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/*
* Copyright (c) 2000, 2010, 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
* @summary Test Selector with ServerSocketChannels
* @library ..
*/
import java.io.*;
import java.net.*;
import java.nio.*;
import java.nio.channels.*;
import java.nio.channels.spi.SelectorProvider;
import java.util.*;
public class BasicAccept {
static void server(ServerSocketChannel ssc) throws Exception {
Selector acceptSelector = Selector.open();
try {
ssc.configureBlocking(false);
SelectionKey acceptKey
= ssc.register(acceptSelector, SelectionKey.OP_ACCEPT);
for (;;) {
int n = acceptSelector.select();
if (Thread.interrupted())
break;
if (n == 0)
continue;
Set<SelectionKey> readyKeys = acceptSelector.selectedKeys();
Iterator<SelectionKey> i = readyKeys.iterator();
while (i.hasNext()) {
SelectionKey sk = i.next();
i.remove();
ServerSocketChannel nextReady
= (ServerSocketChannel)sk.channel();
SocketChannel sc = nextReady.accept();
ByteBuffer bb = ByteBuffer.wrap(new byte[] { 42 });
sc.write(bb);
sc.close();
}
}
} finally {
acceptSelector.close();
}
}
private static class Server extends TestThread {
final ServerSocketChannel ssc;
Server() throws IOException {
super("Server", System.err);
this.ssc = ServerSocketChannel.open()
.bind(new InetSocketAddress(0));
}
int port() {
return ssc.socket().getLocalPort();
}
void go() throws Exception {
try {
server(ssc);
} finally {
ssc.close();
}
}
}
static void client(int port) throws Exception {
// Get a connection from the server
InetAddress lh = InetAddress.getLocalHost();
InetSocketAddress isa
= new InetSocketAddress(lh, port);
int connectFailures = 0;
boolean result = false;
SocketChannel sc = SocketChannel.open();
for (;;) {
try {
result = sc.connect(isa);
break;
} catch (java.net.ConnectException e) {
connectFailures++;
if (connectFailures > 30)
throw new RuntimeException("Cannot connect");
Thread.currentThread().sleep(100);
sc = SocketChannel.open();
}
}
if (result) {
System.err.println("Connected");
} else {
// Only happens when server and client are on separate machines
System.err.println("Connection pending...");
connectFailures = 0;
while (!result) {
try {
result = sc.finishConnect();
if (!result)
System.err.println("Not finished");
Thread.sleep(50);
} catch (java.net.ConnectException e) {
Thread.sleep(100);
connectFailures++;
if (connectFailures > 30)
throw new RuntimeException("Cannot finish connecting");
}
}
System.err.println("Finished connecting");
}
ByteBuffer bb = ByteBuffer.allocateDirect(1024);
if (sc.read(bb) < 0)
throw new RuntimeException("Failed to read from server");
if (bb.get(0) != 42)
throw new RuntimeException("Read wrong byte from server");
System.err.println("Read from server");
sc.close();
}
public static void main(String[] args) throws Exception {
Server server = new Server();
server.start();
try {
client(server.port());
} finally {
server.interrupt();
server.finish(2000);
}
}
}
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