TAO_RTEvent  2.0.6
Public Types | Public Member Functions | Protected Member Functions | Protected Attributes | Private Member Functions
TAO_EC_ProxyPushSupplier Class Reference

ProxyPushSupplier. More...

#include <EC_ProxySupplier.h>

Inheritance diagram for TAO_EC_ProxyPushSupplier:
Inheritance graph
[legend]
Collaboration diagram for TAO_EC_ProxyPushSupplier:
Collaboration graph
[legend]

List of all members.

Public Types

typedef
RtecEventChannelAdmin::ProxyPushSupplier 
Interface
typedef
RtecEventChannelAdmin::ProxyPushSupplier_var 
_var_type
typedef
RtecEventChannelAdmin::ProxyPushSupplier_ptr 
_ptr_type

Public Member Functions

 TAO_EC_ProxyPushSupplier (TAO_EC_Event_Channel_Base *event_channel, int validate_connection)
 Constructor...
virtual ~TAO_EC_ProxyPushSupplier (void)
 Destructor...
virtual void activate (RtecEventChannelAdmin::ProxyPushSupplier_ptr &proxy)=0
 Activate in the POA.
virtual void deactivate (void) throw ()
 Deactivate from the POA.
virtual void disconnect_push_supplier ()=0
 Disconnect this from.
CORBA::Boolean is_connected (void) const
 Return false if no consumer is connected...
CORBA::Boolean is_suspended (void) const
 Return true if it is suspended.
RtecEventComm::PushConsumer_ptr consumer (void) const
const
RtecEventChannelAdmin::ConsumerQOS
subscriptions (void) const
 The QoS (subscription) used to connect to the EC.
virtual void connected (TAO_EC_ProxyPushConsumer *consumer)
virtual void reconnected (TAO_EC_ProxyPushConsumer *consumer)
virtual void disconnected (TAO_EC_ProxyPushConsumer *consumer)
virtual void connected (TAO_EC_ProxyPushSupplier *supplier)
virtual void reconnected (TAO_EC_ProxyPushSupplier *supplier)
virtual void disconnected (TAO_EC_ProxyPushSupplier *supplier)
virtual void shutdown (void)
 The event channel is shutting down.
void push_to_consumer (RtecEventComm::PushConsumer_ptr consumer, const RtecEventComm::EventSet &event)
void reactive_push_to_consumer (RtecEventComm::PushConsumer_ptr consumer, const RtecEventComm::EventSet &event)
CORBA::Boolean consumer_non_existent (CORBA::Boolean_out disconnected)
CORBA::ULong _incr_refcnt (void)
 Increment and decrement the reference count.
CORBA::ULong _decr_refcnt (void)
virtual int filter (const RtecEventComm::EventSet &event, TAO_EC_QOS_Info &qos_info)
virtual int filter_nocopy (RtecEventComm::EventSet &event, TAO_EC_QOS_Info &qos_info)
virtual void push (const RtecEventComm::EventSet &event, TAO_EC_QOS_Info &qos_info)
virtual void push_nocopy (RtecEventComm::EventSet &event, TAO_EC_QOS_Info &qos_info)
virtual void clear (void)
virtual CORBA::ULong max_event_size (void) const
 Returns the maximum size of the events pushed by this filter.
virtual int can_match (const RtecEventComm::EventHeader &header) const
virtual int add_dependencies (const RtecEventComm::EventHeader &header, const TAO_EC_QOS_Info &qos_info)

Protected Member Functions

void consumer (RtecEventComm::PushConsumer_ptr consumer)
void consumer_i (RtecEventComm::PushConsumer_ptr consumer)
void suspend_connection_i (void)
void resume_connection_i (void)
void suspend_connection_locked (void)
void resume_connection_locked (void)
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.

Protected Attributes

TAO_EC_Event_Channel_Baseevent_channel_
 The Event Channel that owns this object.
ACE_Locklock_
 The locking strategy.
CORBA::ULong refcount_
 The reference count.
RtecEventComm::PushConsumer_var consumer_
 The consumer....
CORBA::Boolean suspended_
 Is this consumer suspended?
RtecEventChannelAdmin::ConsumerQOS qos_
 The subscription and QoS information...
PortableServer::POA_var default_POA_
 Store the default POA.
TAO_EC_Filterchild_
 The filter object.
int consumer_validate_connection_
 Validate the connection to consumer on connect.

