1 /* 2 * Copyright (c) 2012, 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 /* @test 25 * @summary Test asynchronous close during a blocking write 26 * @key randomness 27 */ 28 29 import java.io.Closeable; 30 import java.io.IOException; 31 import java.nio.ByteBuffer; 32 import java.nio.channels.*; 33 import java.net.*; 34 import java.util.concurrent.*; 35 import java.util.Random; 36 37 public class CloseDuringWrite { 38 39 static final Random rand = new Random(); 40 41 /** 42 * A task that closes a Closeable 43 */ 44 static class Closer implements Callable<Void> { 45 final Closeable c; 46 Closer(Closeable c) { 47 this.c = c; 48 } 49 public Void call() throws IOException { 50 c.close(); 51 return null; 52 } 53 } 54 55 public static void main(String[] args) throws Exception { 56 ScheduledExecutorService pool = Executors.newSingleThreadScheduledExecutor(); 57 try { 58 try (ServerSocketChannel ssc = ServerSocketChannel.open()) { 59 ssc.bind(new InetSocketAddress(0)); 60 InetAddress lh = InetAddress.getLocalHost(); 61 int port = ssc.socket().getLocalPort(); 62 SocketAddress sa = new InetSocketAddress(lh, port); 63 64 ByteBuffer bb = ByteBuffer.allocate(2*1024*1024); 65 66 for (int i=0; i<20; i++) { 67 try (SocketChannel source = SocketChannel.open(sa); 68 SocketChannel sink = ssc.accept()) 69 { 70 // schedule channel to be closed 71 Closer c = new Closer(source); 72 int when = 1000 + rand.nextInt(2000); 73 Future<Void> result = pool.schedule(c, when, TimeUnit.MILLISECONDS); 74 75 // the write should either succeed or else throw a 76 // ClosedChannelException (more likely an 77 // AsynchronousCloseException) 78 try { 79 for (;;) { 80 int limit = rand.nextInt(bb.capacity()); 81 bb.position(0); 82 bb.limit(limit); 83 int n = source.write(bb); 84 System.out.format("wrote %d, expected %d%n", n, limit); 85 } 86 } catch (ClosedChannelException expected) { 87 System.out.println(expected + " (expected)"); 88 } finally { 89 result.get(); 90 } 91 } 92 } 93 } 94 } finally { 95 pool.shutdown(); 96 } 97 } 98 }