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