1 /*
2  * Copyright (c) 2005, 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 6266377
27  * @summary Test to ensure that BufferedWriter releases
28  *      resources if flushing the buffer results in an
29  *      exception during a call to close().
30  */
31 
32 import java.io.*;
33 
34 public class Cleanup extends Thread {
35 
36     static PipedWriter w;
37     static PipedReader r;
38     static boolean isWriterClosed = false;
39 
run()40     public void run() {
41         try {
42             System.out.println("Reader reading...");
43             r.read(new char[2048], 0, 2048);
44 
45             // Close abruptly before reading all the bytes
46             System.out.println("Reader closing stream...");
47             r.close();
48 
49             Thread.sleep(3000);
50         } catch (Throwable e) {
51             System.out.println("Reader exception:");
52             e.printStackTrace();
53         }
54     }
55 
main(String args[])56     public static void main(String args[]) throws Exception {
57         r = new PipedReader();
58         w = new PipedWriter(r);
59 
60         Cleanup reader  = new Cleanup();
61         reader.start();
62 
63         BufferedWriter bw = new BufferedWriter(w);
64 
65         boolean isWriterClosed = false;
66 
67         try {
68             System.out.println("Writer started.");
69 
70             for (int i = 0; i < 3; i++) {
71               bw.write(new char[1024], 0, (1024));
72             }
73 
74             // This call to close() will raise an exception during
75             // flush() since the reader is already closed
76             bw.close();
77 
78         } catch (Throwable e) {
79             try {
80                 e.printStackTrace();
81 
82                 // Make sure that the BufferedWriter releases the resources
83                 // A write to a properly closed Writer should raise an exception
84                 bw.write('a');
85 
86             } catch (IOException ex) {
87                 ex.printStackTrace();
88                 isWriterClosed = true;
89             }
90         } finally {
91             System.out.println("Writer done.");
92             reader.join();
93             if (!isWriterClosed) {
94                 throw new Exception("BufferedWriter is not closed properly");
95             }
96         }
97     }
98 }
99