J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 2006 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| 20 | * CA 95054 USA or visit www.sun.com if you need additional information or |
| 21 | * have any questions. |
| 22 | */ |
| 23 | |
| 24 | /* @test |
| 25 | * @bug 6285901 |
| 26 | * @summary Check no data is written to wrong socket channel during async closing. |
| 27 | * @author Xueming Shen |
| 28 | */ |
| 29 | |
| 30 | import java.io.*; |
| 31 | import java.nio.*; |
| 32 | import java.nio.channels.*; |
| 33 | import java.net.*; |
| 34 | |
| 35 | public class AsyncCloseChannel { |
| 36 | static boolean failed = false; |
| 37 | static boolean keepGoing = true; |
| 38 | static String host = "127.0.0.1"; |
| 39 | static int sensorPort = 3010; |
| 40 | static int targetPort = 3020; |
| 41 | static int maxAcceptCount = 1000; |
| 42 | static int acceptCount = 0; |
| 43 | |
| 44 | public static void main(String args[]) throws Exception { |
| 45 | if (System.getProperty("os.name").startsWith("Windows")) { |
| 46 | System.err.println("WARNING: Still does not work on Windows!"); |
| 47 | return; |
| 48 | } |
| 49 | Thread ss = new SensorServer(); ss.start(); |
| 50 | Thread ts = new TargetServer(); ts.start(); |
| 51 | Thread sc = new SensorClient(); sc.start(); |
| 52 | Thread tc = new TargetClient(); tc.start(); |
| 53 | |
| 54 | while(acceptCount < maxAcceptCount && !failed) { |
| 55 | Thread.yield(); |
| 56 | } |
| 57 | keepGoing = false; |
| 58 | try { |
| 59 | ss.interrupt(); |
| 60 | ts.interrupt(); |
| 61 | sc.interrupt(); |
| 62 | tc.interrupt(); |
| 63 | } catch (Exception e) {} |
| 64 | if (failed) |
| 65 | throw new RuntimeException("AsyncCloseChannel2 failed after <" |
| 66 | + acceptCount + "> times of accept!"); |
| 67 | } |
| 68 | |
| 69 | |
| 70 | static class SensorServer extends ThreadEx { |
| 71 | public void runEx() throws Exception { |
| 72 | ServerSocket server; |
| 73 | server = new ServerSocket(sensorPort); |
| 74 | while(keepGoing) { |
| 75 | try { |
| 76 | final Socket s = server.accept(); |
| 77 | new Thread() { |
| 78 | public void run() { |
| 79 | try { |
| 80 | int c = s.getInputStream().read(); |
| 81 | if(c != -1) { |
| 82 | // No data is ever written to the peer's socket! |
| 83 | System.out.println("Oops: read a character: " |
| 84 | + (char) c); |
| 85 | failed = true; |
| 86 | } |
| 87 | } catch (IOException ex) { |
| 88 | ex.printStackTrace(); |
| 89 | } finally { |
| 90 | closeIt(s); |
| 91 | } |
| 92 | } |
| 93 | }.start(); |
| 94 | } catch (IOException ex) { |
| 95 | //ex.printStackTrace(); |
| 96 | } |
| 97 | } |
| 98 | } |
| 99 | } |
| 100 | |
| 101 | static class TargetServer extends ThreadEx { |
| 102 | public void runEx() throws Exception { |
| 103 | |
| 104 | ServerSocket server; |
| 105 | server = new ServerSocket(targetPort); |
| 106 | while (keepGoing) { |
| 107 | try { |
| 108 | final Socket s = server.accept(); |
| 109 | acceptCount++; |
| 110 | new Thread() { |
| 111 | public void run() { |
| 112 | boolean empty = true; |
| 113 | try { |
| 114 | for(;;) { |
| 115 | int c = s.getInputStream().read(); |
| 116 | if(c == -1) { |
| 117 | if(!empty) |
| 118 | break; |
| 119 | } |
| 120 | empty = false; |
