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/*
* Copyright (c) 2008, 2013, 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 6842687
* @summary Unit test for AsynchronousChannelGroup
*/
import java.nio.ByteBuffer;
import java.nio.channels.*;
import java.net.*;
import java.util.concurrent.*;
import java.io.IOException;
public class Unbounded {
// number of concurrent completion handlers
static final int CONCURRENCY_COUNT = 256;
// set to true if an I/O operation fails
static volatile boolean failed;
// set to true when the test is done
static volatile boolean finished;
public static void main(String[] args) throws Exception {
// create listener to accept connections
AsynchronousServerSocketChannel listener =
AsynchronousServerSocketChannel.open()
.bind(new InetSocketAddress(0));
// establish connections
AsynchronousSocketChannel[] clients = new AsynchronousSocketChannel[CONCURRENCY_COUNT];
AsynchronousSocketChannel[] peers = new AsynchronousSocketChannel[CONCURRENCY_COUNT];
int port = ((InetSocketAddress)(listener.getLocalAddress())).getPort();
SocketAddress sa = new InetSocketAddress(InetAddress.getLocalHost(), port);
for (int i=0; i<CONCURRENCY_COUNT; i++) {
clients[i] = AsynchronousSocketChannel.open();
Future<Void> result = clients[i].connect(sa);
peers[i] = listener.accept().get();
result.get();
}
System.out.println("All connection established.");
// the barrier where all threads (plus the main thread) wait
final CyclicBarrier barrier = new CyclicBarrier(CONCURRENCY_COUNT+1);
// initiate a read operation on each channel.
for (AsynchronousSocketChannel client: clients) {
ByteBuffer buf = ByteBuffer.allocateDirect(100);
client.read(buf, client,
new CompletionHandler<Integer,AsynchronousSocketChannel>() {
public void completed(Integer bytesRead, AsynchronousSocketChannel ch) {
try {
ch.close();
barrier.await();
} catch (Exception x) {
throw new AssertionError(x);
}
}
public void failed(Throwable exc, AsynchronousSocketChannel ch) {
failed = true;
System.err.println("read failed: " + exc);
completed(0, ch);
}
});
}
System.out.println("All read operations outstanding.");
// write data to each of the accepted connections
for (AsynchronousSocketChannel peer: peers) {
peer.write(ByteBuffer.wrap("welcome".getBytes())).get();
peer.shutdownOutput();
peer.close();
}
// wait for all threads to reach the barrier
System.out.println("Waiting for all threads to reach barrier");
barrier.await();
// finish up
finished = true;
listener.close();
if (failed)
throw new RuntimeException("I/O operation failed, see log for details");
}
}
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