client.cpp

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// client.cpp,v 1.25 2003/10/28 18:34:32 bala Exp


// ============================================================================
//
// = LIBRARY
//      TAO/tests/Cubit/TAO/DII_Cubit
//
// = FILENAME
//      client.cpp
//
// = DESCRIPTION
//      This class implements a simple CORBA client of the Cubit
//      interface using DII functionality.
//
// = AUTHOR
//      Jeff Parsons <[e-mail]>
//
// ============================================================================

#include "tao/DynamicInterface/Request.h"
#include "tao/debug.h"
#include "tao/TC_Constants_Forward.h"
#include "ace/Profile_Timer.h"
#include "ace/Get_Opt.h"
#include "ace/Read_Buffer.h"

// Since we don't yet have an interface repository or dynamic-Any, we
// just get the info from the IDL-generated files, since we're mainly
// interested in timing comparisons anyway.
#include "../IDL_Cubit/cubitC.h"

ACE_RCSID(DII_Cubit, client, "client.cpp,v 1.25 2003/10/28 18:34:32 bala Exp")

  // Some constants used below.
const CORBA::ULong DEFAULT_LOOP_COUNT = 250;
const char *DEFAULT_FACTORY_IOR = "ior00";
const int SMALL_OCTET_SEQ_LENGTH = 16;
const int LARGE_OCTET_SEQ_LENGTH = 4096;
const int SMALL_LONG_SEQ_LENGTH = 4;
const int LARGE_LONG_SEQ_LENGTH = 1024;
const int NUMBER_OF_TESTS = 10;

class DII_Cubit_Client
{
  // = TITLE
  //    Defines a class that encapsulates behaviour of a Cubit client
  //    that makes requests using DII rather than stubs.
  //
  // = DESCRIPTION
  //    This class declares an interface to run an example client for
  //    a Cubit CORBA server.  All the complexity for initializing the
  //    client is hidden in the class.  Just the run() interface is
  //    needed.
public:
  // = Constructor and destructor.
  DII_Cubit_Client (void);
  // Constructor.

  ~DII_Cubit_Client (void);
  // Destructor.

  int init (int argc, char **argv);
  // Initialize the ORB and gets the Cubit objref.

  int run (void);
  // Execute client example code.

private:
  int init_naming_service (void);
  // Gets objref through naming service.

  int parse_args (void);
  // Parses the arguments passed on the command line.

  int read_ior (char *filename);
  // Function to read the cubit factory IOR from a file.

  void print_stats (const char *call_name,
                    ACE_Profile_Timer::ACE_Elapsed_Time &elapsed_time);
  // Prints the timing stats.

  // = DII versions of Cubit operations:

  void cube_short_dii (void);
  void cube_long_dii (void);
  void cube_octet_dii (void);
  void cube_union_dii (void);
  void cube_struct_dii (void);
  void cube_octet_seq_dii (int length);
  void cube_long_seq_dii (int length);

  // = Wrappers for cubing small and large sequences w/o args:

  void cube_small_long_seq (void);
  void cube_large_long_seq (void);
  void cube_small_octet_seq (void);
  void cube_large_octet_seq (void);
  void cube_mixin (void);
  // Wrapper for the mixin call, just to be neat.

  void (DII_Cubit_Client::*op_array_[NUMBER_OF_TESTS])(void);
  // Array of pointers to the operation functions.

  static const char *stats_messages_[];
  // Array of labels for passing to print_stats.

  int argc_;
  // # of arguments on the command line.

  char **argv_;
  // arguments from command line.

  CORBA::ULong loop_count_;
  // # of calls in test loop.

  int shutdown_;
  // Flag to tell server to exit.

  CORBA::ORB_var orb_var_;
  // Storage of the ORB reference.

  CORBA::Object_var factory_var_;
  // Storage of the Cubit_factory objref

  CORBA::Object_var obj_var_;
  // Storage of the Cubit objref.

  CORBA::ULong call_count_;
  // # of calls made to functions.

  CORBA::ULong error_count_;
  // # of errors incurred in the lifetime of the application.

  char *factory_IOR_;
  // IOR of the factory used to make a Cubit object.

  FILE *cubit_factory_ior_file_;
  // File from which to obtain the IOR.

