test/jdk/java/awt/EventDispatchThread/LoopRobustness/LoopRobustness.java
author prr
Wed, 29 Nov 2017 09:47:02 -0800 (2017-11-29)
changeset 47982 44371ff1ee9a
parent 47216 71c04702a3d5
child 54231 e4813eded7cb
permissions -rw-r--r--
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/*
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 * Copyright (c) 1998, 2013, Oracle and/or its affiliates. All rights reserved.
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 *
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 * This code is free software; you can redistribute it and/or modify it
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 * under the terms of the GNU General Public License version 2 only, as
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 * published by the Free Software Foundation.
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 *
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 * This code is distributed in the hope that it will be useful, but WITHOUT
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 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
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 * version 2 for more details (a copy is included in the LICENSE file that
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 * accompanied this code).
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 *
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 * You should have received a copy of the GNU General Public License version
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 * 2 along with this work; if not, write to the Free Software Foundation,
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 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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 *
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 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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 * or visit www.oracle.com if you need additional information or have any
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 * questions.
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 */
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/**
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 *
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 * @bug 4023283
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 * @key headful
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 * @summary Checks that an Error which propogates up to the EventDispatch
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 * loop does not crash AWT.
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 * @author Andrei Dmitriev: area=awt.event
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 * @library ../../regtesthelpers
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 * @build Util
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 * @run main LoopRobustness
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 */
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import java.awt.*;
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import java.awt.event.*;
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import sun.awt.SunToolkit;
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import test.java.awt.regtesthelpers.Util;
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public class LoopRobustness {
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    final static long TIMEOUT = 5000;
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    final static Object LOCK = new Object();
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    public static int clicks = 0;
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    public static volatile boolean notifyOccured = false;
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    public static volatile boolean otherExceptionsCaught = false;
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    public static void main(String [] args) throws Exception {
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        SunToolkit.createNewAppContext();
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        ThreadGroup mainThreadGroup = Thread.currentThread().getThreadGroup();
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        long at;
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        //wait for a TIMEOUT giving a chance to a new Thread above to accomplish its stuff.
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        synchronized (LoopRobustness.LOCK) {
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            new Thread(new TestThreadGroup(mainThreadGroup, "TestGroup"), new Impl()).start();
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            at = System.currentTimeMillis();
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            try {
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                while (!notifyOccured && (System.currentTimeMillis() - at < TIMEOUT)) {
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                    LoopRobustness.LOCK.wait(1000);
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                }
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            } catch (InterruptedException e) {
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                throw new RuntimeException("Test interrupted.", e);
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            }
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        }
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        if (!notifyOccured) {
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            //notify doesn't occur after a reasonable time.
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            throw new RuntimeException("Test FAILED: second thread hasn't notified MainThread");
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        }
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        //now wait for two clicks
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        at = System.currentTimeMillis();
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        while(System.currentTimeMillis() - at < TIMEOUT && clicks < 2) {
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            try {
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                Thread.sleep(100);
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            } catch(InterruptedException e) {
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                throw new RuntimeException("Test interrupted.", e);
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            }
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        }
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        if (clicks != 2) {
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            throw new RuntimeException("Test FAILED: robot should press button twice");
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        }
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        if (otherExceptionsCaught) {
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            throw new RuntimeException("Test FAILED: unexpected exceptions caught");
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        }
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    }
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}
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class Impl implements Runnable{
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    static Robot robot;
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    public void run() {
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        SunToolkit.createNewAppContext();
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        Button b = new Button("Press me to test the AWT-Event Queue thread");
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        Frame lr = new Frame("ROBUST FRAME");
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        lr.setBounds(100, 100, 300, 100);
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        b.addActionListener(new ActionListener() {
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                public void actionPerformed(ActionEvent e) {
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                    LoopRobustness.clicks++;
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                    //throwing an exception in Static Initializer
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                    System.out.println(HostileCrasher.aStaticMethod());
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                }
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            });
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        lr.add(b);
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        lr.setVisible(true);
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        try {
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            robot = new Robot();
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        } catch (AWTException e) {
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            throw new RuntimeException("Test interrupted.", e);
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        }
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        Util.waitForIdle(robot);
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        synchronized (LoopRobustness.LOCK){
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            LoopRobustness.LOCK.notify();
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            LoopRobustness.notifyOccured = true;
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        }
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        int i = 0;
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        while (i < 2) {
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            robot.mouseMove(b.getLocationOnScreen().x + b.getWidth()/2,
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                            b.getLocationOnScreen().y + b.getHeight()/2);
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            Util.waitForIdle(robot);
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            robot.mousePress(InputEvent.BUTTON1_MASK);
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            Util.waitForIdle(robot);
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            robot.mouseRelease(InputEvent.BUTTON1_MASK);
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            Util.waitForIdle(robot);
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            i++;
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        }
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    }
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}
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class TestThreadGroup extends ThreadGroup {
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    TestThreadGroup(ThreadGroup threadGroup, String name) {
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        super(threadGroup, name);
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    }
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    public void uncaughtException(Thread thread, Throwable e) {
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        System.out.println("Exception caught: " + e);
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        e.printStackTrace(System.out);
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        System.out.flush();
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        if ((e instanceof ExceptionInInitializerError) ||
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            (e instanceof NoClassDefFoundError))
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        {
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            // These two are expected
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            return;
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        }
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        LoopRobustness.otherExceptionsCaught = true;
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    }
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}
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class HostileCrasher {
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    static {
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        if (Math.random() >= 0.0) {
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            throw new RuntimeException("Die, AWT-Event Queue thread!");
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        }
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    }
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    public static String aStaticMethod() {
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        return "hello, world";
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    }
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}