1 /* 2 * Copyright (c) 2002, 2013, 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 4777504 8024883 26 * @summary Ensure that a Selector can return at least 100 selected keys 27 * @author Mark Reinhold 28 * @library .. 29 * @build SelectorLimit 30 * @run main/othervm SelectorLimit 31 * @run main/othervm -Dsun.nio.ch.maxUpdateArraySize=128 SelectorLimit 32 */ 33 34 import java.io.*; 35 import java.net.*; 36 import java.nio.*; 37 import java.nio.channels.*; 38 import java.util.*; 39 40 41 public class SelectorLimit { 42 43 static PrintStream log = System.err; 44 45 static class Listener 46 extends TestThread 47 { 48 volatile int count = 0; 49 private ServerSocketChannel ssc; 50 Listener(ServerSocketChannel ssc)51 Listener(ServerSocketChannel ssc) { 52 super("Listener"); 53 this.ssc = ssc; 54 } 55 go()56 void go() throws IOException { 57 for (;;) { 58 ssc.accept(); 59 count++; 60 } 61 } 62 63 } 64 65 static final int N_KEYS = 500; 66 static final int MIN_KEYS = 100; 67 main(String[] args)68 public static void main(String[] args) throws Exception { 69 ServerSocketChannel ssc = ServerSocketChannel.open(); 70 TestUtil.bind(ssc); 71 Listener lth = new Listener(ssc); 72 lth.start(); 73 74 Selector sel = Selector.open(); 75 SocketChannel[] sca = new SocketChannel[N_KEYS]; 76 for (int i = 0; i < N_KEYS; i++) { 77 SocketChannel sc = SocketChannel.open(); 78 sc.configureBlocking(false); 79 sc.register(sel, SelectionKey.OP_CONNECT | SelectionKey.OP_WRITE); 80 sc.connect(ssc.socket().getLocalSocketAddress()); 81 } 82 83 for (int i = 0; i < 10; i++) { 84 if (lth.count >= MIN_KEYS) 85 break; 86 Thread.sleep(1000); 87 } 88 log.println(lth.count + " connections accepted"); 89 Thread.sleep(500); 90 91 int n = sel.select(); 92 log.println(n + " keys selected"); 93 if (n < MIN_KEYS) 94 throw new Exception("Only selected " + n + " keys"); 95 96 } 97 98 } 99