1 /*
   2  * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  */
  23 
  24 /*
  25  *
  26  *
  27  * Used in conjunction to EchoService to test System.inheritedChannel().
  28  *
  29  * The first test is the TCP echo test. A service is launched with a TCP
  30  * socket and a TCP message is sent to the service. The test checks that
  31  * the message is correctly echoed.
  32  *
  33  * The second test is a UDP echo test. A service is launched with a UDP
  34  * socket and a UDP packet is sent to the service. The test checks that
  35  * the packet is correctly echoed.
  36  *
  37  */
  38 import java.net.*;
  39 import java.io.*;
  40 import java.nio.ByteBuffer;
  41 import java.nio.channels.*;
  42 import java.util.Random;
  43 
  44 public class EchoTest {
  45 
  46     private static int failures = 0;
  47 
  48     private static String ECHO_SERVICE = "EchoService";
  49 
  50     /*
  51      * Sends a message with random bytes to the service, and then waits for
  52      * a reply (with timeout). Once the reply is received it is checked to ensure
  53      * that it matches the original message.
  54      */
  55     private static void TCPEchoTest() throws IOException {
  56         SocketChannel sc = Launcher.launchWithSocketChannel(ECHO_SERVICE, null);
  57 
  58         String msg = "Where's that damn torpedo?";
  59         int repeat = 100;
  60         int size = msg.length() * repeat;
  61 
  62         // generate bytes into a buffer and send it to the service
  63 
  64         ByteBuffer bb1 = ByteBuffer.allocate(size);
  65         Random gen = new Random();
  66         for (int i=0; i<repeat; i++) {
  67             bb1.put(msg.getBytes("UTF-8"));
  68         }
  69         bb1.flip();
  70         sc.write(bb1);
  71 
  72         // now we put the channel into non-blocking mode and we read the
  73         // reply from the service into a second buffer.
  74 
  75         ByteBuffer bb2 = ByteBuffer.allocate(size+100);
  76         sc.configureBlocking(false);
  77         Selector sel = sc.provider().openSelector();
  78         SelectionKey sk = sc.register(sel, SelectionKey.OP_READ);
  79         int nread = 0;
  80         long to = 5000;
  81         while (nread < size) {
  82             long st = System.currentTimeMillis();
  83             sel.select(to);
  84             if (sk.isReadable()) {
  85                 int n = sc.read(bb2);
  86                 if (n > 0) {
  87                     nread += n;
  88                 }
  89                 if (n < 0) {
  90                     break;              // EOF
  91                 }
  92             }
  93             sel.selectedKeys().remove(sk);
  94             to -= System.currentTimeMillis() - st;
  95             if (to <= 0) {
  96                 break;
  97             }
  98         }
  99         sc.close();
 100 
 101         // and compare the response
 102 
 103         boolean err = false;
 104 
 105         if (nread != size) {
 106             err = true;
 107         } else {
 108             bb1.flip();
 109             bb2.flip();
 110             while (bb1.hasRemaining()) {
 111                 if (bb1.get() != bb2.get()) {
 112                     err = true;
 113                 }
 114             }
 115         }
 116 
 117         // if error print out the response from the service (could be a stack trace)
 118         if (err) {
 119             System.err.println("Bad response or premature EOF, bytes read: ");
 120             bb2.flip();
 121             while (bb2.hasRemaining()) {
 122                 char c = (char)bb2.get();
 123                 System.out.print(c);
 124             }
 125             throw new RuntimeException("Bad response or premature EOF from service");
 126         }
 127     }
 128 
 129     /*
 130      * Send a UDP packet to the service, wait for a reply (with timeout). Finally
 131      * check that the packet is the same length as the original.
 132      */
 133     private static void UDPEchoTest() throws IOException {
 134         DatagramChannel dc = Launcher.launchWithDatagramChannel(ECHO_SERVICE, null);
 135 
 136         String msg = "I was out saving the galaxy when your grandfather was in diapers";
 137 
 138         ByteBuffer bb = ByteBuffer.wrap(msg.getBytes("UTF-8"));
 139         dc.write(bb);
 140 
 141         // and receive the echo
 142         byte b[] = new byte[msg.length() + 100];
 143         DatagramPacket pkt2 = new DatagramPacket(b, b.length);
 144         dc.socket().setSoTimeout(5000);
 145         dc.socket().receive(pkt2);
 146 
 147         if (pkt2.getLength() != msg.length()) {
 148             throw new RuntimeException("Received packet of incorrect length");
 149         }
 150 
 151         dc.close();
 152     }
 153 
 154     public static void main(String args[]) throws IOException {
 155 
 156         // TCP echo
 157         try {
 158             TCPEchoTest();
 159             System.out.println("TCP echo test passed.");
 160         } catch (Exception x) {
 161             System.err.println(x);
 162             failures++;
 163         }
 164 
 165         // UDP echo
 166         try {
 167             UDPEchoTest();
 168             System.out.println("UDP echo test passed.");
 169         } catch (Exception x) {
 170             x.printStackTrace();
 171             System.err.println(x);
 172             failures++;
 173         }
 174 
 175         if (failures > 0) {
 176             throw new RuntimeException("Test failed - see log for details");
 177         }
 178     }
 179 
 180 }