Private Member Functions

virtual void refcount_zero_hook (void)
 Template method hooks.
virtual void pre_dispatch_hook (RtecEventComm::EventSet &)
virtual PortableServer::ObjectId object_id (void)=0

Detailed Description

ProxyPushSupplier.

Implement the RtecEventChannelAdmin::ProxyPushSupplier interface, remember that this class is used to communicate with a PushConsumer, so, in effect, this is the ambassador for a consumer inside the event channel.

Memory Management

It does not assume ownership of the TAO_EC_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.

Todo:
We don't need to provide a trivial filter, the object itself could short-circuit the filter() ---> push() cycle when the EC is properly configured, we need to explore this...

Member Typedef Documentation

typedef RtecEventChannelAdmin::ProxyPushSupplier_ptr TAO_EC_ProxyPushSupplier::_ptr_type
typedef RtecEventChannelAdmin::ProxyPushSupplier_var TAO_EC_ProxyPushSupplier::_var_type

Constructor & Destructor Documentation

TAO_EC_ProxyPushSupplier::TAO_EC_ProxyPushSupplier ( TAO_EC_Event_Channel_Base event_channel,
int  validate_connection 
)

Constructor...

TAO_EC_ProxyPushSupplier::~TAO_EC_ProxyPushSupplier ( void  ) [virtual]

Destructor...


Member Function Documentation

CORBA::ULong TAO_EC_ProxyPushSupplier::_decr_refcnt ( void  )
CORBA::ULong TAO_EC_ProxyPushSupplier::_incr_refcnt ( void  )

Increment and decrement the reference count.

virtual void TAO_EC_ProxyPushSupplier::activate ( RtecEventChannelAdmin::ProxyPushSupplier_ptr &  proxy) [pure virtual]

Activate in the POA.

Implemented in TAO_EC_Default_ProxyPushSupplier.

int TAO_EC_ProxyPushSupplier::add_dependencies ( const RtecEventComm::EventHeader header,
const TAO_EC_QOS_Info qos_info 
) [virtual]

This is used for computing the scheduling dependencies:

Leaf filters check if the header could be matched, similar to the can_match() method; if it does they return 1, and 0 otherwise. Intermediate nodes always return 0.

This is used to build precise dependencies between the suppliers and the leaf of the filters that accept that event. Notice that only the nodes doing scheduling recurse through the list, so in configurations that do no require scheduling the recursion stops fairly soon.

Implements TAO_EC_Filter.

int TAO_EC_ProxyPushSupplier::can_match ( const RtecEventComm::EventHeader header) const [virtual]

Returns 0 if an event with that header could never be accepted. This can used by the suppliers to filter out consumers that couldn't possibly be interested in their events. The rt_info and

Implements TAO_EC_Filter.

void TAO_EC_ProxyPushSupplier::cleanup_i ( void  ) [protected]

Release the child and the consumer.

void TAO_EC_ProxyPushSupplier::clear ( void  ) [virtual]

Clear any saved state, must reset and assume no events have been received.

Implements TAO_EC_Filter.

void TAO_EC_ProxyPushSupplier::connected ( TAO_EC_ProxyPushConsumer consumer) [virtual]

Concrete implementations can use this methods to keep track of the suppliers that publish its events.

void TAO_EC_ProxyPushSupplier::connected ( TAO_EC_ProxyPushSupplier supplier) [virtual]

Usually implemented as no-ops, but some configurations may require this methods.

RtecEventComm::PushConsumer_ptr TAO_EC_ProxyPushSupplier::consumer ( void  ) const

Return the consumer object reference. It returns nil() if it has not connected yet.

void TAO_EC_ProxyPushSupplier::consumer ( RtecEventComm::PushConsumer_ptr  consumer) [protected]

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

void TAO_EC_ProxyPushSupplier::consumer_i ( RtecEventComm::PushConsumer_ptr  consumer) [protected]
CORBA::Boolean TAO_EC_ProxyPushSupplier::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 <disconnected> flag.

void TAO_EC_ProxyPushSupplier::deactivate ( void  ) throw () [virtual]

Deactivate from the POA.

virtual void TAO_EC_ProxyPushSupplier::disconnect_push_supplier ( ) [pure virtual]

Disconnect this from.

