Profile_Transport_Resolver.cpp

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// Profile_Transport_Resolver.cpp,v 1.18 2006/04/30 14:25:48 mesnier_p Exp

#include "tao/Profile_Transport_Resolver.h"
#include "tao/Profile.h"
#include "tao/Stub.h"
#include "tao/Transport.h"
#include "tao/Invocation_Endpoint_Selectors.h"
#include "tao/ORB_Core.h"
#include "tao/Thread_Lane_Resources.h"
#include "tao/Transport_Cache_Manager.h"
#include "tao/Endpoint_Selector_Factory.h"
#include "tao/Codeset_Manager.h"
#include "tao/Connector_Registry.h"
#include "tao/Transport_Connector.h"
#include "tao/Endpoint.h"
#include "tao/SystemException.h"
#include "tao/Client_Strategy_Factory.h"

#include "ace/Countdown_Time.h"

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

ACE_RCSID (tao,
           Profile_Transport_Resolver,
           "Profile_Transport_Resolver.cpp,v 1.18 2006/04/30 14:25:48 mesnier_p Exp")


TAO_BEGIN_VERSIONED_NAMESPACE_DECL

namespace TAO
{

  Profile_Transport_Resolver::~Profile_Transport_Resolver (void)
  {
    if (this->profile_)
      {
        this->profile_->_decr_refcnt ();
      }

    if (this->transport_)
      {
        if (this->is_released_ == false)
          {
            this->transport_->make_idle ();
          }

        this->transport_->remove_reference ();
      }

    delete this->inconsistent_policies_;
  }

  void
  Profile_Transport_Resolver::profile (TAO_Profile *p)
  {
    // Dont do anything if the incoming profile is null
    if (p)
      {
        // @note This is just a workaround for a more serious problem
        // with profile management. This would cover some potential
        // issues that Ossama is working on.  Ossama, please remove
        // them when you are done.
        TAO_Profile *tmp = this->profile_;

        (void) p->_incr_refcnt ();
        this->profile_ = p;

        if (tmp)
          {
            (void) tmp->_decr_refcnt ();
          }
      }
  }


  void
  Profile_Transport_Resolver::resolve (ACE_Time_Value *max_time_val
                                       ACE_ENV_ARG_DECL)
    ACE_THROW_SPEC ((CORBA::SystemException))
  {
    ACE_Countdown_Time countdown (max_time_val);

    TAO_Invocation_Endpoint_Selector *es =
      this->stub_->orb_core ()->endpoint_selector_factory ()->get_selector (
          ACE_ENV_SINGLE_ARG_PARAMETER);
    ACE_CHECK;

    // Select the endpoint
    es->select_endpoint (this,
                         max_time_val
                         ACE_ENV_ARG_PARAMETER);
    ACE_CHECK;

    if (this->transport_ == 0)
      {
        ACE_THROW (CORBA::INTERNAL ());
      }

    const TAO_GIOP_Message_Version& version =
      this->profile_->version ();

    // Initialize the messaging object
    if (this->transport_->messaging_init (version.major, version.minor) == -1)
      {
        ACE_THROW (CORBA::INTERNAL (
                          CORBA::SystemException::_tao_minor_code (
                            0,
                            EINVAL),
                          CORBA::COMPLETED_NO));
      }

    if (!this->transport_->is_tcs_set ())
      {
        TAO_Codeset_Manager * const tcm =
          this->stub_->orb_core ()->codeset_manager ();
        if (tcm)
          tcm->set_tcs (*this->profile_, *this->transport_);
      }
  }

  bool
  Profile_Transport_Resolver::try_connect (
      TAO_Transport_Descriptor_Interface *desc,
       ACE_Time_Value *max_time_value
       ACE_ENV_ARG_DECL
     )
  {
    return this->try_connect_i (desc,max_time_value,0 ACE_ENV_ARG_PARAMETER);
  }

  bool
  Profile_Transport_Resolver::try_parallel_connect (
       TAO_Transport_Descriptor_Interface *desc,
       ACE_Time_Value *max_time_value
       ACE_ENV_ARG_DECL
     )
  {
    return this->try_connect_i (desc,max_time_value,1 ACE_ENV_ARG_PARAMETER);
  }


