date:20120523

Null pointer

2012-05-23 Thread SCK

Hi

 I try to connect to my database with GWT RPC. But i get a error.

Help please

Thks



java.lang.NullPointerException
at
org.etude.gwt.server.DatabaseServiceImpl.saveData(DatabaseServiceImpl.java:
37)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at
com.google.gwt.user.server.rpc.RPC.invokeAndEncodeResponse(RPC.java:
569)
at
com.google.gwt.user.server.rpc.RemoteServiceServlet.processCall(RemoteServiceServlet.java:
208)
at
com.google.gwt.user.server.rpc.RemoteServiceServlet.processPost(RemoteServiceServlet.java:
248)
at
com.google.gwt.user.server.rpc.AbstractRemoteServiceServlet.doPost(AbstractRemoteServiceServlet.java:
62)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:637)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:
487)
at
org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:
362)
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:
729)
at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:
405)
at
org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:
152)
at
org.mortbay.jetty.handler.RequestLogHandler.handle(RequestLogHandler.java:
49)
at
org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:
152)
at org.mortbay.jetty.Server.handle(Server.java:324)
at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:
505)
at org.mortbay.jetty.HttpConnection
$RequestHandler.content(HttpConnection.java:843)
at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:647)
at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:205)
at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:380)
at
org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:
395)
at org.mortbay.thread.QueuedThreadPool
$PoolThread.run(QueuedThreadPool.java:488)





package org.etude.gwt.server;

import java.net.URLDecoder;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.Statement;
import java.util.Map;

import org.etude.gwt.client.DatabaseService;

import com.google.gwt.user.server.rpc.RemoteServiceServlet;

public class DatabaseServiceImpl extends RemoteServiceServlet
implements
DatabaseService {

/**
 *
 */
private static final long serialVersionUID = 1L;

@SuppressWarnings(rawtypes)
@Override
public void saveData(Map formData) throws IllegalArgumentException {

try{
Class.forName(com.mysql.jdbc.Driver);
Connection conn = 
DriverManager.getConnection(jdbc:mysql://
localhost:3306/oracle, root, );

Statement st = conn.createStatement();

//avec décodage
StringBuffer sqlQuery = new StringBuffer(insert into
gwtusers(username,password,email,phone));
sqlQuery.append(values(?,?,?,?));

PreparedStatement stmt =
conn.prepareStatement(sqlQuery.toString());
LINE 37
stmt.setString(1,URLDecoder.decode(formData.get(username).toString(),UTF-8));

stmt.setString(2,URLDecoder.decode(formData.get(password).toString(),UTF-8));

stmt.setString(3,URLDecoder.decode(formData.get(email).toString(),UTF-8));

stmt.setString(4,URLDecoder.decode(formData.get(phone).toString(),UTF-8));
stmt.execute();

//sans décodage
st.executeQuery(insert into gwtusers values
('+formData.get(username).toString()+

','+formData.get(password).toString()+
','+formData.get(email).toString()+

','+formData.get(phone).toString()+'));

conn.close();
//stmt.close();
//st.close();


}catch(Exception e){
e.printStackTrace();
}

}

}

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Re: GWT (lazy) Widget rendering: Comparison of approaches

2012-05-23 Thread Δημήτριος Μενούνος

I have written a blog post about this issue. See:

http://zoomblab.blogspot.com/2010/10/creating-custom-lazily-rendered-gwt.html

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Re: GWT (lazy) Widget rendering: Comparison of approaches

2012-05-23 Thread Thomas Broyer


On Wednesday, May 16, 2012 4:03:40 PM UTC+2, Chris Lercher wrote:

 There are several competing (or complemental) new/experimental (or 
 deprecated) classes around, which deal with rendering Widgets in 
 alternative (often lazy) ways in GWT:

