Client/Server between iPhones

Hi all,
I have to develop a networking component for multiplayer games on iPhone. I wondered about the possibility to build a client/server achitecture over bluetooth between two or more iPhones, and if it was possible using CFSocket, CFNetwork classes ? Or are there other useful classes ?
Thank you.

To enable cross release client/server operation you need to add the line
-insecure-backwards-compat
to the ttendaemon.options file located in <tt_install_dir>/info on the system that hosts the datastores that you wish to connect to. For this to take effect you must restart the main daemon so you will need to shutdown all the datastores before doing this!
This is documented in the TimesTen Installation Guide and the Timesten operations Guide.
Regards,
Chris

Similar Messages

2 clients communicates between them through a server

Hy. I am building a client server application with multiple clients. How can I make this: clients communicates between them through a server.Anyone can give me an idea???Or some help??Please

killer8685 wrote:
Yes I know how to send message from server to client, and know how to send from client to server, but i don't know how to send from server to a different client, not to that who sent a message to server.Can u help??The server has a list of clients (sockets and outputstreams), right?
Let's make it easy and send the message to all connected clients, that means that the one that sent the message also will get it. That means that the server should iterate over the list of clients (outputstreams or whatever you have) and send the message to all of them.

Interesting difference in Menus between 6i (client-server) and 10g (web)

I just noticed an interesting difference between Forms 6i (client-server) and 10g (web forms). Perhaps you know a work around.
We have an oracle form with a customized menu attached. The main body of the application displays nothing so we shrunk the application window down to the tiny window possible just leaving the 3 or 4 drop down menu visible. So it was basically this little floating toolbar where users could pull down a menu and select an oracle form to open.
The difference is that in 10g Web Forms when the pull down menu is accessed, the list of selectable items is contained within the FORMS_MDI_WINDOW (or the IE window). So if the list is long then the drop down list shows a small arrow at the top and bottom that forces you to scroll thru the remaining items in the menu.
Whereas in 6i, when the menu was access the contents of the menu would show in full. Even if it meant expanding the menu beyond the FORMS_MDI_WINDOW.
Does anyone know if I'm stuck with this functionality? If I'm stuck it will mean I need to make my little menu application full screen so that users can see all the items in a menu without having to scroll thru choices using these little arrows.
Any help or insights would be greatly appreciated!

This is a consequence of the client being Java. When you run a Java application in a browser it cannot draw outside the browser window area. It's fully contained within the browser in every sense. That is by design.
There is no way to get around this that I know of.

Client/Server connection between unix machines

Hi,
I have a problem about connectivity.
When I try connect to a dsn in a server from a machine with client TimesTen software installed.
Details:
CLIENT1: TimesTen Release 7.0.5.0.0 (32 bit Solaris/x86) (tt705) 2008-04-04T00:06:33Z
SERVER1: TimesTen Release 7.0.3.0.0 (32 bit Solaris) (tt703:17000) 2007-09-12T05:45:43Z
SERVER2: TimesTen Release 7.0.3.1.0 (32 bit Solaris) (tt703:17000) 2007-10-30T22:52:42Z
SERVER3: TimesTen Release 7.0.3.1.0 (32 bit Solaris) (smpcluster:15000) 2007-10-30T22:52:42Z
connections CLIENT1 --> SERVER1 ==> OK
connections CLIENT1 --> SERVER2 ==> KO
connections CLIENT1 --> SERVER3 ==> KO
user@CLIENT1 > ttIsqlcs ngincz_prod_s3scp03
Copyright (c) 1996-2008, Oracle. All rights reserved.
Type ? or "help" for help, type "exit" to quit ttIsql.
All commands must end with a semicolon character.
connect "DSN=ngincz_prod_s3scp03";
S1000: Protocol mismatch; client protocol: 32, server protocol: 32
S1010: Function sequence error
The command failed.
Done.
In error log file server we can see these messages:
11:44:50.42 Err : SRV: 14749: EventID=37| Client version 32 is not supported, the current server version is 31. Contact TimesTen support for instructions on how to download new versions of TimesTen Client/Server
11:44:50.42 Err : SRV: 14749: EventID=68| Failed to read request from client. Closing connection without reply.
Any idea about cause/solution ??

