Strange problem since switching to GWT 1.5
I moved my current project to GWT 1.5. While on 1.4 I had no problems
I encounter some strange problems using GWT 1.5. I already had a
problem that I was able to repair by recreating the project and copy
and pasting my old stuff into the newly created project. After that it
worked. I think that this was a problem that refered to GWT 1.5.
Now I'm facing a another problem, and I think it is also a GWT 1.5
specific problem, that makes absolutly no sense to me.
I created some objects:
package kiretose.server.universal;
import com.google.gwt.user.client.rpc.IsSerializable;
@javax.persistence.Entity
@javax.persistence.Table( name=ForumTopics )
public class TopicMetaInfo implements IsSerializable {
...here come Constructors, variables, setter/getter
Note that the annotations refer to Hibernate.
The object acutally is fine. I have some other objects that are quite
similar. They also implement IsSerializable.
Now when I try to run my app I get some error messages that are not
plausible to me:
[TRACE] Compiling Java source files in module 'kiretose.Index'
[TRACE] Removing units with errors
[ERROR] Errors in 'path/to/project/kiretose/src/kiretose/client/
forum/TopicWidget.java'
[ERROR] Line 12: No source code is available for type
kiretose.server.universal.TopicMetaInfo; did you forget to inherit a
required module?
If I look into TopicWidget.java
public class TopicWidget extends SimplePanel implements
AsyncCallbackObject,ClickListener {
TopicMetaInfo[] topicMetaInfos; //this is line 12
I get a whole bunch of error message of this type that I am not able
to understand. My app actually runs without problems. Maybee somebody
knows what is going on here?
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Re: Best practices
Hi, I would also be interested in seeing a set of best practices for writing the client-side portion of GWT apps. In the mean time, try the -style PRETTY parameter to your compiler. Looking at the generated JavaScript might give you some insight into how you might improve your java code. Tyler On Sep 25, 3:44 am, Stefan [EMAIL PROTECTED] wrote: Hi, Does anyone know any good resources for Best practices when writing GWT apps? Questions I would like to have answered: * How to I write high-performing apps? I know that the compiler helps out, but how do I write code that helps the compiler to minify/ optimize my app? * How does static and final assignments affect the performance of apps? Thanks in advance! Stefan --~--~-~--~~~---~--~~ 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 [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/Google-Web-Toolkit?hl=en -~--~~~~--~~--~--~---
Re: google-web-toolkit-incubator policy
Incubator is so experimental widget, and sometimes are done major refactoring (critical changes). Althought I'm happy using it at same time sometimes is so complicated to make changes between versions, because updated information on wiki not correspons sometimes with updated classes libraries, javadoc seems it's ok on that way. Any changelog it'll be necessarry to make upgrades more easilly. On Sep 26, 10:45 pm, Isaac Truett [EMAIL PROTECTED] wrote: I haven't seen a roadmap as such. But as an interested observer and user of Incubator components, I can tell you that they are actively developed and supported. They're also really useful. It's a much more fluid environment than the main GWT project which means you can get faster evolution of components, but it also means more frequent and severe breaking changes. There's a gen2 movement underway in the Incubator which includes re-working a lot of the existing Incubator components as well as an entirely new event system that looks very promising. I would encourage you to try out the Incubator. Just keep in mind that it's still a work in progress. - Isaac On Thu, Sep 18, 2008 at 4:33 AM, Sylvain [EMAIL PROTECTED] wrote: I would like to use 2 components included in your incubator toolkit ( FastTree and Tables with cell editors ). Can I have a road map to know when and if these components will be included in the future GWT official release? These 2 components were already in the last incubator 1.4 and were not included in the new GWT release 1.5. Could you please give more visiblity to your roadmap on GWT? --~--~-~--~~~---~--~~ 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 [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/Google-Web-Toolkit?hl=en -~--~~~~--~~--~--~---
Re: GWT Google Maps problem
Knowing the mechanism involved, I'm pretty sure its the same, but I'll sort
through all that on Monday and follow up.
