ft_replicafactory_i.cpp

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,他广泛可用于网络游戏医学图像网关的高qos要求.更详细的内容可阅读相应的材料

/* -*- C++ -*- */
//=============================================================================
/**
 *  @file    FT_ReplicaFactory_i.cpp
 *
 *  FT_ReplicaFactory_i.cpp,v 1.2 2003/12/22 01:44:38 wilson_d Exp
 *
 *  This file is part of Fault Tolerant CORBA.
 *
 *  @author Dale Wilson <[e-mail]>
 */
//=============================================================================
#include "FT_ReplicaFactory_i.h"
#include "FT_TestReplica_i.h"
#include <ace/Get_Opt.h>
#include <orbsvcs/CosNamingC.h>
#include <orbsvcs/PortableGroupC.h>
#include <tao/PortableServer/ORB_Manager.h>
#include <orbsvcs/PortableGroup/PG_Property_Set.h>

// Use this macro at the beginning of CORBA methods
// to aid in debugging.
#define METHOD_ENTRY(name)    \
    ACE_DEBUG (( LM_DEBUG,    \
    "Enter %s\n", #name       \
      ))

// Use this macro to return from CORBA methods
// to aid in debugging.  Note that you can specify
// the return value after the macro, for example:
// METHOD_RETURN(Plugh::plover) xyzzy; is equivalent
// to return xyzzy;
// METHOD_RETURN(Plugh::troll); is equivalent to
// return;
// WARNING: THIS GENERATES TWO STATEMENTS!!! THE FOLLOWING
// will not do what you want it to:
//  if (cave_is_closing) METHOD_RETURN(Plugh::pirate) aarrggh;
// Moral:  Always use braces.
#define METHOD_RETURN(name)   \
    ACE_DEBUG (( LM_DEBUG,    \
      "Leave %s\n", #name     \
      ));                     \
    return /* value goes here */


static const char * criterion_initial_value = "INITIAL_VALUE";

//////////////////////////////////////////////////////
// FT_ReplicaFactory_i  Construction/destruction

FT_ReplicaFactory_i::FT_ReplicaFactory_i ()
  : internals_ ()
  , orb_ (CORBA::ORB::_nil ())
  , poa_ (PortableServer::POA::_nil ())
  , object_id_ ()
  , ior_ ()
  , ior_output_file_ (0)
  , identity_ ()
  , have_replication_manager_(0)
  , replication_manager_(0)
  , factory_registry_ior_(0)
  , factory_registry_ (0)
  , registered_(0)
  , test_output_file_(0)
  , ns_name_(0)
  , naming_context_ (CosNaming::NamingContext::_nil ())
  , this_name_ ()
  , roles_ ()
  , location_ ("unknown")
  , quit_on_idle_ (0)
  , unregister_by_location_ (0)
  , replicas_ ()
  , empty_slots_(0)
  , quit_requested_(0)
{
  ACE_DEBUG((LM_DEBUG, "TestReplica type_id: %s\n", FT_TEST::_tc_TestReplica->id() ));
//  ACE_DEBUG((LM_DEBUG, "Hobbit type_id: %s\n", FT_TEST::_tc_Hobbit->id() ));
//  ACE_DEBUG((LM_DEBUG, "Elf type_id: %s\n", FT_TEST::_tc_Elf->id() ));
//  ACE_DEBUG((LM_DEBUG, "Human type_id: %s\n", FT_TEST::_tc_Human->id() ));

}


FT_ReplicaFactory_i::~FT_ReplicaFactory_i ()
{
  //scope the guard
  {
    InternalGuard guard (this->internals_);

    // be sure all replicas are gone
    // before this object disappears
    shutdown_i ();
  }
}

////////////////////////////////////////////
// FT_ReplicaFactory_i private methods

