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 4503092 8024883 26 * @summary Tests that Windows Selector can use more than 63 channels 27 * @run main LotsOfChannels 28 * @run main/othervm -Dsun.nio.ch.maxUpdateArraySize=64 LotsOfChannels 29 * @author kladko 30 */ 31 32import java.net.*; 33import java.io.*; 34import java.nio.*; 35import java.nio.channels.*; 36 37public class LotsOfChannels { 38 39 private final static int PIPES_COUNT = 256; 40 private final static int BUF_SIZE = 8192; 41 private final static int LOOPS = 10; 42 43 public static void main(String[] argv) throws Exception { 44 Pipe[] pipes = new Pipe[PIPES_COUNT]; 45 Pipe pipe = Pipe.open(); 46 Pipe.SinkChannel sink = pipe.sink(); 47 Pipe.SourceChannel source = pipe.source(); 48 Selector sel = Selector.open(); 49 source.configureBlocking(false); 50 source.register(sel, SelectionKey.OP_READ); 51 52 for (int i = 0; i< PIPES_COUNT; i++ ) { 53 pipes[i]= Pipe.open(); 54 Pipe.SourceChannel sc = pipes[i].source(); 55 sc.configureBlocking(false); 56 sc.register(sel, SelectionKey.OP_READ); 57 Pipe.SinkChannel sc2 = pipes[i].sink(); 58 sc2.configureBlocking(false); 59 sc2.register(sel, SelectionKey.OP_WRITE); 60 } 61 62 for (int i = 0 ; i < LOOPS; i++ ) { 63 sink.write(ByteBuffer.allocate(BUF_SIZE)); 64 int x = sel.selectNow(); 65 sel.selectedKeys().clear(); 66 source.read(ByteBuffer.allocate(BUF_SIZE)); 67 } 68 69 for (int i = 0; i < PIPES_COUNT; i++ ) { 70 pipes[i].sink().close(); 71 pipes[i].source().close(); 72 } 73 pipe.sink().close(); 74 pipe.source().close(); 75 sel.close(); 76 } 77} 78