Main Page | Namespace List | Class Hierarchy | Alphabetical List | Class List | File List | Class Members | File Members | Search for 

TAO_CEC_ProxyPullSupplier Class Reference

ProxyPullSupplier. More...

#include <CEC_ProxyPullSupplier.h>

Collaboration diagram for TAO_CEC_ProxyPullSupplier:

Collaboration graph
[legend]
List of all members.

Public Types

typedef CosEventChannelAdmin::ProxyPullSupplier_ptr _ptr_type
typedef CosEventChannelAdmin::ProxyPullSupplier_var _var_type

Public Member Functions

 TAO_CEC_ProxyPullSupplier (TAO_CEC_EventChannel *event_channel, const ACE_Time_Value &timeout)
 constructor...

virtual ~TAO_CEC_ProxyPullSupplier (void)
 destructor...

virtual void activate (CosEventChannelAdmin::ProxyPullSupplier_ptr &activated_proxy)
 Activate in the POA.

virtual void deactivate (void)
 Deactivate from the POA.

CORBA::Boolean is_connected (void) const
 Return 0 if no consumer is connected...

CosEventComm::PullConsumer_ptr consumer (void) const
virtual void shutdown (void)
 The event channel is shutting down.

CORBA::Boolean consumer_non_existent (CORBA::Boolean_out disconnected)
void push (const CORBA::Any &event)
 Push an event into the queue.

virtual void connect_pull_consumer (CosEventComm::PullConsumer_ptr pull_consumer)
virtual CORBA::Any * pull (void)
virtual CORBA::Any * try_pull (CORBA::Boolean_out has_event)
virtual void disconnect_pull_supplier (void)
CORBA::ULong _incr_refcnt (void)
 Increment and decrement the reference count.

CORBA::ULong _decr_refcnt (void)
virtual PortableServer::POA_ptr _default_POA (void)
virtual void _add_ref (void)
virtual void _remove_ref (void)

Protected Member Functions

void consumer (CosEventComm::PullConsumer_ptr consumer)
void consumer_i (CosEventComm::PullConsumer_ptr consumer)
CORBA::Boolean is_connected_i (void) const
 The private version (without locking) of is_connected().

void cleanup_i (void)
 Release the child and the consumer.

CosEventComm::PullConsumer_ptr apply_policy (CosEventComm::PullConsumer_ptr c)

Private Attributes

TAO_CEC_EventChannel * event_channel_
 The Event Channel that owns this object.

ACE_Time_Value timeout_
ACE_Lock * lock_
 The locking strategy.

CORBA::ULong refcount_
 The reference count.

CosEventComm::PullConsumer_var consumer_
CosEventComm::PullConsumer_var nopolicy_consumer_
 The consumer without any policies applied.

int connected_
PortableServer::POA_var default_POA_
 Store the default POA.

TAO_SYNCH_MUTEX queue_lock_
 Use a message queue to pass the.

TAO_SYNCH_CONDITION wait_not_empty_
ACE_Unbounded_Queue< CORBA::Any > queue_

Detailed Description

ProxyPullSupplier.

Implement the CosEventChannelAdmin::ProxyPullSupplier interface, remember that this class is used to communicate with a PullConsumer, so, in effect, this is the ambassador for a consumer inside the event channel. = MEMORY MANAGMENT It does not assume ownership of the TAO_CEC_Dispatching object. It makes a copy of the ConsumerQOS and the consumer object reference. = LOCKING Locking is strategized, the event channel acts as a factory for the locking strategies.

Definition at line 53 of file CEC_ProxyPullSupplier.h.

Member Typedef Documentation

typedef CosEventChannelAdmin::ProxyPullSupplier_ptr TAO_CEC_ProxyPullSupplier::_ptr_type
 

Definition at line 56 of file CEC_ProxyPullSupplier.h.

typedef CosEventChannelAdmin::ProxyPullSupplier_var TAO_CEC_ProxyPullSupplier::_var_type
 

Definition at line 57 of file CEC_ProxyPullSupplier.h.

Constructor & Destructor Documentation

TAO_CEC_ProxyPullSupplier::TAO_CEC_ProxyPullSupplier (  TAO_CEC_EventChannel *  event_channel,
const ACE_Time_Value &  timeout
) 
 

constructor...