CORBA::ULong FT_ReplicaFactory_i::allocate_id()
{
  // assume mutex is locked
  CORBA::ULong id = this->replicas_.size();
  if (this->empty_slots_ != 0)
  {
    for(CORBA::ULong pos = 0; pos < id; ++pos)
    {
      if (this->replicas_[pos] == 0)
      {
        id = pos;
      }
    }
  }
  else
  {
    this->replicas_.push_back(0);
    this->empty_slots_ += 1;
  }
  return id;
}

void FT_ReplicaFactory_i::shutdown_i()
{
  // assume mutex is locked
  for (size_t nReplica = 0; nReplica < this->replicas_.size(); ++nReplica)
  {
    FT_TestReplica_i * replica = this->replicas_[nReplica];
    if (replica != 0)
    {
      replica->request_quit();
    }
  }
}

int FT_ReplicaFactory_i::write_ior(const char * outputFile, const char * ior)
{
  int result = -1;
  FILE* out = ACE_OS::fopen (outputFile, "w");
  if (out)
  {
    ACE_OS::fprintf (out, "%s", ior);
    ACE_OS::fclose (out);
    result = 0;
  }
  else
  {
    ACE_ERROR ((LM_ERROR,
      "Open failed for %s\n", outputFile
    ));
  }
  return result;
}

//////////////////////////////////////////////////////
// FT_ReplicaFactory_i public, non-CORBA methods

int FT_ReplicaFactory_i::parse_args (int argc, char * argv[])
{
  ACE_Get_Opt get_opts (argc, argv, "o:n:f:i:l:t:qu");
  int c;

  while ((c = get_opts ()) != -1)
  {
    switch (c)
    {
      case 'o':
      {
        this->ior_output_file_ = get_opts.opt_arg ();
        break;
      }
      case 'n':
      {
        this->ns_name_ = get_opts.opt_arg ();
        break;
      }
      case 'f':
      {
        this->factory_registry_ior_ = get_opts.opt_arg ();
        break;
      }
      case 'i':
      {
        this->roles_.push_back(get_opts.opt_arg ());
        break;
      }
      case 'l':
      {
        this->location_ = get_opts.opt_arg ();
        break;
      }
      case 'q':
      {
        this->quit_on_idle_ = 1;
        break;
      }
      case 'u':
      {
        this->unregister_by_location_ = 1;
        break;
      }

      case 't':
      {
        this->test_output_file_ = get_opts.opt_arg ();
        break;
      }

      case '?':
        // fall thru
      default:
        ACE_ERROR_RETURN ((LM_ERROR,
                           "usage:  %s \n"
                           " -o <factory ior file>\n"
                           " -n <naming service registration name>\n"
                           " -f <factory registry ior file>\n"
                           " -i <registration: role>\n"
                           " -l <registration: location>\n"
                           " -t <test replica ior file>\n"
                           " -u{nregister by location}\n"
                           " -q{uit on idle}\n",
                           argv [0]),
                          -1);
      break;
    }
  }
  // Indicates sucessful parsing of the command line
  return 0;
}

const char * FT_ReplicaFactory_i::location () const
{
  return this->location_;
}

const char * FT_ReplicaFactory_i::identity () const
{
  return this->identity_.c_str();
}

int FT_ReplicaFactory_i::idle (int & result)
{
  result = 0;
  size_t replicaCount = this->replicas_.size();
  if (replicaCount != this->empty_slots_)
  {
    for (size_t nReplica = 0; result == 0 && nReplica < replicaCount; ++nReplica)
    {
      FT_TestReplica_i * replica = this->replicas_[nReplica];
      if (replica != 0)
      {
        // give the replica's idle processing a change
        // ignore the return status (the replica should shut itself down
        // unless result is non-zero.
        // non-zero result means panic.
        replica->idle(result);
      }
    }
  }

  int quit = (this->quit_requested_ || result != 0);
  if (!quit && this->replicas_.size() == this->empty_slots_)
  {
/*  if you re-enable this, add some kind of throttle to avoid noise.
    ACE_ERROR (( LM_ERROR,
      "ReplicaFactory is idle.\n"
      ));
*/
    if (this->quit_on_idle_ && this->empty_slots_ != 0)
    {
      ACE_ERROR (( LM_ERROR,
        "%s exits due to quit on idle option.\n",
        identity()
        ));
      quit = 1;
    }
  }

  return quit;
}



int FT_ReplicaFactory_i::init (CORBA::ORB_ptr orb ACE_ENV_ARG_DECL)
{
  int result = 0;

  this->orb_ = CORBA::ORB::_duplicate (orb);