On Sun, Sep 28, 2008 at 1:29 AM, Alexey Frishman
[EMAIL PROTECTED]wrote:
Hi, Eric
Thanks for quick response!
Should I raise a new issue or join existing one? It seems to me that
my problem is similar, but not the same as in issue No 156.
On Sep 28, 2:25 am, Eric Ayers [EMAIL PROTECTED] wrote:
Hi Alexey,
I don't think you are doing anything wrong. This sounds like the same
problem as issue 156 to me:
http://code.google.com/p/gwt-google-apis/issues/detail?id=156
I thought it was fixed in 1.0 RC1, but apparently not when the info
window
is used with a Marker class.
Please start the issue if you want to keep track of your progress.
-Eric.
On Sat, Sep 27, 2008 at 1:17 PM, Alexey Frishman
[EMAIL PROTECTED]wrote:
Hi
I use GWT Google Maps API and I have next problem.
I have click handler on each marker on my map. This handler opens info
window and creates Grid subclass widget inside it with some info.
The problem is that after clicking several times on different markers
and seeing appropriate info windows, I close next window and after
this all next windows are empty. So the widget inside all new windows
is not created or is created in wrong way...
That is the method in the click handler:
public void onClick(MarkerClickEvent event) {
Marker marker = event.getSender();
map.getInfoWindow().open(marker, new
InfoWindowContent(new
MapObjectInfo(data)));
map.setCenter(marker.getLatLng());
}
Here MapObjectInfo is subclass of the Grid Widget with some basic
initialization stuff.
Please advise me, if I do something wrong. May be this eats much
memory in Javascript, but I don't want to make RPC call every time I
open window on the marker. I want a group of markers be on client side
with all info for info window.
--
Eric Z. Ayers - GWT Team - Atlanta, GA USAhttp://
code.google.com/webtoolkit/
--
Eric Z. Ayers - GWT Team - Atlanta, GA USA
http://code.google.com/webtoolkit/
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Re: Strange problem since switching to GWT 1.5
I moved some of the objects into my client package. But still I get
these strange messages:
[TRACE] Compiling Java source files in module 'kiretose.Index'
[TRACE] Removing invalidated units
[WARN] Compilation unit 'path/to/project/kiretose/src/
kiretose/client/forum/TopicWidget.java' is removed due to invalid
reference(s):
[WARN] path/to/project/kiretose/src/kiretose/client/
TopicMetaInfo.java
Note that the TopicWidget is located in the client.forum package.
Another problem I encounter: If I try to create a custom Widget called
ForumWidget which is located in the client.forum package I get another
error message:
[TRACE] Finding entry point classes
[ERROR] Unable to find type 'kiretose.client.Index'
[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 required module or a module may not be
adding its source path entries properly
[ERROR] Failure to load module 'kiretose.Index'
I think there are some problems with the packages. But I do not
understand it because it is simply the same structured as I use in GWT
1.4. With the previous version I had absolutly no problems.
On 28 Sep., 12:45, Paul van Hoven [EMAIL PROTECTED]
wrote:
Thanks for the answer. How do I tell GWT to also look into the
server.universal package by default?
On 28 Sep., 11:27, Thomas Broyer [EMAIL PROTECTED] wrote:
On 28 sep, 11:01, Paul van Hoven [EMAIL PROTECTED]
wrote:
I created some objects:
package kiretose.server.universal;
import com.google.gwt.user.client.rpc.IsSerializable;
@javax.persistence.Entity
@javax.persistence.Table( name=ForumTopics )
public class TopicMetaInfo implements IsSerializable {
...here come Constructors, variables, setter/getter
Note that the annotations refer to Hibernate.
The object acutally is fine. I have some other objects that are quite
similar. They also implement IsSerializable.