  bool
  Profile_Transport_Resolver::try_connect_i (
       TAO_Transport_Descriptor_Interface *desc,
       ACE_Time_Value *max_time_value,
       bool parallel
       ACE_ENV_ARG_DECL
     )
  {
    TAO_Connector_Registry *conn_reg =
      this->stub_->orb_core ()->connector_registry (
        ACE_ENV_SINGLE_ARG_PARAMETER);
    ACE_CHECK_RETURN (false);

    if (conn_reg == 0)
      {
        ACE_THROW_RETURN (CORBA::INTERNAL (
                            CORBA::SystemException::_tao_minor_code (
                              0,
                              EINVAL),
                            CORBA::COMPLETED_NO),
                          false);
      }

    ACE_Time_Value connection_timeout;

    bool const is_conn_timeout =
      this->get_connection_timeout (connection_timeout);

    ACE_Time_Value *max_wait_time =
      is_conn_timeout ? &connection_timeout : max_time_value;

    if (parallel)
      {
        this->transport_ =
          conn_reg->get_connector (desc->endpoint ()->tag ())->
          parallel_connect (this,
                            desc,
                            max_wait_time
                            ACE_ENV_ARG_PARAMETER);
        ACE_CHECK_RETURN (false);
      }
    else
      {
    // Obtain a connection.
    this->transport_ =
          conn_reg->get_connector (desc->endpoint ()->tag ())->
          connect (this,
        desc,
        max_wait_time
        ACE_ENV_ARG_PARAMETER);
    ACE_CHECK_RETURN (false);
      }
    // A timeout error occurred.
    // If the user has set a roundtrip timeout policy, throw a timeout
    // exception.  Otherwise, just fall through and return false to
    // look at the next endpoint.
    if (this->transport_ == 0
        && is_conn_timeout == false
        && errno == ETIME)
      {
        ACE_THROW_RETURN (CORBA::TIMEOUT (
                            CORBA::SystemException::_tao_minor_code (
                              TAO_TIMEOUT_CONNECT_MINOR_CODE,
                              errno),
                            CORBA::COMPLETED_NO),
                          false);
      }
    else if (this->transport_ == 0)
      {
        return false;
      }

    return true;
  }

  bool
  Profile_Transport_Resolver::use_parallel_connect (void) const
  {
    TAO_ORB_Core *oc = this->stub_->orb_core();
    return (oc->orb_params()->use_parallel_connects()
#if 0       // it was decided that even with blocked connects
            // parallel connects could be useful, at least for cache
            // processing.
            oc->client_factory()->connect_strategy() !=
            TAO_Client_Strategy_Factory::TAO_BLOCKED_CONNECT
#endif /* 0 */
            );
  }

  bool
  Profile_Transport_Resolver::get_connection_timeout (
    ACE_Time_Value &max_wait_time)
  {
    bool is_conn_timeout = false;

    // Check for the connection timout policy in the ORB
    this->stub_->orb_core ()->connection_timeout (this->stub_,
                                                  is_conn_timeout,
                                                  max_wait_time);

    return is_conn_timeout;
  }


  void
  Profile_Transport_Resolver::init_inconsistent_policies (
    ACE_ENV_SINGLE_ARG_DECL)
    ACE_THROW_SPEC ((CORBA::SystemException))
  {
    ACE_NEW_THROW_EX (this->inconsistent_policies_,
                      CORBA::PolicyList (0),
                      CORBA::NO_MEMORY (
                      CORBA::SystemException::_tao_minor_code (
                        0,
                        ENOMEM),
                      CORBA::COMPLETED_NO));
  }


  int
  Profile_Transport_Resolver::find_transport (TAO_Transport_Descriptor_Interface *desc)
  {
    TAO::Transport_Cache_Manager & cache =
      this->profile_->orb_core()->lane_resources ().transport_cache();

    // the cache increments the reference count on the transport if the
    // find is successful. Find_transport uses negative logic in its return,
    // 0 for success
    return (cache.find_transport(desc,this->transport_) == 0);
  }


}

TAO_END_VERSIONED_NAMESPACE_DECL

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