Example usage for com.vaadin.util CurrentInstance restoreInstances

Introduction

In this page you can find the example usage for com.vaadin.util CurrentInstance restoreInstances.

Prototype

public static void restoreInstances(Map<Class<?>, CurrentInstance> old) 

Source Link

Document

Restores the given instances to the given values.

Usage

From source file:com.peergreen.webconsole.core.vaadin7.BaseUI.java

License:Open Source License

@Override
public void accessSynchronously(Runnable runnable) {
    Map<Class<?>, CurrentInstance> old = null;

    VaadinSession session = getSession();

    if (session == null) {
        throw new UIDetachedException();
    }/* w  ww  .j a  v a2s .  c o  m*/

    // TODO PGWK-7 - hack to avoid exception when another session had lock
    //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();
        }
        old = CurrentInstance.setCurrent(this);
        runnable.run();
    } finally {
        session.unlock();
        if (old != null) {
            CurrentInstance.restoreInstances(old);
        }
    }
}

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