To enable cross release client/server operation you need to add the line
-insecure-backwards-compat
to the ttendaemon.options file located in <tt_install_dir>/info on the system that hosts the datastores that you wish to connect to. For this to take effect you must restart the main daemon so you will need to shutdown all the datastores before doing this!
This is documented in the TimesTen Installation Guide and the Timesten operations Guide.
Regards,
Chris

Client/server program validation - is it possible?

I've been mulling over this problem for a few days, and am starting to wonder if it's theoretically possible to find a solution. I'm not looking for specific code, this probably won't even be implemented in Java, I'm just wondering if there is a theoretical program model that would work in this situation.
The short version:
Validate the data generated by a client program, without knowing the original data.
The long version:
This is a "profiling" system for a MMOG (Massively Multiplayer Online Game). The MMOG is an internet based client/server graphical program where each client connects to the server and they interact with each other and the virtual world. They pay a monthly fee for access to the game. My program is not affiliated with the MMOG or its makers. I have no connections inside the company and cannot expect any cooperation from them.
The "profiling" system is also a client/server model. The client program runs in the background while the MMOG client is active. It accesses the memory of the MMOG client to retrieve information about the player's character. Then, possibly on request or maybe immediately, it sends the character data to our server.
What I want to validate is that the character data being sent is unmodified and actually comes from the MMOG program.
I can reasonably expect that with mild encryption and some sort of checksum or digest, the vast majority of problems can be avoided. However, I am not sure it's possible to completely secure the system.
I assume that the user has access to and knowledge of the profiler client and the MMOG client, their assembly code, and the ability to modify them or create new programs, leveraging that knowledge. I also assume that the user does not have access to or knowledge of either of the server applications - the MMOG server or mine.
In a worst-case scenario, there are several ways they could circumvent any security I have yet been able to think of. For instance, they could set up a fake MMOG client that had the data they wanted in memory, and let the profiler access that instead of the real thing. Or, they could rewrite the profiler to use the data they wanted and still encrypt it using whatever format I had specified.
I have been considering using some kind of buffer overflow vulnerability or remote execution technique that would allow me to run specific parts of the client program on command, or get information by request, something that could not be anticipated prior to execution and thus could not be faked. But this seems not only insecure for the client but also not quite solid enough, depending on how it was implemented.
Perhaps a series of apparently random validation codes, where the client does not know which one actually is doing the validation, so it must honor them all. Again, this is very conceptual and I'm sure that I'm not explaining them very well. I'm open to ideas.
If I don't come up with anything better, I would consider relying on human error and the fact that the user will not know, at first, the relevance of some of the data being passed between client and server. In this case, I would include some kind of "security handshake" that looks like garbage to the client but actually is validated on the server end. A modified program or data file would result in an invalid handshake, alerting the server (and me) that this client was a potential problem. The client would have no idea anything had gone wrong, because they would not know what data the server was expecting to receive.
I hope I have not confused anyone too much. I know I've confused myself....

Yes, that is the general model for all MMOGs these days - no data that can actually affect the game is safe if loaded from the client's computer. All character and world data is sent from server to client and stored in memory. Any information that is saved to the client's computer is for reference only and not used by the game engine to determine the results of actions/events etc.
My program accesses the MMOG client's memory while the game is running, and takes the character information from there. It does not have direct access to the MMOG server, and does not attempt to modify the data or the memory. Instead, it just encrypts it and sends it to our server, where the information is loaded into a database.
The security issue comes into play because our database is used for ranking purposes, and if someone were to hack my program, they could send invalid data to our servers and affect the rankings unfairly.
I'm just trying to think of a way to prevent that from happening.

Client-Server - SOA.... Is it really a transition or a big development ?