Implemented in TAO_EC_Default_ProxyPushSupplier, and TAO_EC_TPC_ProxyPushSupplier.

void TAO_EC_ProxyPushSupplier::disconnected ( TAO_EC_ProxyPushConsumer consumer) [virtual]
void TAO_EC_ProxyPushSupplier::disconnected ( TAO_EC_ProxyPushSupplier supplier) [virtual]
int TAO_EC_ProxyPushSupplier::filter ( const RtecEventComm::EventSet event,
TAO_EC_QOS_Info qos_info 
) [virtual]

Filter this event, returns 1 if the event is accepted, 0 otherwise. Notice that there are two versions of the method, if the event is not const then filter can take ownership of the event.

Attention:
There seems to be a disparity in interfaces: Supplier always push event sets of size 1 to the EC_ProxyPushSupplier, and EC_Filters do not implement handling of sets of more than 1 event. Then, why is this not enforced by the interface by having EC_ProxyPushSupplier take an event rather than a set?

Implements TAO_EC_Filter.

int TAO_EC_ProxyPushSupplier::filter_nocopy ( RtecEventComm::EventSet event,
TAO_EC_QOS_Info qos_info 
) [virtual]

Implements TAO_EC_Filter.

CORBA::Boolean TAO_EC_ProxyPushSupplier::is_connected ( void  ) const

Return false if no consumer is connected...

CORBA::Boolean TAO_EC_ProxyPushSupplier::is_connected_i ( void  ) const [protected]

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

CORBA::Boolean TAO_EC_ProxyPushSupplier::is_suspended ( void  ) const

Return true if it is suspended.

CORBA::ULong TAO_EC_ProxyPushSupplier::max_event_size ( void  ) const [virtual]

Returns the maximum size of the events pushed by this filter.

Implements TAO_EC_Filter.

virtual PortableServer::ObjectId TAO_EC_ProxyPushSupplier::object_id ( void  ) [private, pure virtual]
void TAO_EC_ProxyPushSupplier::pre_dispatch_hook ( RtecEventComm::EventSet ) [private, virtual]
void TAO_EC_ProxyPushSupplier::push ( const RtecEventComm::EventSet event,
TAO_EC_QOS_Info qos_info 
) [virtual]

This is called by the children when they accept an event and which to pass it up. Notice that there are two versions of the method, if the event is not const then filter can take ownership of the event.

Implements TAO_EC_Filter.

void TAO_EC_ProxyPushSupplier::push_nocopy ( RtecEventComm::EventSet event,
TAO_EC_QOS_Info qos_info 
) [virtual]

Implements TAO_EC_Filter.

void TAO_EC_ProxyPushSupplier::push_to_consumer ( RtecEventComm::PushConsumer_ptr  consumer,
const RtecEventComm::EventSet event 
)

Pushes to the consumer, verifies that it is connected and that it is not suspended. These methods take consumer argument because during the time the filters have been processing the event, this proxy's consumer may have changed.

void TAO_EC_ProxyPushSupplier::reactive_push_to_consumer ( RtecEventComm::PushConsumer_ptr  consumer,
const RtecEventComm::EventSet event 
)
void TAO_EC_ProxyPushSupplier::reconnected ( TAO_EC_ProxyPushConsumer consumer) [virtual]
void TAO_EC_ProxyPushSupplier::reconnected ( TAO_EC_ProxyPushSupplier supplier) [virtual]
void TAO_EC_ProxyPushSupplier::refcount_zero_hook ( void  ) [private, virtual]

Template method hooks.

void TAO_EC_ProxyPushSupplier::resume_connection_i ( void  ) [protected]
void TAO_EC_ProxyPushSupplier::resume_connection_locked ( void  ) [protected]
void TAO_EC_ProxyPushSupplier::shutdown ( void  ) [virtual]

The event channel is shutting down.

const RtecEventChannelAdmin::ConsumerQOS & TAO_EC_ProxyPushSupplier::subscriptions ( void  ) const

The QoS (subscription) used to connect to the EC.

void TAO_EC_ProxyPushSupplier::suspend_connection_i ( void  ) [protected]
void TAO_EC_ProxyPushSupplier::suspend_connection_locked ( void  ) [protected]

Member Data Documentation

The filter object.

RtecEventComm::PushConsumer_var TAO_EC_ProxyPushSupplier::consumer_ [protected]

The consumer....

Validate the connection to consumer on connect.

Store the default POA.

The Event Channel that owns this object.

The locking strategy.

The subscription and QoS information...

The reference count.

Is this consumer suspended?


The documentation for this class was generated from the following files:
 All Classes Namespaces Files Functions Variables Typedefs Enumerations Enumerator Friends Defines