Definition at line 22 of file CEC_ProxyPullSupplier.cpp. 

00023   : event_channel_ (ec),
00024     timeout_ (timeout),
00025     refcount_ (1),
00026     connected_ (0),
00027     wait_not_empty_ (queue_lock_)
00028 {
00029   this->lock_ =
00030     this->event_channel_->create_supplier_lock ();
00031 
00032   this->default_POA_ =
00033     this->event_channel_->supplier_poa ();
00034 
00035   this->event_channel_->get_servant_retry_map ().bind (this, 0);
00036 }

TAO_CEC_ProxyPullSupplier::~TAO_CEC_ProxyPullSupplier (  void   )  [virtual]
 

destructor...

Definition at line 38 of file CEC_ProxyPullSupplier.cpp.

References TAO_CEC_EventChannel::destroy_supplier_lock(), and TAO_CEC_EventChannel::get_servant_retry_map(). 

00039 {
00040   this->event_channel_->get_servant_retry_map ().unbind (this);
00041   this->event_channel_->destroy_supplier_lock (this->lock_);
00042 }

Member Function Documentation

void TAO_CEC_ProxyPullSupplier::_add_ref (  void   )  [virtual]
 

Definition at line 345 of file CEC_ProxyPullSupplier.cpp.

References _incr_refcnt(). 

00346 {
00347   this->_incr_refcnt ();
00348 }

CORBA::ULong TAO_CEC_ProxyPullSupplier::_decr_refcnt (  void   ) 
 

Definition at line 214 of file CEC_ProxyPullSupplier.cpp.

References ACE_GUARD_RETURN, and TAO_CEC_EventChannel::destroy_proxy().

Referenced by _remove_ref(). 

00215 {
00216   {
00217     ACE_GUARD_RETURN (ACE_Lock, ace_mon, *this->lock_, 0);
00218     this->refcount_--;
00219     if (this->refcount_ != 0)
00220       return this->refcount_;
00221   }
00222 
00223   // Notify the event channel
00224   this->event_channel_->destroy_proxy (this);
00225   return 0;
00226 }

PortableServer::POA_ptr TAO_CEC_ProxyPullSupplier::_default_POA (  void   )  [virtual]
 

Definition at line 339 of file CEC_ProxyPullSupplier.cpp.

Referenced by deactivate(). 

00340 {
00341   return PortableServer::POA::_duplicate (this->default_POA_.in ());
00342 }

CORBA::ULong TAO_CEC_ProxyPullSupplier::_incr_refcnt (  void   ) 
 

Increment and decrement the reference count.

Definition at line 207 of file CEC_ProxyPullSupplier.cpp.

References ACE_GUARD_RETURN.

Referenced by _add_ref(). 

00208 {
00209   ACE_GUARD_RETURN (ACE_Lock, ace_mon, *this->lock_, 0);
00210   return this->refcount_++;
00211 }

void TAO_CEC_ProxyPullSupplier::_remove_ref (  void   )  [virtual]
 

Definition at line 351 of file CEC_ProxyPullSupplier.cpp.

References _decr_refcnt(). 

00352 {
00353   this->_decr_refcnt ();
00354 }

void TAO_CEC_ProxyPullSupplier::activate (  CosEventChannelAdmin::ProxyPullSupplier_ptr &  activated_proxy  )  [virtual]
 

Activate in the POA.

Definition at line 45 of file CEC_ProxyPullSupplier.cpp. 

00047 {
00048   CosEventChannelAdmin::ProxyPullSupplier_var result;
00049   try
00050     {
00051       result = this->_this ();
00052     }
00053   catch (const CORBA::Exception&)
00054     {
00055       result = CosEventChannelAdmin::ProxyPullSupplier::_nil ();
00056     }
00057   activated_proxy = result._retn ();
00058 }

CosEventComm::PullConsumer_ptr TAO_CEC_ProxyPullSupplier::apply_policy (  CosEventComm::PullConsumer_ptr  c  )  [protected]
 

Assigns the parameter to both consumer_ and nopolicy_consumer_, and applies policies (when appropriate) to consumer_.

Definition at line 271 of file CEC_ProxyPullSupplier.cpp.

References CORBA::is_nil(), and nopolicy_consumer_.