 - GXT2's lazy 
 Componenthttp://grepcode.com/file/repo1.maven.org/maven2/com.extjs/gxt/2.2.0/com/extjs/gxt/ui/client/widget/Component.java
  (which 
 has been deprecated in GXT3)
 - 
 LazyPanelhttp://google-web-toolkit.googlecode.com/svn/javadoc/latest/com/google/gwt/user/client/ui/LazyPanel.html
 - 
 PotentialElementhttp://google-web-toolkit.googlecode.com/svn/javadoc/latest/com/google/gwt/user/client/ui/PotentialElement.html
  [experimental]
 - 
 IsRenderablehttp://google-web-toolkit.googlecode.com/svn/javadoc/latest/com/google/gwt/user/client/ui/IsRenderable.html
  [very 
 experimental] and 
 RenderablePanelhttp://google-web-toolkit.googlecode.com/svn/javadoc/latest/com/google/gwt/user/client/ui/RenderablePanel.html
  [experimental]

 Seeing how GXT2 had problems with their lazy rendering, what can we expect 
 from these concepts? Looking into trunk, IsRenderable seems to evolve 
 (using a new RenderableStamper class), so there's probably something in the 
 pipeline...

 I know, that this is not a concrete question - I'm just curious if someone 
 has interesting information about this subject?


AFAICT, PotentialElement and IsRenderable are to speed-up rendering of 
widgets, particularly when used within an HTMLPanel or RenderablePanel in a 
UiBinder template: the widget is rendered to SafeHtml (and stamped), 
concatenated to the HTML of the containing HTMLPanel and rendered as a 
single big HTML string, then the stamped element is retrieved out of the 
HTMLPanel and the widget is attached to it (claimElement) and finally 
logically attached to the HTMLPanel (as its parent widget).
I suppose they could also be used to attach widgets to some HTML generated 
(pre-rendered) on the server-side (similar to Closure's decorate(), and the 
various static wrap() methods used in basic GWT widgets; there's no 
notion of canDecorate() as in Closure though, so it'd be your 
responsibility to build this into your widgets; not really for reusable 
widgets, more for applications you control from end-to-end).

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Unable to install GWT in Eclipse(Helios)

2012-05-23 Thread @$#

Hi,

I am new to GWT. While installing GWT in Eclipse I am getting a below
error.
An error occurred while collecting items to be installed
session context was:(profile=epp.package.jee,
phase=org.eclipse.equinox.internal.p2.engine.phases.Collect, operand=,
action=).
Unable to read repository at
http://dl.google.com/eclipse/plugin/core/3.6/plugins/com.google.gwt.eclipse.sdkbundle_2.4.0.v201205091048-rel-r36.jar.

Please help me out to resolve this error.

Thnks

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user session log module/plugin for GWT

2012-05-23 Thread Cyryl Kwaśniewski

Hello, 

I'm looking for a tool that would allow me to log user sessions with exact 
interactions and activity flows (or something that would allow my to 
conclude) in large GWT application. The problem is that it was written in 
such a way that there's only a single URL invoked once after logging in.

Do any modules/plugin for GWT exist that would output the user interaction 
to some kind of a log?

Kind regards,
Cyryl

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GWT Browser Dev-Plugin

2012-05-23 Thread Fabio

Hi All,

I get an error 404 while downloading GWT Dev Plugin for IE9. (https://
dl-ssl.google.com/tag/s/appguid%3D%7B9a5e649a-
ec63-4c7d-99bf-75adb345e7e5%7D%26lang%3Den%26appname%3DGWT
%2520Developer%2520Plugin%2520for%2520IE%2520%2528x86%2529%26needsadmin
%3Dfalse/gwt/plugins/ie/GwtDevPluginSetup.exe)

404. That’s an error.

The requested URL /tag/s/appguid%3D%7B9a5e649a-
ec63-4c7d-99bf-75adb345e7e5%7D%26lang%3Den%26appname%3DGWT
%2520Developer%2520Plugin%2520for%2520IE%2520%2528x86%2529%26needsadmin
%3Dfalse/gwt/plugins/ie/GwtDevPluginSetup.exe was not found on this
server. That’s all we know.

Thank u very much for your help!
Fabio

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couldn't load panel till resize

2012-05-23 Thread Maroua OUESLATI

Hey,
I'm a newbie in GWT, I'm developing an application about displaying charts.
After loading the page, I have to resize the panel manually to get my chart
loaded.
(Because I activated Resizable option  resize = new Resizable(panel);
resize.setMinHeight(400);
resize.setMinWidth(400);
   )

I do need your help, any suggestion would help me.
Thank you

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Re: Is this a bug in RequestFactory when a collection has a null? Resolver.class ...

