| /* |
| * Copyright (c) 2002, 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 4669040 |
| * @summary Test DatagramChannel subsequent receives with no datagram ready |
| * @author Mike McCloskey |
| */ |
| |
| import java.io.*; |
| import java.net.*; |
| import java.nio.*; |
| import java.nio.channels.*; |
| import java.nio.charset.*; |
| |
| public class Sender { |
| |
| static PrintStream log = System.err; |
| |
| public static void main(String[] args) throws Exception { |
| test(); |
| } |
| |
| static void test() throws Exception { |
| Sprintable server = new Server(); |
| Sprintable client = new Client(); |
| |
| Thread serverThread = new Thread(server); |
| serverThread.start(); |
| while (!server.ready()) |
| Thread.sleep(50); |
| |
| Thread clientThread = new Thread(client); |
| clientThread.start(); |
| |
| serverThread.join(); |
| clientThread.join(); |
| |
| server.throwException(); |
| client.throwException(); |
| } |
| |
| public interface Sprintable extends Runnable { |
| public void throwException() throws Exception; |
| public boolean ready(); |
| } |
| |
| public static class Client implements Sprintable { |
| Exception e = null; |
| |
| public void throwException() throws Exception { |
| if (e != null) |
| throw e; |
| } |
| |
| private volatile boolean ready = false; |
| |
| public boolean ready() { |
| return ready; |
| } |
| |
| public void run() { |
| try { |
| DatagramChannel dc = DatagramChannel.open(); |
| ByteBuffer bb = ByteBuffer.allocateDirect(12); |
| bb.order(ByteOrder.BIG_ENDIAN); |
| bb.putInt(1).putLong(1); |
| bb.flip(); |
| InetAddress address = InetAddress.getLocalHost(); |
| InetSocketAddress isa = new InetSocketAddress(address, 8888); |
| dc.connect(isa); |
| dc.write(bb); |
| } catch (Exception ex) { |
| e = ex; |
| } |
| } |
| } |
| |
| public static class Server implements Sprintable { |
| Exception e = null; |
| private volatile boolean ready = false; |
| |
| public void throwException() throws Exception { |
| if (e != null) |
| throw e; |
| } |
| |
| public boolean ready() { |
| return ready; |
| } |
| |
| void showBuffer(String s, ByteBuffer bb) { |
| log.println(s); |
| bb.rewind(); |
| for (int i=0; i<bb.limit(); i++) { |
| byte element = bb.get(); |
| log.print(element); |
| } |
| log.println(); |
| } |
| |
| public void run() { |
| SocketAddress sa = null; |
| |
| try { |
| DatagramChannel dc = DatagramChannel.open(); |
| dc.socket().bind(new InetSocketAddress(8888)); |
| dc.configureBlocking(false); |
| ready = true; |
| ByteBuffer bb = ByteBuffer.allocateDirect(12); |
| bb.clear(); |
| // Get the one valid datagram |
| while (sa == null) |
| sa = dc.receive(bb); |
| sa = null; |
| for (int i=0; i<100; i++) { |
| bb.clear(); |
| sa = dc.receive(bb); |
| if (sa != null) |
| throw new RuntimeException("Test failed"); |
| } |
| dc.close(); |
| } catch (Exception ex) { |
| e = ex; |
| } |
| } |
| } |
| |
| } |