binding Annotations,
you can use BindingAnnotation to differentiate the Provider used in Class A,
from the one used in Class B.
http://code.google.com/p/google-guice/wiki/BindingAnnotations
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Thank You for very clear explanation,
I understand it now : )
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Hello Everyone,
Could you please provide some tips on how to implement Collapsible Rows in
CellTable ?
for example, clicking on a Row, result in Row to be expanded, and display
some custom widget in it.
so far, I was able to put a custom widget (label, button, text box) within
the cell,
this
I have a CellTable.
when an event occurs in Cell A,
I would like to take action and modify Cell B.
(user clicks on Cell A, I would like to modify Cell B, in the same row to
keep things simple)
could you please provide some pointers on how this can be correctly
implemented ?
do you think we
GWT has Element and Node class which are wrappers for low level DOM
elements/nodes.
do you know How I can convert SafeHtml to Element or Node ?
for example using the code below, I create a SafeHtml.
SafeHtml html =
SafeHtmlUtils.fromSafeConstant(trtdXXX/tdtdYYY/td/tr);
but I could not find a
Thank You.
However I found what Prashant suggested to be easier to work with, than
SafeHtml Templates.
with current UiBinder, we can create custom widget as we would,
by extending Composite, having Java code which is UiBinder owner,
and corresponding UiBinder, just like a typical composite,
we
I have a CellTable,
when user clicks on row R,
I want to insert a new row right after row R, in position R+1.
however row R and row R+1 have different Cell types,
row R a TextCell displaying a text, and want to insert a panel (custom cell)
in row R+1.
is this possible ? can we insert a new row
Hello Everyone,
is there any release notes for GWT 2.2-M1 ?
I would like to know about the features added or modification to API.
Thank You
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I do not think this is a bug,
and in fact I found the current implementation very desirable.
your table always shows X number of rows per page, even if its the last
page.
with this implementation your table will always have the same height, and
same number of rows.
and you dont have to deal
I was thinking of using a Packet Analyzer like Wireshark, to monitor what is
being sent over the wire from client to server and back
when using GWT in development mode.
However I am getting all kinds of low level bits and have not been
successful in applying some kind of filters,
to display
after investigating CompositeCell or directly extending AbstractCell,
it is my understanding that to create custom cell,
the only option at the moment is to embed HTML markup in the render method
as below.
in other words, we cannot create a custom composite widget with UiBinder,
and add it to
Thank You.
Prashant, I am following your suggestion,
I am a bit unclear about this part of your comment: set the data and
getHTML
should my custom widget implement HasHTML ?
http://google-web-toolkit.googlecode.com/svn/javadoc/1.5/com/google/gwt/user/client/ui/HasHTML.html
could you please
THANK YOU!
it worked !!
what a wonderful solution !
one other question,
in your experience,
- do you think it is possible to change a cell once it's rendered ?
for example, implement onClick event, in a way that upon a click,
another widget is added to the currently displayed row.
I am trying to
Thank You,
I tried your suggestion.
In the onBrowseEvent, I capture the click event,
but just capturing event does not result in re-rendering the table.
I assume I need to somehow update the table for the re-rendering to happen,
but I don't know how
If your click event, updates the table in
I realized what I was doing wrong.
I was trying to do everything in the custom cell.
I decided to handle things at CelLTable level, instead of cell level.
so I defined a SingleSelectionModel, and when the row is selected,
I change the flag within this selectionModel, which is related to the
1- so all the effort that goes into creating a Bookmarkable and Navigable
Master/Detail Activity goes to waste ?
2- what is the point of using Activity/Places to create this Master/Detail
scenario, if it is not going to function properly ?
3- can you think of a User Experience that says it is ok
I am getting this exception more and more now.
I am not using a Date type,
but I manipulate the range the table is showing using
table.setVisibleRange.
My problem is that I don't understand what exactly is that I am doing wrong,
and how to change my code to avoid this exception.
in other words,
could you please explain what is the rationale behind using multiple entry
points ?
what is the benefit of using them ? and how it relates to code-splitting and
gin-modules ?
Thank You
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I would also like to know the answer to this.
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Thank You : )
your post gave me some comfort : )
Yes, the problem is related to paging, and not necessarily activity/places.
as for your opinion of master/detail,
I think it is a shame to not take advantage of the fact that we can
display master/detail side by side, without a full page reload,
I might be wrong,
but please do remember that the Java code you write,
are compiled to JavaScript, therefore in your statement:
I do not understand how is it possible to get the value of the
symbol variable after the button has been created and sent to
client.??
button is not sent to the
in my experience,
support has been fantastic.
if the question is complex that developers cannot answer,
google experts weigh in.
as for GWT being used for mission critical systems,
many of Google applications , are built using GWT. maybe others can name the
specific app.
