| /* |
| * Copyright (c) 2007, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * 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, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| /** |
| * @test |
| * @bug 6547241 |
| * @summary Test verifies that concurrent usage of jpeg writer instance |
| * by number of threads does not cause crash in jpeg library. |
| * @run main ConcurrentWritingTest |
| */ |
| |
| import java.awt.Color; |
| import java.awt.Graphics2D; |
| import java.awt.RadialGradientPaint; |
| import java.awt.geom.Point2D; |
| import java.awt.image.BufferedImage; |
| import java.io.File; |
| import java.io.IOException; |
| import javax.imageio.ImageIO; |
| import javax.imageio.ImageWriter; |
| import javax.imageio.stream.ImageOutputStream; |
| |
| public class ConcurrentWritingTest extends Thread { |
| |
| static ImageWriter w = null; |
| static File pwd = new File("."); |
| static BufferedImage img; |
| |
| private static int MAX_THREADS = 50; |
| private static int completeCount = 0; |
| private static Object lock = new Object(); |
| |
| public static void main(String[] args) throws Exception { |
| img = createTestImage(); |
| |
| w = ImageIO.getImageWritersByFormatName("JPEG").next(); |
| |
| for (int i = 0; i < MAX_THREADS; i++) { |
| (new ConcurrentWritingTest()).start(); |
| } |
| |
| // wait for threads |
| boolean needWait = true; |
| while(needWait) { |
| synchronized(lock) { |
| needWait = completeCount < MAX_THREADS; |
| } |
| } |
| System.out.println("Test PASSED"); |
| } |
| |
| public void run() { |
| try { |
| File f = File.createTempFile("writer_", ".jpg", pwd); |
| ImageOutputStream ios = ImageIO.createImageOutputStream(f); |
| w.setOutput(ios); |
| Thread.sleep(70); |
| w.write(img); |
| Thread.sleep(70); |
| w.reset(); |
| } catch (IllegalStateException e) { |
| System.out.println(e); |
| } catch (IOException e) { |
| System.out.println(e); |
| } catch (Throwable e) { |
| // Unexpected exception. Test failed. |
| throw new RuntimeException("Test failed.", e); |
| } finally { |
| synchronized(lock) { |
| completeCount ++; |
| } |
| } |
| } |
| |
| private static BufferedImage createTestImage() { |
| int w = 1024; |
| int h = 768; |
| |
| BufferedImage img = new |
| BufferedImage(w, h, BufferedImage.TYPE_INT_RGB); |
| Graphics2D g = img.createGraphics(); |
| Color[] colors = { Color.red, Color.green, Color.blue }; |
| float[] dist = {0.0f, 0.5f, 1.0f }; |
| Point2D center = new Point2D.Float(0.5f * w, 0.5f * h); |
| |
| RadialGradientPaint p = |
| new RadialGradientPaint(center, 0.5f * w, dist, colors); |
| g.setPaint(p); |
| g.fillRect(0, 0, w, h); |
| g.dispose(); |
| |
| return img; |
| } |
| } |