Event Channel Gateway using IIOP. More...

#include <EC_Gateway_IIOP.h>

Inheritance diagram for TAO_EC_Gateway_IIOP:

Collaboration diagram for TAO_EC_Gateway_IIOP:

Public Member Functions
	TAO_EC_Gateway_IIOP (void)
virtual	~TAO_EC_Gateway_IIOP (void)
int	init (RtecEventChannelAdmin::EventChannel_ptr supplier_ec, RtecEventChannelAdmin::EventChannel_ptr consumer_ec)
void	disconnect_push_supplier (void)
	The channel is disconnecting.
void	disconnect_push_consumer (void)
	The channel is disconnecting.
void	push (const RtecEventComm::EventSet &events)
int	shutdown (void)
	Disconnect and shutdown the gateway.
virtual void	close (void)
virtual void	update_consumer (const RtecEventChannelAdmin::ConsumerQOS &sub)
virtual void	update_supplier (const RtecEventChannelAdmin::SupplierQOS &pub)
void	reconnect_consumer_ec (void)
CORBA::Boolean	consumer_ec_non_existent (CORBA::Boolean_out disconnected)
	Check whether the consumer event channel is non existent or not.
void	cleanup_consumer_proxies (void)
int	cleanup_consumer_ec (void)
int	cleanup_supplier_ec (void)
void	suspend_supplier_ec (void)
	Suspend the connection to the supplier ec.
void	resume_supplier_ec (void)
	Resume the connection to the supplier ec.
Protected Types
typedef ACE_Map_Manager < RtecEventComm::EventSourceID, RtecEventChannelAdmin::ProxyPushConsumer_ptr, ACE_Null_Mutex >	Consumer_Map
typedef ACE_Map_Iterator < RtecEventComm::EventSourceID, RtecEventChannelAdmin::ProxyPushConsumer_ptr, ACE_Null_Mutex >	Consumer_Map_Iterator
Protected Member Functions
int	init_i (RtecEventChannelAdmin::EventChannel_ptr supplier_ec, RtecEventChannelAdmin::EventChannel_ptr consumer_ec)
	Do the real work in init()
Protected Attributes
TAO_SYNCH_MUTEX	lock_
	Lock to synchronize internal changes.
CORBA::ULong	busy_count_
int	update_posted_
RtecEventChannelAdmin::ConsumerQOS	c_qos_
int	cleanup_posted_
int	supplier_ec_suspended_
RtecEventChannelAdmin::EventChannel_var	supplier_ec_
RtecEventChannelAdmin::EventChannel_var	consumer_ec_
	The event channel acting as consumer of this gateway.
RtecBase::handle_t	supplier_info_
	Our RT_Infos for the event channel that is the supplier.
RtecBase::handle_t	consumer_info_
	Our RT_Infos for the event channel that is the consumer.
ACE_PushConsumer_Adapter < TAO_EC_Gateway_IIOP >	consumer_
	Our consumer personality....
bool	consumer_is_active_
	If it is true then we must deactivate the consumer.
ACE_PushSupplier_Adapter < TAO_EC_Gateway_IIOP >	supplier_
	Our supplier personality....
bool	supplier_is_active_
	If it is true then we must deactivate the supplier.
Consumer_Map	consumer_proxy_map_
RtecEventChannelAdmin::ProxyPushConsumer_var	default_consumer_proxy_
RtecEventChannelAdmin::ProxyPushSupplier_var	supplier_proxy_
TAO_ECG_ConsumerEC_Control *	ec_control_
TAO_EC_Gateway_IIOP_Factory *	factory_
	The Gateway IIOP Factory for all the settings.
int	use_ttl_
	If 1, we use the TTL flags, if 0, we just ignore TTL.
int	use_consumer_proxy_map_
Private Member Functions
void	close_i (void)
void	disconnect_supplier_proxy_i (void)
	Disconnect the supplier proxy.
void	disconnect_consumer_proxies_i (void)
	Disconnect all consumer proxies.
void	cleanup_consumer_proxies_i (void)
	Remove all consumer proxies without calling disconnect on them.
void	update_consumer_i (const RtecEventChannelAdmin::ConsumerQOS &sub)
void	open_i (const RtecEventChannelAdmin::ConsumerQOS &sub)
	Create all connections to consumer ec and to supplier ec.
CORBA::Boolean	is_consumer_ec_connected_i (void) const
	Helper method to see if consumer ec is connected.
void	push_to_consumer (RtecEventChannelAdmin::ProxyPushConsumer_ptr consumer, const RtecEventComm::EventSet &event)
	Push the event to the consumer.
void	cleanup_consumer_ec_i (void)
void	cleanup_supplier_ec_i (void)

Detailed Description

Event Channel Gateway using IIOP.