Now when I try to run my app I get some error messages that are not
plausible to me:
[TRACE] Compiling Java source files in module 'kiretose.Index'
[TRACE] Removing units with errors
[ERROR] Errors in 'path/to/project/kiretose/src/kiretose/client/
forum/TopicWidget.java'
[ERROR] Line 12: No source code is available for type
kiretose.server.universal.TopicMetaInfo; did you forget to inherit a
required module?
If I look into TopicWidget.java
public class TopicWidget extends SimplePanel implements
AsyncCallbackObject,ClickListener {
TopicMetaInfo[] topicMetaInfos; //this is line 12
I get a whole bunch of error message of this type that I am not able
to understand. My app actually runs without problems. Maybee somebody
knows what is going on here?
Your TopicMetaInfo is in a .server.* package; GWT looks at client/
packages only (defaulting to client.* when not specified); that
might be why it doesn't find TopicMetaInfo's source code.
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Re: * No source code is available for type java.io.BufferedWriter; did you forget to inherit a required module?*
Too add to Lothar's comment, you can find which Java classes you can use on server side by referring here: http://code.google.com/docreader/#p=google-web-toolkit-doc-1-5s=google-web-toolkit-doc-1-5t=RefJreEmulation BufferedWriter and FileWriter are not included for the reasons already stated. //A On 27 Sep, 11:53, Manish Kumar [EMAIL PROTECTED] wrote: Hi everybody, Thanks all of you for providing continuos support to each other. I am trying to write a file on GWT Client ( inside the method onModuleLoad )using BufferedWriter and FileWriter. The problem is that It is compiled successfuly but on the run time it gives : * No source code is available for type java.io.BufferedWriter; did you forget to inherit a required module?* * No source code is available for type java.io.FileWriter; did you forget to inherit a required module?* * No source code is available for type java.io.IOException; did you forget to inherit a required module?* These seem a bit sily errors as I might not have included some required module or jar file,But troubling me a lot. I am using eclipse IDE and added all the jars to avoid any compilation error. And also is there any certian way to add module/lib/classpath for the same. Usually I use *configure Build Path* and manual edit of gwt.xml. Does this make any difference? Can anybody please help me out to simulate which is the required for the same? Thanking in advance. Regards Manish --~--~-~--~~~---~--~~ 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 [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/Google-Web-Toolkit?hl=en -~--~~~~--~~--~--~---
Re: Server Side File Saving
I'm not to familiar with the fitting content type, you maybe show me a clip of sample code? Does this then return the file as a bytestream or something? Also, because this new servlet I will have made will only be reference with some servlet mapping in the web.xml file, will the still work in hosted mode? As for using the RPC servlet, I don't see how doGet solves my problem. How is it fundamentally different form the doPost method used the the RPC? And I what I need to know is even if i did use either of these methods, on a high level, how does the file get passed from the server to the client? I would feel comfortable diving right into either these without at least having a vague understanding of what was happening. On Sep 27, 5:10 pm, Lothar Kimmeringer [EMAIL PROTECTED] wrote: Ned Racine schrieb: I also want to graph the results, and my original intention was to just save a .png of the graph in the public folder, but this is where I get hung up. I cannot get a reference to the public folder path, which I need for the client to see the file. Another way would be to call a servlet that is returning the picture with fitting content-type. The servlet can be placed at the same place where you RPC-servlet resides (adding it to the web.xml and the GWT.xml-file for hosted mode). You can also implement it in the RPC-servlet by implementing doGet (the RPC-mechanism works with POST) reducing the number of servlets needed for your application. I have done the exact same thing using Apache Struts before, but now that I'm using GWT I can't figure this out. Ideally I could find a solution where this would work in both web and hosted mode, but web mode would be the more important of the two obviously. The technique I described works in both modes and I use it here for the download of SQL-results as CSV-files and other stuff. 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 [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/Google-Web-Toolkit?hl=en -~--~~~~--~~--~--~---
Re: GWT Google Maps problem
Eric, thanks once more for your attention.