  // Use the ROOT POA for now
  CORBA::Object_var poa_object =
    this->orb_->resolve_initial_references (TAO_OBJID_ROOTPOA
                                            ACE_ENV_ARG_PARAMETER);
  ACE_CHECK_RETURN (-1);

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

  // Get the POA object.
  this->poa_ =
    PortableServer::POA::_narrow (poa_object.in ()
                                  ACE_ENV_ARG_PARAMETER);

  ACE_CHECK_RETURN (-1);
  if (CORBA::is_nil(this->poa_.in ()))
  {
    ACE_ERROR_RETURN ((LM_ERROR,
                       ACE_TEXT (" (%P|%t) Unable to narrow the POA.\n")),
                      -1);
  }

  PortableServer::POAManager_var poa_manager =
    this->poa_->the_POAManager (ACE_ENV_SINGLE_ARG_PARAMETER);
  ACE_CHECK_RETURN (-1);

  poa_manager->activate (ACE_ENV_SINGLE_ARG_PARAMETER);
  ACE_CHECK_RETURN (-1);

  // Register with the POA.

  this->object_id_ = this->poa_->activate_object (this ACE_ENV_ARG_PARAMETER);
  ACE_CHECK_RETURN (-1);

  CORBA::Object_var this_obj =
    this->poa_->id_to_reference (object_id_.in ()
                                 ACE_ENV_ARG_PARAMETER);
  ACE_CHECK_RETURN (-1);

  this->ior_ = this->orb_->object_to_string (this_obj.in ()
                                  ACE_ENV_ARG_PARAMETER);
  ACE_CHECK_RETURN (-1);

  if (this->factory_registry_ior_ != 0)
  {
    if (ACE_OS::strcmp (this->factory_registry_ior_, "none") != 0)
    {
      CORBA::Object_var reg_obj = this->orb_->string_to_object(factory_registry_ior_
                                    ACE_ENV_ARG_PARAMETER);
      ACE_CHECK_RETURN (-1);
      this->factory_registry_ = ::PortableGroup::FactoryRegistry::_narrow(reg_obj.in ());
      if (CORBA::is_nil(this->factory_registry_.in ()))
      {
        ACE_ERROR (( LM_ERROR,
           "Can't resolve Factory Registry IOR %s\n",
           this->factory_registry_ior_
           ));
        result = -1;
      }
    }
  }
  else // no -f option.  Try RIR(RM)
  {
    ///////////////////////////////
    // Find the ReplicationManager
    ACE_TRY_NEW_ENV
    {
      CORBA::Object_var rm_obj = orb->resolve_initial_references("ReplicationManager" ACE_ENV_ARG_PARAMETER);
      ACE_TRY_CHECK;
      this->replication_manager_ = ::FT::ReplicationManager::_narrow(rm_obj.in() ACE_ENV_ARG_PARAMETER);
      ACE_TRY_CHECK;
      if (!CORBA::is_nil (replication_manager_.in ()))
      {
        this->have_replication_manager_ = 1;
        // empty criteria
        ::PortableGroup::Criteria criteria;
        this->factory_registry_ = this->replication_manager_->get_factory_registry(criteria  ACE_ENV_ARG_PARAMETER);
        ACE_TRY_CHECK;
        if (CORBA::is_nil (this->factory_registry_.in ()))
        {
          ACE_ERROR ((LM_ERROR,"ReplicaFactory: ReplicationManager failed to return FactoryRegistry.  Factory will not be registered.\n" ));
        }
      }
      else
      {
        this->factory_registry_ =  ::PortableGroup::FactoryRegistry::_narrow(rm_obj.in()  ACE_ENV_ARG_PARAMETER);
        ACE_TRY_CHECK;
        if (!CORBA::is_nil(this->factory_registry_.in ()))
        {
          ACE_DEBUG ((LM_DEBUG,"Found a FactoryRegistry DBA ReplicationManager\n" ));
        }
        else
        {
          ACE_ERROR ((LM_ERROR,"ReplicaFactory: Can't resolve ReplicationManager.\n" ));
        }
      }
    }