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Vaadin is a web application framework for Rich Internet Applications (RIA). Vaadin enables easy development and maintenance of fast and secure rich web applications with a stunning look and feel and a wide browser support. It features a server-side architecture with the majority of the logic running on the server. Ajax technology is used at the browser-side to ensure a rich and interactive user experience.

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/*
 * Copyright (C) 2000-2024 Vaadin Ltd
 *
 * This program is available under Vaadin Commercial License and Service Terms.
 *
 * See  for the full
 * license.
 */
package com.vaadin.client;

import com.google.gwt.core.client.impl.SchedulerImpl;

public class VSchedulerImpl extends SchedulerImpl {

    /**
     * Keeps track of if there are deferred commands that are being executed. 0
     * == no deferred commands currently in progress, > 0 otherwise.
     */
    private int deferredCommandTrackers = 0;

    @Override
    public void scheduleDeferred(ScheduledCommand cmd) {
        deferredCommandTrackers++;
        super.scheduleDeferred(cmd);
        super.scheduleDeferred(() -> deferredCommandTrackers--);
    }

    public boolean hasWorkQueued() {
        return deferredCommandTrackers != 0;
    }
}