| 121 | } |
| 122 | } catch (IOException ex) { |
| 123 | ex.printStackTrace(); |
| 124 | } finally { |
| 125 | closeIt(s); |
| 126 | } |
| 127 | } |
| 128 | }.start(); |
| 129 | } catch (IOException ex) { |
| 130 | //ex.printStackTrace(); |
| 131 | } |
| 132 | } |
| 133 | } |
| 134 | } |
| 135 | |
| 136 | static class SensorClient extends Thread { |
| 137 | private static boolean wake; |
| 138 | private static SensorClient theClient; |
| 139 | public void run() { |
| 140 | while (keepGoing) { |
| 141 | Socket s = null; |
| 142 | try { |
| 143 | s = new Socket(); |
| 144 | synchronized(this) { |
| 145 | while(!wake) { |
| 146 | try { |
| 147 | wait(); |
| 148 | } catch (InterruptedException ex) { } |
| 149 | } |
| 150 | } |
| 151 | wake = false; |
| 152 | s.connect(new InetSocketAddress(host, sensorPort)); |
| 153 | try { |
| 154 | Thread.sleep(10); |
| 155 | } catch (InterruptedException ex) { } |
| 156 | } catch (IOException ex) { |
| 157 | System.out.println("Exception on sensor client " + ex.getMessage()); |
| 158 | } finally { |
| 159 | if(s != null) { |
| 160 | try { |
| 161 | s.close(); |
| 162 | } catch(IOException ex) { ex.printStackTrace();} |
| 163 | } |
| 164 | } |
| 165 | } |
| 166 | } |
| 167 | |
| 168 | public SensorClient() { |
| 169 | theClient = this; |
| 170 | } |
| 171 | |
| 172 | public static void wakeMe() { |
| 173 | synchronized(theClient) { |
| 174 | wake = true; |
| 175 | theClient.notify(); |
| 176 | } |
| 177 | } |
| 178 | } |
| 179 | |
| 180 | static class TargetClient extends Thread { |
| 181 | volatile boolean ready = false; |
| 182 | public void run() { |
| 183 | while(keepGoing) { |
| 184 | try { |
| 185 | final SocketChannel s = SocketChannel.open( |
| 186 | new InetSocketAddress(host, targetPort)); |
| 187 | s.finishConnect(); |
| 188 | s.socket().setSoLinger(false, 0); |
| 189 | ready = false; |
| 190 | Thread t = new Thread() { |
| 191 | public void run() { |
| 192 | ByteBuffer b = ByteBuffer.allocate(1); |
| 193 | try { |
| 194 | for(;;) { |
| 195 | b.clear(); |
| 196 | b.put((byte) 'A'); |
| 197 | b.flip(); |
| 198 | s.write(b); |
| 199 | ready = true; |
| 200 | } |
| 201 | } catch (IOException ex) { |
| 202 | if(!(ex instanceof ClosedChannelException)) |
| 203 | System.out.println("Exception in target client child " |
| 204 | + ex.toString()); |
| 205 | } |
| 206 | } |
| 207 | }; |
| 208 | t.start(); |
| 209 | while(!ready) |
| 210 | Thread.yield(); |
| 211 | s.close(); |
| 212 | SensorClient.wakeMe(); |
| 213 | t.join(); |
| 214 | } catch (IOException ex) { |
| 215 | System.out.println("Exception in target client parent " |
| 216 | + ex.getMessage()); |
| 217 | } catch (InterruptedException ex) {} |
| 218 | } |
| 219 | } |
| 220 | } |
| 221 | |
| 222 | static abstract class ThreadEx extends Thread { |
| 223 | public void run() { |
| 224 | try { |
| 225 | runEx(); |
| 226 | } catch (Exception ex) { |
| 227 | ex.printStackTrace(); |
| 228 | } |
| 229 | } |
| 230 | |
| 231 | abstract void runEx() throws Exception; |
| 232 | } |
| 233 | |
| 234 | |
| 235 | public static void closeIt(Socket s) { |
| 236 | try { |
| 237 | if(s != null) |
| 238 | s.close(); |
| 239 | } catch (IOException ex) { } |
| 240 | } |
| 241 | } |