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/*
* Copyright (c) 2018, 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 8201315
* @build SelectorUtils
* @run main RegisterDuringSelect
* @summary Test that channels can be registered, interest ops can changed,
* and keys cancelled while a selection operation is in progress.
*/
import java.io.IOException;
import java.nio.channels.Pipe;
import java.nio.channels.SelectionKey;
import java.nio.channels.Selector;
public class RegisterDuringSelect {
interface TestOperation {
void accept(Thread t, Selector sel, Pipe.SourceChannel sc) throws Exception;
}
static class Test {
final Selector sel;
final Pipe p;
final Pipe.SourceChannel sc;
Test() throws Exception {
sel = Selector.open();
p = Pipe.open();
sc = p.source();
sc.configureBlocking(false);
}
void test(TestOperation op) throws Exception {
try {
Thread t = new Thread(() -> {
try {
sel.select();
} catch (IOException ex) {
throw new RuntimeException(ex);
}
});
t.start();
op.accept(t, sel, sc);
} finally {
sel.close();
p.source().close();
p.sink().close();
}
}
}
/**
* Invoke register, interestOps, and cancel concurrently with a thread
* doing a selection operation
*/
public static void main(String args[]) throws Exception {
new Test().test((t, sel, sc) -> {
System.out.println("register ...");
// spin until make sure select is invoked
SelectorUtils.spinUntilLocked(t, sel);
SelectionKey key = sc.register(sel, SelectionKey.OP_READ);
try {
if (!sel.keys().contains(key))
throw new RuntimeException("key not in key set");
} finally {
sel.wakeup();
t.join();
}
});
new Test().test((t, sel, sc) -> {
System.out.println("interestOps ...");
SelectionKey key = sc.register(sel, SelectionKey.OP_READ);
// spin until make sure select is invoked
SelectorUtils.spinUntilLocked(t, sel);
key.interestOps(0);
try {
if (key.interestOps() != 0)
throw new RuntimeException("interested ops not cleared");
} finally {
sel.wakeup();
t.join();
}
});
new Test().test((t, sel, sc) -> {
System.out.println("cancel ...");
SelectionKey key = sc.register(sel, SelectionKey.OP_READ);
// spin until make sure select is invoked
SelectorUtils.spinUntilLocked(t, sel);
key.cancel();
sel.wakeup();
t.join();
if (sel.keys().contains(key))
throw new RuntimeException("key not removed from key set");
});
}
}
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