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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

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 *

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 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

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 *

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 * 2 along with this work; if not, write to the Free Software Foundation,

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/*

  @test

  @bug 8043610

  @summary Tests that JComponent invalidate, revalidate and repaint methods could

           be called from any thread

  @author Petr Pchelko

*/

import sun.awt.SunToolkit;

import javax.swing.*;

import java.awt.*;

import java.util.concurrent.CountDownLatch;

import java.util.concurrent.atomic.AtomicReference;

public class bug8043610 {

    private static volatile JFrame frame;

    private static volatile JComponent component;

    public static void main(String[] args) throws Exception {

        ThreadGroup stubTG = new ThreadGroup(getRootThreadGroup(), "Stub Thread Group");

        ThreadGroup swingTG = new ThreadGroup(getRootThreadGroup(), "SwingTG");

        try {

            Thread stubThread = new Thread(stubTG, SunToolkit::createNewAppContext);

            stubThread.start();

            stubThread.join();

            CountDownLatch startSwingLatch = new CountDownLatch(1);

            new Thread(swingTG, () -> {

                SunToolkit.createNewAppContext();

                SwingUtilities.invokeLater(() -> {

                    frame = new JFrame();

                    component = new JLabel("Test Text");

                    frame.add(component);

                    frame.setBounds(100, 100, 100, 100);

                    frame.setVisible(true);

                    startSwingLatch.countDown();

                });

            }).start();

            startSwingLatch.await();

            AtomicReference<Exception> caughtException = new AtomicReference<>();

            Thread checkThread = new Thread(getRootThreadGroup(), () -> {

                try {

                    component.invalidate();

                    component.revalidate();

                    component.repaint(new Rectangle(0, 0, 0, 0));

                } catch (Exception e) {

                    caughtException.set(e);

                }

            });

            checkThread.start();

            checkThread.join();

            if (caughtException.get() != null) {

                throw new RuntimeException("Failed. Caught exception!", caughtException.get());

            }

        } finally {

            new Thread(swingTG, () -> SwingUtilities.invokeLater(() -> {

                if (frame != null) {

                    frame.dispose();

                }

            })).start();

        }

    }

    private static ThreadGroup getRootThreadGroup() {

        ThreadGroup currentTG = Thread.currentThread().getThreadGroup();

        ThreadGroup parentTG = currentTG.getParent();

        while (parentTG != null) {

            currentTG = parentTG;

            parentTG = currentTG.getParent();

        }

        return currentTG;

    }

}