J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 1999 Sun Microsystems, Inc. All Rights Reserved. |
| 3 | * |
| 4 | * Redistribution and use in source and binary forms, with or without |
| 5 | * modification, are permitted provided that the following conditions |
| 6 | * are met: |
| 7 | * |
| 8 | * - Redistributions of source code must retain the above copyright |
| 9 | * notice, this list of conditions and the following disclaimer. |
| 10 | * |
| 11 | * - Redistributions in binary form must reproduce the above copyright |
| 12 | * notice, this list of conditions and the following disclaimer in the |
| 13 | * documentation and/or other materials provided with the distribution. |
| 14 | * |
| 15 | * - Neither the name of Sun Microsystems nor the names of its |
| 16 | * contributors may be used to endorse or promote products derived |
| 17 | * from this software without specific prior written permission. |
| 18 | * |
| 19 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS |
| 20 | * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, |
| 21 | * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| 22 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR |
| 23 | * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
| 24 | * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
| 25 | * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
| 26 | * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF |
| 27 | * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING |
| 28 | * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
| 29 | * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 30 | */ |
| 31 | |
| 32 | import java.io.*; |
| 33 | import java.net.*; |
| 34 | import java.lang.Byte; |
| 35 | |
| 36 | /** |
| 37 | * Simple Java "server" using a single thread to handle each connection. |
| 38 | */ |
| 39 | |
| 40 | public class SimpleServer |
| 41 | { |
| 42 | private final static int BYTESPEROP= PollingServer.BYTESPEROP; |
| 43 | private final static int PORTNUM = PollingServer.PORTNUM; |
| 44 | private final static int MAXCONN = PollingServer.MAXCONN; |
| 45 | |
| 46 | /* |
| 47 | * This synchronization object protects access to certain |
| 48 | * data (bytesRead,eventsToProcess) by concurrent Consumer threads. |
| 49 | */ |
| 50 | private final static Object eventSync = new Object(); |
| 51 | |
| 52 | private static InputStream[] instr = new InputStream[MAXCONN]; |
| 53 | private static int bytesRead; |
| 54 | private static int bytesToRead; |
| 55 | |
| 56 | public SimpleServer() { |
| 57 | Socket[] sockArr = new Socket[MAXCONN]; |
| 58 | long timestart, timestop; |
| 59 | int bytes; |
| 60 | int totalConn=0; |
| 61 | |
| 62 | |
| 63 | System.out.println ("Serv: Initializing port " + PORTNUM); |
| 64 | try { |
| 65 | |
| 66 | ServerSocket skMain = new ServerSocket (PORTNUM); |
| 67 | |
| 68 | bytesRead = 0; |
| 69 | Socket ctrlSock = skMain.accept(); |
| 70 | |
| 71 | BufferedReader ctrlReader = |
| 72 | new BufferedReader(new InputStreamReader(ctrlSock.getInputStream())); |
| 73 | String ctrlString = ctrlReader.readLine(); |
| 74 | bytesToRead = Integer.valueOf(ctrlString).intValue(); |
| 75 | ctrlString = ctrlReader.readLine(); |
| 76 | totalConn = Integer.valueOf(ctrlString).intValue(); |
| 77 | |
| 78 | System.out.println("Receiving " + bytesToRead + " bytes from " + |
| 79 | totalConn + " client connections"); |
| 80 | |
| 81 | timestart = System.currentTimeMillis(); |
| 82 | |
| 83 | /* |
| 84 | * Take connections, spawn off connection handling threads |
| 85 | */ |
| 86 | ConnHandler[] connHA = new ConnHandler[MAXCONN]; |
| 87 | int conn = 0; |
| 88 | while ( conn < totalConn ) { |
| 89 | Socket sock = skMain.accept(); |
| 90 | connHA[conn] = new ConnHandler(sock.getInputStream()); |
| 91 | connHA[conn].start(); |
| 92 | conn++; |
| 93 | } |
| 94 | |
| 95 | while ( bytesRead < bytesToRead ) { |
| 96 | java.lang.Thread.sleep(500); |
| 97 | } |
| 98 | timestop = System.currentTimeMillis(); |
| 99 | System.out.println("Time for all reads (" + totalConn + |
| 100 | " sockets) : " + (timestop-timestart)); |
| 101 | // Tell the client it can now go away |
| 102 | byte[] buff = new byte[BYTESPEROP]; |
| 103 | ctrlSock.getOutputStream().write(buff,0,BYTESPEROP); |
| 104 | } catch (Exception exc) { exc.printStackTrace(); } |
| 105 | } |
| 106 | |
| 107 | /* |
| 108 | * main ... just create invoke the SimpleServer constructor. |
| 109 | */ |
| 110 | public static void main (String args[]) |
| 111 | { |
| 112 | SimpleServer server = new SimpleServer(); |
| 113 | } |
| 114 | |
| 115 | /* |
| 116 | * Connection Handler inner class...one of these per client connection. |
| 117 | */ |
| 118 | class ConnHandler extends Thread { |
| 119 | private InputStream instr; |
| 120 | public ConnHandler(InputStream inputStr) { instr = inputStr; } |
| 121 | |
| 122 | public void run() { |
| 123 | try { |
| 124 | int bytes; |
| 125 | byte[] buff = new byte[BYTESPEROP]; |
| 126 | |
| 127 | while ( bytesRead < bytesToRead ) { |
| 128 | bytes = instr.read (buff, 0, BYTESPEROP); |
| 129 | if (bytes > 0 ) { |
| 130 | synchronized(eventSync) { |
| 131 | bytesRead += bytes; |
| 132 | } |
| 133 | /* |
| 134 | * Any real server would do some synchronized and some |
| 135 | * unsynchronized work on behalf of the client, and |
| 136 | * most likely send some data back...but this is a |
| 137 | * gross oversimplification. |
| 138 | */ |
| 139 | } |
| 140 | else { |
| 141 | if (bytesRead < bytesToRead) |
| 142 | System.out.println("instr.read returned : " + bytes); |
| 143 | } |
| 144 | } |
| 145 | } |
| 146 | catch (Exception e) {e.printStackTrace();} |
| 147 | } |
| 148 | } |
| 149 | } |