1 /*
   2  * Copyright (c) 2013, 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     8020983 8024697
  27  * @summary Test verifies that jpeg writer instances are collected
  28  *          even if destroy() or reset() methods is not invoked.
  29  *
  30  * @run main JpegWriterLeakTest
  31  * @key randomness
  32  */
  33 
  34 import java.awt.Color;
  35 import java.awt.Graphics2D;
  36 import java.awt.image.BufferedImage;
  37 import java.io.ByteArrayOutputStream;
  38 import java.io.IOException;
  39 import java.lang.ref.Reference;
  40 import java.lang.ref.ReferenceQueue;
  41 import java.lang.ref.WeakReference;
  42 import java.util.ArrayList;
  43 import java.util.Random;
  44 import javax.imageio.ImageIO;
  45 import javax.imageio.ImageWriter;
  46 import javax.imageio.stream.ImageOutputStream;
  47 
  48 public class JpegWriterLeakTest {
  49 
  50     public static void main(String[] args) {
  51         final ReferenceQueue<ImageWriter> queue = new ReferenceQueue<>();
  52         final ArrayList<Reference<? extends ImageWriter>> refs = new ArrayList<>();
  53 
  54         int count = 2;
  55 
  56         do {
  57             ImageWriter writer =
  58                     ImageIO.getImageWritersByFormatName("jpeg").next();
  59 
  60             final WeakReference<? extends ImageWriter> ref =
  61                     new WeakReference<>(writer, queue);
  62 
  63             refs.add(ref);
  64 
  65 
  66             try {
  67                 final ImageOutputStream os =
  68                         ImageIO.createImageOutputStream(new ByteArrayOutputStream());
  69                 writer.setOutput(os);
  70 
  71                 writer.write(getImage());
  72 
  73 
  74                 // NB: dispose() or reset() workarounds the problem.
  75             } catch (IOException e) {
  76             } finally {
  77                 writer = null;
  78             }
  79             count--;
  80         } while (count > 0);
  81 
  82 
  83         System.out.println("Wait for GC...");
  84 
  85         final long testTimeOut = 60000L;
  86 
  87         final long startTime = System.currentTimeMillis();
  88 
  89         while (!refs.isEmpty()) {
  90             // check for the test timeout
  91             final long now = System.currentTimeMillis();
  92 
  93             if (now - startTime > testTimeOut) {
  94                 System.out.println();
  95                 throw new RuntimeException("Test FAILED.");
  96             }
  97 
  98             System.gc();
  99 
 100             try {
 101                 System.out.print(".");
 102                 Thread.sleep(1000);
 103             } catch (InterruptedException e) {
 104             };
 105 
 106             Reference<? extends ImageWriter> r = queue.poll();
 107             if (r != null) {
 108                 System.out.println("Got reference: " + r);
 109                 refs.remove(r);
 110             }
 111         }
 112         System.out.println("Test PASSED.");
 113     }
 114 
 115     private static BufferedImage getImage() {
 116         int width = 2500;
 117         int height = new Random().nextInt(2500) + 1;
 118         BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
 119 
 120         Graphics2D g = image.createGraphics();
 121         g.setColor(Color.blue);
 122         g.fillRect(0, 0, width, height);
 123 
 124         return image;
 125     }
 126 }