Referenced by connect_pull_consumer(). 

00272 {
00273   if (CORBA::is_nil (pre)) return pre;
00274   this->nopolicy_consumer_ = CosEventComm::PullConsumer::_duplicate (pre);
00275 #if defined (TAO_HAS_CORBA_MESSAGING) && TAO_HAS_CORBA_MESSAGING != 0
00276   CosEventComm::PullConsumer_var post =
00277     CosEventComm::PullConsumer::_duplicate (pre);
00278   if (this->timeout_ > ACE_Time_Value::zero)
00279     {
00280       CORBA::PolicyList policy_list;
00281       policy_list.length (1);
00282       policy_list[0] = this->event_channel_->
00283         create_roundtrip_timeout_policy (this->timeout_);
00284 
00285       CORBA::Object_var post_obj = pre->_set_policy_overrides
00286         (policy_list, CORBA::ADD_OVERRIDE);
00287       post = CosEventComm::PullConsumer::_narrow(post_obj.in ());
00288 
00289       policy_list[0]->destroy ();
00290       policy_list.length (0);
00291     }
00292   return post._retn ();
00293 #else
00294   return CosEventComm::PullConsumer::_duplicate (pre);
00295 #endif /* TAO_HAS_CORBA_MESSAGING */
00296 }

void TAO_CEC_ProxyPullSupplier::cleanup_i (  void   )  [protected]
 

Release the child and the consumer.

Definition at line 199 of file CEC_ProxyPullSupplier.cpp.

References connected_, and consumer_.

Referenced by connect_pull_consumer(), and disconnect_pull_supplier(). 

00200 {
00201   this->consumer_ =
00202     CosEventComm::PullConsumer::_nil ();
00203   this->connected_ = 0;
00204 }

void TAO_CEC_ProxyPullSupplier::connect_pull_consumer (  CosEventComm::PullConsumer_ptr  pull_consumer  )  [virtual]
 

Definition at line 229 of file CEC_ProxyPullSupplier.cpp.

References ACE_GUARD_THROW_EX, apply_policy(), cleanup_i(), TAO_CEC_EventChannel::connected(), connected_, consumer_, TAO_CEC_EventChannel::consumer_reconnect(), is_connected_i(), TAO_CEC_EventChannel::reconnected(), and TAO_CEC_Unlock. 

00231 {
00232   {
00233     ACE_GUARD_THROW_EX (
00234         ACE_Lock, ace_mon, *this->lock_,
00235         CORBA::INTERNAL ());
00236     // @@ CosEventChannelAdmin::EventChannel::SYNCHRONIZATION_ERROR ());
00237 
00238     if (this->is_connected_i ())
00239       {
00240         if (this->event_channel_->consumer_reconnect () == 0)
00241           throw CosEventChannelAdmin::AlreadyConnected ();
00242 
00243         // Re-connections are allowed....
00244         this->cleanup_i ();
00245 
00246         this->consumer_ = apply_policy (pull_consumer);
00247         this->connected_ = 1;
00248 
00249         TAO_CEC_Unlock reverse_lock (*this->lock_);
00250 
00251         {
00252           ACE_GUARD_THROW_EX (
00253               TAO_CEC_Unlock, ace_mon, reverse_lock,
00254               CORBA::INTERNAL ());
00255           // @@ CosEventChannelAdmin::EventChannel::SYNCHRONIZATION_ERROR ());
00256 
00257           this->event_channel_->reconnected (this);
00258         }
00259         return;
00260       }
00261 
00262     this->consumer_ = apply_policy (pull_consumer);
00263     this->connected_ = 1;
00264   }
00265 
00266   // Notify the event channel...
00267   this->event_channel_->connected (this);
00268 }

ACE_INLINE void TAO_CEC_ProxyPullSupplier::consumer (  CosEventComm::PullConsumer_ptr  consumer  )  [protected]
 

Set the consumer, used by some implementations to change the policies used when invoking operations on the consumer.

Definition at line 36 of file CEC_ProxyPullSupplier.inl.

References ACE_GUARD, and consumer_i(). 

