cec_reactive_consumercontrol.cpp

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// CEC_Reactive_ConsumerControl.cpp,v 1.14 2003/10/28 18:34:18 bala Exp

#include "CEC_Reactive_ConsumerControl.h"
#include "CEC_EventChannel.h"
#include "CEC_ConsumerAdmin.h"

#if defined (TAO_HAS_TYPED_EVENT_CHANNEL)
#include "CEC_TypedEventChannel.h"
#include "CEC_TypedConsumerAdmin.h"
#endif /* TAO_HAS_TYPED_EVENT_CHANNEL */

#include "CEC_ProxyPushSupplier.h"
#include "CEC_ProxyPullSupplier.h"

#include "tao/Messaging/Messaging.h"
#include "tao/ORB_Core.h"

#include "ace/Reactor.h"

#if ! defined (__ACE_INLINE__)
#include "CEC_Reactive_ConsumerControl.i"
#endif /* __ACE_INLINE__ */

ACE_RCSID (CosEvent, 
           CEC_Reactive_ConsumerControl, 
           "CEC_Reactive_ConsumerControl.cpp,v 1.14 2003/10/28 18:34:18 bala Exp")

TAO_CEC_Reactive_ConsumerControl::
     TAO_CEC_Reactive_ConsumerControl (const ACE_Time_Value &rate,
                                       const ACE_Time_Value &timeout,
                                       TAO_CEC_EventChannel *ec,
                                       CORBA::ORB_ptr orb)
  : rate_ (rate),
    timeout_ (timeout),
    adapter_ (this),
    event_channel_ (ec),
    orb_ (CORBA::ORB::_duplicate (orb))
{
  this->reactor_ =
    this->orb_->orb_core ()->reactor ();

#if defined (TAO_HAS_CORBA_MESSAGING) && TAO_HAS_CORBA_MESSAGING != 0
   // Initialise timer_id_ to an invalid timer id, so that in case we don't
   // schedule a timer, we don't cancel a random timer at shutdown
   timer_id_ = -1;
#endif /* TAO_HAS_CORBA_MESSAGING */
}

#if defined (TAO_HAS_TYPED_EVENT_CHANNEL)
TAO_CEC_Reactive_ConsumerControl::
     TAO_CEC_Reactive_ConsumerControl (const ACE_Time_Value &rate,
                                       const ACE_Time_Value &timeout,
                                       TAO_CEC_TypedEventChannel *ec,
                                       CORBA::ORB_ptr orb)
  : rate_ (rate),
    timeout_ (timeout),
    adapter_ (this),
    typed_event_channel_ (ec),
    orb_ (CORBA::ORB::_duplicate (orb))
{
  this->reactor_ =
    this->orb_->orb_core ()->reactor ();

#if defined (TAO_HAS_CORBA_MESSAGING) && TAO_HAS_CORBA_MESSAGING != 0
   // Initialise timer_id_ to an invalid timer id, so that in case we don't
   // schedule a timer, we don't cancel a random timer at shutdown
   timer_id_ = -1;
#endif /* TAO_HAS_CORBA_MESSAGING */
}
#endif /* TAO_HAS_TYPED_EVENT_CHANNEL */

TAO_CEC_Reactive_ConsumerControl::~TAO_CEC_Reactive_ConsumerControl (void)
{
}

void
TAO_CEC_Reactive_ConsumerControl::query_consumers (
      ACE_ENV_SINGLE_ARG_DECL)
{
  TAO_CEC_Ping_Push_Consumer push_worker (this);

#if defined (TAO_HAS_TYPED_EVENT_CHANNEL)
  if (this->typed_event_channel_)
    {
      this->typed_event_channel_->typed_consumer_admin ()->for_each (&push_worker
                                                                     ACE_ENV_ARG_PARAMETER);
      ACE_CHECK;
    }
  else
    {
#endif /* TAO_HAS_TYPED_EVENT_CHANNEL */

  this->event_channel_->consumer_admin ()->for_each (&push_worker
                                                     ACE_ENV_ARG_PARAMETER);
  ACE_CHECK;

  TAO_CEC_Ping_Pull_Consumer pull_worker (this);
  this->event_channel_->consumer_admin ()->for_each (&pull_worker
                                                     ACE_ENV_ARG_PARAMETER);
  ACE_CHECK;

#if defined (TAO_HAS_TYPED_EVENT_CHANNEL)
    }
#endif /* TAO_HAS_TYPED_EVENT_CHANNEL */
}

void
TAO_CEC_Reactive_ConsumerControl::handle_timeout (
      const ACE_Time_Value &,
      const void *)
{
  ACE_TRY_NEW_ENV
    {
      // Query the state of the Current object *before* we initiate
      // the iteration...
      CORBA::PolicyTypeSeq types;
      CORBA::PolicyList_var policies =
        this->policy_current_->get_policy_overrides (types
                                                     ACE_ENV_ARG_PARAMETER);
      ACE_TRY_CHECK;

