base_server.cpp

来自「这是广泛使用的通信开源项目,对于大容量,高并发的通讯要求完全能够胜任,他广泛可用」· C++ 代码 · 共 227 行

// Base_Server.cpp,v 1.11 2003/05/08 15:51:17 parsons Exp

#include "ace/Sched_Params.h"
#include "ace/Get_Opt.h"

#include "AMH_Servant.h"
#include "Base_Server.h"
#include "tao/Strategies/advanced_resource.h"

#include "TestC.h"

#if !defined (__ACE_INLINE__)
# include "Base_Server.inl"
#endif /* __ACE_INLINE__ */

Base_Server::Base_Server (int& argc, char **argv)
  : argc_ (argc)
  , argv_ (argv)
  , ior_output_file_ ("test.ior")
{
}

Base_Server::~Base_Server (void)
{
  ACE_TRY_NEW_ENV
    {
      this->root_poa_->destroy (1, 1 ACE_ENV_ARG_PARAMETER);
      ACE_TRY_CHECK;

      this->orb_->destroy (ACE_ENV_SINGLE_ARG_PARAMETER);
      ACE_TRY_CHECK;
    }
  ACE_CATCHANY
    {
      ACE_PRINT_EXCEPTION (ACE_ANY_EXCEPTION,
                           "Exception caught while destroying Base_Server \n");
    }
  ACE_ENDTRY;
}

int
Base_Server::parse_args (void)
{
  // *** To get correct behaviour, set ** POSIXLY_CORECT=1 ** on Linux
  // systems!!! ***
  ACE_Get_Opt get_opts (this->argc_, this->argv_, "o:");
  int c;
  int count_argv = 0;

  while ((c = get_opts ()) != -1)
    {
      ++count_argv;
      switch (c)
        {
        case 'o':
          {
            this->ior_output_file_ = get_opts.opt_arg ();

            // Remove the option '-o' from argv []
            // to avoid any confusion that might result.
            {
              for (int i = count_argv; i <= this->argc_; ++i)
                this->argv_ [i] = this->argv_ [i+2];
            }

            // Decrement the value of this->argc_ to reflect the removal
            // of '-o' option.
            this->argc_ = this->argc_ - 2;

            return 1;
          }
        case '?':
        default:
          // Don't do anything.
          break;
        }
    }

  return 0;
}

void
Base_Server::try_RT_scheduling (void)
{
  int priority =
    (ACE_Sched_Params::priority_min (ACE_SCHED_FIFO)
     + ACE_Sched_Params::priority_max (ACE_SCHED_FIFO)) / 2;
  priority = ACE_Sched_Params::next_priority (ACE_SCHED_FIFO,
                                              priority);

  // Enable FIFO scheduling, e.g., RT scheduling class on Solaris.
  if (ACE_OS::sched_params (ACE_Sched_Params (ACE_SCHED_FIFO,
                                              priority,
                                              ACE_SCOPE_PROCESS)) != 0)
    {
      if (errno == EPERM)
        {
          ACE_DEBUG ((LM_DEBUG,
                      "server (%P|%t): user is not superuser, "
                      "test runs in time-shared class\n"));
        }
      else
        ACE_ERROR ((LM_ERROR,
                    "server (%P|%t): sched_params failed\n"));
    }
}

int
Base_Server::start_orb_and_poa (void)
{
  ACE_TRY_NEW_ENV
    {
      this->orb_ = CORBA::ORB_init (this->argc_,
                                    this->argv_,
                                    "" ACE_ENV_ARG_PARAMETER);
      ACE_TRY_CHECK;

      CORBA::Object_var poa_object =
        this->orb_->resolve_initial_references("RootPOA"
                                               ACE_ENV_ARG_PARAMETER);
      ACE_TRY_CHECK;

      if (CORBA::is_nil (poa_object.in ()))
        ACE_ERROR_RETURN ((LM_ERROR,
                           " (%P|%t) Unable to initialize the POA.\n"),
                          1);

      this->root_poa_ = PortableServer::POA::_narrow (poa_object.in ()
                                                      ACE_ENV_ARG_PARAMETER);
      ACE_TRY_CHECK;

      PortableServer::POAManager_var poa_manager =
        this->root_poa_->the_POAManager (ACE_ENV_SINGLE_ARG_PARAMETER);
      ACE_TRY_CHECK;

      poa_manager->activate (ACE_ENV_SINGLE_ARG_PARAMETER);
      ACE_TRY_CHECK;

    }
  ACE_CATCHANY
    {
      ACE_PRINT_EXCEPTION (ACE_ANY_EXCEPTION,
                           "Exception raised initialising ORB or POA");
      return -1;
    }
  ACE_ENDTRY;

  // If we have got to this point, everything has gone well.  return
  // normally
  return 1;
}

void
Base_Server::register_servant (AMH_Servant *servant)
{
  ACE_TRY_NEW_ENV
    {
      Test::Roundtrip_var roundtrip =
        servant->_this (ACE_ENV_SINGLE_ARG_PARAMETER);
      ACE_TRY_CHECK;

      CORBA::String_var ior =
        this->orb_->object_to_string (roundtrip.in ()
                                      ACE_ENV_ARG_PARAMETER);
      ACE_TRY_CHECK;

      (void) this->write_ior_to_file (ior.in ());
    }
  ACE_CATCHANY
    {
      ACE_PRINT_EXCEPTION (ACE_ANY_EXCEPTION,
                           "Exception raised while registering servant");
    }
  ACE_ENDTRY;
}


void
Base_Server::run_event_loop (void)
{
  ACE_DECLARE_NEW_CORBA_ENV;
  ACE_TRY
    {
      ACE_Time_Value period (0, 11000);
      while (1)
        {
          // @@ Mayur, where's the work_pending() call?
          //
          // Mayur: Nope. There is purposely no work_pending call. The
          // reactor doesn't acknowledge expired timers as work. The
          // reactor only thinks I/O events as work.  Thus, timers
          // that have expired after all the client requests are made
          // are never handled. This results in the server not sending
          // (some) replies to the client and the client just ends up
          // waiting (forever) for them.
          this->orb_->perform_work (period ACE_ENV_ARG_PARAMETER);
          ACE_TRY_CHECK;
        }
    }
  ACE_CATCHANY
    {
      ACE_PRINT_EXCEPTION (ACE_ANY_EXCEPTION,
                           "Caught exceptionin Base_Server::run_event_loop");
    }
  ACE_ENDTRY;
}

int
Base_Server::write_ior_to_file (const char * ior)
{
  // If the ior_output_file exists, output the ior to it
  FILE *output_file =
    ACE_OS::fopen (this->ior_output_file_, "w");

  if (output_file == 0)
    {
      ACE_ERROR ((LM_ERROR,
                  "Cannot open output file for writing IOR: %s",
                  this->ior_output_file_));
      return -1;
    }

  ACE_OS::fprintf (output_file, "%s", ior);
  ACE_OS::fclose (output_file);
  return 0;
}