Hi,
In all sources related to SOA/ESA by SAP, it is said that, transitioning from Client-Server Arch(CSA) to SOA is the same as transitioning from Mainframe systems to Client-Server Arch.
If we think about Mainframe and CSA, it is obvious that there had been big differences in that transition. Such as, the INTELLIGENT CLIENT concept had appeared to replace the DUMMY CLIENTS, so this had changed the way of IT Business. There would be a main application providing several functionalities(server) and other applications which want to use those functionalities (clients) would connect to the server using some functionalities on its own (that means a client appliction should also have some functionalities in order to at least connect to the server, so that made them different from the DUMMY clients of the mainframe era)
Now, when I look at the differences between SOA and CSA, I cannot see that incompareble differences.Why ? Let me explain :
- One of the most important differences between SOA and CSA is, SOA is vendor and platform independent, so that any application can call any applications functionality as long as they are using Web Services. That is true. But the question arises here : It is still the case that someone is calling some others' functionalities (services), so there is still a client/server mentality, isn't there and We will still be using several client/server programming languages in order to realize the main functionality of the web services but this will be transparent to the user and the integration. The main difference is, SOA is vendor and platform independent. But I don't think this can be commented as a missing feature of CSA. Because the aim of CSA was to make the clients more intelligent and not to make them vendor/platform independent. And also architectures like CORBA and DCOM have also tried to achieve that independency (even though they have restrictions compared to Web Services, one of the main reasons for this is using Web as a transport/communication protocol) but they are still treated as some extensions on top of CSA because they are using CSA beneath. But if we compare Mainframes and CSA, even though I haven't seen manframe ages, I think it is clear that CSA does not use any architectural functionality of Mainframes. They are completely different.. But is SOA and CSA completely different ?
I agree with all reasons why today business needs sth more agile, more flexible and it is becoming clearer day by day that SOA and Web Services provides this environment, BUT, I still cannot make it clear, WHY it is accepted as a transition from CSA and why it is not treated as a big development over CSA while using the main features of it.
Any comments will be appreciated.
Regards
Ahmet Engin Tekin

Good point..Actually those are the things clearly known but it becomes a bit confusing to build clear sentences when it comes to declare the differences. Anyway, here are my additions :
- Mainframes were centralized systems which had their own hardware architecture as well. All processes/applications were running on 1 central DB/system and everyone in the company had to use the same functionality and interface.
- In time, as a result of business demand, people needed different functionalities/applications regarding different business needs. This could either be done by extending the higly-costed big mainframe systems/softwares OR a new approach had to be developed in order to solve those problems. At this point, (thanks to IBM,Macintosh and Xerox) PC and ethernet concepts had emerged. That was a completely different hardware architecture which allowed less costly systems and also distributing the process load and/or applications to different systems in one landscape (app servers, intelligent clients - 2 tier, 3- tier arch.). Thus, while those were happening on harware side, new communication and programming models/languages emerged on software side. As a result, people started using different applications on different systems according to their needs and thus an efficient solution had been provided to the business need (described above).
To criticise, this was really a big transition. Not only software concepts but also hardware concepts are also changed drastically. Actually, it is not wrong if we say, developments on the hardware side, allowed changes on the software side
- What happened next ? Companies started using so many different applications by different vendors with different business logic and programming models (thanks to CSA). But in times, this has emerged the biggest problem of the CSA era : Integration.
We all know the rest. "Web Services" concept emerged with SOA as well. So that, the boundaries between the systems began to disappear.
So, is this a transition ? Well, yes it is.. The point that made it confusing (at least for me) is that this time there is no hardware transition (yet) but only a transition in software side. But I still insist that the IT transition during Mainframe->CSA was like a revolution (forget what you've left behind) but from CSA to SOA; it is more likely to be an evolution (the next best thing)
Anyone have more comments ?
Regards,
Ahmet

Servlet in client/server application?

hi,
I am planing to make a client server application( SWING & an OODB), would it be clever to use servlet ( not httpservlet) as midle tier framework?
If yes , what are the benefits?
Thanks.

thanks for responding
actually my client don't wanna run a separate server application on the hosting machine as it costs too much, so thats why i think there is no other way to achieve the task rather than using servlets.
please do help me or atleast give me a suggestion. actually i'm developing an internet messenger application. i have developed it using client/server application model in which both (the swing client and the server) uses java sockets to communicate with each other. but now i want to develop the server side of the messenger as servlets. but as far as i know the servlets follow the request/response model. if i follow that model i have to use some sort of client pull after certain amount of time say after five or ten seconds, and this approach does not fulfill my requirements as it would slow the performance if there are hundreds of clients calling the servlet every 5 seconds. thus i want to create persisted connections between the client and the servlet which last for the life time of the user's session. also it is important for the data integrity of the application, so please help me in this matter as i have no other source of guidence in this meany world. i hope you will certainely help me in this matter. please mention that if there are any drawbacks of my approach i mean the persisted connections.
thanks you a lot
Best reagrds
Imran Sarwar.

