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
  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  */
  32 
  33 import java.awt.Color;
  34 import java.awt.Graphics2D;
  35 import java.awt.image.BufferedImage;
  36 import java.io.ByteArrayOutputStream;
  37 import java.io.IOException;
  38 import java.lang.ref.Reference;
  39 import java.lang.ref.ReferenceQueue;
  40 import java.lang.ref.WeakReference;
  41 import java.util.ArrayList;
  42 import java.util.Random;
  43 import javax.imageio.ImageIO;
  44 import javax.imageio.ImageWriter;
  45 import javax.imageio.stream.ImageOutputStream;
  46 
  47 public class JpegWriterLeakTest {
  48 
  49     public static void main(String[] args) {
  50         final ReferenceQueue<ImageWriter> queue = new ReferenceQueue<ImageWriter>();
  51         final ArrayList<Reference<? extends ImageWriter>> refs = new ArrayList<Reference<? extends ImageWriter>>();
  52 
  53         int count = 2;
  54 
  55         do {
  56             ImageWriter writer =
  57                     ImageIO.getImageWritersByFormatName("jpeg").next();
  58 
  59             final WeakReference<? extends ImageWriter> ref =
  60                     new WeakReference<ImageWriter>(writer, queue);
  61 
  62             refs.add(ref);
  63 
  64 
  65             try {
  66                 final ImageOutputStream os =
  67                         ImageIO.createImageOutputStream(new ByteArrayOutputStream());
  68                 writer.setOutput(os);
  69 
  70                 writer.write(getImage());
  71 
  72 
  73                 // NB: dispose() or reset() workarounds the problem.
  74             } catch (IOException e) {
  75             } finally {
  76                 writer = null;
  77             }
  78             count--;
  79         } while (count > 0);
  80 
  81 
  82         System.out.println("Wait for GC...");
  83 
  84         final long testTimeOut = 60000L;
  85 
  86         final long startTime = System.currentTimeMillis();
  87 
  88         while (!refs.isEmpty()) {
  89             // check for the test timeout
  90             final long now = System.currentTimeMillis();
  91 
  92             if (now - startTime > testTimeOut) {
  93                 System.out.println();
  94                 throw new RuntimeException("Test FAILED.");
  95             }
  96 
  97             System.gc();
  98 
  99             try {
 100                 System.out.print(".");
 101                 Thread.sleep(1000);
 102             } catch (InterruptedException e) {
 103             };
 104 
 105             Reference<? extends ImageWriter> r = queue.poll();
 106             if (r != null) {
 107                 System.out.println("Got reference: " + r);
 108                 refs.remove(r);
 109             }
 110         }
 111         System.out.println("Test PASSED.");
 112     }
 113 
 114     private static BufferedImage getImage() {
 115         int width = 2500;
 116         int height = new Random().nextInt(2500) + 1;
 117         BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
 118 
 119         Graphics2D g = image.createGraphics();
 120         g.setColor(Color.blue);
 121         g.fillRect(0, 0, width, height);
 122 
 123         return image;
 124     }
 125 }