How to send echo msg to client after regular time to verify the client

Question

Hi
I have socket program which used for communicating information. tow part client and server.
I am having problem. that is I want to send a msg to client (like echo) after some time duration. so how to do that?
help
Kapila

Answer 1

This is the run method of inner class. when the sever is ideal, the sever has to send the msg to client. I think that I want to declare the this part "byte[] b = byteConcatenate(header, responsefornac,response.length); and out.write(b);" elsewhere. first I want to check the server is ideal then if it is ok, send the msg to client.
problem is how to recognise the client?
          * Description : This inner class is used for handling the client session
     protected class SessionPda implements Runnable
//********************************** DECLARATION OF COMMON VARIABLES ******************************************
     protected     byte[]      request;
     protected     byte[]      response;
     protected      byte[]      header;
     protected      byte[]      requestforserver;
     protected      byte[]      responsefornac;
     protected      Socket      client               ;
//********************************** DEFINE CONSTRACTOR********************************************************
          * Description : This method is using for getting the opening client socket
          * @param e
     public SessionPda(Socket client)
     try
     this.client      =      client;
     catch (Exception e)
          System.out.println(">>>>>>>>>>>>>> This is error is occured when getting the opened clint socket at the inner sessionpda class in serve.>>>>>>>>>>>>>>>>>");
               SysLog.logError(java.util.logging.Level.SEVERE, this.toString(), "Sessionpda()", StackTraceUtil.getStackTrace(e));
     header                     =      new byte[HEADER_SIZE];
     request                =      new byte[PACKET_SIZE];
     response                =      new byte[PACKET_SIZE];
     requestforserver      =      new byte[PACKET_SIZE];
     responsefornac           =      new byte[PACKET_SIZE];
//********************************** OVERRIDING THE RUN METHOD IN JAVA LANG THREAD ****************************************************
          * Description : The proccessing the cliet sessionpda
          * @param request
          * @param respons
          public void run()
          try
               while (true)
                    in     =     new     DataInputStream(client.getInputStream())     ;
                    out     =     new DataOutputStream(client.getOutputStream())     ;
               //PRINTING THE REQUEST INFO-----------------------------------
                    int     len     =     in.read(request,0,PACKET_SIZE)                    ;
                    String recvString = "";
     for (int i = 0; i < len; i++)
          recvString +=adjustString(Integer.toHexString( (int) (request)));
     // System.out.println("Request Information :"+recvString);
     //PEPARING TO TO PRCESS--------------------------------------
     for (int j = 0; j < PACKET_SIZE - 3 ; j++)
               requestforserver[j] = request[j + 3];
     Process p = ProcessFactory.getProcess(request);
     boolean redo = p.doProcess();
     ISOMsg m = new ISOMsg();
m = p.getResponse();
m.setPackager(new ISO87BPackager());
response = m.pack();
//PEPARATRING TO SEND BACK THE RESPOND----------------------
header[1] = (byte) (response.length + 5);
          header[3] = (byte) 00;
          responsefornac[0] = (byte) Integer.parseInt(NII.substring(1,3),16); //17;
          for (int k = 0; k < response.length; k++)
               responsefornac[k + 1] = response[k];
          byte[] b = byteConcatenate(header, responsefornac,response.length);
          out.write(b);
          out.flush();
String sendinString = "";
for (int i = 0; i < response.length + 5; i++)
     sendinString +=
          adjustString(Integer.toHexString( (int) (b[i])));
SysLog.logInfo(java.util.logging.Level.INFO,"Response \n"+ sendinString);