00037 {
00038   ACE_GUARD (ACE_Lock, ace_mon, *this->lock_);
00039 
00040   this->consumer_i (consumer);
00041 }

ACE_INLINE CosEventComm::PullConsumer_ptr TAO_CEC_ProxyPullSupplier::consumer (  void   )  const
 

Return the consumer object reference. It returns nil() if it has not connected yet. NOTE: This method does not return a new reference!!! Doing so will increase the locking overhead on the critical path.

Definition at line 22 of file CEC_ProxyPullSupplier.inl.

References ACE_GUARD_RETURN, and consumer_.

Referenced by consumer_non_existent(), disconnect_pull_supplier(), and shutdown(). 

00023 {
00024   ACE_GUARD_RETURN (ACE_Lock, ace_mon, *this->lock_, 0);
00025 
00026   return this->consumer_.in ();
00027 }

ACE_INLINE void TAO_CEC_ProxyPullSupplier::consumer_i (  CosEventComm::PullConsumer_ptr  consumer  )  [protected]
 

Definition at line 30 of file CEC_ProxyPullSupplier.inl.

References consumer_.

Referenced by consumer(). 

00031 {
00032   this->consumer_ = consumer;
00033 }

CORBA::Boolean TAO_CEC_ProxyPullSupplier::consumer_non_existent (  CORBA::Boolean_out  disconnected  ) 
 

Invoke the _non_existent() pseudo-operation on the consumer. If it is disconnected then it returns true and sets the flag.

Definition at line 113 of file CEC_ProxyPullSupplier.cpp.

References CORBA::Object::_duplicate(), ACE_GUARD_THROW_EX, consumer(), is_connected_i(), and CORBA::is_nil().

Referenced by TAO_CEC_Ping_Pull_Consumer::work(). 

00115 {
00116   CORBA::Object_var consumer;
00117   {
00118     ACE_GUARD_THROW_EX (
00119         ACE_Lock, ace_mon, *this->lock_,
00120         CORBA::INTERNAL ());
00121 
00122     disconnected = 0;
00123     if (this->is_connected_i () == 0)
00124       {
00125         disconnected = 1;
00126         return 0;
00127       }
00128     if (CORBA::is_nil (this->nopolicy_consumer_.in ()))
00129       {
00130         return 0;
00131       }
00132     consumer = CORBA::Object::_duplicate (this->nopolicy_consumer_.in ());
00133   }
00134 
00135 #if (TAO_HAS_MINIMUM_CORBA == 0)
00136   return consumer->_non_existent ();
00137 #else
00138   return 0;
00139 #endif /* TAO_HAS_MINIMUM_CORBA */
00140 }

void TAO_CEC_ProxyPullSupplier::deactivate (  void   )  [virtual]
 

Deactivate from the POA.

Definition at line 61 of file CEC_ProxyPullSupplier.cpp.

References _default_POA().

Referenced by shutdown(). 

00062 {
00063   try
00064     {
00065       PortableServer::POA_var poa =
00066         this->_default_POA ();
00067       PortableServer::ObjectId_var id =
00068         poa->servant_to_id (this);
00069       poa->deactivate_object (id.in ());
00070     }
00071   catch (const CORBA::Exception&)
00072     {
00073       // Exceptions here should not be propagated.  They usually
00074       // indicate that an object is beign disconnected twice, or some
00075       // race condition, but not a fault that the user needs to know
00076       // about.
00077     }
00078 }

void TAO_CEC_ProxyPullSupplier::disconnect_pull_supplier (  void   )  [virtual]
 

Definition at line 299 of file CEC_ProxyPullSupplier.cpp.

References ACE_GUARD_THROW_EX, cleanup_i(), consumer(), consumer_, TAO_CEC_EventChannel::disconnect_callbacks(), TAO_CEC_EventChannel::disconnected(), is_connected_i(), and CORBA::is_nil().

Referenced by TAO_CEC_Reactive_ConsumerControl::consumer_not_exist(). 

