| /* |
| * Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| /* @test |
| * @bug 4607272 |
| * @summary Test Channels methods for interoperability between streams and |
| * asynchronous byte channels |
| * @key randomness |
| */ |
| |
| import java.net.*; |
| import java.io.*; |
| import java.nio.channels.*; |
| import java.util.Random; |
| |
| public class Basic2 { |
| |
| static final Random rand = new Random(); |
| |
| public static void main(String[] args) throws Exception { |
| // establish loopback connection |
| AsynchronousServerSocketChannel listener = |
| AsynchronousServerSocketChannel.open().bind(new InetSocketAddress(0)); |
| int port = ((InetSocketAddress)(listener.getLocalAddress())).getPort(); |
| InetSocketAddress isa = |
| new InetSocketAddress(InetAddress.getLocalHost(), port); |
| AsynchronousSocketChannel ch1 = AsynchronousSocketChannel.open(); |
| ch1.connect(isa).get(); |
| AsynchronousSocketChannel ch2 = listener.accept().get(); |
| |
| // start thread to write to stream |
| Writer writer = new Writer(Channels.newOutputStream(ch1)); |
| Thread writerThread = new Thread(writer); |
| writerThread.start(); |
| |
| // start thread to read from stream |
| Reader reader = new Reader(Channels.newInputStream(ch2)); |
| Thread readerThread = new Thread(reader); |
| readerThread.start(); |
| |
| // wait for threads to complete |
| writerThread.join(); |
| readerThread.join(); |
| |
| // shutdown listener |
| listener.close(); |
| |
| // check that reader received what we expected |
| if (reader.total() != writer.total()) |
| throw new RuntimeException("Unexpected number of bytes read"); |
| if (reader.hash() != writer.hash()) |
| throw new RuntimeException("Hash incorrect for bytes read"); |
| |
| // channels should be closed |
| if (ch1.isOpen() || ch2.isOpen()) |
| throw new RuntimeException("Channels should be closed"); |
| } |
| |
| static class Reader implements Runnable { |
| private final InputStream in; |
| private volatile int total; |
| private volatile int hash; |
| |
| Reader(InputStream in) { |
| this.in = in; |
| } |
| |
| public void run() { |
| try { |
| int n; |
| do { |
| // random offset/len |
| byte[] buf = new byte[128 + rand.nextInt(128)]; |
| int len, off; |
| if (rand.nextBoolean()) { |
| len = buf.length; |
| off = 0; |
| n = in.read(buf); |
| } else { |
| len = 1 + rand.nextInt(64); |
| off = rand.nextInt(64); |
| n = in.read(buf, off, len); |
| } |
| if (n > len) |
| throw new RuntimeException("Too many bytes read"); |
| if (n > 0) { |
| total += n; |
| for (int i=0; i<n; i++) { |
| int value = buf[off + i]; |
| hash = hash ^ value; |
| } |
| } |
| } while (n > 0); |
| in.close(); |
| |
| } catch (IOException x) { |
| x.printStackTrace(); |
| } |
| } |
| |
| int total() { return total; } |
| int hash() { return hash; } |
| } |
| |
| static class Writer implements Runnable { |
| private final OutputStream out; |
| private final int total; |
| private volatile int hash; |
| |
| Writer(OutputStream out) { |
| this.out = out; |
| this.total = 50*1000 + rand.nextInt(50*1000); |
| } |
| |
| public void run() { |
| hash = 0; |
| int rem = total; |
| try { |
| do { |
| byte[] buf = new byte[1 + rand.nextInt(rem)]; |
| int off, len; |
| |
| // write random bytes |
| if (rand.nextBoolean()) { |
| off = 0; |
| len = buf.length; |
| } else { |
| off = rand.nextInt(buf.length); |
| int r = buf.length - off; |
| len = (r <= 1) ? 1 : (1 + rand.nextInt(r)); |
| } |
| for (int i=0; i<len; i++) { |
| byte value = (byte)rand.nextInt(256); |
| buf[off + i] = value; |
| hash = hash ^ value; |
| } |
| if ((off == 0) && (len == buf.length)) { |
| out.write(buf); |
| } else { |
| out.write(buf, off, len); |
| } |
| rem -= len; |
| } while (rem > 0); |
| |
| // close stream when done |
| out.close(); |
| |
| } catch (IOException x) { |
| x.printStackTrace(); |
| } |
| } |
| |
| int total() { return total; } |
| int hash() { return hash; } |
| } |
| } |