I've already created an issue
http://code.google.com/p/gwt-google-apis/issues/detail?id=181,
just to be sure it will be noticed by you (or somebody else?) and to
keep track how it is going.
One more question: will this fix be available in the trunk before next
release? Or you use another branches for fixed issues?
On Sep 28, 2:20 pm, Eric Ayers [EMAIL PROTECTED] wrote:
Knowing the mechanism involved, I'm pretty sure its the same, but I'll sort
through all that on Monday and follow up.
On Sun, Sep 28, 2008 at 1:29 AM, Alexey Frishman
[EMAIL PROTECTED]wrote:
Hi, Eric
Thanks for quick response!
Should I raise a new issue or join existing one? It seems to me that
my problem is similar, but not the same as in issue No 156.
On Sep 28, 2:25 am, Eric Ayers [EMAIL PROTECTED] wrote:
Hi Alexey,
I don't think you are doing anything wrong. This sounds like the same
problem as issue 156 to me:
http://code.google.com/p/gwt-google-apis/issues/detail?id=156
I thought it was fixed in 1.0 RC1, but apparently not when the info
window
is used with a Marker class.
Please start the issue if you want to keep track of your progress.
-Eric.
On Sat, Sep 27, 2008 at 1:17 PM, Alexey Frishman
[EMAIL PROTECTED]wrote:
Hi
I use GWT Google Maps API and I have next problem.
I have click handler on each marker on my map. This handler opens info
window and creates Grid subclass widget inside it with some info.
The problem is that after clicking several times on different markers
and seeing appropriate info windows, I close next window and after
this all next windows are empty. So the widget inside all new windows
is not created or is created in wrong way...
That is the method in the click handler:
public void onClick(MarkerClickEvent event) {
Marker marker = event.getSender();
map.getInfoWindow().open(marker, new
InfoWindowContent(new
MapObjectInfo(data)));
map.setCenter(marker.getLatLng());
}
Here MapObjectInfo is subclass of the Grid Widget with some basic
initialization stuff.
Please advise me, if I do something wrong. May be this eats much
memory in Javascript, but I don't want to make RPC call every time I
open window on the marker. I want a group of markers be on client side
with all info for info window.
--
Eric Z. Ayers - GWT Team - Atlanta, GA USAhttp://
code.google.com/webtoolkit/
--
Eric Z. Ayers - GWT Team - Atlanta, GA USAhttp://code.google.com/webtoolkit/
--~--~-~--~~~---~--~~
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Re: Strange issue with Date class
Ouf, looks like I did not get enough sleep last night. Thanks alot! On 28 sep, 19:25, Paul Robinson [EMAIL PROTECTED] wrote: Date uses zero-based integers for the month, so January is 0 and August is 7. getDay() returns the day of the week, with 2 being Tuesday. You probably wanted getDate() An alternative way would be to use com.google.gwt.i18n.client.DateTimeFormat Paul Xandrios wrote: Hi, I have noticed a strange problem with the Date class. Example: Date date = record.getAsDate(field); String dateString = (date.getMonth()+/+date.getDay()+/+ (date.getYear()+1900) + / +date.getTime()+ / +date.toString()); dateString now returns the following: 7/2/2010 / 128078640 / Tue Aug 03 00:00:00 CEST 2010 The timestamp and toString values are correct. However the date.getMonth() and date.getDay() are not. Does anybody have an idea what could be wrong here? Should I use another method to get the date as mm/dd/yyy string? I'm using GWT 1.5 by the way. 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-Toolkit@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/Google-Web-Toolkit?hl=en -~--~~~~--~~--~--~---
Re: Draw circle with gwt-maps library
I did it ! :)
With Polygon.. it's a bit long, but It's work...
