src/main/java/org/apache/sling/scripting/sightly/js/impl/loop/EventLoopInterop.java

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 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
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package org.apache.sling.scripting.sightly.js.impl.loop;

import org.mozilla.javascript.Context;

/**
 * Event-loop utilities for interoperability with JS code
 */
public class EventLoopInterop {

    public static final String EVENT_LOOP_KEY = "EventLoop";

    public static EventLoop obtainEventLoop(Context context) {
        EventLoop eventLoop = getEventLoop(context);
        if (eventLoop == null) {
            eventLoop = new EventLoop();
            context.putThreadLocal(EVENT_LOOP_KEY, eventLoop);
        }
        return eventLoop;
    }

    public static void cleanupEventLoop(Context context) {
        context.removeThreadLocal(EVENT_LOOP_KEY);
    }

    public static Task schedule(Context context, Runnable runnable) {
        Task task = new Task(runnable);
        obtainEventLoop(context).schedule(task);
        return task;
    }

    private static EventLoop getEventLoop(Context context) {
        return (EventLoop) context.getThreadLocal(EVENT_LOOP_KEY);
    }

}