This class mediates among two event channels, it connects as a consumer of events with a remote event channel, and as a supplier of events with the local EC. As a consumer it gives a QoS designed to only accept the events in which local consumers are interested. Eventually the local EC should create this object and compute its QoS in an automated manner; but this requires some way to filter out the peers registered as consumers, otherwise we will get loops in the QoS graph. It uses exactly the same set of events in the publications list when connected as a supplier.

Note:: An alternative implementation would be to register with the remote EC as a supplier, and then filter on the remote EC, but one of the objectives is to minimize network traffic. On the other hand the events will be pushed to remote consumers, event though they will be dropped upon receipt (due to the TTL field); IMHO this is another suggestion that the EC needs to know (somehow) which consumers are truly its peers in disguise.

Todo:: : The class makes an extra copy of the events, we need to investigate if closer collaboration with its collocated EC could be used to remove that copy.

Member Typedef Documentation

typedef ACE_Map_Manager<RtecEventComm::EventSourceID,RtecEventChannelAdmin::ProxyPushConsumer_ptr,ACE_Null_Mutex> TAO_EC_Gateway_IIOP::Consumer_Map

protected

typedef ACE_Map_Iterator<RtecEventComm::EventSourceID,RtecEventChannelAdmin::ProxyPushConsumer_ptr,ACE_Null_Mutex> TAO_EC_Gateway_IIOP::Consumer_Map_Iterator

protected

Constructor & Destructor Documentation

TAO_EC_Gateway_IIOP::TAO_EC_Gateway_IIOP ( void )

TAO_EC_Gateway_IIOP::~TAO_EC_Gateway_IIOP ( void )

virtual

Member Function Documentation

int TAO_EC_Gateway_IIOP::cleanup_consumer_ec ( void )

Cleanup the connection to the consumer ec. Doesn't call anything on the ec again, just set the object to nil

void TAO_EC_Gateway_IIOP::cleanup_consumer_ec_i ( void )

private

void TAO_EC_Gateway_IIOP::cleanup_consumer_proxies ( void )

Cleanup all consumer proxies we have without trying to tell the consumer that we are going to disconnect. This can be used to cleanup the consumer proxy administration in case we know that the consumers are all unreachable.

void TAO_EC_Gateway_IIOP::cleanup_consumer_proxies_i ( void )

private

Remove all consumer proxies without calling disconnect on them.

int TAO_EC_Gateway_IIOP::cleanup_supplier_ec ( void )

Cleanup the connection to the supplier ec. Doesn't call anything on the ec again, just set the object to nil

void TAO_EC_Gateway_IIOP::cleanup_supplier_ec_i ( void )

private

void TAO_EC_Gateway_IIOP::close ( void )

virtual

The gateway must disconnect from all the relevant event channels, or any other communication media (such as multicast groups).

Implements TAO_EC_Gateway.

void TAO_EC_Gateway_IIOP::close_i ( void )

private

CORBA::Boolean TAO_EC_Gateway_IIOP::consumer_ec_non_existent ( CORBA::Boolean_out disconnected )

Check whether the consumer event channel is non existent or not.

void TAO_EC_Gateway_IIOP::disconnect_consumer_proxies_i ( void )

private

Disconnect all consumer proxies.

void TAO_EC_Gateway_IIOP::disconnect_push_consumer ( void )

The channel is disconnecting.

void TAO_EC_Gateway_IIOP::disconnect_push_supplier ( void )

The channel is disconnecting.

void TAO_EC_Gateway_IIOP::disconnect_supplier_proxy_i ( void )

private

Disconnect the supplier proxy.

int TAO_EC_Gateway_IIOP::init	(	RtecEventChannelAdmin::EventChannel_ptr	supplier_ec,
		RtecEventChannelAdmin::EventChannel_ptr	consumer_ec
	)

To do its job this class requires to know the local and remote ECs it will connect to.

Returns:: 0 in case of success, -1 in case of failure

int TAO_EC_Gateway_IIOP::init_i	(	RtecEventChannelAdmin::EventChannel_ptr	supplier_ec,
		RtecEventChannelAdmin::EventChannel_ptr	consumer_ec
	)

protected

Do the real work in init()

CORBA::Boolean TAO_EC_Gateway_IIOP::is_consumer_ec_connected_i ( void ) const

private

Helper method to see if consumer ec is connected.

void TAO_EC_Gateway_IIOP::open_i ( const RtecEventChannelAdmin::ConsumerQOS & sub )

private

Create all connections to consumer ec and to supplier ec.

void TAO_EC_Gateway_IIOP::push ( const RtecEventComm::EventSet & events )

This is the consumer side behavior, it pushes the events to the local event channel.