2012-05-23 Thread Stephen Nelson

As you know from the bug report you linked to this bug has been marked as 
fixed, not released. Posting a new comment on a bug that has been closed is 
not very helpful -- it only distracts busy developers from fixing actual 
bugs. Wait for the fix to be released in the next version of GWT then check 
that it solves your bug.

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GWT + Hibernate + MySQL inside Eclipse

2012-05-23 Thread Bill Compton

Our Hibernate setup works fine in non-GWT projects. I'm using Eclipse
Indigo, Google Suite Plugin 2.5, Google GWT Designer 2.4.2.

The short-short version is that the MysqlConnectionPoolDataSource class
from jetty-env.xml is evidently not getting instantiated, causing the
resource reference from web.xml to fail.

Here are the steps I took and excerpts of files that I think matter.
(Apologies in advance - this is a bit verbose but wanted to be sure my
question is complete and clear.)

My war/WEB-INF/classes/hibernate.cfg.xml includes:
property name=hibernate.connection.datasource
*java:comp/env/jdbc/nndb
*/property

A service class AuthenticateServiceImpl.authenticate(Credentials c) calls
DAOFactory.getDefaultInstance().getCustomerDAO();
The above works fine in my pure tomcat (non-GWT project). But in the GWT
project it fails with:
SEVERE: Could not find datasource: java:comp/env/jdbc/nndb
javax.naming.NameNotFoundException; remaining name 'jdbc/nndb'
So, I added following entry to web.xml:
resource-ref
descriptionNN Database Connection Pooling/description
res-ref-name*jdbc/nndb*/res-ref-name
res-type*javax.sql.DataSource*/res-type
res-authContainer/res-auth
res-sharing-scopeShareable/res-sharing-scope
/resource-ref
and also created CustomJettyLauncher as described
herehttp://webtide.intalio.com/2011/08/gwt-and-jndi/
.
and added Eclipse run config to use it (Run Config Arguments -server
comCustomJettyLauncher)
This results in:
jetty-6.1.x
[WARN] Configuration problem at resource-refdescriptionNN Database
Connection
Pooling/descriptionres-ref-namejdbc/nndb/res-ref-nameres-typejavax.sql.DataSource/res-typeres-authContainer/res-authres-sharing-scopeShareable/res-sharing-scope/resource-ref
java.lang.IllegalStateException: Nothing to bind for name *
javax.sql.DataSource/default*

Presumably at this point I need an entry in either the jetty-env.xml or
jetty-web.xml file (which?) defining the resource. I tried jetty-env.xml:
?xml version=1.0? !DOCTYPE Configure PUBLIC -//Mort Bay
Consulting//DTD Configure//EN http://jetty.mortbay.org/configure.dtd;
Configure class=org.mortbay.jetty.webapp.WebAppContext
New id=nndb class=org.mortbay.jetty.plus.naming.Resource
Argj*dbc/nndb*/Arg
Arg New
class=com.mysql.jdbc.jdbc2.optional.MysqlConnectionPoolDataSource
Set name=Urljdbc:mysql://*dbserver/dbname*/Set
Set name=User*dbuser*/Set
Set name=Password*dbpasswd*/Set
/New
/Arg
/New
/Configure

But the above error (Nothing to bind for name javax.sql.DataSource/default)
remains. Interestingly, if I intentionally bugger up the datasource
classname (e.g.
NOSUCH.com.mysql.jdbc.jdbc2.optional.MysqlConnectionPoolDataSource) there's
no gripe, so it may not even be trying to instantiate that class. (Similar
tracer errors for WebAppContext and Resource *DO* produce gripes, so it's
only ConnectionPoolDataSource that it's not trying to instantiate.)

I also tried using a jetty-web.xml file but that is evidently not getting
read at all.

Whew!

Does anyone see what's wrong? Any recommendations would be greatly
appreciated.

Thanks in advance!

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