Hi,
I am trying to integrate Vaadin XS in my app and I getting closer and closer to it. But there are still serious problems with the properly launch of the application.
The current main problem is firefox! (10.0.2)
Now I ve found a possible problem cause and could reproduce it with a simple hello world with XS Application:
@Override
public void init() {
Window mainWindow = new Window();
mainWindow.addComponent(new Label("Hello Problem"));
mainWindow.setImmediate(true);
setMainWindow(mainWindow);
}If I start this application in firefox and play with F5 or the reload browser button, I get Session expired or Internal Error message in the standard javascript alert with visible and
tags. This happens to me only with firefox! If I remove mainWindow.setImmediate(true) line, then firefox gets no problem. This is a very strange behavior.
If the session expired message occures, I get no exception in the server console. If the internal error occures, I get:
java.lang.ArrayIndexOutOfBoundsException: 1
at com.vaadin.terminal.gwt.server.AbstractCommunicationManager.handleVariableBurst(AbstractCommunicationManager.java:1365)
at com.vaadin.terminal.gwt.server.AbstractCommunicationManager.handleVariables(AbstractCommunicationManager.java:1318)
at com.vaadin.terminal.gwt.server.AbstractCommunicationManager.doHandleUidlRequest(AbstractCommunicationManager.java:763)
at com.vaadin.terminal.gwt.server.CommunicationManager.handleUidlRequest(CommunicationManager.java:296)
at com.vaadin.terminal.gwt.server.AbstractApplicationServlet.service(AbstractApplicationServlet.java:501)
at com.vaadin.addons.xs.server.XSApplicationServlet.service(XSApplicationServlet.java:97)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:304)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.springframework.orm.jpa.support.OpenEntityManagerInViewFilter.doFilterInternal(OpenEntityManagerInViewFilter.java:113)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:76)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:224)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:169)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:168)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:100)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:929)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:405)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:964)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:515)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:304)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
In the Hello World application the problem occures not often, but in average on every 5th hit.
In my real application I lose my session by reloading the tab very often and I cant find out why. Without XS I get no problems with reloading. And the problem occures only in Firefox. If I open a new firefox tab and load the application there, then I get no error. If I reload the application in the tab, I lose my session.
Are there some things which you not may do if you use XS Addon?
One of this things I could find out: dont switch main windows, it affects the XS stability and you get out of sync if you use Clickshortcuts on buttons.
I am a student and I decided to make a project with vaadin for the software engineering lecture. And the main feature of this project is the easy embedding of it in another websites. I would be very happy to hear any kind of tips. The project deadline is this friday 
//Edit:
I forgotten to say that the problem occures only if the vaadin application is configured as following in web.xml:
<servlet-mapping>
<servlet-name>My Servlet</servlet-name>
<url-pattern>/*</url-pattern>
</servlet-mapping>if its not matching the whole url, like in:
<servlet-mapping>
<servlet-name>My Servlet</servlet-name>
<url-pattern>/myapp/*</url-pattern>
</servlet-mapping>
<servlet-mapping>
<servlet-name>Some other Servlet</servlet-name>
<url-pattern>/*</url-pattern>
</servlet-mapping>then the My Servlet application works fine if you load it over the browser. The other servlet gets the same problem as described above.
I ve also tried to create a dummy application that get the whole errors and my real application work instead fine. It was a happiness for a minute, because my applications worked over the browser perfectly. But I cant embed them in another website. If I do it, then the app shows the error, that it cant find its widgetset. But my widgetset is for all application the same. I guess, it stucks because of the url, which consists not only the project name, but also the application name, like http://localhost:9090/project/appname/embedJS, The error shows that the widgetset must be in http://localhost:9090/project/appname/VAADIN/widgetsets…
kind regards and please forgive me my english
Vlad