99 lines
3.6 KiB
Java
99 lines
3.6 KiB
Java
/*
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* Copyright (c) 2012, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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/* @test
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* @summary Test asynchronous close during a blocking write
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* @key randomness
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*/
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import java.io.Closeable;
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import java.io.IOException;
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import java.nio.ByteBuffer;
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import java.nio.channels.*;
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import java.net.*;
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import java.util.concurrent.*;
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import java.util.Random;
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public class CloseDuringWrite {
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static final Random rand = new Random();
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/**
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* A task that closes a Closeable
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*/
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static class Closer implements Callable<Void> {
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final Closeable c;
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Closer(Closeable c) {
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this.c = c;
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}
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public Void call() throws IOException {
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c.close();
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return null;
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}
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}
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public static void main(String[] args) throws Exception {
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ScheduledExecutorService pool = Executors.newSingleThreadScheduledExecutor();
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try {
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try (ServerSocketChannel ssc = ServerSocketChannel.open()) {
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ssc.bind(new InetSocketAddress(0));
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InetAddress lh = InetAddress.getLocalHost();
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int port = ssc.socket().getLocalPort();
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SocketAddress sa = new InetSocketAddress(lh, port);
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ByteBuffer bb = ByteBuffer.allocate(2*1024*1024);
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for (int i=0; i<20; i++) {
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try (SocketChannel source = SocketChannel.open(sa);
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SocketChannel sink = ssc.accept())
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{
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// schedule channel to be closed
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Closer c = new Closer(source);
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int when = 1000 + rand.nextInt(2000);
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Future<Void> result = pool.schedule(c, when, TimeUnit.MILLISECONDS);
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// the write should either succeed or else throw a
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// ClosedChannelException (more likely an
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// AsynchronousCloseException)
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try {
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for (;;) {
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int limit = rand.nextInt(bb.capacity());
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bb.position(0);
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bb.limit(limit);
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int n = source.write(bb);
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System.out.format("wrote %d, expected %d%n", n, limit);
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}
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} catch (ClosedChannelException expected) {
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System.out.println(expected + " (expected)");
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} finally {
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result.get();
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}
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}
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}
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}
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} finally {
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pool.shutdown();
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}
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}
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}
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