I use the JS example in : http://maps.forum.nu/gm_sensitive_circle2.html
With GWT it is :
public void doDrawCircle(LatLng center, double radius) {
LatLng[] circlePoints = new LatLng[361];
Polygon circle;
double PI = 3.1415;
double d = radius / 6378.8; // radians
double lat1 = (PI / 180) * center.getLatitude(); // radians
double lng1 = (PI / 180) * center.getLongitude(); // radians
for (int a = 0; a 361; a++) {
double tc = (PI / 180) * a;
double y = Math.asin(Math.sin(lat1) * Math.cos(d) +
Math.cos(lat1)
* Math.sin(d) * Math.cos(tc));
double dlng = Math.atan2(Math.sin(tc) * Math.sin(d)
* Math.cos(lat1), Math.cos(d) -
Math.sin(lat1)
* Math.sin(y));
double x = ((lng1 - dlng + PI) % (2 * PI)) - PI; // MOD
function
LatLng point = LatLng.newInstance(y * (180 / PI), x *
(180 / PI));
circlePoints[a] = point;
}
circle = new Polygon(circlePoints, #FF, 1, 1.0,
#FF, .
7);
map.addOverlay(circle);
}
Thanks eric for Week-end support ;)
Samuel
On 28 sep, 00:47, Eric Ayers [EMAIL PROTECTED] wrote:
Actually, I was referring to the Maps API when I said I couldn't find a way
to do it.
On Sat, Sep 27, 2008 at 10:58 AM, Samuel [EMAIL PROTECTED] wrote:
Thanks eric,
I'm sure it's possible with Maps API, but with the gwt-maps API I
can't find solution.
Maybe it's a good solution to use image...
But I need use getBounds().containsLatLng(..) to known if a point is
in this circle. I'm not sure it's work with a picture...
Samuel
On 27 sep, 15:24, Eric Ayers [EMAIL PROTECTED] wrote:
Samuel,
You might want to go search the Maps API google group for this one. I
don't
see an obvious way to make one (like a GCircle or GEllipse class).
The geodesic polyline support uses a segmented line to represent an arc.
You could do that by creating a lot of points out for a Polygon.
Another way you could do this is to create an image of a circle and then
make a GroundOverlay out of it. It would look a bit different from a
Polyline or Polygon.
-Eric.
On Sat, Sep 27, 2008 at 3:58 AM, Samuel [EMAIL PROTECTED] wrote:
Hi,
I have a very simple question :)
How draw a circle in a maps with gwt-maps library ?
Have you got an example ? (I do Polygon but I can't make circle :( )
Thanks
Samuel
--
Eric Z. Ayers - GWT Team - Atlanta, GA USAhttp://
code.google.com/webtoolkit/
--
Eric Z. Ayers - GWT Team - Atlanta, GA USAhttp://code.google.com/webtoolkit/
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Re: Strange issue with Date class
Date uses zero-based integers for the month, so January is 0 and August is 7. getDay() returns the day of the week, with 2 being Tuesday. You probably wanted getDate() An alternative way would be to use com.google.gwt.i18n.client.DateTimeFormat Paul Xandrios wrote: Hi, I have noticed a strange problem with the Date class. Example: Date date = record.getAsDate(field); String dateString = (date.getMonth()+/+date.getDay()+/+ (date.getYear()+1900) + / +date.getTime()+ / +date.toString()); dateString now returns the following: 7/2/2010 / 128078640 / Tue Aug 03 00:00:00 CEST 2010 The timestamp and toString values are correct. However the date.getMonth() and date.getDay() are not. Does anybody have an idea what could be wrong here? Should I use another method to get the date as mm/dd/yyy string? I'm using GWT 1.5 by the way. 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-Toolkit@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/Google-Web-Toolkit?hl=en -~--~~~~--~~--~--~---
datepicker
Hi, i need your help...please i want to create a date picker .but dont know how. 1) i have download the gwt-incubator.jar but dont know how to add this to my existing project in the eclips. 2) http://code.google.com/p/google-web-toolkit-incubator/wiki/MakingIncubatorBetter . i have read this insrtuction but did not get anything. 3) i have downloade a sample code from the below link http://code.google.com/docreader/#p=google-web-toolkit-incubators=google-web-toolkit-incubatort=DatePicker but dont know how to execut this. an any one tell me how to run this code... Thanks Anand --~--~-~--~~~---~--~~ 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 [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/Google-Web-Toolkit?hl=en -~--~~~~--~~--~--~---
Form submitted twice?