  ACE_HANDLE f_handle_;
  // File handle to read the IOR.
};

// Constructor
DII_Cubit_Client::DII_Cubit_Client (void)
  : loop_count_ (DEFAULT_LOOP_COUNT),
    shutdown_ (0),
    orb_var_ (0),
    factory_var_ (CORBA::Object::_nil ()),
    obj_var_ (CORBA::Object::_nil ()),
    call_count_ (0),
    error_count_ (0),
    factory_IOR_ (CORBA::string_dup (DEFAULT_FACTORY_IOR))
{
  // Initialize the array of pointers-to-member-functions.
  this->op_array_[0] = &DII_Cubit_Client::cube_short_dii;
  this->op_array_[1] = &DII_Cubit_Client::cube_octet_dii;
  this->op_array_[2] = &DII_Cubit_Client::cube_long_dii;
  this->op_array_[3] = &DII_Cubit_Client::cube_struct_dii;
  this->op_array_[4] = &DII_Cubit_Client::cube_union_dii;
  this->op_array_[5] = &DII_Cubit_Client::cube_small_long_seq;
  this->op_array_[6] = &DII_Cubit_Client::cube_large_long_seq;
  this->op_array_[7] = &DII_Cubit_Client::cube_small_octet_seq;
  this->op_array_[8] = &DII_Cubit_Client::cube_large_octet_seq;
  this->op_array_[9] = &DII_Cubit_Client::cube_mixin;
}

// Destructor
DII_Cubit_Client::~DII_Cubit_Client (void)
{
  CORBA::string_free (this->factory_IOR_);
}

// An array of messages to pass to print_stats, so we can step through
// this along with op_array_.
const char *DII_Cubit_Client::stats_messages_[] =
{
  "DII cube_short",
  "DII cube_octet",
  "DII cube_long",
  "DII cube_struct",
  "DII cube_union",
  "DII cube_small_sequence<long>",
  "DII cube_large_sequence<long>",
  "DII cube_small_sequence<octet>",
  "DII cube_large_sequence<octet>",
  "DII cube mixin (short/octet/long)"
};

int
DII_Cubit_Client::init (int argc, char **argv)
{
  // Nice and safe.
  this->argc_ = argc;
  this->argv_ = argv;

  ACE_TRY_NEW_ENV
    {
      // Initialize the ORB.
      this->orb_var_ = CORBA::ORB_init (this->argc_,
                                        this->argv_,
                                        "internet"
                                        ACE_ENV_ARG_PARAMETER);
      ACE_TRY_CHECK;

      // Parse command line and verify parameters.
      if (this->parse_args () == -1)
        ACE_ERROR_RETURN ((LM_ERROR,
                           "%p\n",
                           "DII_Cubit_Client::parse_args failed"),
                          -1);

      // Get a factory object reference from the factory IOR.
      this->factory_var_ =
        this->orb_var_->string_to_object (this->factory_IOR_
                                          ACE_ENV_ARG_PARAMETER);
      ACE_TRY_CHECK;

      // Get a Cubit object with a DII request on the Cubit factory.
      CORBA::Request_var mc_req (this->factory_var_->_request ("make_cubit"
                                                               ACE_ENV_ARG_PARAMETER));

      ACE_TRY_CHECK;

      // make_cubit takes a char* arg that it doesn't use, but we must
      // still include it in the request.
      const char * dummy = "";

      mc_req->add_in_arg () <<= dummy;

      mc_req->set_return_type (CORBA::_tc_Object);

      // Invoke the <make_cubit> operation to ask the Cubit factory
      // for a Cubit object.
      mc_req->invoke (ACE_ENV_SINGLE_ARG_PARAMETER);
      ACE_TRY_CHECK;

      // Extract the returned object reference from the request.
      mc_req->return_value () >>= CORBA::Any::to_object (this->obj_var_.out ());

      if (CORBA::is_nil (this->obj_var_.in ()))
        ACE_ERROR_RETURN ((LM_ERROR,
                           " could not obtain Cubit object from Cubit factory <%s>\n"),
                          -1);
    }
  ACE_CATCHANY
    {
      ACE_PRINT_EXCEPTION (ACE_ANY_EXCEPTION,
                           "DII_Cubit_Client::init");
      return -1;
    }
  ACE_ENDTRY;

  return 0;
}

// Sort out the args in the command line.

int
DII_Cubit_Client::parse_args (void)
{
  ACE_Get_Opt opts (argc_, argv_, "dn:i:f:x");
  int c;
  int result;

  while ((c = opts ()) != -1)
    switch (c)
      {
      case 'd':   // debug flag
        TAO_debug_level++;
        break;
      case 'n':   // loop count
        this->loop_count_ = ACE_OS::atoi (opts.opt_arg ());
        break;
      case 'i':   // Get the IOR from the command line.
        this->factory_IOR_ = opts.opt_arg ();
        break;
      case 'f':   // Read the IOR from the file.
        result = this->read_ior (opts.opt_arg ());
        if (result < 0)
          ACE_ERROR_RETURN ((LM_ERROR,
                             "Unable to read ior from %s : %p\n",
                             opts.opt_arg ()),
                            -1);
        break;
      case 'x':   // Shut down server after test run.
        this->shutdown_ = 1;
        break;
      case '?':
      default:
        ACE_ERROR_RETURN ((LM_ERROR,
                           "usage: %s"
                           " [-d]"
                           " [-n calls/loop]"
                           " [-i cubit-factory-IOR]"
                           " [-f filename]"
                           " [-x]"
                           "\n",
                           this->argv_ [0]),
                          -1);
      }
  return 0;  // Indicates successful parsing of command line.
}

