| /* |
| * Copyright (c) 2006, 2008, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| /* @test |
| * @bug 6285901 6501089 |
| * @summary Check no data is written to wrong socket channel during async closing. |
| * @author Xueming Shen |
| */ |
| |
| import java.io.*; |
| import java.nio.*; |
| import java.nio.channels.*; |
| import java.net.*; |
| |
| public class AsyncCloseChannel { |
| static volatile boolean failed = false; |
| static volatile boolean keepGoing = true; |
| static int maxAcceptCount = 100; |
| static volatile int acceptCount = 0; |
| static String host = "127.0.0.1"; |
| static int sensorPort; |
| static int targetPort; |
| |
| public static void main(String args[]) throws Exception { |
| if (System.getProperty("os.name").startsWith("Windows")) { |
| System.err.println("WARNING: Still does not work on Windows!"); |
| return; |
| } |
| Thread ss = new SensorServer(); ss.start(); |
| Thread ts = new TargetServer(); ts.start(); |
| |
| sensorPort = ((ServerThread)ss).server.getLocalPort(); |
| targetPort = ((ServerThread)ts).server.getLocalPort(); |
| |
| Thread sc = new SensorClient(); sc.start(); |
| Thread tc = new TargetClient(); tc.start(); |
| |
| while(acceptCount < maxAcceptCount && !failed) { |
| Thread.sleep(10); |
| } |
| keepGoing = false; |
| try { |
| ss.interrupt(); |
| ts.interrupt(); |
| sc.interrupt(); |
| tc.interrupt(); |
| } catch (Exception e) {} |
| if (failed) |
| throw new RuntimeException("AsyncCloseChannel2 failed after <" |
| + acceptCount + "> times of accept!"); |
| } |
| |
| static class SensorServer extends ServerThread { |
| public void runEx() throws Exception { |
| while(keepGoing) { |
| try { |
| final Socket s = server.accept(); |
| new Thread() { |
| public void run() { |
| try { |
| int c = s.getInputStream().read(); |
| if(c != -1) { |
| // No data is ever written to the peer's socket! |
| System.err.println("Oops: read a character: " |
| + (char) c); |
| failed = true; |
| } |
| } catch (IOException ex) { |
| ex.printStackTrace(); |
| } finally { |
| closeIt(s); |
| } |
| } |
| }.start(); |
| } catch (IOException ex) { |
| System.err.println("Exception on sensor server " + ex.getMessage()); |
| } |
| } |
| } |
| } |
| |
| static class TargetServer extends ServerThread { |
| public void runEx() throws Exception { |
| while (keepGoing) { |
| try { |
| final Socket s = server.accept(); |
| acceptCount++; |
| new Thread() { |
| public void run() { |
| boolean empty = true; |
| try { |
| for(;;) { |
| int c = s.getInputStream().read(); |
| if(c == -1) { |
| if(!empty) |
| break; |
| } |
| empty = false; |
| } |
| } catch (IOException ex) { |
| ex.printStackTrace(); |
| } finally { |
| closeIt(s); |
| } |
| } |
| }.start(); |
| } catch (IOException ex) { |
| System.err.println("Exception on target server " + ex.getMessage()); |
| } |
| } |
| } |
| } |
| |
| static class SensorClient extends Thread { |
| private static boolean wake; |
| private static SensorClient theClient; |
| public void run() { |
| while (keepGoing) { |
| Socket s = null; |
| try { |
| s = new Socket(); |
| synchronized(this) { |
| while(!wake && keepGoing) { |
| try { |
| wait(); |
| } catch (InterruptedException ex) { } |
| } |
| wake = false; |
| } |
| s.connect(new InetSocketAddress(host, sensorPort)); |
| try { |
| Thread.sleep(10); |
| } catch (InterruptedException ex) { } |
| } catch (IOException ex) { |
| System.err.println("Exception on sensor client " + ex.getMessage()); |
| } finally { |
| if(s != null) { |
| try { |
| s.close(); |
| } catch(IOException ex) { ex.printStackTrace();} |
| } |
| } |
| } |
| } |
| |
| public SensorClient() { |
| theClient = this; |
| } |
| |
| public static void wakeMe() { |
| synchronized(theClient) { |
| wake = true; |
| theClient.notify(); |
| } |
| } |
| } |
| |
| static class TargetClient extends Thread { |
| volatile boolean ready = false; |
| public void run() { |
| while(keepGoing) { |
| try { |
| final SocketChannel s = SocketChannel.open( |
| new InetSocketAddress(host, targetPort)); |
| s.finishConnect(); |
| s.socket().setSoLinger(false, 0); |
| ready = false; |
| Thread t = new Thread() { |
| public void run() { |
| ByteBuffer b = ByteBuffer.allocate(1); |
| try { |
| for(;;) { |
| b.clear(); |
| b.put((byte) 'A'); |
| b.flip(); |
| s.write(b); |
| ready = true; |
| } |
| } catch (IOException ex) { |
| if(!(ex instanceof ClosedChannelException)) |
| System.err.println("Exception in target client child " |
| + ex.toString()); |
| } |
| } |
| }; |
| t.start(); |
| while(!ready && keepGoing) { |
| try { |
| Thread.sleep(10); |
| } catch (InterruptedException ex) {} |
| } |
| s.close(); |
| SensorClient.wakeMe(); |
| t.join(); |
| } catch (IOException ex) { |
| System.err.println("Exception in target client parent " |
| + ex.getMessage()); |
| } catch (InterruptedException ex) {} |
| } |
| } |
| } |
| |
| static abstract class ServerThread extends Thread { |
| ServerSocket server; |
| public ServerThread() { |
| super(); |
| try { |
| server = new ServerSocket(0); |
| } catch (IOException ex) { |
| ex.printStackTrace(); |
| } |
| } |
| |
| public void interrupt() { |
| super.interrupt(); |
| if (server != null) { |
| try { |
| server.close(); |
| } catch (IOException ex) { |
| ex.printStackTrace(); |
| } |
| } |
| } |
| public void run() { |
| try { |
| runEx(); |
| } catch (Exception ex) { |
| ex.printStackTrace(); |
| } |
| } |
| |
| abstract void runEx() throws Exception; |
| } |
| |
| public static void closeIt(Socket s) { |
| try { |
| if(s != null) |
| s.close(); |
| } catch (IOException ex) { } |
| } |
| } |