How to handle muliple request

Question

Hi all,
I'm having with some issue of socket server programming.
In fact, this is switch which is used for routing banking transactions to regarding banking server.
[Transaction initiator POS ]-----tcpip connection---->[hardware unit NAC]-----------tcpip connection------->[MY server SWITCH]---------tcpip---->[Banking server]
I'm developing SWITCH part. so it is listening some port for incoming request from NAC and
after processing the request I will read that data to the banking server.
In additionally, when the system is up, the connection in between NAC and SWITCH has already established.
problem is
When the NAC is receiving multiple transactions at the same time, SWITCH can be handled the load
can you give me an idea what i can do for it ?
my some coding so far ,
public class Server implements Runnable{
     public static void main(String[] args) throws Exception{
          new Thread(new Server()).start();
     public void run() {
          while (true) {
               try {
                    Socket client = service.accept();
                    client.setKeepAlive(true);
                    SessionRunner ses = new SessionRunner(client);
                    new Thread(ses).start();
               } catch (Exception e) {
                    LogFileCreator.writErrorTologs(e);
public class SessionRunner extends HelperMethodFortxn implements Runnable {
     public SessionRunner(Socket clients) {
          client                     = clients;
     public void run() {
          while (true ) {
               try {
                    synchronized(this) {
                         in = new DataInputStream(client.getInputStream());
                         out = new DataOutputStream(client.getOutputStream());
                         in.read(header, 0,InitConfigurations.POS_HEADER_SIZE);
                         in.read(request, 0,InitConfigurations.POS_PACKET_SIZE);
                         SessionFactory.findProcessRunner(request, con);
                         byte response[] =getNacResponse(SessionFactory.getResponse());
                         out.write(response);
                         out.flush();
               } catch (SocketException e) {
                    LogFileCreator.writErrorTologs(e);
I think that I should implement some process for coming request to queue on "SessionRunner" class
Hope soon reply
Kapila

Answer 1

problem is
When the NAC is receiving multiple transactions at the same time, SWITCH can be handled the load I don't understand this sentence.
can you give me an idea what i can do for it ?Please restate the problem in standard English.
                    Socket client = service.accept();
                    client.setKeepAlive(true);Don't do anything with the socket in the accept thread. Move the setKeepAlive() call into the thread's run() method.
     public SessionRunner(Socket clients) {
          client                     = clients;Here you should call setKeepAlive() etc and also construct the input and output streams. Presently you're doing that every time around the loop, which is wasteful at best and erroneous at worst.
                         in.read(header, 0,InitConfigurations.POS_HEADER_SIZE);Here you are ignoring the result of the read() method. Don't do that.
                         in.read(request, 0,InitConfigurations.POS_PACKET_SIZE);Ditto.
               } catch (SocketException e) {
                    LogFileCreator.writErrorTologs(e);
               }You don't seem to be catching IOException, which can't be correct as your code wouldn't compile. If you get any exception other than SocketTimeoutException you should close the socket and exit the loop.
I think that I should implement some process for coming request to queue on "SessionRunner" class Why?