I used the code provided as an example in http://google-web-toolkit.googlecode.com/svn/javadoc/1.5/com/google/gwt/user/client/ui/FormPanel.html to build a form panel. However, the form seems to get submitted twice as the Window.alert(The text box must not be empty); is executed twice. Any ideas as for why this happens? Regards, Marcel --~--~-~--~~~---~--~~ 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 [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/Google-Web-Toolkit?hl=en -~--~~~~--~~--~--~---
Re: GWT Google Maps problem
Hi Alexey,
I will be making these fixes in the release branch svn/releases/maps/1.0,
and periodically merging the fixes back into the trunk.
On Sun, Sep 28, 2008 at 1:25 PM, Alexey Frishman
[EMAIL PROTECTED]wrote:
Eric, thanks once more for your attention.
I've already created an issue
http://code.google.com/p/gwt-google-apis/issues/detail?id=181,
just to be sure it will be noticed by you (or somebody else?) and to
keep track how it is going.
One more question: will this fix be available in the trunk before next
release? Or you use another branches for fixed issues?
On Sep 28, 2:20 pm, Eric Ayers [EMAIL PROTECTED] wrote:
Knowing the mechanism involved, I'm pretty sure its the same, but I'll
sort
through all that on Monday and follow up.
On Sun, Sep 28, 2008 at 1:29 AM, Alexey Frishman
[EMAIL PROTECTED]wrote:
Hi, Eric
Thanks for quick response!
Should I raise a new issue or join existing one? It seems to me that
my problem is similar, but not the same as in issue No 156.
On Sep 28, 2:25 am, Eric Ayers [EMAIL PROTECTED] wrote:
Hi Alexey,
I don't think you are doing anything wrong. This sounds like the
same
problem as issue 156 to me:
http://code.google.com/p/gwt-google-apis/issues/detail?id=156
I thought it was fixed in 1.0 RC1, but apparently not when the info
window
is used with a Marker class.
Please start the issue if you want to keep track of your progress.
-Eric.
On Sat, Sep 27, 2008 at 1:17 PM, Alexey Frishman
[EMAIL PROTECTED]wrote:
Hi
I use GWT Google Maps API and I have next problem.
I have click handler on each marker on my map. This handler opens
info
window and creates Grid subclass widget inside it with some info.
The problem is that after clicking several times on different
markers
and seeing appropriate info windows, I close next window and after
this all next windows are empty. So the widget inside all new
windows
is not created or is created in wrong way...
That is the method in the click handler:
public void onClick(MarkerClickEvent event) {
Marker marker = event.getSender();
map.getInfoWindow().open(marker, new
InfoWindowContent(new
MapObjectInfo(data)));
map.setCenter(marker.getLatLng());
}
Here MapObjectInfo is subclass of the Grid Widget with some basic
initialization stuff.
Please advise me, if I do something wrong. May be this eats much
memory in Javascript, but I don't want to make RPC call every time
I
open window on the marker. I want a group of markers be on client
side
with all info for info window.
--
Eric Z. Ayers - GWT Team - Atlanta, GA USAhttp://
code.google.com/webtoolkit/
--
Eric Z. Ayers - GWT Team - Atlanta, GA USAhttp://
code.google.com/webtoolkit/
--
Eric Z. Ayers - GWT Team - Atlanta, GA USA
http://code.google.com/webtoolkit/
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Re: Server Side File Saving
Ned Racine schrieb:
I'm not to familiar with the fitting content type, you maybe show me
a clip of sample code?
public class MyServlet extends HttpServlet{
public void doGet(HttpServletRequest req, HttpServletResponse resp)
throws ServletException, java.io.IOException{
byte[] data = getTheFileData(req);
resp.setContentType(image/jpeg);
resp.getOutputStream().write(data);
}
}
getTheFileData(req) is an imaginary method that is getting the
image-data as byte-array. This can be done by reading it from
a created file (that is deleted after that) or you create the
image dynamically, etc.
