Examples of com.vaadin.server.VaadinSession

com.vaadin.server.VaadinSession
Contains everything that Vaadin needs to store for a specific user. This is typically stored in a {@link HttpSession} or {@link PortletSession}, but others storage mechanisms might also be used.
Everything inside a {@link VaadinSession} should be serializable to ensurecompatibility with schemes using serialization for persisting the session data. @author Vaadin Ltd @since 7.0.0

            throws JSONException, IOException {
        StringWriter writer = new StringWriter();
        try {
            writer.write("{");


            VaadinSession session = uI.getSession();
            if (session.getConfiguration().isXsrfProtectionEnabled()) {
                writer.write(getSecurityKeyUIDL(session));
            }
            new UidlWriter().write(uI, writer, true, false);
            writer.write("}");

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     * @throws JSONException
     *             If the JSON serialization fails.
     */
    public void write(UI ui, Writer writer, boolean repaintAll, boolean async)
            throws IOException, JSONException {
        VaadinSession session = ui.getSession();


        // Purge pending access calls as they might produce additional changes
        // to write out
        session.getService().runPendingAccessTasks(session);


        ArrayList<ClientConnector> dirtyVisibleConnectors = ui
                .getConnectorTracker().getDirtyVisibleConnectors();
        LegacyCommunicationManager manager = session.getCommunicationManager();
        // Paints components
        ConnectorTracker uiConnectorTracker = ui.getConnectorTracker();
        getLogger().log(Level.FINE, "* Creating response to client");


        getLogger().log(

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        if (pushMode == null) {
            throw new IllegalArgumentException("Push mode cannot be null");
        }


        if (pushMode.isEnabled()) {
            VaadinSession session = ui.getSession();
            if (session != null && !session.getService().ensurePushAvailable()) {
                throw new IllegalStateException(
                        "Push is not available. See previous log messages for more information.");
            }
        }

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        }
        HasComponents parent = getParent();
        if (parent != null) {
            return parent.getLocale();
        }
        final VaadinSession session = getSession();
        if (session != null) {
            return session.getLocale();
        }
        return null;
    }

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    /**
     * Sets the focus for this component if the component is {@link Focusable}.
     */
    protected void focus() {
        if (this instanceof Focusable) {
            final VaadinSession session = getSession();
            if (session != null) {
                getUI().setFocusedComponent((Focusable) this);
                delayedFocus = false;
            } else {
                delayedFocus = true;

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