TAO/examples/Simple/time/Time_Client.java

   1 // ============================================================================
   2 //
   3 // = LIBRARY
   4 //    TAO/examples/Simple/time
   5 //
   6 // = FILENAME
   7 //    Time_Client.java
   8 //
   9 // = DESCRIPTION
  10 //    This class implements a Java client interface to the Time example.
  11 //
  12 // = AUTHOR
  13 //   Martin Krumpolec <krumpo@pobox.sk>
  14 //
  15 // ============================================================================
  16
  17 import JACE.Misc.GetOpt;
  18 import org.omg.CosNaming.*;
  19 import org.omg.CORBA.*;
  20 import java.io.*;
  21
  22 public class Time_Client
  23 {
  24     private ORB orb = null;
  25     private org.omg.CORBA.Object timeRef = null;
  26     private boolean shutdown = false;
  27     private boolean use_naming_service = false;
  28     private String ior_file = null;
  29     private String ior = null;
  30
  31     Time_Client (String args [])
  32     {
  33         orb = ORB.init (args, null);
  34         parse_args (args);
  35     }
  36
  37     private void parse_args (String args[])
  38     {
  39         GetOpt getopt = new GetOpt (args, "k:f:xn");
  40
  41         int ch = -1;
  42
  43         while ((ch = getopt.next ()) != -1)
  44             {
  45                 switch (ch)
  46                     {
  47                     case 'k':
  48                         ior = getopt.opt_arg () ();
  49                         break;
  50                     case 'f':
  51                         ior_file = getopt.opt_arg () ();
  52                         try
  53                             {
  54                                 java.io.FileInputStream file =
  55                                     new FileInputStream(ior_file);
  56                                 java.io.BufferedReader myInput =
  57                                     new BufferedReader
  58                                         (new InputStreamReader (file));
  59                                 ior = myInput.readLine();
  60                             }
  61                         catch (Exception e)
  62                             {
  63                                 System.out.println ("Error: " + e);
  64                             }
  65                         break;
  66                     case 'x':
  67                         shutdown = true;
  68                         break;
  69                     case 'n':
  70                         use_naming_service = true;
  71                         break;
  72                     default:
  73                         break;
  74                     }
  75             }
  76
  77         return;
  78     }
  79
  80     private Time get_time_object ()
  81     {
  82         if (ior != null)
  83             {
  84                 org.omg.CORBA.Object objref = orb.string_to_object (ior);
  85                 return TimeHelper.narrow (objref);
  86             }
  87         else
  88             {
  89                 if (use_naming_service)
  90                     {
  91                         // Use multicast to obtain NS handle.
  92                         NS_Resolve ns_resolve =
  93                             new NS_Resolve (null);
  94                         org.omg.CORBA.Object objRef =
  95                             ns_resolve.resolve_name_service (orb);
  96
  97                         // Get the root naming context.
  98                         NamingContext ncRef =
  99                             NamingContextHelper.narrow (objRef);
 100                         System.out.println ("got initial NS reference");
 101
 102                         // Resolve the Object Reference in Naming.
 103                         NameComponent nc =
 104                             new NameComponent ("Time", "");
 105                         NameComponent path[] = {nc};
 106                         try
 107                             {
 108                                 return TimeHelper.narrow (ncRef.resolve (path));
 109                             }
 110                         catch (Exception e)
 111                             {
 112                                 System.out.println ("Error: " + e);
 113                             }
 114                     }
 115             }
 116         return null;
 117     }
 118
 119   public static void main (String args[])
 120   {
 121     try
 122       {
 123         Time_Client client = new Time_Client (args);
 124         Time timeRef = client.get_time_object ();
 125
 126         if (timeRef == null)
 127             {
 128                 System.out.println ("Unable to resolve Time.");
 129                 System.exit (-1);
 130             }
 131
 132         // Call the Time server object and print results.
 133         int time = timeRef.current_time ();
 134
 135         java.util.Date date =
 136           new java.util.Date (((long) time) * 1000);
 137
 138         System.out.println ("string time is " + date);
 139
 140         if (client.shutdown)
 141             {
 142                 timeRef.shutdown ();
 143                 System.out.println ("Shutting down server ...");
 144             }
 145       }
 146     catch (Exception e)
 147       {
 148         System.out.println ("ERROR : " + e) ;
 149         e.printStackTrace (System.out);
 150       }
 151   }
 152 }