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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
* @run testng UpdateReadyOps
* @summary Test that the ready set from a selection operation is bitwise-disjoined
* into a key's ready set when the key is already in the selected-key set
*/
import java.io.Closeable;
import java.io.IOException;
import java.net.InetAddress;
import java.net.InetSocketAddress;
import java.nio.ByteBuffer;
import java.nio.channels.SelectionKey;
import java.nio.channels.Selector;
import java.nio.channels.ServerSocketChannel;
import java.nio.channels.SocketChannel;
import org.testng.annotations.Test;
import static org.testng.Assert.*;
@Test
public class UpdateReadyOps {
/**
* Test that OP_WRITE is preserved when updating the ready set of a key in
* the selected-key set to add OP_READ.
*/
public void testOpWritePreserved() throws Exception {
try (ConnectionPair pair = new ConnectionPair();
Selector sel = Selector.open()) {
SocketChannel sc1 = pair.channel1();
SocketChannel sc2 = pair.channel2();
sc1.configureBlocking(false);
SelectionKey key = sc1.register(sel, SelectionKey.OP_WRITE);
int updated = sel.select();
assertTrue(updated == 1);
assertTrue(sel.selectedKeys().contains(key));
assertFalse(key.isReadable());
assertTrue(key.isWritable());
// select again, should be no updates
updated = sel.select();
assertTrue(updated == 0);
assertTrue(sel.selectedKeys().contains(key));
assertFalse(key.isReadable());
assertTrue(key.isWritable());
// write some bytes
sc2.write(helloMessage());
// change interest ops to OP_READ, do a selection operation, and
// check that the ready set becomes OP_READ|OP_WRITE.
key.interestOps(SelectionKey.OP_READ);
updated = sel.select();
assertTrue(updated == 1);
assertTrue(sel.selectedKeys().size() == 1);
assertTrue(key.isReadable());
assertTrue(key.isWritable());
assertTrue(key.readyOps() == (SelectionKey.OP_READ|SelectionKey.OP_WRITE));
// select again, should be no updates
updated = sel.select();
assertTrue(updated == 0);
assertTrue(sel.selectedKeys().size() == 1);
assertTrue(key.isReadable());
assertTrue(key.isWritable());
}
}
/**
* Test that OP_READ is preserved when updating the ready set of a key in
* the selected-key set to add OP_WRITE.
*/
public void testOpReadPreserved() throws Exception {
try (ConnectionPair pair = new ConnectionPair();
Selector sel = Selector.open()) {
SocketChannel sc1 = pair.channel1();
SocketChannel sc2 = pair.channel2();
sc1.configureBlocking(false);
SelectionKey key = sc1.register(sel, SelectionKey.OP_READ);
// write some bytes
sc2.write(helloMessage());
int updated = sel.select();
assertTrue(updated == 1);
assertTrue(sel.selectedKeys().size() == 1);
assertTrue(sel.selectedKeys().contains(key));
assertTrue(key.isReadable());
assertFalse(key.isWritable());
// select again, should be no updates
updated = sel.select();
assertTrue(updated == 0);
assertTrue(sel.selectedKeys().contains(key));
assertTrue(key.isReadable());
assertFalse(key.isWritable());
key.interestOps(SelectionKey.OP_WRITE);
updated = sel.select();
assertTrue(updated == 1);
assertTrue(sel.selectedKeys().size() == 1);
assertTrue(sel.selectedKeys().contains(key));
assertTrue(key.isReadable());
assertTrue(key.isWritable());
assertTrue(key.readyOps() == (SelectionKey.OP_READ|SelectionKey.OP_WRITE));
// select again, should be no updates
updated = sel.select();
assertTrue(updated == 0);
assertTrue(sel.selectedKeys().size() == 1);
assertTrue(key.isReadable());
assertTrue(key.isWritable());
}
}
static class ConnectionPair implements Closeable {
private final SocketChannel sc1;
private final SocketChannel sc2;
ConnectionPair() throws IOException {
InetAddress lb = InetAddress.getLoopbackAddress();
try (ServerSocketChannel ssc = ServerSocketChannel.open()) {
ssc.bind(new InetSocketAddress(lb, 0));
this.sc1 = SocketChannel.open(ssc.getLocalAddress());
this.sc2 = ssc.accept();
}
}
SocketChannel channel1() {
return sc1;
}
SocketChannel channel2() {
return sc2;
}
public void close() throws IOException {
sc1.close();
sc2.close();
}
}
static ByteBuffer helloMessage() throws Exception {
return ByteBuffer.wrap("hello".getBytes("UTF-8"));
}
}
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