// Get the factory IOR from the file created by the server.
int
DII_Cubit_Client::read_ior (char *filename)
{
  // Open the file for reading.
  this->f_handle_ = ACE_OS::open (filename,0);

  if (this->f_handle_ == ACE_INVALID_HANDLE)
    ACE_ERROR_RETURN ((LM_ERROR,
                       "Unable to open %s for writing: %p\n",
                       filename),
                      -1);

  ACE_Read_Buffer ior_buffer (this->f_handle_);

  this->factory_IOR_ = ior_buffer.read ();

  if (this->factory_IOR_ == 0)
    ACE_ERROR_RETURN ((LM_ERROR,
                       "Unable to allocate memory to read ior: %p\n"),
                      -1);
  return 0;
}

// Formats and prints time statistics.  Identical to function in
// IDL_Cubit, for ease of comparison.

void
DII_Cubit_Client::print_stats (const char *call_name,
                               ACE_Profile_Timer::ACE_Elapsed_Time &elapsed_time)
{
  ACE_DEBUG ((LM_DEBUG,
              "%s:\n",
              call_name));

  if (this->call_count_ > 0
      && this->error_count_ == 0)
    {
#if defined (ACE_LACKS_FLOATING_POINT)
      // elapsed_time.real_time is in units of microseconds.
      const u_int calls_per_sec =
        this->call_count_ * 1000000u / elapsed_time.real_time;

      ACE_DEBUG ((LM_DEBUG,
                  "\treal_time\t= %u ms,\n"
                  "\t%u calls/second\n",
                  elapsed_time.real_time / 1000u,
                  calls_per_sec));
#else  /* ! ACE_LACKS_FLOATING_POINT */
      // elapsed_time.real_time is in units of seconds.
      double calls_per_sec =
        this->call_count_ / elapsed_time.real_time;

      ACE_DEBUG ((LM_DEBUG,
                  "\treal_time\t= %0.06f ms, \n\t"
                  "user_time\t= %0.06f ms, \n\t"
                  "system_time\t= %0.06f ms\n"
                  "\t%0.00f calls/second\n",
                  elapsed_time.real_time < 0.0 ? 0.0
                  : elapsed_time.real_time * ACE_ONE_SECOND_IN_MSECS,
                  elapsed_time.user_time < 0.0 ? 0.0
                  : elapsed_time.user_time * ACE_ONE_SECOND_IN_MSECS,
                  elapsed_time.system_time < 0.0 ? 0.0
                  : elapsed_time.system_time * ACE_ONE_SECOND_IN_MSECS,
                  calls_per_sec < 0.0 ? 0.0 : calls_per_sec));
#endif /* ! ACE_LACKS_FLOATING_POINT */
    }
  else
    ACE_ERROR ((LM_ERROR,
                "\tNo time stats printed.  "
                "Call count zero or error ocurred.\n"));

  ACE_DEBUG ((LM_DEBUG,
              "\t%d calls, %d errors\n",
              this->call_count_,
              this->error_count_));
}

void
DII_Cubit_Client::cube_short_dii (void)
{
  ACE_TRY_NEW_ENV
    {
      // Create the request ...
      CORBA::Request_var req (this->obj_var_->_request ("cube_short"
                                                        ACE_ENV_ARG_PARAMETER));

      ACE_TRY_CHECK;

      CORBA::Short ret_short = 0;
      CORBA::Short arg_short = -3;

      // Add the short to the request arg list.
      req->add_in_arg () <<= arg_short;

      req->set_return_type (CORBA::_tc_short);

      this->call_count_++;

      req->invoke (ACE_ENV_SINGLE_ARG_PARAMETER);
      ACE_TRY_CHECK;

      req->return_value () >>= ret_short;

      if (ret_short != arg_short * arg_short * arg_short)
        {
          ACE_ERROR ((LM_ERROR,
                      "cube_short_dii -- bad results\n"));

          this->error_count_++;
        }
    }
  ACE_CATCHANY
    {
      this->error_count_++;
      ACE_PRINT_EXCEPTION (ACE_ANY_EXCEPTION,
                           "cube_short_dii");
      return;
    }
  ACE_ENDTRY;
}

void
DII_Cubit_Client::cube_long_dii (void)
{
  ACE_TRY_NEW_ENV
    {