Implement the builder for setting up Event Channel multicast gateway. NOT THREAD-SAFE. More...

#include <ECG_Mcast_Gateway.h>

Inheritance diagram for TAO_ECG_Mcast_Gateway:

Collaboration diagram for TAO_ECG_Mcast_Gateway:

Classes
struct	Attributes
	Helper class to initialize a TAO_ECG_Mcast_Gateway. More...

Public Types

enum	Service_Type { ECG_MCAST_SENDER, ECG_MCAST_RECEIVER, ECG_MCAST_TWO_WAY }
	Values for some configuration parameters to init (). More...

enum	Address_Server_Type { ECG_ADDRESS_SERVER_BASIC, ECG_ADDRESS_SERVER_SOURCE, ECG_ADDRESS_SERVER_TYPE }
	Values for some configuration parameters to init (). More...

enum	Handler_Type { ECG_HANDLER_BASIC, ECG_HANDLER_COMPLEX, ECG_HANDLER_UDP }
	Values for some configuration parameters to init (). More...

Public Types inherited from ACE_Service_Object
typedef long	Reference_Count

Public Types inherited from ACE_Event_Handler
typedef long	Reference_Count

Public Member Functions
	TAO_ECG_Mcast_Gateway (void)
	Constructor.

int	init (const char *address_server_arg, const Attributes &attributes=Attributes())

int	init (const RtecEventChannelAdmin::ConsumerQOS &consumer_qos, const char *address_server_arg, const Attributes &attributes=Attributes())

void	run (CORBA::ORB_ptr orb, RtecEventChannelAdmin::EventChannel_ptr ec)


virtual int	init (int argc, ACE_TCHAR *argv[])
	The Service_Object entry points.

virtual int	fini (void)
	The Service_Object entry points.

Public Member Functions inherited from ACE_Service_Object
	ACE_Service_Object (ACE_Reactor *=0)

virtual	~ACE_Service_Object (void)

virtual int	suspend (void)

virtual int	resume (void)

virtual	~ACE_Event_Handler (void)

virtual ACE_HANDLE	get_handle (void) const

virtual void	set_handle (ACE_HANDLE)

virtual int	priority (void) const

virtual void	priority (int priority)

virtual int	handle_input (ACE_HANDLE fd=ACE_INVALID_HANDLE)

virtual int	handle_output (ACE_HANDLE fd=ACE_INVALID_HANDLE)

virtual int	handle_exception (ACE_HANDLE fd=ACE_INVALID_HANDLE)

virtual int	handle_timeout (const ACE_Time_Value &current_time, const void *act=0)

virtual int	handle_exit (ACE_Process *)

virtual int	handle_close (ACE_HANDLE handle, ACE_Reactor_Mask close_mask)

virtual int	handle_signal (int signum, siginfo_t =0, ucontext_t =0)

virtual int	resume_handler (void)

virtual int	handle_qos (ACE_HANDLE=ACE_INVALID_HANDLE)

virtual int	handle_group_qos (ACE_HANDLE=ACE_INVALID_HANDLE)

virtual void	reactor (ACE_Reactor *reactor)

virtual ACE_Reactor *	reactor (void) const

virtual ACE_Reactor_Timer_Interface *	reactor_timer_interface (void) const

virtual Reference_Count	add_reference (void)

virtual Reference_Count	remove_reference (void)

Reference_Counting_Policy &	reference_counting_policy (void)

	ACE_Shared_Object (void)

virtual	~ACE_Shared_Object (void)

virtual int	info (ACE_TCHAR **info_string, size_t length=0) const

Public Member Functions inherited from ACE_Event_Handler
Reference_Counting_Policy &	reference_counting_policy (void)

Public Member Functions inherited from ACE_Shared_Object
	ACE_Shared_Object (void)

Static Public Member Functions
static int	init_svcs (void)

Static Public Member Functions inherited from ACE_Service_Object
static ACE_THR_FUNC_RETURN	read_adapter (void *event_handler)

static int	register_stdin_handler (ACE_Event_Handler eh, ACE_Reactor reactor, ACE_Thread_Manager *thr_mgr, int flags=THR_DETACHED)

static int	remove_stdin_handler (ACE_Reactor reactor, ACE_Thread_Manager thr_mgr)

Static Public Member Functions inherited from ACE_Event_Handler
static ACE_THR_FUNC_RETURN	read_adapter (void *event_handler)

static int	register_stdin_handler (ACE_Event_Handler eh, ACE_Reactor reactor, ACE_Thread_Manager *thr_mgr, int flags=THR_DETACHED)

static int	remove_stdin_handler (ACE_Reactor reactor, ACE_Thread_Manager thr_mgr)

Private Member Functions

void	verify_args (CORBA::ORB_ptr orb, RtecEventChannelAdmin::EventChannel_ptr ec)
	Helpers.

int	validate_configuration (void)
	Verifies configuration values specified through init() make sense.


