/*
* Copyright (c) 2012, 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.
*
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*/
/* @test
* @summary Test asynchronous close during a blocking write
*/
import java.io.Closeable;
import java.io.IOException;
import java.nio.ByteBuffer;
import java.nio.channels.*;
import java.net.*;
import java.util.concurrent.*;
import java.util.Random;
public class CloseDuringWrite {
static final Random rand = new Random();
/**
* A task that closes a Closeable
*/
static class Closer implements Callable<Void> {
final Closeable c;
Closer(Closeable c) {
this.c = c;
}
public Void call() throws IOException {
c.close();
return null;
}
}
public static void main(String[] args) throws Exception {
ScheduledExecutorService pool = Executors.newSingleThreadScheduledExecutor();
try {
try (ServerSocketChannel ssc = ServerSocketChannel.open()) {
ssc.bind(new InetSocketAddress(0));
InetAddress lh = InetAddress.getLocalHost();
int port = ssc.socket().getLocalPort();
SocketAddress sa = new InetSocketAddress(lh, port);
ByteBuffer bb = ByteBuffer.allocate(2*1024*1024);
for (int i=0; i<20; i++) {
try (SocketChannel source = SocketChannel.open(sa);
SocketChannel sink = ssc.accept())
{
// schedule channel to be closed
Closer c = new Closer(source);
int when = 1000 + rand.nextInt(2000);
Future<Void> result = pool.schedule(c, when, TimeUnit.MILLISECONDS);
// the write should either succeed or else throw a
// ClosedChannelException (more likely an
// AsynchronousCloseException)
try {
for (;;) {
int limit = rand.nextInt(bb.capacity());
bb.position(0);
bb.limit(limit);
int n = source.write(bb);
System.out.format("wrote %d, expected %d%n", n, limit);
}
} catch (ClosedChannelException expected) {
System.out.println(expected + " (expected)");
} finally {
result.get();
}
}
}
}
} finally {
pool.shutdown();
}
}
}