File size: 2,311 Bytes
7e59e4c | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 | package Server;
/*
* Server.java
*/
import java.io.*;
import java.net.*;
import java.util.*;
import Common.*;
/**This is the main GUI class of the Server.
* The GUI should be built in this class.
*/
public class Server
{
/**This is the Network Component this Server GUI uses
* for sending and receiving messages.
*/
protected ServerNetwork myServerNetwork;
/**Constructor to build the Server.
* @param p The port number where the host/server is listening.
*/
public Server(int p)
{
this.myServerNetwork = new ServerNetwork(this, p);
}
/**This method is called by the ServerNetwork whenever
* the ServerSocketReader receives a message from the client.
* @param msg The message which the server received from the client.
*/
public void gotMessageFromClient(Message msg)
{
showMessage("\nMESSAGE RECEIVED FROM THE CLIENT: " + msg.printMessageDetails());
showMessage("\nSENDING THE MESSAGE BACK TO CLIENT...");
this.myServerNetwork.sendMessageToClient(msg);
}
/** Main function taking one or two arguments
* @param arg[0] The Port number to listen on.
*/
public static void main (String args[])
{
int hostPort;
if (args.length < 1 || args.length > 1)
{
error("Usage: java Server port_number");
}
try
{
hostPort = Integer.parseInt(args[0]);
if (hostPort < 0 || hostPort > 65535)
{
error("Port number out of range (0, 65535): " + hostPort);
}
Server server = new Server(hostPort);
}
catch (NumberFormatException e)
{
error("Port number not in valid format: " + args[0]);
}
}
/**A small function to display errors.
* System exits after showing the error message
* @param msg The message string to show.
*/
private static void error(String message)
{
System.out.println("Server error: " + message);
System.exit(1);
}
/**A small function to display warnings.
* @param msg The message string to show.
*/
private static void warning(String message)
{
System.out.println("Server warning: " + message);
}
/**A small function to display messages.
* @param msg The message string to show.
*/
private void showMessage(String msg)
{
System.err.println("Server: " + msg);
}
}
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