Vaadin Servlet and Session is not loaded correct in 7.5.2

Vaadin 6 / 7 / 8
1

I use a UI(WX) to redirect the application to UI_TK(${URI}/TK?agent=${agent.id}) and UI_Reg(${URI}/Reg?code=${code}) based on some incoming parameters.

[code]
class WX extends UI {

@Override
protected void init(VaadinRequest request) {
    ......
    if(currentUser.isAuthenticated()){

…
getPage().setLocation(“${URI}/TK?agent=${agent.id}”)
}else{
…
getPage().setLocation(“${URI}/Reg?code=${code}”)
}
…
}
}
[/code]The servlet code is here:

class IncanaServlet extends TouchKitServlet {
    
    Log log = LogFactory.getLog(this.class)

    @Override
    protected void servletInitialized() throws ServletException {
        super.servletInitialized()
        
        getService().addSessionInitListener(new SessionInitListener() {
                    @Override
                    public void sessionInit(SessionInitEvent event) {
                        event.getSession().addBootstrapListener(new BootstrapListener(){
                                    @Override
                                    public void modifyBootstrapPage(BootstrapPageResponse response) {
                                        ......//Generate some element to add to body
                                        VaadinRequest vr = getService().getCurrentRequest()
                                        String URL = vr.getRequestURL().toString()
                                        //URI will be TK for register and Product for buying
                                        String URI = vr.getRequestURI()
                                        String query = vr.getQueryString()
                                        ........//Generate some element to add to body
                                        body.append(......)//Add the html element
                                    }

                                    @Override
                                    public void modifyBootstrapFragment(BootstrapFragmentResponse response) {
                                    }
                                })
                    }
                })
    }

When in Vaadin 7.4.7

The log shows the sessionInit is called after getPage().setLocation(“${URI}/TK?agent=${agent.id}”) and
before
 the UI_TK is loaded.

  • load UI_WX
  • load SessionInitListener(
    vr.getQueryString() is right)
  • load UI_TK

When in Vaadin 7.5.2

The log shows the sessionInit will be called 2 or 3 seconds later after getPage().setLocation(“${URI}/TK?agent=${agent.id}”) and
after
 the UI_TK is loaded.

  • load UI_WX
  • load UI_TK
  • (2 or 3 seconds later)load SessionInitListener(
    vr.getQueryString() is empty
    )

Which means the SessionInitListener can not get the real QueryString(): String query = vr.getQueryString()

I try several times and I think the only reason is the version of Vaadin!