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/*
* 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; }
}
}
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