1 /*
2 * Copyright (c) 2011, 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 import java.io.*;
25
26 /**
27 * @test
28 * @bug 7015589 8054565
29 * @summary Test that buffering streams are considered closed even when the
30 * close or flush from the underlying stream fails.
31 */
32
33 public class FailingFlushAndClose {
34
35 static int failed;
36
37 static void fail(String msg) {
38 System.err.println("FAIL: " + msg);
39 failed++;
40 }
41
42 static void failWithIOE(String msg) throws IOException {
43 fail(msg);
44 throw new IOException(msg);
45 }
46
47 static class FailingCloseInputStream extends InputStream {
48 boolean closed;
49 @Override
50 public int read()throws IOException {
51 if (closed)
52 failWithIOE("input stream is closed");
53 return 1;
54 }
55 @Override
56 public void close() throws IOException {
57 if (!closed) {
58 closed = true;
59 throw new IOException("close failed");
60 }
61 }
62 }
63
64 static class FailingCloseOutputStream extends OutputStream {
65 boolean closed;
66 @Override
67 public void write(int b) throws IOException {
68 if (closed)
69 failWithIOE("output stream is closed");
70 }
71 @Override
72 public void flush() throws IOException {
73 if (closed)
74 failWithIOE("output stream is closed");
75 }
76 @Override
77 public void close() throws IOException {
78 if (!closed) {
79 closed = true;
80 throw new IOException("close failed");
81 }
82 }
83 }
84
85 static class FailingFlushOutputStream extends OutputStream {
86 boolean closed;
87 @Override
88 public void write(int b) throws IOException {
89 if (closed)
90 failWithIOE("output stream is closed");
91 }
92 @Override
93 public void flush() throws IOException {
94 if (closed) {
95 failWithIOE("output stream is closed");
96 } else {
97 throw new IOException("flush failed");
98 }
99 }
100 @Override
101 public void close() throws IOException {
102 closed = true;
103 }
104 }
105
106 static class FailingCloseReader extends Reader {
107 boolean closed;
108 @Override
109 public int read(char[] cbuf, int off, int len) throws IOException {
110 if (closed)
111 failWithIOE("reader is closed");
112 return 1;
113 }
114 @Override
115 public void close() throws IOException {
116 if (!closed) {
117 closed = true;
118 throw new IOException("close failed");
119 }
120 }
121 }
122
123 static class FailingCloseWriter extends Writer {
124 boolean closed;
125 @Override
126 public void write(char[] cbuf, int off, int len) throws IOException {
127 if (closed)
128 failWithIOE("writer is closed");
129 }
130 @Override
131 public void flush() throws IOException {
132 if (closed)
133 failWithIOE("writer is closed");
134 }
135 @Override
136 public void close() throws IOException {
137 if (!closed) {
138 closed = true;
139 throw new IOException("close failed");
140 }
141 }
142 }
143
144 static class FailingFlushWriter extends Writer {
145 boolean closed;
146 @Override
147 public void write(char[] cbuf, int off, int len) throws IOException {
148 if (closed)
149 failWithIOE("writer is closed");
150 }
151 @Override
152 public void flush() throws IOException {
153 if (closed) {
154 failWithIOE("writer is closed");
155 } else {
156 throw new IOException("flush failed");
157 }
158 }
159 @Override
160 public void close() throws IOException {
161 if (!closed) {
162 closed = true;
163 throw new IOException("close failed");
164 }
165 }
166 }
167
168 static InputStream testFailingClose(InputStream in) throws IOException {
169 System.out.println(in.getClass());
170 in.read(new byte[100]);
171 try {
172 in.close();
173 fail("close did not fail");
174 } catch (IOException expected) { }
175 try {
176 in.read(new byte[100]);
177 fail("read did not fail");
178 } catch (IOException expected) { }
179 return in;
180 }
181
182 static OutputStream testFailingClose(OutputStream out) throws IOException {
183 System.out.println(out.getClass());
184 out.write(1);
185 try {
186 out.close();
187 fail("close did not fail");
188 } catch (IOException expected) { }
189 try {
190 out.write(1);
191 if (!(out instanceof BufferedOutputStream))
192 fail("write did not fail");
193 } catch (IOException expected) { }
194 return out;
195 }
196
197 static OutputStream testFailingFlush(OutputStream out) throws IOException {
198 System.out.println(out.getClass());
199 out.write(1);
200 try {
201 out.flush();
202 fail("flush did not fail");
203 } catch (IOException expected) { }
204 if (out instanceof BufferedOutputStream) {
205 out.write(1);
206 try {
207 out.close();
208 fail("close did not fail");
209 } catch (IOException expected) { }
210 }
211 return out;
212 }
213
214 static void closeAgain(InputStream in) throws IOException {
215 // assert the given stream should already be closed.
216 try {
217 in.close();
218 } catch (IOException expected) {
219 fail("unexpected IOException from subsequent close");
220 }
221 }
222 static void closeAgain(OutputStream out) throws IOException {
223 // assert the given stream should already be closed.
224 try {
225 out.close();
226 } catch (IOException expected) {
227 fail("unexpected IOException from subsequent close");
228 }
229 }
230
231 static Reader testFailingClose(Reader r) throws IOException {
232 System.out.println(r.getClass());
233 r.read(new char[100]);
234 try {
235 r.close();
236 fail("close did not fail");
237 } catch (IOException expected) { }
238 try {
239 r.read(new char[100]);
240 fail("read did not fail");
241 } catch (IOException expected) { }
242 return r;
243 }
244
245 static Writer testFailingClose(Writer w) throws IOException {
246 System.out.println(w.getClass());
247 w.write("message");
248 try {
249 w.close();
250 fail("close did not fail");
251 } catch (IOException expected) { }
252 try {
253 w.write("another message");
254 fail("write did not fail");
255 } catch (IOException expected) { }
256 return w;
257 }
258
259 static Writer testFailingFlush(Writer w) throws IOException {
260 System.out.println(w.getClass());
261 w.write("message");
262 try {
263 w.flush();
264 fail("flush did not fail");
265 } catch (IOException expected) { }
266 if (w instanceof BufferedWriter) {
267 // assume this message will be buffered
268 w.write("another message");
269 try {
270 w.close();
271 fail("close did not fail");
272 } catch (IOException expected) { }
273 }
274 return w;
275 }
276
277 static Reader closeAgain(Reader r) throws IOException {
278 // assert the given stream should already be closed.
279 try {
280 r.close();
281 } catch (IOException expected) {
282 fail("unexpected IOException from subsequent close");
283 }
284 return r;
285 }
286 static Writer closeAgain(Writer w) throws IOException {
287 // assert the given stream should already be closed.
288 try {
289 w.close();
290 } catch (IOException expected) {
291 fail("unexpected IOException from subsequent close");
292 }
293 return w;
294 }
295
296 public static void main(String[] args) throws IOException {
297
298 closeAgain(testFailingClose(new BufferedInputStream(new FailingCloseInputStream())));
299 closeAgain(testFailingClose(new BufferedOutputStream(new FailingCloseOutputStream())));
300
301 closeAgain(testFailingClose(new BufferedReader(new FailingCloseReader())));
302 closeAgain(testFailingClose(new BufferedWriter(new FailingCloseWriter())));
303
304 closeAgain(testFailingFlush(new BufferedOutputStream(new FailingFlushOutputStream())));
305 closeAgain(testFailingFlush(new BufferedWriter(new FailingFlushWriter())));
306
307 if (failed > 0)
308 throw new RuntimeException(failed + " test(s) failed - see log for details");
309 }
310 }