1/*
2 * Copyright (c) 2007, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 */
23
24/**
25 * @test
26 * @bug     6547241
27 * @summary Test verifies that concurrent usage of jpeg writer instance
28 *          by number of threads does not cause crash in jpeg library.
29 * @run     main ConcurrentWritingTest
30 */
31
32import java.awt.Color;
33import java.awt.Graphics2D;
34import java.awt.RadialGradientPaint;
35import java.awt.geom.Point2D;
36import java.awt.image.BufferedImage;
37import java.io.File;
38import java.io.IOException;
39import javax.imageio.ImageIO;
40import javax.imageio.ImageWriter;
41import javax.imageio.stream.ImageOutputStream;
42
43public class ConcurrentWritingTest extends Thread {
44
45    static ImageWriter w = null;
46    static File pwd = new File(".");
47    static BufferedImage img;
48
49    private static int MAX_THREADS = 50;
50    private static int completeCount = 0;
51    private static Object lock = new Object();
52
53    public static void main(String[] args) throws Exception {
54        img = createTestImage();
55
56        w = ImageIO.getImageWritersByFormatName("JPEG").next();
57
58        for (int i = 0; i < MAX_THREADS; i++) {
59            (new ConcurrentWritingTest()).start();
60        }
61
62        // wait for threads
63        boolean needWait = true;
64        while(needWait) {
65            synchronized(lock) {
66                needWait = completeCount < MAX_THREADS;
67            }
68        }
69        System.out.println("Test PASSED");
70    }
71
72    public void run() {
73        try {
74            File f = File.createTempFile("writer_", ".jpg", pwd);
75            ImageOutputStream ios = ImageIO.createImageOutputStream(f);
76            w.setOutput(ios);
77            Thread.sleep(70);
78            w.write(img);
79            Thread.sleep(70);
80            w.reset();
81        } catch (IllegalStateException e) {
82            System.out.println(e);
83        } catch (IOException e) {
84            System.out.println(e);
85        } catch (Throwable e) {
86            // Unexpected exception. Test failed.
87            throw new RuntimeException("Test failed.", e);
88        } finally {
89            synchronized(lock) {
90                completeCount ++;
91            }
92        }
93    }
94
95    private static BufferedImage createTestImage() {
96        int w = 1024;
97        int h = 768;
98
99        BufferedImage img = new
100            BufferedImage(w, h, BufferedImage.TYPE_INT_RGB);
101        Graphics2D g = img.createGraphics();
102        Color[] colors = { Color.red, Color.green, Color.blue };
103        float[] dist = {0.0f, 0.5f, 1.0f };
104        Point2D center = new Point2D.Float(0.5f * w, 0.5f * h);
105
106        RadialGradientPaint p =
107            new RadialGradientPaint(center, 0.5f * w, dist, colors);
108        g.setPaint(p);
109        g.fillRect(0, 0, w, h);
110        g.dispose();
111
112        return img;
113    }
114}
115