diff options
Diffstat (limited to 'trunk/TAO/orbsvcs/orbsvcs/CosEvent/CEC_ProxyPullConsumer.cpp')
| -rw-r--r-- | trunk/TAO/orbsvcs/orbsvcs/CosEvent/CEC_ProxyPullConsumer.cpp | 423 |
1 files changed, 423 insertions, 0 deletions
diff --git a/trunk/TAO/orbsvcs/orbsvcs/CosEvent/CEC_ProxyPullConsumer.cpp b/trunk/TAO/orbsvcs/orbsvcs/CosEvent/CEC_ProxyPullConsumer.cpp new file mode 100644 index 00000000000..ba48e98cea8 --- /dev/null +++ b/trunk/TAO/orbsvcs/orbsvcs/CosEvent/CEC_ProxyPullConsumer.cpp @@ -0,0 +1,423 @@ +// $Id$ + +#include "orbsvcs/CosEvent/CEC_ProxyPullConsumer.h" +#include "orbsvcs/CosEvent/CEC_EventChannel.h" +#include "orbsvcs/CosEvent/CEC_ConsumerAdmin.h" +#include "orbsvcs/CosEvent/CEC_SupplierControl.h" +#include "orbsvcs/CosEvent/CEC_ProxyPullSupplier.h" + +#include "ace/Reverse_Lock_T.h" + +#if ! defined (__ACE_INLINE__) +#include "orbsvcs/CosEvent/CEC_ProxyPullConsumer.inl" +#endif /* __ACE_INLINE__ */ + +ACE_RCSID (CosEvent, + CEC_ProxyPullConsumer, + "$Id$") + +TAO_BEGIN_VERSIONED_NAMESPACE_DECL + +typedef ACE_Reverse_Lock<ACE_Lock> TAO_CEC_Unlock; + +TAO_CEC_ProxyPullConsumer:: +TAO_CEC_ProxyPullConsumer (TAO_CEC_EventChannel* ec, + const ACE_Time_Value &timeout) + : event_channel_ (ec), + timeout_ (timeout), + refcount_ (1) +{ + this->lock_ = + this->event_channel_->create_consumer_lock (); + + this->default_POA_ = + this->event_channel_->consumer_poa (); + + this->event_channel_->get_servant_retry_map ().bind (this, 0); +} + +TAO_CEC_ProxyPullConsumer::~TAO_CEC_ProxyPullConsumer (void) +{ + this->event_channel_->get_servant_retry_map ().unbind (this); + this->event_channel_->destroy_consumer_lock (this->lock_); +} + +void +TAO_CEC_ProxyPullConsumer::activate ( + CosEventChannelAdmin::ProxyPullConsumer_ptr &activated_proxy + ACE_ENV_ARG_DECL) + ACE_THROW_SPEC ((CORBA::SystemException)) +{ + CosEventChannelAdmin::ProxyPullConsumer_var result; + ACE_TRY + { + result = this->_this (ACE_ENV_SINGLE_ARG_PARAMETER); + ACE_TRY_CHECK; + } + ACE_CATCHANY + { + result = CosEventChannelAdmin::ProxyPullConsumer::_nil (); + } + ACE_ENDTRY; + activated_proxy = result._retn (); +} + +void +TAO_CEC_ProxyPullConsumer::deactivate (ACE_ENV_SINGLE_ARG_DECL) + ACE_THROW_SPEC ((CORBA::SystemException)) +{ + ACE_TRY + { + PortableServer::POA_var poa = + this->_default_POA (ACE_ENV_SINGLE_ARG_PARAMETER); + ACE_TRY_CHECK; + PortableServer::ObjectId_var id = + poa->servant_to_id (this ACE_ENV_ARG_PARAMETER); + ACE_TRY_CHECK; + poa->deactivate_object (id.in () ACE_ENV_ARG_PARAMETER); + ACE_TRY_CHECK; + } + ACE_CATCHANY + { + // Exceptions here should not be propagated. They usually + // indicate that an object is beign disconnected twice, or some + // race condition, but not a fault that the user needs to know + // about. + } + ACE_ENDTRY; +} + +// NOTE: There is some amount of duplicated code here, but it is +// intentional. Mainly we want to avoid locking overhead when +// possible, thus the code flow is optimized for that case more than +// for small code. + +CORBA::Any* +TAO_CEC_ProxyPullConsumer::try_pull_from_supplier ( + CORBA::Boolean_out has_event + ACE_ENV_ARG_DECL) +{ + has_event = 0; + CosEventComm::PullSupplier_var supplier; + { + ACE_GUARD_THROW_EX ( + ACE_Lock, ace_mon, *this->lock_, + CORBA::INTERNAL ()); + // @@ CosEventChannelAdmin::EventChannel::SYNCHRONIZATION_ERROR ()); + ACE_CHECK_RETURN (0); + + if (this->is_connected_i () == 0) + return 0; // ACE_THROW (CosEventComm::Disconnected ());???? + + supplier = + CosEventComm::PullSupplier::_duplicate (this->supplier_.in ()); + + // The refcount cannot be zero, because we have