OpRead.java revision 6073:cea72c2bf071
1/* 2 * Copyright (c) 2002, 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 * @bug 4755720 26 * @summary Test if OP_READ is detected with OP_WRITE in interestOps 27 */ 28 29import java.net.*; 30import java.nio.*; 31import java.nio.channels.*; 32import java.util.*; 33 34public class OpRead { 35 36 static void test() throws Exception { 37 ServerSocketChannel ssc = null; 38 SocketChannel sc = null; 39 SocketChannel peer = null; 40 try { 41 ssc = ServerSocketChannel.open().bind(new InetSocketAddress(0)); 42 43 // loopback connection 44 InetAddress lh = InetAddress.getLocalHost(); 45 sc = SocketChannel.open(new InetSocketAddress(lh, ssc.socket().getLocalPort())); 46 peer = ssc.accept(); 47 48 // peer sends message so that "sc" will be readable 49 int n = peer.write(ByteBuffer.wrap("Hello".getBytes())); 50 assert n > 0; 51 52 sc.configureBlocking(false); 53 54 Selector selector = Selector.open(); 55 SelectionKey key = sc.register(selector, SelectionKey.OP_READ | 56 SelectionKey.OP_WRITE); 57 58 boolean done = false; 59 int failCount = 0; 60 while (!done) { 61 int nSelected = selector.select(); 62 if (nSelected > 0) { 63 if (nSelected > 1) 64 throw new RuntimeException("More than one channel selected"); 65 Set<SelectionKey> keys = selector.selectedKeys(); 66 Iterator<SelectionKey> iterator = keys.iterator(); 67 while (iterator.hasNext()) { 68 key = iterator.next(); 69 iterator.remove(); 70 if (key.isWritable()) { 71 failCount++; 72 if (failCount > 10) 73 throw new RuntimeException("Test failed"); 74 Thread.sleep(250); 75 } 76 if (key.isReadable()) { 77 done = true; 78 } 79 } 80 } 81 } 82 } finally { 83 if (peer != null) peer.close(); 84 if (sc != null) sc.close(); 85 if (ssc != null) ssc.close(); 86 } 87 } 88 89 public static void main(String[] args) throws Exception { 90 test(); 91 } 92 93} 94