Basic2.java revision 893:f06f30b29f36
1/* 2 * Copyright 2008-2009 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, 20 * CA 95054 USA or visit www.sun.com if you need additional information or 21 * have any questions. 22 */ 23 24/* @test 25 * @bug 4607272 26 * @summary Test Channels methods for interoperability between streams and 27 * asynchronous byte channels 28 */ 29 30import java.net.*; 31import java.io.*; 32import java.nio.channels.*; 33import java.util.Random; 34 35public class Basic2 { 36 37 static final Random rand = new Random(); 38 39 public static void main(String[] args) throws Exception { 40 // establish loopback connection 41 AsynchronousServerSocketChannel listener = 42 AsynchronousServerSocketChannel.open().bind(new InetSocketAddress(0)); 43 int port = ((InetSocketAddress)(listener.getLocalAddress())).getPort(); 44 InetSocketAddress isa = 45 new InetSocketAddress(InetAddress.getLocalHost(), port); 46 AsynchronousSocketChannel ch1 = AsynchronousSocketChannel.open(); 47 ch1.connect(isa).get(); 48 AsynchronousSocketChannel ch2 = listener.accept().get(); 49 50 // start thread to write to stream 51 Writer writer = new Writer(Channels.newOutputStream(ch1)); 52 Thread writerThread = new Thread(writer); 53 writerThread.start(); 54 55 // start thread to read from stream 56 Reader reader = new Reader(Channels.newInputStream(ch2)); 57 Thread readerThread = new Thread(reader); 58 readerThread.start(); 59 60 // wait for threads to complete 61 writerThread.join(); 62 readerThread.join(); 63 64 // check that reader received what we expected 65 if (reader.total() != writer.total()) 66 throw new RuntimeException("Unexpected number of bytes read"); 67 if (reader.hash() != writer.hash()) 68 throw new RuntimeException("Hash incorrect for bytes read"); 69 70 // channels should be closed 71 if (ch1.isOpen() || ch2.isOpen()) 72 throw new RuntimeException("Channels should be closed"); 73 } 74 75 static class Reader implements Runnable { 76 private final InputStream in; 77 private volatile int total; 78 private volatile int hash; 79 80 Reader(InputStream in) { 81 this.in = in; 82 } 83 84 public void run() { 85 try { 86 int n; 87 do { 88 // random offset/len 89 byte[] buf = new byte[128 + rand.nextInt(128)]; 90 int len, off; 91 if (rand.nextBoolean()) { 92 len = buf.length; 93 off = 0; 94 n = in.read(buf); 95 } else { 96 len = 1 + rand.nextInt(64); 97 off = rand.nextInt(64); 98 n = in.read(buf, off, len); 99 } 100 if (n > len) 101 throw new RuntimeException("Too many bytes read"); 102 if (n > 0) { 103 total += n; 104 for (int i=0; i<n; i++) { 105 int value = buf[off + i]; 106 hash = hash ^ value; 107 } 108 } 109 } while (n > 0); 110 in.close(); 111 112 } catch (IOException x) { 113 x.printStackTrace(); 114 } 115 } 116 117 int total() { return total; } 118 int hash() { return hash; } 119 } 120 121 static class Writer implements Runnable { 122 private final OutputStream out; 123 private final int total; 124 private volatile int hash; 125 126 Writer(OutputStream out) { 127 this.out = out; 128 this.total = 50*1000 + rand.nextInt(50*1000); 129 } 130 131 public void run() { 132 hash = 0; 133 int rem = total; 134 try { 135 do { 136 byte[] buf = new byte[1 + rand.nextInt(rem)]; 137 int off, len; 138 139 // write random bytes 140 if (rand.nextBoolean()) { 141 off = 0; 142 len = buf.length; 143 } else { 144 off = rand.nextInt(buf.length); 145 int r = buf.length - off; 146 len = (r <= 1) ? 1 : (1 + rand.nextInt(r)); 147 } 148 for (int i=0; i<len; i++) { 149 byte value = (byte)rand.nextInt(256); 150 buf[off + i] = value; 151 hash = hash ^ value; 152 } 153 if ((off == 0) && (len == buf.length)) { 154 out.write(buf); 155 } else { 156 out.write(buf, off, len); 157 } 158 rem -= len; 159 } while (rem > 0); 160 161 // close stream when done 162 out.close(); 163 164 } catch (IOException x) { 165 x.printStackTrace(); 166 } 167 } 168 169 int total() { return total; } 170 int hash() { return hash; } 171 } 172} 173