Need to help in parameter handler

General
1

The current situation is following. I have vaadin appllication what is deployed to liferay portal.
My application listening parameters, but I can get any parameters because it is inside portal.
I found one solution to get parameter in liferay using following code:

[code]

HttpServletRequest httpReq = PortalUtil.getOriginalServletRequest(PortalUtil.getHttpServletRequest(req));
String myArticleId = httpReq.getParameter(“articleId”);

[/code], but it doesn’t help me because I don’t known current httprequest inside parameterhandler

Doesn’t anyone know any workaround?

This is my current code:


		Window mainWindow = new Window("app");
		final Label label = new Label("Hello Vaadin user");

		ParameterHandler handler = new ParameterHandler() {

			@Override
			public void handleParameters(Map parameters) {
				System.out.println("parametreja " + parameters.size());
				for (Object key : parameters.keySet()) {
					System.out.println("key " + key + " == "
							+ parameters.get(key));
				}
				if (parameters.containsKey("parameter")) {
					label.setCaption("parameter " + parameters.get("u"));
				} else {
					label.setCaption("Parameter not found");
				}
			}
		};
		mainWindow.addParameterHandler(handler);
2

ParameterHandler is a bit higher level place, there is no http request object instance. Probably, implementing your TransactionListener is what you need

3

I don’t understand how to TransactionListener can help me? There is only method for listening start and end transaction but parameters can come in many times in one transaction.

4

Vaadin “transaction” equals “http request”.

/**
     * Vaadin "transaction" equals "http request".  This method fires for all servlets
     * in the session.
     */
    private void attachHttpRequestListener() {
        getContext().addTransactionListener(new TransactionListener() {
			private static final long serialVersionUID = -2365336986843262181L;

			public void transactionStart(Application application,
                    Object transactionData) {
        		((LocalizedSystemMessages)getSystemMessages()).setThreadLocale(getLocale());
        		current.set(CompetitionApplication.this);  // make the application available via ThreadLocal
        		HttpServletRequest request = (HttpServletRequest)transactionData;
        		request.getSession(true).setMaxInactiveInterval(3600);
            }
            
			public void transactionEnd(Application application,
                    Object transactionData) {
                // Transaction listener gets fired for all (Http) sessions
                // of Vaadin applications, checking to be this one.
                if (application == CompetitionApplication.this) {
                    closeHibernateSession();
                }
            }
        });
    }