I pass req to that method, because in HttpServletRequest
you have all the informations about the request, e.g.
the Cookies, the query-string, pathinfo, etc.
Does this then return the file as a bytestream
or something?
More or less. To enable the browser to interpret the byte-
data as image, you have to set the content-type header.
Also, because this new servlet I will have made will
only be reference with some servlet mapping in the web.xml file, will
the still work in hosted mode?
No, you have to add a servlet-path-entry in your project's
gwt.xml-file.
As for using the RPC servlet, I don't see how doGet solves my
problem. How is it fundamentally different form the doPost method
used the the RPC?
It means, that you can also avoid creating a second servlet but
put in the doGet-method inside your RemoteServiceServlet. Because
a GET-request will lead to the execution of the doGet-method you
don't need to worry that you break something because all the
regular RPC-request are handled by the doPost-method.
But there is no reason, why you don't overwrite doPost as
well. You just have to call super.doPost(...) to let the
RemoteServiceServlet do its job. I use this for example for
file-uploading, i.e. I check if the request is a result of
a started file-upload and - if it's not - call super.doPost.
And I what I need to know is even if i did use
either of these methods, on a high level, how does the file get passed
from the server to the client?
See above.
I would feel comfortable diving right
into either these without at least having a vague understanding of
what was happening.
You can read about the servlet-API (that is used here) e.g.
at http://java.sun.com/products/servlet/2.2/javadoc/
for the low-level-information (aka Javadocs). There are
also tutorials out there, e.g.
http://www.apl.jhu.edu/~hall/java/Servlet-Tutorial/
Regards, Lothar
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ArrayIndexOutOfBoundsException with ant compilation
Hi,
I've run into a very funny problem here, I've got an skeleton project
which I generated with applicationCreator, I then wrote a ant target:
target name=gwt-compile
java classname=com.google.gwt.dev.GWTCompiler
fork=yes
failonerror=true
classpath=${src};${java.class.path};$
{classpath.compile}
jvmarg value=-Xmx256M /
arg value=-logLevel /
arg value=ALL /
arg value=-out /
arg file=${www} /
arg value=${gwt.module.id} /
/java
/target
The above target gives me this error:
Exception in thread main java.lang.ArrayIndexOutOfBoundsException:
-2
[java] at
org.eclipse.jdt.internal.compiler.parser.Parser.concatExpressionLists(Parser.java:
1185)
[java] at
org.eclipse.jdt.internal.compiler.parser.Parser.consumeDimWithOrWithOutExprs(Parser.java:
2694)
[java] at
org.eclipse.jdt.internal.compiler.parser.Parser.consumeRule(Parser.java:
5681)
[java] at
org.eclipse.jdt.internal.compiler.parser.Parser.parse(Parser.java:
9020)
[java] at
org.eclipse.jdt.internal.compiler.parser.Parser.parse(Parser.java:
9251)
[java] at
org.eclipse.jdt.internal.compiler.parser.Parser.parse(Parser.java:
9208)
[java] at
org.eclipse.jdt.internal.compiler.parser.Parser.dietParse(Parser.java:
7864)
[java] at
org.eclipse.jdt.internal.compiler.Compiler.internalBeginToCompile(Compiler.java:
587)
[java] at
org.eclipse.jdt.internal.compiler.Compiler.beginToCompile(Compiler.java:
357)
[java] at
org.eclipse.jdt.internal.compiler.Compiler.compile(Compiler.java:371)
[java] at
com.google.gwt.dev.javac.JdtCompiler.doCompile(JdtCompiler.java:277)
[java] at
com.google.gwt.dev.javac.JdtCompiler.compile(JdtCompiler.java:193)
[java] at
com.google.gwt.dev.javac.CompilationState.compile(CompilationState.java:
115)
[java] at
com.google.gwt.dev.GWTCompiler.distill(GWTCompiler.java:327)
[java] at com.google.gwt.dev.GWTCompiler.run(GWTCompiler.java:
564)
[java] at com.google.gwt.dev.GWTCompiler.run(GWTCompiler.java:
554)
[java] at com.google.gwt.dev.GWTCompiler.main(GWTCompiler.java:
214)
However, If I compile it with the shellscript generated by
applicationCreator which is basically the same command, it compiles
fine.
