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 }