1 /* 2 * Copyright (c) 2008, 2010, 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 4607272 26 * @summary Test Channels methods for interoperability between streams and 27 * asynchronous byte channels 28 * @key randomness 29 */ 30 31 import java.net.*; 32 import java.io.*; 33 import java.nio.channels.*; 34 import java.util.Random; 35 36 public class Basic2 { 37 38 static final Random rand = new Random(); 39 40 public static void main(String[] args) throws Exception { 41 // establish loopback connection 42 AsynchronousServerSocketChannel listener = 43 AsynchronousServerSocketChannel.open().bind(new InetSocketAddress(0)); 44 int port = ((InetSocketAddress)(listener.getLocalAddress())).getPort(); 45 InetSocketAddress isa = 46 new InetSocketAddress(InetAddress.getLocalHost(), port); 47 AsynchronousSocketChannel ch1 = AsynchronousSocketChannel.open(); 48 ch1.connect(isa).get(); 49 AsynchronousSocketChannel ch2 = listener.accept().get(); 50 51 // start thread to write to stream 52 Writer writer = new Writer(Channels.newOutputStream(ch1)); 53 Thread writerThread = new Thread(writer); 54 writerThread.start(); 55 56 // start thread to read from stream 57 Reader reader = new Reader(Channels.newInputStream(ch2)); 58 Thread readerThread = new Thread(reader); 59 readerThread.start(); 60 61 // wait for threads to complete 62 writerThread.join(); 63 readerThread.join(); 64 65 // shutdown listener 66 listener.close(); 67 68 // check that reader received what we expected 69 if (reader.total() != writer.total()) 70 throw new RuntimeException("Unexpected number of bytes read"); 71 if (reader.hash() != writer.hash()) 72 throw new RuntimeException("Hash incorrect for bytes read"); 73 74 // channels should be closed 75 if (ch1.isOpen() || ch2.isOpen()) 76 throw new RuntimeException("Channels should be closed"); 77 } 78 79 static class Reader implements Runnable { 80 private final InputStream in; 81 private volatile int total; 82 private volatile int hash; 83 84 Reader(InputStream in) { 85 this.in = in; 86 } 87 88 public void run() { 89 try { 90 int n; 91 do { 92 // random offset/len 93 byte[] buf = new byte[128 + rand.nextInt(128)]; 94 int len, off; 95 if (rand.nextBoolean()) { 96 len = buf.length; 97 off = 0; 98 n = in.read(buf); 99 } else { 100 len = 1 + rand.nextInt(64); 101 off = rand.nextInt(64); 102 n = in.read(buf, off, len); 103 } 104 if (n > len) 105 throw new RuntimeException("Too many bytes read"); 106 if (n > 0) { 107 total += n; 108 for (int i=0; i<n; i++) { 109 int value = buf[off + i]; 110 hash = hash ^ value; 111 } 112 } 113 } while (n > 0); 114 in.close(); 115 116 } catch (IOException x) { 117 x.printStackTrace(); 118 } 119 } 120 121 int total() { return total; } 122 int hash() { return hash; } 123 } 124 125 static class Writer implements Runnable { 126 private final OutputStream out; 127 private final int total; 128 private volatile int hash; 129 130 Writer(OutputStream out) { 131 this.out = out; 132 this.total = 50*1000 + rand.nextInt(50*1000); 133 } 134 135 public void run() { 136 hash = 0; 137 int rem = total; 138 try { 139 do { 140 byte[] buf = new byte[1 + rand.nextInt(rem)]; 141 int off, len; 142 143 // write random bytes 144 if (rand.nextBoolean()) { 145 off = 0; 146 len = buf.length; 147 } else { 148 off = rand.nextInt(buf.length); 149 int r = buf.length - off; 150 len = (r <= 1) ? 1 : (1 + rand.nextInt(r)); 151 } 152 for (int i=0; i<len; i++) { 153 byte value = (byte)rand.nextInt(256); 154 buf[off + i] = value; 155 hash = hash ^ value; 156 } 157 if ((off == 0) && (len == buf.length)) { 158 out.write(buf); 159 } else { 160 out.write(buf, off, len); 161 } 162 rem -= len; 163 } while (rem > 0); 164 165 // close stream when done 166 out.close(); 167 168 } catch (IOException x) { 169 x.printStackTrace(); 170 } 171 } 172 173 int total() { return total; } 174 int hash() { return hash; } 175 } 176 }