Finding the clients connected to a server

Hai Friends,
I am doing a project in grid computing. I have developed a socket program for the client and server side using java and multithreading.
I want to know the number of clirnts connected at a particular period of time and also the IP addresses of the client.
Can anyone please suggest us the code for doing that.

Create an object that describes each client. Something like:
public class Client
    private Socket socket;
    private WhatEver whatEverDataYouNeed;
    ...whatever methods you need...
}When a client connects create one of those objects and store it in a suitable data structure, e.g. LinkedList. When a client disconnects remove from list.
There should be a method in Socket that gives you the IP address, see the javadoc for Socket.

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Note: Microsoft is providing this information as a convenience to you. The sites are not controlled by Microsoft. Microsoft cannot make any representations regarding the quality, safety, or suitability of any software or information found there. Please make
sure that you completely understand the risk before retrieving any suggestions from the above link.
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DarylE. wrote:
We are trying to scale up the number of connections on our db - (dedicated not shared) .. but quickly consume the box.
Its 11gr1 - Linux .. 500G of memory ..
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With clients taking this much memory, we start to see swapping on the box. In our dev/qa environment the clients are in the MB range .. of course they are not seeing real world traffic so I presume that memory requirements are growing as the app runs.
Can we set something to reduce the footprint of the client connections?
Thanks for any tips..
If we get one db bounce this year .. we want to be right .. cant guess here..
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>Can we set something to reduce the footprint of the client connections?
no
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If you simply SUM every reported client size, it will greatly exceed total RAM (in most cases)
The fact that any swap is used is in itself not a negative indicator.
run vmstat like below
all is OK when (si + so) is less than (bi + bo)
[oracle@localhost dbs]$ vmstat 10 6
procs -----------memory---------- ---swap-- -----io---- --system-- -----cpu------
r b   swpd   free   buff     cache     si   so    bi    bo   in   cs us sy id wa st
0 0     32 82684 20384 557096    0    0   120    32 1008 1057 3 7 88 1 0
0 0     32 82560 20408 557124    0    0     0    20 1031 1225 2 4 93 0 0
0 0     32 82560 20432 557116    0    0     0    16 1002 1183 2 6 92 0 0
0 0     32 79212 20456 557144    0    0     0    74 1007 1185 4 12 84 0 0
0 0     32 78592 20480 557148    0    0     0    21 999 998 2 5 92 0 0
0 0     32 78592 20504 557140    0    0     0    20 1002 929 2 7 91 0 0
[oracle@localhost dbs]$

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import java.io.*;
import java.net.*;
import java.util.*;
public class Server
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private ServerSocket ss;
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// Constructor and while-accept loop all in one.
public Server( int port ) throws IOException {
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private void listen( int port ) throws IOException {
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Enumeration getOutputStreams() {
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void removeConnection( Socket s ) {
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// Usage: java Server <port>
static public void main( String args[] ) throws Exception {
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    int port = Integer.parseInt( args[0] );
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    // accepting connections.
    new Server( port );
}CLIENT:
import java.io.*;
import java.net.*;
public class ServerThread extends Thread
// The Server that spawned us
private Server server;
// The Socket connected to our client
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public ServerThread( Server server, Socket socket ) {
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// This runs in a separate thread when start() is called in the
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      // Over and over, forever ...
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        // ... read the next message ...
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        // ... tell the world ...
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        // ... and have the server send it to all clients
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    } catch( EOFException ie ) {
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    } finally {
      // The connection is closed for one reason or another,
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}Thanks for your time.

CLIENT:
import java.applet.*;
import java.awt.*;
import java.awt.event.*;
import java.io.*;
import java.net.*;
public class Client extends Panel implements Runnable
// Components for the visual display of the chat windows
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private TextArea ta = new TextArea();
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private DataInputStream din;
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import java.awt.*;
import java.io.*;
import java.net.*;
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Thanks for looking.

Finding the clients connected to a server

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