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

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 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

 * 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

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

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

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 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

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 */

/**

 *

 * @bug 4023283

 * @summary Checks that an Error which propogate up to the EventDispatch

 * loop does not crash AWT.

 * @author Andrei Dmitriev: area=awt.event

 * @library ../../regtesthelpers

 * @build Util

 * @run main LoopRobustness

 */

import java.awt.*;

import java.awt.event.*;

import sun.awt.SunToolkit;

import test.java.awt.regtesthelpers.Util;

public class LoopRobustness {

    final static long TIMEOUT = 5000;

    final static Object LOCK = new Object();

    public static int clicks = 0;

    public static volatile boolean notifyOccured = false;

    public static volatile boolean otherExceptionsCaught = false;

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

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

        long at;

        //wait for a TIMEOUT giving a chance to a new Thread above to accomplish its stuff.

        synchronized (LoopRobustness.LOCK) {

            new Thread(new TestThreadGroup(mainThreadGroup, "TestGroup"), new Impl()).start();

            at = System.currentTimeMillis();

            try {

                while (!notifyOccured && (System.currentTimeMillis() - at < TIMEOUT)) {

                    LoopRobustness.LOCK.wait(1000);

                }

            } catch (InterruptedException e) {

                throw new RuntimeException("Test interrupted.", e);

            }

        }

        if (!notifyOccured) {

            //notify doesn't occur after a reasonable time.

            throw new RuntimeException("Test FAILED: second thread hasn't notified MainThread");

        }

        //now wait for two clicks

        at = System.currentTimeMillis();

        while(System.currentTimeMillis() - at < TIMEOUT && clicks < 2) {

            try {

                Thread.sleep(100);

            } catch(InterruptedException e) {

                throw new RuntimeException("Test interrupted.", e);

            }

        }

        if (clicks != 2) {

            throw new RuntimeException("Test FAILED: robot should press button twice");

        }

        if (otherExceptionsCaught) {

            throw new RuntimeException("Test FAILED: unexpected exceptions caught");

        }

    }

}

class Impl implements Runnable{

    static Robot robot;

    public void run() {

        SunToolkit.createNewAppContext();

        Button b = new Button("Press me to test the AWT-Event Queue thread");

        Frame lr = new Frame("ROBUST FRAME");

        lr.setBounds(100, 100, 300, 100);

        b.addActionListener(new ActionListener() {

                public void actionPerformed(ActionEvent e) {

                    LoopRobustness.clicks++;

                    //throwing an exception in Static Initializer

                    System.out.println(HostileCrasher.aStaticMethod());

                }

            });

        lr.add(b);

        lr.setVisible(true);

        try {

            robot = new Robot();

        } catch (AWTException e) {

            throw new RuntimeException("Test interrupted.", e);

        }

        Util.waitForIdle(robot);

        synchronized (LoopRobustness.LOCK){

            LoopRobustness.LOCK.notify();

            LoopRobustness.notifyOccured = true;

        }

        int i = 0;

        while (i < 2) {

            robot.mouseMove(b.getLocationOnScreen().x + b.getWidth()/2,

                            b.getLocationOnScreen().y + b.getHeight()/2);

            Util.waitForIdle(robot);

            robot.mousePress(InputEvent.BUTTON1_MASK);

            Util.waitForIdle(robot);

            robot.mouseRelease(InputEvent.BUTTON1_MASK);

            Util.waitForIdle(robot);

            i++;

        }

    }

}

class TestThreadGroup extends ThreadGroup {

    TestThreadGroup(ThreadGroup threadGroup, String name) {

        super(threadGroup, name);

    }

    public void uncaughtException(Thread thread, Throwable e) {

        System.out.println("Exception caught: " + e);

        e.printStackTrace(System.out);

        System.out.flush();

        if ((e instanceof ExceptionInInitializerError) ||

            (e instanceof NoClassDefFoundError))

        {

            // These two are expected

            return;

        }

        LoopRobustness.otherExceptionsCaught = true;

    }

}

class HostileCrasher {

    static {

        if (Math.random() >= 0.0) {

            throw new RuntimeException("Die, AWT-Event Queue thread!");

        }

    }

    public static String aStaticMethod() {

        return "hello, world";

    }

}