Example usage for com.vaadin.server VaadinSession getLockInstance

Introduction

In this page you can find the example usage for com.vaadin.server VaadinSession getLockInstance.

Prototype

public Lock getLockInstance() 

Source Link

Document

Gets the Lock instance that is used for protecting the data of this session from concurrent access.

Usage

From source file:com.garyclayburg.vconsole.TargetWindows.java

License:Open Source License

void populateTarget(User selectedUser, String entitledTarget) {
    Window window = targetWindows.get(entitledTarget);
    if (window != null) {
        UI ui = window.getUI();//w w  w. j  av  a 2 s .c  o  m
        if (ui != null) {
            VaadinSession session = ui.getSession();
            if (session != null) {
                session.getLockInstance().lock();
                try {
                    VerticalLayout windowContent = populateTargetWindowData(selectedUser, entitledTarget);
                    window.setContent(windowContent);

                } finally {
                    session.getLockInstance().unlock();
                }
            }
        }
    }
}

---

From source file:com.garyclayburg.vconsole.VConsole.java

License:Open Source License

private void updateRightClickItems() {
    UI ui = userTable.getUI();// w  w w  . j  a va 2 s  .  c o  m
    if (ui != null) {
        VaadinSession session = ui.getSession();
        if (session != null) {
            session.getLockInstance().lock();
            try {
                userTable.refreshRowCache(); // force right-click menu item update for possible change to valid menu items based on policy
            } finally {
                session.getLockInstance().unlock();
            }
        }
    }
}

---

From source file:com.garyclayburg.vconsole.VConsole.java

License:Open Source License

private void populateExceptionMessage(String message, boolean visible) {
    VerticalLayout windowContent = new VerticalLayout();
    windowContent.setMargin(true);/*from   ww w.  ja v a2s  . c  o m*/

    Label messageLabel = new Label(message, ContentMode.PREFORMATTED);
    messageLabel.setStyleName(Runo.LABEL_SMALL);
    //        messageLabel.setWidth("120em");
    windowContent.addComponent(messageLabel);
    Button closeButton = new Button("Close");
    closeButton.addClickListener(new Button.ClickListener() {
        @Override
        public void buttonClick(Button.ClickEvent event) {
            exceptionWindow.setVisible(false);
        }
    });

    windowContent.addComponent(closeButton);
    UI ui = exceptionWindow.getUI();
    if (ui != null) {
        VaadinSession session = ui.getSession();
        if (session != null) {
            session.getLockInstance().lock();
            try {
                exceptionWindow.setContent(windowContent);
                exceptionWindow.setVisible(visible);
            } finally {
                session.getLockInstance().unlock();
            }
        } else {
            exceptionWindow.setContent(windowContent);
            exceptionWindow.setVisible(visible);
        }
    } else {
        exceptionWindow.setContent(windowContent);
        exceptionWindow.setVisible(visible);
    }
}

---

From source file:com.garyclayburg.vconsole.VConsole.java

License:Open Source License

@Override
public void userChanged(User user) {
    log.info("user is changing: " + user.getFirstname());
    BeanContainer beanContainer = (BeanContainer) userTable.getContainerDataSource();
    BeanItem item = beanContainer.getItem(user.getId());
    if (item != null) {
        log.info("updating user");

        UI ui = userTable.getUI();//from   w  ww.java  2 s.c o  m
        if (ui != null) {
            VaadinSession session = ui.getSession();
            if (session != null) {
                session.getLockInstance().lock();
                try {
                    item.getItemProperty("firstname").setValue(user.getFirstname());
                    item.getItemProperty("lastname").setValue(user.getLastname());
                } finally {
                    session.getLockInstance().unlock();
                }
            }
        }
    }
    if (userTable.isSelected(user.getId())) {
        refreshUserValues(user);
        populatePolicyExceptionList();
    }
}

---

From source file:com.garyclayburg.vconsole.VConsole.java

License:Open Source License

private void populateItems(User firstUser,
        BeanContainer<String, GeneratedAttributesBean> generatedAttributesBeanContainer) {
    //        if (firstUser !=null) {
    List<GeneratedAttributesBean> generatedAttributes = attributeService.getGeneratedAttributesBean(firstUser);

    UI ui = attributeTable.getUI();// ww  w . j  av  a 2  s.c o m
    if (ui != null) {
        VaadinSession session = ui.getSession();
        if (session != null) {
            session.getLockInstance().lock();
            try {
                generatedAttributesBeanContainer.removeAllItems();
                for (GeneratedAttributesBean generatedAttribute : generatedAttributes) {
                    generatedAttributesBeanContainer.addBean(generatedAttribute);
                }
            } finally {
                session.getLockInstance().unlock();
            }
        }
    }
    //        }
}

---

From source file:org.lucidj.vaadinui.SmartPush.java

License:Apache License

private synchronized void timer_poll() {
    if (!ui.isAttached()) {
        // We never update a detached UI
        return;//from w w  w .j  ava  2 s  . c  o m
    }

    if (ui.isClosing()) {
        // UI.close() issues a final push(), so we can stop right now
        stop();
        return;
    }

    if (!ui.getConnectorTracker().hasDirtyConnectors()) {
        // Nothing to send, reset and keep waiting
        prepare_push = 0;
    } else {
        long now = System.currentTimeMillis();

        // We have data to sync
        if (prepare_push == 0) {
            // Start the timer to prepare push
            prepare_push = now;
        } else if (now - prepare_push > (PUSH_INTERVAL - CHECK_INTERVAL - 1)) {
            VaadinSession session = ui.getSession();
            Lock lock = session.getLockInstance();

            try {
                lock.lock();
                ui.push();
            } finally {
                prepare_push = 0;
                lock.unlock();
            }
        }
    }
}

---

From source file:org.ripla.web.internal.services.ControllerManager.java

License:Open Source License

@SuppressWarnings("unchecked")
private void setActiveMenuItem(final String inBundleName) {
    final VaadinSession lCurrentSession = VaadinSession.getCurrent();
    MenuItem lOldItem = null;/*from  ww w. ja v  a2  s. c  o  m*/
    try {
        lCurrentSession.getLockInstance().lock();
        lOldItem = (MenuItem) lCurrentSession.getAttribute(Constants.SA_ACTIVE_MENU);
    } finally {
        lCurrentSession.getLockInstance().unlock();
    }

    if (lOldItem != null) {
        lOldItem.setStyleName("");
    }
    Map<String, MenuItem> lMenuMap = null;
    try {
        lCurrentSession.getLockInstance().lock();
        lMenuMap = (Map<String, MenuItem>) lCurrentSession.getAttribute(Constants.SA_MENU_MAP);
    } finally {
        lCurrentSession.getLockInstance().unlock();
    }
    final MenuItem lNewItem = lMenuMap == null ? null : lMenuMap.get(inBundleName);
    if (lNewItem != null) {
        lNewItem.setStyleName(Constants.CSS_ACTIVE_MENU);
    }
    try {
        lCurrentSession.getLockInstance().lock();
        lCurrentSession.setAttribute(Constants.SA_ACTIVE_MENU, lNewItem);
    } finally {
        lCurrentSession.getLockInstance().unlock();
    }
}

---