How to minimize Client-Server Round-trip in ADF Faces application ?

Hi All,
We have just finished POC on our prototype of ADF Faces + ADF BC application. The POC Emphasizes on Bandwidth requirement.
After receing the result from the communication provider, including : TCP packets send, Bytes sent from/to server and number of Client-Server Round-Trip.
There are several part of the application that Must be tuned for the application to run on acceptable performance.
Here is some page/ function that should be tuned :
- First page, ADF Read Only Table with two images and some buttons, cause 5 round-trip
- ADF Dialog Returning Value (as LOV), cause 4 Round-trips
- On ADF Form, press Commit button, cause 3 Round-trips.
So the question is :
1) How to reduce round-trips on ADF Faces application ?
2) How to minimize the bytes send from / To server on a specific user action ?
Please give me some recommendation..
Thank you very much,
xtanto

Hi Frank and Steve,
Thank you for your reply.
Yes Frank, what I mean by Round-Trip is the traffic between Client and the Server. And Yes, we will use VSAT where the latency is 1 - 1.5 second, so that round-trip matters significantly.
What I will do is :
- use minimal skin and No image at all
- don't use Dialog for LOV because it requires AutoSubmit there.
- Use 'Apply-Changes' button to do server-side validation before Commit.
Then do the POC / testing again.
Thank you,
xtanto

FRM-40735 on the Web, in client/server without error

We have 2 types of Form modules.
Type 1 are simple multirecord modules,
which uses PL/SQL library module PL1.plx.
Type 2 are complex (master-detail) modules,
which uses PL/SQL library module PL2.plx.
In client/server, both types of Form modules work fine.
On the Web (Intranet), type 1 modules works fine, but loading of type 2 modules finishes with error: FRM-40735 PRE-FORM trigger raised unhandled exception ORA-06508.
In both cases database schema and fmx/plx modules are the same.
Implementation of WebForms is noncartridge
(without Oracle Application Server).
Clients use Jinitiator and IE4.
Forms version is 5 + patch 7.
DBMS version is 7.3.4.0.
Thanks and regards.

Two questions:
Are you running your application against one DB, while it was compiled against another?
If any of your forms or libraries is calling DB stored package that are passing parameters in between database and modules?
If the answer to both questions is yes, then you're dealing with Oracle bug. Oracle support points to interaction between forms
PL/SQL 8.0.5.1.0 and database PL/SQL 2.3.4.
This problem should be fixed in the forms
PL/SQL 8.1.6 which is not available at present time. The only work around is to maintain forms executable and/or compiled libraries for each of your DB.
Good luck.
null

Applet socket problem in client-server, urgent!

Dear All:
I have implemented a client server teamwork environment. I have managered to get the server running fine. The server is responsible for passing messages between clients and accessing Oracle database using JDBC. The client is a Java Applet. The code is like the following. The problem is when I try to register the client, the socket connection get java.security.AccessControlException: access denied(java.net.SocketPermission mugca.its.monash.edu.
au resolve)
However, I have written a Java application with the same socket connection method to connect to the same server, it connects to the server without any problem. Is it because of the applet security problem? How should I solve it? Very appreciate for any ideas.
public class User extends java.applet.Applet implements ActionListener, ItemListener
public void init()
Authentication auth = new Authentication((Frame)anchorpoint);
if(auth.getConnectionStreams() != null) {
ConnectionStreams server_conn = auth.getConnectionStreams();
// Authenticates the user and establishes a connection to the server
class Authentication extends Dialog implements ActionListener, KeyListener {
// Object holding information relevant to the server connection
ConnectionStreams server_conn;
final static int port = 6012;
// Authenticates the user and establishes connection to the server
public Authentication(Frame parent) {
// call the class Dialog's constructor
super(parent, "User Authentication", true);
setLocation(parent.getSize().width/3, parent.getSize().height/2);
setupDialog();
// sets up the components of the dialog box
private void setupDialog() {
// create and set the layout manager
//Create a username text field here
//Create a password text field here
//Create a OK button here
public void actionPerformed(ActionEvent e) {
authenticateUser();
dispose();
// returns the ConnectionStreams object
public ConnectionStreams getConnectionStreams() {
return(server_conn);
// authenticates the user
private void authenticateUser() {
Socket socket;
InetAddress address;
try {
// open socket to server
System.out.println("Ready to connect to server on: " + port);
socket = new Socket("mugca.its.monash.edu.au", port);
address = socket.getInetAddress();
System.out.println("The hostname,address,hostaddress,localhost is:" + address.getHostName() + ";\n" +
address.getAddress() + ";\n" +
address.getHostAddress() + ";\n" +
address.getLocalHost());
catch(Exception e) {
displayMessage("Error occured. See console");
System.err.println(e);
e.printStackTrace();
}