00300 {
00301   CosEventComm::PullConsumer_var consumer;
00302 
00303   {
00304     ACE_GUARD_THROW_EX (
00305         ACE_Lock, ace_mon, *this->lock_,
00306         CORBA::INTERNAL ());
00307     // @@ CosEventChannelAdmin::EventChannel::SYNCHRONIZATION_ERROR ());
00308 
00309     if (this->is_connected_i () == 0)
00310       throw CORBA::BAD_INV_ORDER ();
00311 
00312     consumer = this->consumer_._retn ();
00313 
00314     this->cleanup_i ();
00315   }
00316 
00317   // Notify the event channel....
00318   this->event_channel_->disconnected (this);
00319 
00320   if (CORBA::is_nil (consumer.in ()))
00321     return;
00322 
00323   if (this->event_channel_->disconnect_callbacks ())
00324     {
00325       try
00326         {
00327           consumer->disconnect_pull_consumer ();
00328         }
00329       catch (const CORBA::Exception& ex)
00330         {
00331           // Ignore exceptions, we must isolate other clients from
00332           // problems on this one.
00333           ex._tao_print_exception ("ProxySupplier::disconnect_pull_supplier");
00334         }
00335     }
00336 }

ACE_INLINE CORBA::Boolean TAO_CEC_ProxyPullSupplier::is_connected (  void   )  const
 

Return 0 if no consumer is connected...

Definition at line 14 of file CEC_ProxyPullSupplier.inl.

References ACE_GUARD_RETURN, and is_connected_i().

Referenced by pull(), push(), and try_pull(). 

00015 {
00016   ACE_GUARD_RETURN (ACE_Lock, ace_mon, *this->lock_, 0);
00017 
00018   return this->is_connected_i ();
00019 }

TAO_BEGIN_VERSIONED_NAMESPACE_DECL ACE_INLINE CORBA::Boolean TAO_CEC_ProxyPullSupplier::is_connected_i (  void   )  const [protected]
 

The private version (without locking) of is_connected().

Definition at line 8 of file CEC_ProxyPullSupplier.inl.

References connected_.

Referenced by connect_pull_consumer(), consumer_non_existent(), disconnect_pull_supplier(), and is_connected(). 

00009 {
00010   return this->connected_;
00011 }

CORBA::Any * TAO_CEC_ProxyPullSupplier::pull (  void   )  [virtual]
 

Definition at line 157 of file CEC_ProxyPullSupplier.cpp.

References ACE_GUARD_RETURN, is_connected(), queue_lock_, TAO_SYNCH_MUTEX, and wait_not_empty_. 

00158 {
00159   if (this->is_connected () == 0)
00160     throw CosEventComm::Disconnected ();
00161 
00162   ACE_GUARD_RETURN (TAO_SYNCH_MUTEX, ace_mon, queue_lock_, 0);
00163   while (this->queue_.is_empty ())
00164     {
00165       this->wait_not_empty_.wait ();
00166     }
00167   CORBA::Any any;
00168   if (this->queue_.dequeue_head (any) != 0)
00169     {
00170       throw CORBA::INTERNAL ();
00171     }
00172   return new CORBA::Any (any);
00173 }

void TAO_CEC_ProxyPullSupplier::push (  const CORBA::Any &  event  ) 
 

Push an event into the queue.

Definition at line 143 of file CEC_ProxyPullSupplier.cpp.

References ACE_GUARD, is_connected(), TAO_SYNCH_MUTEX, and wait_not_empty_.

Referenced by TAO_CEC_Propagate_Event_Pull::work(). 

00144 {
00145   if (this->is_connected () == 0)
00146     return;
00147 
00148   ACE_GUARD (TAO_SYNCH_MUTEX, ace_mon, this->queue_lock_);
00149 
00150   // Ignore errors
00151   (void) this->queue_.enqueue_tail (event);
00152 
00153   this->wait_not_empty_.signal ();
00154 }

void TAO_CEC_ProxyPullSupplier::shutdown (  void   )  [virtual]
 

The event channel is shutting down.

Definition at line 81 of file CEC_ProxyPullSupplier.cpp.

References ACE_GUARD_THROW_EX, consumer(), consumer_, deactivate(), and CORBA::is_nil(). 

