1 /* 2 * Copyright (c) 2006, 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 * 26 * @test 27 * @bug 6322678 28 * @summary Test for making sure that fd is closed during 29 * finalization of a stream, when an associated 30 * file channel is not available 31 */ 32 33 import java.io.*; 34 import java.nio.*; 35 import java.nio.channels.*; 36 37 public class FileChannelFDTest { 38 39 static byte data[] = new byte[] {48, 49, 50, 51, 52, 53, 54, 55, 56, 57,}; 40 static String inFileName = "fd-in-test.txt"; 41 static String outFileName = "fd-out-test.txt"; 42 static File inFile; 43 static File outFile; 44 45 private static void writeToInFile() throws IOException { 46 FileOutputStream out = new FileOutputStream(inFile); 47 out.write(data); 48 out.close(); 49 } 50 51 public static void main(String[] args) 52 throws Exception { 53 54 inFile= new File(System.getProperty("test.dir", "."), 55 inFileName); 56 inFile.createNewFile(); 57 inFile.deleteOnExit(); 58 writeToInFile(); 59 60 outFile = new File(System.getProperty("test.dir", "."), 61 outFileName); 62 outFile.createNewFile(); 63 outFile.deleteOnExit(); 64 65 doFileChannel(); 66 } 67 68 private static void doFileChannel() throws Exception { 69 70 FileInputStream fis = new FileInputStream(inFile); 71 FileDescriptor fd = fis.getFD(); 72 FileChannel fc = fis.getChannel(); 73 System.out.println("Created fis:" + fis); 74 75 /** 76 * Encourage the GC 77 */ 78 fis = null; 79 fc = null; 80 System.gc(); 81 Thread.sleep(500); 82 83 if (fd.valid()) { 84 throw new Exception("Finalizer either didn't run --" + 85 "try increasing the Thread's sleep time after System.gc();" + 86 "or the finalizer didn't close the file"); 87 } 88 89 System.out.println("File Closed successfully"); 90 System.out.println(); 91 } 92 }