      // Change the timeout
      this->policy_current_->set_policy_overrides (this->policy_list_,
                                                   CORBA::ADD_OVERRIDE
                                                   ACE_ENV_ARG_PARAMETER);
      ACE_TRY_CHECK;

      // Query the state of the consumers...
      this->query_consumers (ACE_ENV_SINGLE_ARG_PARAMETER);
      ACE_TRY_CHECK;

      this->policy_current_->set_policy_overrides (policies.in (),
                                                   CORBA::SET_OVERRIDE
                                                   ACE_ENV_ARG_PARAMETER);
      ACE_TRY_CHECK;
      for (CORBA::ULong i = 0; i != policies->length (); ++i)
        {
          policies[i]->destroy (ACE_ENV_SINGLE_ARG_PARAMETER);
          ACE_TRY_CHECK;
        }
    }
  ACE_CATCHANY
    {
      // Ignore all exceptions
    }
  ACE_ENDTRY;
}

int
TAO_CEC_Reactive_ConsumerControl::activate (void)
{
#if defined (TAO_HAS_CORBA_MESSAGING) && TAO_HAS_CORBA_MESSAGING != 0
  ACE_TRY_NEW_ENV
    {
      // Get the PolicyCurrent object
      CORBA::Object_var tmp =
        this->orb_->resolve_initial_references ("PolicyCurrent"
                                                ACE_ENV_ARG_PARAMETER);
      ACE_TRY_CHECK;

      this->policy_current_ =
        CORBA::PolicyCurrent::_narrow (tmp.in ()
                                       ACE_ENV_ARG_PARAMETER);
      ACE_TRY_CHECK;

      // Timeout for polling state (default = 10 msec)
      TimeBase::TimeT timeout = timeout_.usec() * 10;
      CORBA::Any any;
      any <<= timeout;

      this->policy_list_.length (1);
      this->policy_list_[0] =
        this->orb_->create_policy (
               Messaging::RELATIVE_RT_TIMEOUT_POLICY_TYPE,
               any
               ACE_ENV_ARG_PARAMETER);
      ACE_TRY_CHECK;

      // Only schedule the timer, when the rate is not zero
      if (this->rate_ != ACE_Time_Value::zero)
      {
        // Schedule the timer after these policies has been set, because the
        // handle_timeout uses these policies, if done in front, the channel
        // can crash when the timeout expires before initiazation is ready.
        timer_id_ = this->reactor_->schedule_timer (&this->adapter_,
                                                    0,
                                                    this->rate_,
                                                    this->rate_);
        if (timer_id_ == -1)
         return -1;
      }
    }
  ACE_CATCHANY
    {
      return -1;
    }
  ACE_ENDTRY;
#endif /* TAO_HAS_CORBA_MESSAGING */

  return 0;
}

int
TAO_CEC_Reactive_ConsumerControl::shutdown (void)
{
  int r = 0;

#if defined (TAO_HAS_CORBA_MESSAGING) && TAO_HAS_CORBA_MESSAGING != 0
  r = this->reactor_->cancel_timer (timer_id_);
#endif /* TAO_HAS_CORBA_MESSAGING */
  this->adapter_.reactor (0);
  return r;
}

void
TAO_CEC_Reactive_ConsumerControl::consumer_not_exist (
      TAO_CEC_ProxyPushSupplier *proxy
      ACE_ENV_ARG_DECL)
{
  ACE_TRY
    {
      proxy->disconnect_push_supplier (ACE_ENV_SINGLE_ARG_PARAMETER);
      ACE_TRY_CHECK;
    }
  ACE_CATCHANY
    {
      ACE_PRINT_EXCEPTION (ACE_ANY_EXCEPTION,
                           "Reactive_ConsumerControl::consumer_not_exist");
      // Ignore all exceptions..
    }
  ACE_ENDTRY;
}

void
TAO_CEC_Reactive_ConsumerControl::consumer_not_exist (
      TAO_CEC_ProxyPullSupplier *proxy
      ACE_ENV_ARG_DECL)
{
  ACE_TRY
    {
      proxy->disconnect_pull_supplier (ACE_ENV_SINGLE_ARG_PARAMETER);
      ACE_TRY_CHECK;
    }
  ACE_CATCHANY
    {
      ACE_PRINT_EXCEPTION (ACE_ANY_EXCEPTION,
                           "Reactive_ConsumerControl::consumer_not_exist");
      // Ignore all exceptions..
    }
  ACE_ENDTRY;
}

void
TAO_CEC_Reactive_ConsumerControl::system_exception (
      TAO_CEC_ProxyPushSupplier *proxy,
      CORBA::SystemException & /* exception */
      ACE_ENV_ARG_DECL)
{
  ACE_TRY
    {
      // The current implementation is very strict, and kicks out a
      // client on the first system exception. We may
      // want to be more lenient in the future, for example,
      // this is TAO's minor code for a failed connection.
      //
      // if (CORBA::TRANSIENT::_narrow (&exception) != 0
      //     && exception->minor () == 0x54410085)
      //   return;