00082 {
00083   // Save the consumer we where connected to, we need to send a
00084   // disconnect message to it.
00085   CosEventComm::PullConsumer_var consumer;
00086 
00087   {
00088     ACE_GUARD_THROW_EX (
00089         ACE_Lock, ace_mon, *this->lock_,
00090         CORBA::INTERNAL ());
00091     // @@ CosEventChannelAdmin::EventChannel::SYNCHRONIZATION_ERROR ());
00092 
00093     consumer = this->consumer_._retn ();
00094   }
00095 
00096   this->deactivate ();
00097 
00098   if (CORBA::is_nil (consumer.in ()))
00099     return;
00100 
00101   try
00102     {
00103       consumer->disconnect_pull_consumer ();
00104     }
00105   catch (const CORBA::Exception&)
00106     {
00107       // Ignore exceptions, we must isolate other clients from
00108       // problems on this one.
00109     }
00110 }

CORBA::Any * TAO_CEC_ProxyPullSupplier::try_pull (  CORBA::Boolean_out  has_event  )  [virtual]
 

Definition at line 176 of file CEC_ProxyPullSupplier.cpp.

References ACE_GUARD_RETURN, is_connected(), CORBA::Long, queue_lock_, and TAO_SYNCH_MUTEX. 

00177 {
00178   has_event = 0;
00179   if (this->is_connected () == 0)
00180     throw CosEventComm::Disconnected ();
00181 
00182   ACE_GUARD_RETURN (TAO_SYNCH_MUTEX, ace_mon, queue_lock_, 0);
00183   CORBA::Any any;
00184   if (this->queue_.is_empty ())
00185     {
00186       any <<= CORBA::Long(0);
00187       return new CORBA::Any (any);
00188     }
00189 
00190   if (this->queue_.dequeue_head (any) != 0)
00191     {
00192       throw CORBA::INTERNAL ();
00193     }
00194   has_event = 1;
00195   return new CORBA::Any (any);
00196 }

Member Data Documentation

int TAO_CEC_ProxyPullSupplier::connected_ [private]
 

If the flag is not zero then we are connected, notice that the consumer can be nil.

Definition at line 151 of file CEC_ProxyPullSupplier.h.

Referenced by cleanup_i(), connect_pull_consumer(), and is_connected_i().

CosEventComm::PullConsumer_var TAO_CEC_ProxyPullSupplier::consumer_ [private]
 

The consumer -- use apply_policy() instead of assigning directly to consumer_. This will keep consumer_ and nopolicy_consumer_ in sync.

Definition at line 144 of file CEC_ProxyPullSupplier.h.

Referenced by cleanup_i(), connect_pull_consumer(), consumer(), consumer_i(), disconnect_pull_supplier(), and shutdown().

PortableServer::POA_var TAO_CEC_ProxyPullSupplier::default_POA_ [private]
 

Store the default POA.

Definition at line 154 of file CEC_ProxyPullSupplier.h.

TAO_CEC_EventChannel* TAO_CEC_ProxyPullSupplier::event_channel_ [private]
 

The Event Channel that owns this object.

Definition at line 132 of file CEC_ProxyPullSupplier.h.

ACE_Lock* TAO_CEC_ProxyPullSupplier::lock_ [private]
 

The locking strategy.

Definition at line 137 of file CEC_ProxyPullSupplier.h.

CosEventComm::PullConsumer_var TAO_CEC_ProxyPullSupplier::nopolicy_consumer_ [private]
 

The consumer without any policies applied.

Definition at line 147 of file CEC_ProxyPullSupplier.h.

Referenced by apply_policy().

ACE_Unbounded_Queue<CORBA::Any> TAO_CEC_ProxyPullSupplier::queue_ [private]
 

Definition at line 159 of file CEC_ProxyPullSupplier.h.

TAO_SYNCH_MUTEX TAO_CEC_ProxyPullSupplier::queue_lock_ [private]
 

Use a message queue to pass the.

Definition at line 157 of file CEC_ProxyPullSupplier.h.

Referenced by pull(), and try_pull().

CORBA::ULong TAO_CEC_ProxyPullSupplier::refcount_ [private]
 

The reference count.

Definition at line 140 of file CEC_ProxyPullSupplier.h.

ACE_Time_Value TAO_CEC_ProxyPullSupplier::timeout_ [private]
 

Definition at line 134 of file CEC_ProxyPullSupplier.h.

TAO_SYNCH_CONDITION TAO_CEC_ProxyPullSupplier::wait_not_empty_ [private]
 

Definition at line 158 of file CEC_ProxyPullSupplier.h.

Referenced by pull(), and push().

The documentation for this class was generated from the following files:
Generated on Sun Jan 27 15:37:48 2008 for TAO_CosEvent by doxygen 1.3.6