1 /* 2 * Copyright (c) 2017, 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 /* @test 25 * @bug 8164900 26 * @summary Test read method of FileChannel with DirectIO 27 */ 28 29 import java.io.*; 30 import java.nio.ByteBuffer; 31 import java.nio.CharBuffer; 32 import java.nio.channels.*; 33 import java.nio.channels.FileChannel; 34 import java.nio.file.Paths; 35 import java.nio.file.Path; 36 import java.nio.file.Files; 37 import java.nio.file.FileStore; 38 import com.sun.nio.file.ExtendedOpenOption; 39 40 public class ReadDirect { 41 42 private static PrintStream err = System.err; 43 44 private static void testRead1() throws Exception { 45 StringBuffer sb = new StringBuffer(); 46 sb.setLength(2); 47 48 int charsPerGroup = 4096; 49 Path p = Files.createTempFile(Paths.get( 50 System.getProperty("test.dir", ".")), "test", null); 51 initTestFile(p, charsPerGroup); 52 FileChannel c = FileChannel.open(p, ExtendedOpenOption.DIRECT); 53 FileStore fs = Files.getFileStore(p); 54 int alignment = (int)fs.getBlockSize(); 55 56 for (int x=0; x<100; x++) { 57 long offset = x * charsPerGroup; 58 long expectedResult = offset / charsPerGroup; 59 ByteBuffer block = ByteBuffer.allocateDirect(charsPerGroup 60 + alignment - 1).alignedSlice(alignment); 61 c.read(block); 62 63 for (int i=0; i<2; i++) { 64 byte aByte = block.get(i); 65 sb.setCharAt(i, (char)aByte); 66 } 67 int result = Integer.parseInt(sb.toString()); 68 if (result != expectedResult) { 69 err.println("I expected "+expectedResult); 70 err.println("I got "+ result); 71 throw new Exception("Read test failed"); 72 } 73 } 74 c.close(); 75 Files.delete(p); 76 } 77 78 private static void testRead2() throws Exception { 79 int charsPerGroup = 4000; 80 Path p = Files.createTempFile(Paths.get( 81 System.getProperty("test.dir", ".")), "test", null); 82 OutputStream fos = Files.newOutputStream(p); 83 fos.write(new byte[charsPerGroup]); 84 fos.close(); 85 86 FileChannel c = FileChannel.open(p, ExtendedOpenOption.DIRECT); 87 FileStore fs = Files.getFileStore(p); 88 int alignment = (int)fs.getBlockSize(); 89 90 ByteBuffer block = ByteBuffer.allocate(charsPerGroup); 91 try { 92 c.read(block); 93 throw new RuntimeException("Expected exception not thrown"); 94 } catch (IOException e) { 95 if (!e.getMessage().contains("Number of remaining bytes is " 96 + "not a multiple of the block size")) 97 throw new Exception("Read test failed"); 98 } finally { 99 c.close(); 100 Files.delete(p); 101 } 102 } 103 104 105 public static void main(String[] args) throws Exception { 106 testRead1(); 107 testRead2(); 108 } 109 110 private static void initTestFile(Path p, int charsPerGroup) 111 throws Exception { 112 OutputStream fos = Files.newOutputStream(p); 113 BufferedWriter awriter 114 = new BufferedWriter(new OutputStreamWriter(fos, "8859_1")); 115 116 for(int i=0; i<100; i++) { 117 String number = new Integer(i).toString(); 118 for (int h=0; h<2-number.length(); h++) 119 awriter.write("0"); 120 awriter.write(""+i); 121 for (int j=0; j < (charsPerGroup - 2); j++) 122 awriter.write("0"); 123 } 124 awriter.flush(); 125 awriter.close(); 126 } 127 }