I'm probably missing something trivial, but can anybody point me in
the right direction?
Thanks in advance.
-- Joe
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How to use any external java API in GWT application
Hi, i am new to this GWT, i searched the net also for my problem but didnt got any solution. In my gwt application there is a textbox. i m calling weblogic APIs to get some value from weblogic server, and i want to put that value in that gwt textbox. But it seems like it is not possible in gwt..is it.. !!! i have put weblogic.jar file in the gwt application classpath. please help me to do this. Thanx, Manish Kumar --~--~-~--~~~---~--~~ 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 [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/Google-Web-Toolkit?hl=en -~--~~~~--~~--~--~---
GWT with struts
Hi we have a project which uses struts 1.2 . and now started using GWT ..for security we want GWT to call struts action.is it possible? if so how? thanks in advance sruj --~--~-~--~~~---~--~~ 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 [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/Google-Web-Toolkit?hl=en -~--~~~~--~~--~--~---
Re: How Google Moderator (GWT) connect to App Engine?
or http://code.google.com/p/gae-json-rest/ On Sep 29, 2:05 am, van der maar [EMAIL PROTECTED] wrote: maybe it is usinghttp://code.google.com/p/python-gwt-rpc/ On Sep 26, 7:04 pm, Gudgee [EMAIL PROTECTED] wrote: seehttp://moderator.appspot.com Do you know how to google developer used? --~--~-~--~~~---~--~~ 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 [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/Google-Web-Toolkit?hl=en -~--~~~~--~~--~--~---
Re: How to use any external java API in GWT application
A Gwt application is compiled into javascript and run on client browser, then it isn't possible to directly call any external java API (well, you can if that api is also compiled into javascript). Instead, your GWT application have to call a server service which call your API. To do that you can use any kind of request (see HTTPRequest class) but it's by far easier to use a GWT RPC call. Vincent On 29 sep, 06:56, Manish Kumar [EMAIL PROTECTED] wrote: Hi, i am new to this GWT, i searched the net also for my problem but didnt got any solution. In my gwt application there is a textbox. i m calling weblogic APIs to get some value from weblogic server, and i want to put that value in that gwt textbox. But it seems like it is not possible in gwt..is it.. !!! i have put weblogic.jar file in the gwt application classpath. please help me to do this. Thanx, Manish Kumar --~--~-~--~~~---~--~~ 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 [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/Google-Web-Toolkit?hl=en -~--~~~~--~~--~--~---
Background color for DecoratedTabPanel
Hi, I am not able to change the background color of DecoratedTabPanel tab baritems. I tried to use background attribute in - .gwt- DecoratedTabPanel .gwt-TabBarItem but it doesn't work. Please help me on this issue. Thanks, Shridhar --~--~-~--~~~---~--~~ 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 [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/Google-Web-Toolkit?hl=en -~--~~~~--~~--~--~---
[gwt-contrib] Re: gwt compiler issue in 1.5 branch
w00t! On Sat, Sep 27, 2008 at 8:16 PM, Cameron Braid [EMAIL PROTECTED] wrote: Sorry, my mistake. I had an old jar on the classpath. r3683 compiles just fine. Thanks for pointing this out. Regards Cameron --~--~-~--~~~---~--~~ http://groups.google.com/group/Google-Web-Toolkit-Contributors -~--~~~~--~~--~--~---