Hi, there:
Thanks for the help. But I don't have to configure the security policy. Instead, inspired by a message in this forum, I simply upload the applet to the HTTP server (mugca.its.monash.edu.au) where my won server is running. Then the applet is download from the server and running fine in my local machine.
Dengsheng

Developer 6.0 - Client/server mode

Assuming I have an application server between the front and back ends, what needs to be running in the middle tier, if I am running strictly client/server ?

It's, first, a problem of client power. On 3 tier, the client needs to do nothing else except run the web browser; the PL/SQL code in forms/reports running on the application server. So, a 3rd tier client might be even an old 486, while a pure client-server would have to be Pentium, preferably 64 MB RAM, have enough disk space for the application and have Forms & Reports runtime installed.
Then, there is a matter of network communication: an application server could accomodate more clients than classic client-server.

Why timesten is slow in client/server mode

i am testing Timesten client/server mode and find that
it is to slow.
when using dircet mode, timesten can precoss about 40000 query pre second
but when change to client/ server mode
it can only process 1500 query pre second.
here is my config and test sql.
[Test_tt702]
Driver=//u01/oracle/TimesTen/tt70/lib/libtten.a
DataStore=//u01/oracle/TimesTen/tt70/info/DemoDataStore/Test_tt702
DatabaseCharacterSet=US7ASCII
TempSize=64
PermSize=250
Temporary=1
TypeMode=1
CREATE TABLE TEST999
A1 number NOT NULL PRIMARY KEY ,
A2 number,
A3 number
network card is 1000m,
query code:
PreparedStatement pSel = dbConn.prepareStatement("select a1,a2 from TEST999 where a1=?");
rs = null;
int a1=0;
int a2=0;
for(int i=0;i<80000 ;i++)
     pSel.setInt(1,i );
rs=pSel.executeQuery( );
if (rs.next()) {
     a1 = rs.getInt(1);
     a2 = rs.getInt(2);
     if( i%8000==0) {
     System.out.println("select "+ i +" res="+a1 +" time " + getTime_v2());
     rs.close();
direct mode time : 80000 query is 2 second
client/server mode in the same machine : 80000 query is 12 second
client/server mode in the different machine : 80000 query is 54 second
any one have idea about this?
is it the jdbc driver 's promble?

it is to be expected that there will be a big difference in performance between direct mode and client/server due to much greater overhead in client/server, especially if the client is on a different machine. However, the differences you are seeing here are larger than I would normally expect.
You say (I think) that the network is 1 GB, correct? What is the hardware spec of the test machine(s)? Have you tuned the O/S network stack for optimal performance?
Typically, for local client/server using the fastest IPC mode (shmipc) I expect performance of around 20-30% of direct mode and for remote client/server with a GB LAN I would expect performance of around 10-20% of direct mode.
Chris

