Examples of com.vaadin.server.VaadinSession.lock()

com.vaadin.server.VaadinSession.lock()
it is safe to update the UI. // UI.getCurrent can also be used myUI.getContent().setCaption("Changed safely"); } }); If you for whatever reason want to do locking manually, you should do it like:
```
 session.lock(); try { doSomething(); } finally { session.unlock(); } 
```
This method will block until the lock can be retrieved.
{@link #getLockInstance()} can be used if more control over the lockingis required. @see #unlock() @see #getLockInstance() @see #hasLock()

        }


        @Override
        public BeanStore getBeanStore() {
            VaadinSession session = getVaadinSession();
            session.lock();
            try {
                BeanStore beanStore = session.getAttribute(BeanStore.class);
                if (beanStore == null) {
                    beanStore = new BeanStore("session " + session.getSession().getId());
                    session.setAttribute(BeanStore.class, beanStore);

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            return current;
        }


        private UIStore getUIStore() {
            VaadinSession session = getVaadinSession();
            session.lock();
            try {
                UIStore uiStore = session.getAttribute(UIStore.class);
                if (uiStore == null) {
                    uiStore = new UIStore();
                    session.setAttribute(UIStore.class, uiStore);

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            if (session != null) {
                String name = ApplicationRunnerServlet.class.getName()
                        + ".deploymentConfiguration";
                try {
                    session.lock();
                    configuration = (DeploymentConfiguration) session
                            .getAttribute(name);


                    if (configuration == null) {
                        Class<?> classToRun;

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                                /*
                                 * Get explicit lock to ensure the (implicit)
                                 * push does not happen during normal request
                                 * handling.
                                 */
                                session.lock();
                                try {
                                    access(new Runnable() {
                                        @Override
                                        public void run() {
                                            checkCurrentInstancesBeforeResponse = true;

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        }


        DownloadStream stream;


        VaadinSession session = getSession();
        session.lock();
        try {
            List<URLReference> sources = getState().sources;


            int sourceIndex = Integer.parseInt(matcher.group(1));

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                                msg.getSessionExpiredURL()));
                return;
            }


            UI ui = null;
            session.lock();
            try {
                ui = service.findUI(vaadinRequest);
                assert UI.getCurrent() == ui;


                if (ui == null) {

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                            e);
            return;
        }


        UI ui = null;
        session.lock();
        try {
            VaadinSession.setCurrent(session);
            // Sets UI.currentInstance
            ui = service.findUI(vaadinRequest);
            if (ui == null) {

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            throw new UIDetachedException();
        }


        VaadinService.verifyNoOtherSessionLocked(session);


        session.lock();
        try {
            if (getSession() == null) {
                // UI was detached after fetching the session but before we
                // acquired the lock.
                throw new UIDetachedException();

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            throw new UIDetachedException();
        }


        VaadinService.verifyNoOtherSessionLocked(session);


        session.lock();
        try {
            if (getSession() == null) {
                // UI was detached after fetching the session but before we
                // acquired the lock.
                throw new UIDetachedException();

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        }


        DownloadStream stream;


        VaadinSession session = getSession();
        session.lock();
        try {
            List<URLReference> sources = getState().sources;


            int sourceIndex = Integer.parseInt(matcher.group(1));

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