at least two + // references, + } + + CORBA::Any_var any; + TAO_CEC_SupplierControl *control = + this->event_channel_->supplier_control (); + + ACE_TRY + { + any = supplier->try_pull (has_event ACE_ENV_ARG_PARAMETER); + ACE_TRY_CHECK; + + // Inform the control that we got something from the supplier + control->successful_transmission(this); + } + ACE_CATCH (CORBA::OBJECT_NOT_EXIST, ex) + { + control->supplier_not_exist (this ACE_ENV_ARG_PARAMETER); + ACE_TRY_CHECK; + } + ACE_CATCH (CORBA::SystemException, sysex) + { + control->system_exception (this, + sysex + ACE_ENV_ARG_PARAMETER); + ACE_TRY_CHECK; + } + ACE_CATCHANY + { + // @@ Should not happen + } + ACE_ENDTRY; + return any._retn (); +} + +CORBA::Any* +TAO_CEC_ProxyPullConsumer::pull_from_supplier ( + ACE_ENV_SINGLE_ARG_DECL) +{ + CosEventComm::PullSupplier_var supplier; + { + ACE_GUARD_THROW_EX ( + ACE_Lock, ace_mon, *this->lock_, + CORBA::INTERNAL ()); + // @@ CosEventChannelAdmin::EventChannel::SYNCHRONIZATION_ERROR ()); + ACE_CHECK_RETURN (0); + + if (this->is_connected_i () == 0) + return 0; // ACE_THROW (CosEventComm::Disconnected ());???? + + supplier = + CosEventComm::PullSupplier::_duplicate (this->supplier_.in ()); + + // The refcount cannot be zero, because we have at least two + // references, + } + + CORBA::Any_var any; + ACE_TRY + { + any = supplier->pull (ACE_ENV_SINGLE_ARG_PARAMETER); + ACE_TRY_CHECK; + } + ACE_CATCHANY + { + // @@ This is where the policies for misbehaving suppliers + // should kick in.... for the moment just ignore them. + } + ACE_ENDTRY; + return any._retn (); +} + +CORBA::Boolean +TAO_CEC_ProxyPullConsumer::supplier_non_existent ( + CORBA::Boolean_out disconnected + ACE_ENV_ARG_DECL) +{ + CORBA::Object_var supplier; + { + ACE_GUARD_THROW_EX ( + ACE_Lock, ace_mon, *this->lock_, + CORBA::INTERNAL ()); + ACE_CHECK_RETURN (0); + + disconnected = 0; + if (this->is_connected_i () == 0) + { + disconnected = 1; + return 0; + } + if (CORBA::is_nil (this->nopolicy_supplier_.in ())) + { + return 0; + } + supplier = CORBA::Object::_duplicate (this->nopolicy_supplier_.in ()); + } + +#if (TAO_HAS_MINIMUM_CORBA == 0) + return supplier->_non_existent (ACE_ENV_SINGLE_ARG_PARAMETER); +#else + return 0; +#endif /* TAO_HAS_MINIMUM_CORBA */ +} + +void +TAO_CEC_ProxyPullConsumer::shutdown (ACE_ENV_SINGLE_ARG_DECL) +{ + CosEventComm::PullSupplier_var supplier; + + { + ACE_GUARD_THROW_EX ( + ACE_Lock, ace_mon, *this->lock_, + CORBA::INTERNAL ()); + // @@ CosEventChannelAdmin::EventChannel::SYNCHRONIZATION_ERROR ()); + ACE_CHECK; + + supplier = this->supplier_._retn (); + } + + this->deactivate (ACE_ENV_SINGLE_ARG_PARAMETER); + ACE_CHECK; + + if (CORBA::is_nil (supplier.in ())) + return; + + ACE_TRY + { + supplier->disconnect_pull_supplier (ACE_ENV_SINGLE_ARG_PARAMETER); + ACE_TRY_CHECK; + } + ACE_CATCHANY + { + // Ignore exceptions, we must isolate other clients from + // failures on this one. + } + ACE_ENDTRY; +} + +void +TAO_CEC_ProxyPullConsumer::cleanup_i (void) +{ + this->supplier_ = + CosEventComm::PullSupplier::_nil (); +} + +CORBA::ULong +TAO_CEC_ProxyPullConsumer::_incr_refcnt (void) +{ + ACE_GUARD_RETURN (ACE_Lock, ace_mon, *this->lock_, 0); + return this->refcount_++; +} + +CORBA::ULong +TAO_CEC_ProxyPullConsumer::_decr_refcnt (void) +{ + { + ACE_GUARD_RETURN (ACE_Lock, ace_mon, *this->lock_, 0); + this->refcount_--; + if (this->refcount_ != 0) + return this->refcount_; + } + + // Notify the event channel + this->event_channel_->destroy_proxy (this); + return 0; +} + +void +TAO_CEC_ProxyPullConsumer::connect_pull_supplier ( + CosEventComm::PullSupplier_ptr