Client/server socket based application

hi does anyone have example of client/server socket based application using Spring and Maven
where application do the following
Client sends a request with a path to any file on the server
„h Server reads the file and responds back with the content
„h Client outputs the content to the console
am trying to follow this
http://www2.sys-con.com/itsg/virtualcd/java/archives/0205/dibella/index.html
http://syntx.io/a-client-server-application-using-socket-programming-in-java/
am using java 6

i have attempt code but i wht to do the following
client/server socket based application that will read the content of a file and stream the content of the file to the client. The client must simply output the content of the file to the console using System.out. The client must be able to run in a standalone mode (non-network mode) or in a remote mode.
Additionally the client must be designed in a way that i can print the output to a console but must be interchangeable where if requirements change i can persist the response to file or persist the response to a database.
/* Server.java*/
///ifgetBoolen= true then...
import java.io.*;
import java.net.*;
import java.util.*;
import java.sql.*;
public class Server
    static String array[][];
    // STEP 1 a1
    // Server socket
    ServerSocket listener;
    // STEP 1 a2 Client connection
    Socket client;
    ObjectInputStream in;
    ObjectOutputStream out;
    public void createConnection() throws IOException
            System.out.println("\nSERVER >>> Waiting for connection.....");
            client = listener.accept();
            String IPAddress = "" + client.getInetAddress();
            DisplayMessage("SERVER >>> Connected to " + IPAddress.substring(1,IPAddress.length()));
      public void runServer()
        // Start listening for client connections
        // STEP 2
        try
            listener = new ServerSocket(12345, 10);
            createConnection();
              // STEP 3
//              processConnection();
        catch(IOException ioe)
            DisplayMessage("SERVER >>> Error trying to listen: " + ioe.getMessage());
    private void closeConnection()
        DisplayMessage("SERVER >>> Terminating connections");
        try
            if(out != null && in != null)
                  out.close();
                in.close();
                client.close();
        catch(IOException ioe)
            DisplayMessage("SERVER >>> Closing connections");
    public static void define2DArray(ResultSet RS, int Size)
        try
            ResultSetMetaData RMSD = RS.getMetaData();
            DisplayMessage("SERVER >>> Requested arraySize: " + Size);
            if (RS.next())
                array = new String[Size][RMSD.getColumnCount()];
                for (int Row = 0; Row < Size; Row++)
                    for (int Col = 0; Col < RMSD.getColumnCount(); Col++)
                        array[Row][Col] = new String();
                        array[Row][Col] = RS.getString(Col+1);
                        DisplayMessage(array[Row][Col] + " ");
                    RS.next();
            else
                array = new String[1][1];
                array[0][0] = "#No Records";
        catch (Exception e)
            DisplayMessage("SERVER >>> Error in defining a 2DArray: " + e.getMessage());
    public static void DisplayMessage(final String IncomingSMS)
        System.out.println(IncomingSMS);
//client
* @author
import java.io.*;
import java.net.*;
import javax.swing.*;
public class ClientSystem
    static Socket server;
    static ObjectOutputStream out;
    static ObjectInputStream in;
    static String Response[][];
    static boolean IsConnected = false;
    static int Num = 0;
    public static void connectToServer() throws IOException
        server = new Socket("127.0.0.1", 12345);
//        server = new Socket("000.00.98.00", 12345);
        String IPAddress = "" + server.getInetAddress();
        DisplayMessage("\nCLIENT >>> Connected to " + IPAddress.substring(1,IPAddress.length()));
    public static void getStreams() throws IOException
        out = new ObjectOutputStream(server.getOutputStream());
        out.flush();
          in = new ObjectInputStream(server.getInputStream());
          IsConnected = true;
          DisplayMessage("CLIENT >>> Got I/O streams");
    public static void runClient()
        try
            connectToServer();
            getStreams();
              DisplayMessage("CLIENT >>> Connection successfull....\n");
              DisplayMessage("CLIENT >>> Want to talk to server");
        catch (IOException ioe)
            System.out.print("."+Num);
            Num++;
    public static void closeConnection()
        try
            out.close();
            in.close();
            server.close();
        catch(IOException error)
            DisplayMessage("CLIENT >>> Could not close connections");
    public static void Start()
        System.out.print("\nCLIENT >>> Attempting connection.....");
        try
            IsConnected = false;
            while (IsConnected == false)
                runClient();
                if (IsConnected == false)
                    Thread.sleep(100);
        catch (Exception e)
            DisplayMessage("CLIENT >>> Attempting connection.....");
    public static String sendSMS(String sms)
        Response = new String[0][0];
        try
            DisplayMessage("CLIENT >>> " + sms);
            out.writeObject(sms);
            out.flush();
            Response = (String[][])in.readObject();
            DisplayMessage("CLIENT >>> Waiting for server to respond...");
            for (int Row = 0; Row < Response.length; Row++)
                System.out.printf( "_SERVER >>> \t");
                for (int Col = 0; Col < Response[Row].length; Col++)
                    //DisplayMessage( "_SERVER >>> " + Response[Row][Col] + " ");
                    System.out.printf( "%s\t", Response[Row][Col]);
                System.out.println();
            DisplayMessage("CLIENT >>> Query processed successfully....\n");
        catch(ClassNotFoundException cnfe)
            DisplayMessage("CLIENT >>> Class not found for casting received object");
        catch(IOException ioe)
            reConnect();
        catch (Exception sqle)
            DisplayMessage("CLIENT >>> Error sending query ??? " + sqle.getMessage());
        return "transmission successfull";
    public static void reConnect()
        try
            DisplayMessage("CLIENT >>> Connection was lost. Trying to reconnect...");
            closeConnection();
            Thread.sleep(100);
            IsConnected = false;
            while (IsConnected == false)
                runClient();
                Thread.sleep(200);
        catch (Exception e)
            DisplayMessage("CLIENT >>> Error trying to Re-Connect...");
    public static void DisplayMessage(final String IncomingSms)
        System.out.println(IncomingSms);
    System.out.printf("Isms: %s", IncomingSms); ///naah.
    public static String[][] getResponse()
        return Response;
    public static String getResponse(int row, int col)
        return Response[row][col];
how can i do below using above code
The program must be able to work in a non-networked mode. In this mode, the server and client must run in the same VM and must perform no networking, must not use loopback networking i.e: no “localhost” or “127.0.0.1”, and must not involve the serialization of any objects when communicating between the client and server components.
The operating mode is selected using the single command line argument that is permitted.
imust use a socket connection and define a protocol. networking must be entirely bypassed in the non-network mode.