      // Anything else is serious, including timeouts...
      proxy->disconnect_push_supplier (ACE_ENV_SINGLE_ARG_PARAMETER);
      ACE_TRY_CHECK;
    }
  ACE_CATCHANY
    {
      // Ignore all exceptions..
    }
  ACE_ENDTRY;
}

// ****************************************************************

TAO_CEC_ConsumerControl_Adapter::TAO_CEC_ConsumerControl_Adapter (
      TAO_CEC_Reactive_ConsumerControl *adaptee)
  :  adaptee_ (adaptee)
{
}

int
TAO_CEC_ConsumerControl_Adapter::handle_timeout (
      const ACE_Time_Value &tv,
      const void *arg)
{
  this->adaptee_->handle_timeout (tv, arg);
  return 0;
}

// ****************************************************************

void
TAO_CEC_Ping_Push_Consumer::work (TAO_CEC_ProxyPushSupplier *supplier
                                  ACE_ENV_ARG_DECL)
{
  ACE_TRY
    {
      CORBA::Boolean disconnected;
      CORBA::Boolean non_existent =
        supplier->consumer_non_existent (disconnected
                                         ACE_ENV_ARG_PARAMETER);
      ACE_TRY_CHECK;
      if (non_existent && !disconnected)
        {
          this->control_->consumer_not_exist (supplier ACE_ENV_ARG_PARAMETER);
          ACE_TRY_CHECK;
        }
    }
  ACE_CATCH (CORBA::OBJECT_NOT_EXIST, ex)
    {
      this->control_->consumer_not_exist (supplier ACE_ENV_ARG_PARAMETER);
      ACE_TRY_CHECK;
    }
  ACE_CATCH (CORBA::TRANSIENT, transient)
    {
      // The current implementation is very strict, and kicks out a
      // client on the first system exception. We may
      // want to be more lenient in the future, for example,
      // this is TAO's minor code for a failed connection.
      //
      // if (CORBA::TRANSIENT::_narrow (&exception) != 0
      //     && exception->minor () == 0x54410085)
      //   return;

      this->control_->consumer_not_exist (supplier ACE_ENV_ARG_PARAMETER);
      ACE_TRY_CHECK;
    }
  ACE_CATCHANY
    {
      // Ignore all exceptions
    }
  ACE_ENDTRY;
}

// ****************************************************************

void
TAO_CEC_Ping_Pull_Consumer::work (TAO_CEC_ProxyPullSupplier *supplier
                                  ACE_ENV_ARG_DECL)
{
  ACE_TRY
    {
      CORBA::Boolean disconnected;
      CORBA::Boolean non_existent =
        supplier->consumer_non_existent (disconnected
                                         ACE_ENV_ARG_PARAMETER);
      ACE_TRY_CHECK;
      if (non_existent && !disconnected)
        {
          this->control_->consumer_not_exist (supplier ACE_ENV_ARG_PARAMETER);
          ACE_TRY_CHECK;
        }
    }
  ACE_CATCH (CORBA::OBJECT_NOT_EXIST, ex)
    {
      this->control_->consumer_not_exist (supplier ACE_ENV_ARG_PARAMETER);
      ACE_TRY_CHECK;
    }
  ACE_CATCH (CORBA::TRANSIENT, transient)
    {
      // The current implementation is very strict, and kicks out a
      // client on the first system exception. We may
      // want to be more lenient in the future, for example,
      // this is TAO's minor code for a failed connection.
      //
      // if (CORBA::TRANSIENT::_narrow (&exception) != 0
      //     && exception->minor () == 0x54410085)
      //   return;

      this->control_->consumer_not_exist (supplier ACE_ENV_ARG_PARAMETER);
      ACE_TRY_CHECK;
    }
  ACE_CATCHANY
    {
      // Ignore all exceptions
    }
  ACE_ENDTRY;
}

#if defined (ACE_HAS_EXPLICIT_TEMPLATE_INSTANTIATION)

#elif defined(ACE_HAS_TEMPLATE_INSTANTIATION_PRAGMA)

#endif /* ACE_HAS_EXPLICIT_TEMPLATE_INSTANTIATION */