pull_supplier + ACE_ENV_ARG_DECL) + ACE_THROW_SPEC ((CORBA::SystemException, + CosEventChannelAdmin::AlreadyConnected)) +{ + // Nil PullSuppliers are illegal + if (CORBA::is_nil (pull_supplier)) + ACE_THROW (CORBA::BAD_PARAM ()); + + { + ACE_GUARD_THROW_EX ( + ACE_Lock, ace_mon, *this->lock_, + CORBA::INTERNAL ()); + // @@ CosEventChannelAdmin::EventChannel::SYNCHRONIZATION_ERROR ()); + ACE_CHECK; + + if (this->is_connected_i ()) + { + if (this->event_channel_->supplier_reconnect () == 0) + ACE_THROW (CosEventChannelAdmin::AlreadyConnected ()); + + // Re-connections are allowed, go ahead and disconnect the + // consumer... + this->cleanup_i (); + + // @@ Please read the comments in CEC_ProxyPullSupplier about + // possible race conditions in this area... + TAO_CEC_Unlock reverse_lock (*this->lock_); + + { + ACE_GUARD_THROW_EX ( + TAO_CEC_Unlock, ace_mon, reverse_lock, + CORBA::INTERNAL ()); + // @@ CosEventChannelAdmin::EventChannel::SYNCHRONIZATION_ERROR ()); + ACE_CHECK; + + this->event_channel_->disconnected (this ACE_ENV_ARG_PARAMETER); + ACE_CHECK; + } + + // What if a second thread connected us after this? + if (this->is_connected_i ()) + return; + } + this->supplier_ = apply_policy (pull_supplier); + } + + // Notify the event channel... + this->event_channel_->connected (this ACE_ENV_ARG_PARAMETER); +} + +CosEventComm::PullSupplier_ptr +TAO_CEC_ProxyPullConsumer::apply_policy (CosEventComm::PullSupplier_ptr pre) +{ + this->nopolicy_supplier_ = CosEventComm::PullSupplier::_duplicate (pre); +#if defined (TAO_HAS_CORBA_MESSAGING) && TAO_HAS_CORBA_MESSAGING != 0 + CosEventComm::PullSupplier_var post = + CosEventComm::PullSupplier::_duplicate (pre); + if (this->timeout_ > ACE_Time_Value::zero) + { + CORBA::PolicyList policy_list; + policy_list.length (1); + policy_list[0] = this->event_channel_-> + create_roundtrip_timeout_policy (this->timeout_); + + CORBA::Object_var post_obj = pre->_set_policy_overrides + (policy_list, CORBA::ADD_OVERRIDE); + post = CosEventComm::PullSupplier::_narrow (post_obj.in ()); + + policy_list[0]->destroy (); + policy_list.length (0); + } + return post._retn (); +#else + return CosEventComm::PullSupplier::_duplicate (pre); +#endif /* TAO_HAS_CORBA_MESSAGING */ +} + +void +TAO_CEC_ProxyPullConsumer::disconnect_pull_consumer ( + ACE_ENV_SINGLE_ARG_DECL) + ACE_THROW_SPEC ((CORBA::SystemException)) +{ + CosEventComm::PullSupplier_var supplier; + + { + ACE_GUARD_THROW_EX ( + ACE_Lock, ace_mon, *this->lock_, + CORBA::INTERNAL ()); + // @@ CosEventChannelAdmin::EventChannel::SYNCHRONIZATION_ERROR ()); + ACE_CHECK; + + if (this->is_connected_i () == 0) + ACE_THROW (CORBA::BAD_INV_ORDER ()); // @@ add user exception? + + supplier = this->supplier_._retn (); + + this->cleanup_i (); + } + + // Notify the event channel... + this->event_channel_->disconnected (this ACE_ENV_ARG_PARAMETER); + ACE_CHECK; + + if (this->event_channel_->disconnect_callbacks ()) + { + ACE_TRY + { + supplier->disconnect_pull_supplier (ACE_ENV_SINGLE_ARG_PARAMETER); + ACE_TRY_CHECK; + } + ACE_CATCHANY + { + // Ignore exceptions, we must isolate other clients from + // failures on this one. + } + ACE_ENDTRY; + } +} + +PortableServer::POA_ptr +TAO_CEC_ProxyPullConsumer::_default_POA (ACE_ENV_SINGLE_ARG_DECL_NOT_USED) +{ + return PortableServer::POA::_duplicate (this->default_POA_.in ()); +} + +void +TAO_CEC_ProxyPullConsumer::_add_ref (ACE_ENV_SINGLE_ARG_DECL_NOT_USED) +{ + this->_incr_refcnt (); +} + +void +TAO_CEC_ProxyPullConsumer::_remove_ref (ACE_ENV_SINGLE_ARG_DECL_NOT_USED) +{ + this->_decr_refcnt (); +} + +TAO_END_VERSIONED_NAMESPACE_DECL |