void TAO_EC_Gateway_IIOP::push_to_consumer	(	RtecEventChannelAdmin::ProxyPushConsumer_ptr	consumer,
		const RtecEventComm::EventSet &	event
	)

private

Push the event to the consumer.

void TAO_EC_Gateway_IIOP::reconnect_consumer_ec ( void )

void TAO_EC_Gateway_IIOP::resume_supplier_ec ( void )

Resume the connection to the supplier ec.

int TAO_EC_Gateway_IIOP::shutdown ( void )

Disconnect and shutdown the gateway.

void TAO_EC_Gateway_IIOP::suspend_supplier_ec ( void )

Suspend the connection to the supplier ec.

void TAO_EC_Gateway_IIOP::update_consumer ( const RtecEventChannelAdmin::ConsumerQOS & sub )

virtual

void TAO_EC_Gateway_IIOP::update_consumer_i ( const RtecEventChannelAdmin::ConsumerQOS & sub )

private

void TAO_EC_Gateway_IIOP::update_supplier ( const RtecEventChannelAdmin::SupplierQOS & pub )

virtual

Member Data Documentation

CORBA::ULong TAO_EC_Gateway_IIOP::busy_count_

protected

How many threads are running push() we cannot make changes until that reaches 0

RtecEventChannelAdmin::ConsumerQOS TAO_EC_Gateway_IIOP::c_qos_

protected

int TAO_EC_Gateway_IIOP::cleanup_posted_

protected

We have a cleanup outstanding and must wait doing cleanup until all pushes are ready.

ACE_PushConsumer_Adapter<TAO_EC_Gateway_IIOP> TAO_EC_Gateway_IIOP::consumer_

protected

Our consumer personality....

RtecEventChannelAdmin::EventChannel_var TAO_EC_Gateway_IIOP::consumer_ec_

protected

The event channel acting as consumer of this gateway.

RtecBase::handle_t TAO_EC_Gateway_IIOP::consumer_info_

protected

Our RT_Infos for the event channel that is the consumer.

bool TAO_EC_Gateway_IIOP::consumer_is_active_

protected

If it is true then we must deactivate the consumer.

Consumer_Map TAO_EC_Gateway_IIOP::consumer_proxy_map_

protected

We talk to the EC (as a supplier) using either an per-supplier proxy or a generic proxy for the type only subscriptions. We push the events to these proxies

RtecEventChannelAdmin::ProxyPushConsumer_var TAO_EC_Gateway_IIOP::default_consumer_proxy_

protected

TAO_ECG_ConsumerEC_Control* TAO_EC_Gateway_IIOP::ec_control_

protected

The consumer ec control which controls the behaviour in case of a misbehaving consumer ec

TAO_EC_Gateway_IIOP_Factory* TAO_EC_Gateway_IIOP::factory_

protected

The Gateway IIOP Factory for all the settings.

TAO_SYNCH_MUTEX TAO_EC_Gateway_IIOP::lock_

protected

Lock to synchronize internal changes.

ACE_PushSupplier_Adapter<TAO_EC_Gateway_IIOP> TAO_EC_Gateway_IIOP::supplier_

protected

Our supplier personality....

RtecEventChannelAdmin::EventChannel_var TAO_EC_Gateway_IIOP::supplier_ec_

protected

The event channel acting as supplier for this gateway so we can reconnect when the list changes.

int TAO_EC_Gateway_IIOP::supplier_ec_suspended_

protected

Is the supplier ec suspended?

RtecBase::handle_t TAO_EC_Gateway_IIOP::supplier_info_

protected

Our RT_Infos for the event channel that is the supplier.

bool TAO_EC_Gateway_IIOP::supplier_is_active_

protected

If it is true then we must deactivate the supplier.

RtecEventChannelAdmin::ProxyPushSupplier_var TAO_EC_Gateway_IIOP::supplier_proxy_

protected

We talk to the EC (as a consumer) using this proxy. We receive the events from these proxy

int TAO_EC_Gateway_IIOP::update_posted_

protected

An update_consumer() message arrived while we were doing a push() the modification is stored, if multiple update_consumer messages arrive only the last one is executed.

int TAO_EC_Gateway_IIOP::use_consumer_proxy_map_

protected

The flag for using the consumer proxy map. With 1 the consumer proxy map is used, meaning that for each unique source id we use a different proxy push consumer, if 0, we only use one proxy push consumer (the default) for all source ids.

int TAO_EC_Gateway_IIOP::use_ttl_

protected

If 1, we use the TTL flags, if 0, we just ignore TTL.

The documentation for this class was generated from the following files:

Public Member Functions

Protected Types

Protected Member Functions

Protected Attributes

Private Member Functions

Detailed Description

Member Typedef Documentation

Constructor & Destructor Documentation

Member Function Documentation

Member Data Documentation