1 /* 2 * Copyright (c) 2001, 2010, 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 4475533 4698138 4638365 4796221 27 * @summary Test FileChannel write 28 * @run main/othervm Write 29 */ 30 31 import java.nio.channels.*; 32 import java.nio.*; 33 import java.io.*; 34 35 public class Write { 36 37 public static void main(String[] args) throws Exception { 38 test1(); // for bug 4475533 39 test2(); 40 test3(); // for bug 4698138 41 42 // This test is not suitable for automated testing at this time. 43 // I am commenting it out but it will be easy to manually 44 // test for a regression in this area. See also 4796221. 45 //test4(); // for bug 4638365 46 } 47 48 // Test to see that offset > length does not throw exception 49 static void test1() throws Exception { 50 ByteBuffer[] dsts = new ByteBuffer[4]; 51 for (int i=0; i<4; i++) 52 dsts[i] = ByteBuffer.allocateDirect(10); 53 54 File testFile = File.createTempFile("test1", null); 55 try { 56 FileOutputStream fos = new FileOutputStream(testFile); 57 FileChannel fc = fos.getChannel(); 58 fc.write(dsts, 2, 1); 59 fos.close(); 60 } finally { 61 testFile.delete(); 62 } 63 } 64 65 // Test to see that the appropriate buffers are updated 66 static void test2() throws Exception { 67 File testFile = File.createTempFile("test2", null); 68 testFile.delete(); 69 ByteBuffer[] srcs = new ByteBuffer[4]; 70 for (int i=0; i<4; i++) 71 srcs[i] = ByteBuffer.allocateDirect(10); 72 73 srcs[0].put((byte)1); srcs[0].flip(); 74 srcs[1].put((byte)2); srcs[1].flip(); 75 srcs[2].put((byte)3); srcs[2].flip(); 76 srcs[3].put((byte)4); srcs[3].flip(); 77 78 FileOutputStream fos = new FileOutputStream(testFile); 79 FileChannel fc = fos.getChannel(); 80 try { 81 fc.write(srcs, 1, 2); 82 } finally { 83 fc.close(); 84 } 85 86 FileInputStream fis = new FileInputStream(testFile); 87 fc = fis.getChannel(); 88 try { 89 ByteBuffer bb = ByteBuffer.allocateDirect(10); 90 fc.read(bb); 91 bb.flip(); 92 if (bb.get() != 2) 93 throw new RuntimeException("Write failure"); 94 if (bb.get() != 3) 95 throw new RuntimeException("Write failure"); 96 try { 97 bb.get(); 98 throw new RuntimeException("Write failure"); 99 } catch (BufferUnderflowException bufe) { 100 // correct result 101 } 102 } finally { 103 fc.close(); 104 } 105 106 // eagerly clean-up 107 testFile.delete(); 108 } 109 110 // Test write to a negative position (bug 4698138). 111 static void test3() throws Exception { 112 File testFile = File.createTempFile("test1", null); 113 testFile.deleteOnExit(); 114 ByteBuffer dst = ByteBuffer.allocate(10); 115 FileOutputStream fos = new FileOutputStream(testFile); 116 FileChannel fc = fos.getChannel(); 117 try { 118 fc.write(dst, -1); 119 throw new RuntimeException("Expected IAE not thrown"); 120 } catch (IllegalArgumentException iae) { 121 // Correct result 122 } finally { 123 fos.close(); 124 } 125 } 126 127 private static final int TEST4_NUM_BUFFERS = 3; 128 129 private static final int TEST4_BUF_CAP = Integer.MAX_VALUE / 2; 130 131 /** 132 * Test to see that vector write can return > Integer.MAX_VALUE 133 * 134 * Note that under certain circumstances disk space problems occur 135 * with this test. It typically relies upon adequate disk space and/or 136 * a Solaris disk space optimization where empty files take up less 137 * space than their logical size. 138 * 139 * Note that if this test fails it is not necessarily a violation of 140 * spec: the value returned by fc.write can be smaller than the number 141 * of bytes requested to write. It is testing an optimization that allows 142 * for larger return values. 143 */ 144 static void test4() throws Exception { 145 // Only works on 64 bit Solaris 146 String osName = System.getProperty("os.name"); 147 if (!osName.startsWith("SunOS")) 148 return; 149 String dataModel = System.getProperty("sun.arch.data.model"); 150 if (!dataModel.startsWith("64")) 151 return; 152 153 File testFile = File.createTempFile("test4", null); 154 testFile.deleteOnExit(); 155 156 FileChannel[] fcs = new FileChannel[TEST4_NUM_BUFFERS]; 157 158 ByteBuffer[] dsts = new ByteBuffer[TEST4_NUM_BUFFERS]; 159 // Map these buffers from a file so we don't run out of memory 160 for (int i=0; i<TEST4_NUM_BUFFERS; i++) { 161 File f = File.createTempFile("test4." + i, null); 162 f.deleteOnExit(); 163 prepTest4File(f); 164 FileInputStream fis = new FileInputStream(f); 165 FileChannel fc = fis.getChannel(); 166 MappedByteBuffer mbb = fc.map(FileChannel.MapMode.READ_ONLY, 0, 167 TEST4_BUF_CAP); 168 dsts[i] = mbb; 169 } 170 171 FileOutputStream fos = new FileOutputStream(testFile); 172 FileChannel fc = fos.getChannel(); 173 try { 174 long bytesWritten = fc.write(dsts); 175 if (bytesWritten < Integer.MAX_VALUE) { 176 // Note: this is not a violation of the spec 177 throw new RuntimeException("Test 4 failed but wrote " + 178 bytesWritten); 179 } 180 } finally { 181 fc.close(); 182 fos.close(); 183 } 184 } 185 186 static void prepTest4File(File blah) throws Exception { 187 RandomAccessFile raf = new RandomAccessFile(blah, "rw"); 188 FileChannel fc = raf.getChannel(); 189 fc.write(ByteBuffer.wrap("Use the source!".getBytes()), 190 TEST4_BUF_CAP); 191 fc.close(); 192 raf.close(); 193 } 194 195 }