I know of Google Wave
THANK YOU !!
You have been extremely helpful,
you are truly an asset for GWT community.
Thank You !
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it is a common practice to display a Loading message/icon
when we have an operation that possibly would take some time to complete.
for example when retrieving data from Datastore, etc.
I was wondering how we can do the same for Activities/Places.
in GWT MVP, when navigating from one place to
Thank You,
I understand the mechanics of hiding/showing,
what I am not clear is the timing of it,
when dealing with Activities and Places.
do we need to use onStop method of one activity
and start method of another, to signal when one is stopped/started
and use events for these two activities to
I found an inconsistent behaviour in GWT Expenses Roo application.
Actually I found it in my own sample app inspired by Expenses app,
and when I checked GWT Expenses Roo for reference,
I realized it is the case there also.
Problem Summary:
** When Hitting Browser Back Button, Master and Detail
can we use equals() to see if two EntityProxy or ValueProxy are equal ?
in other words, is equals() already overriden for our custom Entity/Value
proxies,
or we need to override it ourselves, or it does not make sense to compare
two proxies ?
Thank You
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I have a CellTable displaying a list of items.
this table has a SimplePager.
I have defined a SingleSelectionModel for this CellTable.
when I want to select an item, i use selectionModel.setSelected(item,
true);
this works fine.
however there is an inconsistent behaviour in the following
Can I create custom composite widgets ( panels containing label, button,
edit box),
and include these custom widgets within the CellWidgets (CellTable,
CellTree) ?
for example, when clicking on a node, instead of displaying just a text,
be able to display a composite widget,
or including
Hello Everyone,
does calling CellTable's setVisibleRange result in RangeChange Event being
fired ?
in my experiments, it appears so, I want to confirm this, and may I ask why
? : )
Thank You
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Hello Everyone,
I was going back and forth within my CellTable, I got this random Severe
exception which I couldn't reproduce.
other than this random exception my table seems to be stable and everything
seem to be fine.
the IDE highlights this line within my code:
table.addColumn(new
Hello Everyone,
Is it possible to set the CellTable height to 100% to fill the available
remaining space ?
when I set the width to 100%, it works for width,
but I tried setting the height to 100%, it didnt work.
do you have any suggestions ?
Thank You
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Hello Everyone,
do you have any suggestion on how we can handle situations where a user
repeatedly presses browser Refresh button during a server call ? (F5)
I am displaying data in a CellTable which uses RequestFactory to retrieve
data.
if I press F5, couple of times during call to the
I think what you suggested, will result in Synchronous/Blocking calls.
it won't be Parallel nor Asynchronous.
Why not just make one call to a service and call different methods within
your service object? You can put methods in your serviceImpl that are not
RPC methods.
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I have included the relevant code from Roo generated Expenses app here:
http://pastebin.com/2FUbaVjY
in onRangeChanged method,
getView().asHasData().setRowData(range.getStart(), values);
the code invokes setRowData on CellTable, and it makes use of onRangeChanged
event,
and in fact displays
Thank You.
I looked into ProxyStore and ProxySerializer.
I can see we can put individual entityproxies in ProxyStore, and later
retrieve it.
This is great.
- do you know if it is possible to put a List of proxies in the store, and
later retrieve the list as a whole,
instead of an individual
Hello Everyone,
do you know when we need to use AsyncDataProvider instead of
CellTable.setRowData ?
what is difference between the two, and when to use one over the other ?
I have looked at the documentation, and have experimented with both in code,
but still do not understand when and why I
If there are multiple displays, a* single data provider* can manage all
of them in one place.
do you mean a single* AsyncDataProvider* ?
When setRowData() is called on a data provider, the provider calls
setRowData() on every attached display.
I think setRowData is called on CellTable not
I am facing a dilemma best explained using a concrete example.
Look at the *New* Google Group application. (taking gwt group as an example)
when we are in the main place: #!forum/google-web-toolkit
there is a display region/activity to the left, which holds Home/Favorite
a display
Thank You,
I understand the difference between AsyncdataProvider and ListDataProvider.
my question was about AsyncDataProvider vs CellTable.setRowData.
I believe CellTable.setRowData can also load data Asynchronously.
I think Y2i is correct,
this is my understanding of Y2i comment, I might be
I would also like to know the solution to this.
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Y2i,
by storing the range on the server,
you make the server responsible for knowing at what page of result you
currently are,
instead of putting the responsibility on the client ?
in other words, your client tells the server, give me the next page
of result,
the client doesnt specifically says,
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