| /* |
| * Copyright (c) 2011, 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. |
| */ |
| |
| /* |
| * Portions Copyright (c) 2011 IBM Corporation |
| */ |
| |
| /* |
| * @test |
| * @bug 7031076 |
| * @summary Allow stale InputStreams from ZipFiles to be GC'd |
| * @author Neil Richards <neil.richards@ngmr.net>, <neil_richards@uk.ibm.com> |
| * @key randomness |
| */ |
| import java.lang.ref.ReferenceQueue; |
| import java.lang.ref.WeakReference; |
| import java.io.File; |
| import java.io.FileOutputStream; |
| import java.io.InputStream; |
| import java.util.Enumeration; |
| import java.util.HashSet; |
| import java.util.Random; |
| import java.util.Set; |
| import java.util.zip.ZipEntry; |
| import java.util.zip.ZipFile; |
| import java.util.zip.ZipOutputStream; |
| |
| public class ClearStaleZipFileInputStreams { |
| private static final int ZIP_ENTRY_NUM = 5; |
| |
| private static final byte[][] data; |
| |
| static { |
| data = new byte[ZIP_ENTRY_NUM][]; |
| Random r = new Random(); |
| for (int i = 0; i < ZIP_ENTRY_NUM; i++) { |
| data[i] = new byte[1000]; |
| r.nextBytes(data[i]); |
| } |
| } |
| |
| private static File createTestFile(int compression) throws Exception { |
| File tempZipFile = |
| File.createTempFile("test-data" + compression, ".zip"); |
| tempZipFile.deleteOnExit(); |
| |
| try (FileOutputStream fos = new FileOutputStream(tempZipFile); |
| ZipOutputStream zos = new ZipOutputStream(fos)) { |
| zos.setLevel(compression); |
| for (int i = 0; i < ZIP_ENTRY_NUM; i++) { |
| String text = "Entry" + i; |
| ZipEntry entry = new ZipEntry(text); |
| zos.putNextEntry(entry); |
| try { |
| zos.write(data[i], 0, data[i].length); |
| } finally { |
| zos.closeEntry(); |
| } |
| } |
| } |
| |
| return tempZipFile; |
| } |
| |
| private static final class GcInducingThread extends Thread { |
| private final int sleepMillis; |
| private boolean keepRunning = true; |
| |
| public GcInducingThread(final int sleepMillis) { |
| this.sleepMillis = sleepMillis; |
| } |
| |
| public synchronized void run() { |
| while (keepRunning) { |
| System.gc(); |
| try { |
| wait(sleepMillis); |
| } catch (InterruptedException e) { |
| System.out.println("GCing thread unexpectedly interrupted"); |
| return; |
| } |
| } |
| } |
| |
| public synchronized void shutDown() { |
| keepRunning = false; |
| notifyAll(); |
| } |
| } |
| |
| public static void main(String[] args) throws Exception { |
| GcInducingThread gcThread = new GcInducingThread(500); |
| gcThread.start(); |
| try { |
| runTest(ZipOutputStream.DEFLATED); |
| runTest(ZipOutputStream.STORED); |
| } finally { |
| gcThread.shutDown(); |
| gcThread.join(); |
| } |
| } |
| |
| private static void runTest(int compression) throws Exception { |
| ReferenceQueue<InputStream> rq = new ReferenceQueue<>(); |
| |
| System.out.println("Testing with a zip file with compression level = " |
| + compression); |
| File f = createTestFile(compression); |
| try (ZipFile zf = new ZipFile(f)) { |
| Set<Object> refSet = createTransientInputStreams(zf, rq); |
| |
| System.out.println("Waiting for 'stale' input streams from ZipFile to be GC'd ..."); |
| System.out.println("(The test will hang on failure)"); |
| while (false == refSet.isEmpty()) { |
| refSet.remove(rq.remove()); |
| } |
| System.out.println("Test PASSED."); |
| System.out.println(); |
| } finally { |
| f.delete(); |
| } |
| } |
| |
| private static Set<Object> createTransientInputStreams(ZipFile zf, |
| ReferenceQueue<InputStream> rq) throws Exception { |
| Enumeration<? extends ZipEntry> zfe = zf.entries(); |
| Set<Object> refSet = new HashSet<>(); |
| |
| while (zfe.hasMoreElements()) { |
| InputStream is = zf.getInputStream(zfe.nextElement()); |
| refSet.add(new WeakReference<InputStream>(is, rq)); |
| } |
| |
| return refSet; |
| } |
| } |