Establish a connection through RF modem's on client & server side & to set up PPP communication for data transfer

hi
can any1 over here help me out in how to establish connection between 2 RF modem's for data transfer , between client & server USing LABVIEW?
I want to establish a connection between 2 PC's through RF modem on client & server side & to set up PPP communication for data transfer.
(I have tried data transfer through RS-232 using TCP/IP whn the 2 PC's are connected over ethernet... which is working.
I also tried connecting loopback cable between 2 PC's COM port & geting data transfer using VIsa configure serial port & other visa functions ... which is working)
can u guide me how to establish connection between 2 RF modem's using LABview?
& how does the data transfer take place between 2 RF modems through RS-232?
is it using TCP/IP?
If you got any links to go abt this issue do send me related links .. or any examples .....
I am currently using Labview version 8.
Waiting in anticipation.. reply ASAP..
thanking you
Regards
Yogan..

Howdy yogan,
Maybe you could clarify a few things for me, and we'll see how we can help ya. TCP/IP protocol occurs through an ethernet connection; RS-232 communication occurs through an RS-232 serial connection, typically through a cable that has a DB9 connector on both ends. Do you mean that the RF modems in question have the option to communicate via RS-232 and/or via TCP/IP ethernet? Specific information like the manufacturer of your RF modems, the model number of your RF modems, and how you connect the modems to the PC would enable us to give you more efficient support.
You can check our Instrument Driver Network (IDNet) to see if a plug-and-play/IVI driver already exists for your RF modem. (You'll need to know its manufacturer and model number.) In the case that you do find an IDNet driver for your modem, you can use this KnowledgeBase article for instructions on how to use the driver.
Another excellent resource to consider is the NI Example Finder. You can access this within LabVIEW by navigating to Help»Find Examples and then searching for serial or TCP/IP examples.
Message Edited by pBerg on 03-10-2008 04:35 PM
Warm regards,
pBerg

Pro*C using client server and the sqlca - any takers

Hi all
This is my 1st post and it's about Pro*C.
At work, we are porting our Pro*C apps from VMS to XP/NT. Has anyone done this before, anything to be aware of?
Also am planning a client/server architechture for my next project, but with Pro*c, and am concerned about the conficts of using the sqlca between child processes...any ideas/suggetions?

Don't cross post
[http://forums.sun.com/thread.jspa?threadID=5384591&messageID=10700568#10700568]

Client/Server between iPhones

Similar Messages

Maybe you are looking for