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

 *

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 * 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 6396844

 * @summary Tests memory leak for 20000 files

 * @author Sergey Malenkov

 * @library ../../regtesthelpers

 * @modules java.desktop/sun.java2d

 * @build Util

 * @run main/othervm/timeout=1000 -mx128m TwentyThousandTest

 */

import sun.java2d.Disposer;

import sun.java2d.DisposerRecord;

import javax.swing.*;

import java.awt.event.HierarchyEvent;

import java.awt.event.HierarchyListener;

import java.io.File;

import java.io.FileWriter;

public class TwentyThousandTest {

    private static final int FILES = 20000;

    private static final int ATTEMPTS = 20;

    private static final int INTERVAL = 100;

    private static String tmpDir;

    private static volatile boolean disposerComplete;

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

        tmpDir = System.getProperty("java.io.tmpdir");

        if (tmpDir.length() == 0) { //'java.io.tmpdir' isn't guaranteed to be defined

            tmpDir = System.getProperty("user.home");

        }

        System.out.println("Temp directory: " + tmpDir);

        System.out.println("Creating " + FILES + " files");

        for (int i = 0; i < FILES; i++) {

            File file = getTempFile(i);

            FileWriter writer = new FileWriter(file);

            writer.write("File " + i);

            writer.close();

        }

        for (UIManager.LookAndFeelInfo laf : UIManager.getInstalledLookAndFeels()) {

            if (laf.getClassName().contains("Motif")) {

                continue;

            }

            UIManager.setLookAndFeel(laf.getClassName());

            System.out.println("Do " + ATTEMPTS + " attempts for " + laf.getClassName());

            for (int i = 0; i < ATTEMPTS; i++) {

                System.out.print(i + " ");

                doAttempt();

            }

            System.out.println();

        }

        System.out.println("Removing " + FILES + " files");

        for (int i = 0; i < FILES; i++) {

            getTempFile(i).delete();

        }

        System.out.println("Test passed successfully");

    }

    private static File getTempFile(int i) {

        return new File(tmpDir, "temp" + i + ".txt");

    }

    private static void doAttempt() throws Exception {

        SwingUtilities.invokeAndWait(new Runnable() {

            public void run() {

                final JFileChooser chooser = new JFileChooser(tmpDir);

                chooser.updateUI();

                // Postpone JFileChooser closing until it becomes visible

                chooser.addHierarchyListener(new HierarchyListener() {

                    @Override

                    public void hierarchyChanged(HierarchyEvent e) {

                        if ((e.getChangeFlags() & HierarchyEvent.SHOWING_CHANGED) != 0) {

                            if (chooser.isShowing()) {

                                Thread thread = new Thread(new Runnable() {

                                    public void run() {

                                        try {

                                            Thread.sleep(INTERVAL);

                                            // Close JFileChooser

                                            SwingUtilities.invokeLater(new Runnable() {

                                                public void run() {

                                                    chooser.cancelSelection();

                                                }

                                            });

                                        } catch (InterruptedException e) {

                                            throw new RuntimeException(e);

                                        }

                                    }

                                });

                                thread.start();

                            }

                        }

                    }

                });

                chooser.showOpenDialog(null);

            }

        });

        DisposerRecord disposerRecord = new DisposerRecord() {

            public void dispose() {

                disposerComplete = true;

            }

        };

        disposerComplete = false;

        Disposer.addRecord(new Object(), disposerRecord);

        while (!disposerComplete) {

            Util.generateOOME();

        }

    }

}