PortableServer::ServantBase *	init_address_server (void)
	Allocate and initialize appropriate objects.

PortableServer::Servant_var < TAO_ECG_UDP_Sender >	init_sender (RtecEventChannelAdmin::EventChannel_ptr ec, RtecUDPAdmin::AddrServer_ptr address_server, TAO_ECG_Refcounted_Endpoint endpoint_rptr)
	Allocate and initialize appropriate objects.

PortableServer::Servant_var < TAO_ECG_UDP_Receiver >	init_receiver (RtecEventChannelAdmin::EventChannel_ptr ec, RtecUDPAdmin::AddrServer_ptr address_server, TAO_ECG_Refcounted_Endpoint endpoint_rptr)
	Allocate and initialize appropriate objects.

TAO_ECG_Refcounted_Endpoint	init_endpoint (void)
	Allocate and initialize appropriate objects.

TAO_ECG_Refcounted_Handler	init_handler (TAO_ECG_Dgram_Handler recv, RtecEventChannelAdmin::EventChannel_ptr ec, ACE_Reactor reactor)
	Allocate and initialize appropriate objects.

Private Attributes

Service_Type	service_type_
	Flags controlling configuration.

Handler_Type	handler_type_
	Flags controlling configuration.

Address_Server_Type	address_server_type_
	Flags controlling configuration.

ACE_CString	address_server_arg_
	Flags controlling configuration.

u_char	ttl_value_
	Flags controlling configuration.

ACE_TString	nic_
	Flags controlling configuration.

int	ip_multicast_loop_
	Flags controlling configuration.

int	non_blocking_
	Flags controlling configuration.

RtecEventChannelAdmin::ConsumerQOS	consumer_qos_
	Flags controlling configuration.

Additional Inherited Members
Public Attributes inherited from ACE_Service_Object
	LO_PRIORITY

	HI_PRIORITY

	NULL_MASK

	READ_MASK

	WRITE_MASK

	EXCEPT_MASK

	ACCEPT_MASK

	CONNECT_MASK

	TIMER_MASK

	QOS_MASK

	GROUP_QOS_MASK

	SIGNAL_MASK

	ALL_EVENTS_MASK

	RWE_MASK

	DONT_CALL

	ACE_EVENT_HANDLER_NOT_RESUMED

	ACE_REACTOR_RESUMES_HANDLER

	ACE_APPLICATION_RESUMES_HANDLER

Protected Types inherited from ACE_Service_Object
typedef ACE_Atomic_Op < ACE_SYNCH_MUTEX, Reference_Count >	Atomic_Reference_Count

Protected Member Functions inherited from ACE_Service_Object
	ACE_Event_Handler (ACE_Reactor *=0, int priority=ACE_Event_Handler::LO_PRIORITY)

Protected Attributes inherited from ACE_Service_Object
Atomic_Reference_Count	reference_count_

Detailed Description

Implement the builder for setting up Event Channel multicast gateway. NOT THREAD-SAFE.

This class simplifies creation of federated Event Channels by presenting a simple unified interface for creating and configuring all components needed to federate an Event Channel. Configuration options are described below.

NOTE: This class does not own any of the components it creates and its lifetime is independent of theirs. This class acts purely as a wrapper facade for creating and wiring appropriate components together.

Todo:: This class is an ACE_Service_Object, but the only reason for it is the need for easy configuration using files. Since ACE_Service_Object provides much more than that, we should look into replacing it with a more lightweight utility that would serve our needs.

CONFIGURATION OPTIONS There are two ways to use this class: 1) Use service config file to specify configuration options (which are described below), and use service configurator to obtain a an instance of configured TAO_ECG_Mcast_Gateway in your program. (See TAO/orbsvcs/tests/Event/Mcast/Common and TAO/orbsvcs/tests/Event/Mcast/Simple for an example.)

Service config file options:

-ECGService <service> Valid values: sender, receiver, two_way Specifies whether this gateway should act as a multicast sender of the events or multicast receiver, or both.

-ECGAddressServer <server_type> Valid values: basic, source, type Specifies what implementation of the address server should be used by the gateway. basic - the same multicast address is returned for all event headers. source - multicast addresses are returned based on the event source, according to the mapping provided at initialization. type - multicast addresses are returned based on the event type, according to the mapping provided at initialization.

-ECGAddressServerArg <arg> Valid value: arg is a string, whose format requirements are specific to the implementation of address server used. Arg is not interpreted by the gateway, but simply passed to the address server specified by -ECGAddressServer during initialization. THIS OPTION MUST ALWAYS BE SPECIFIED BY THE USER (there is no default value for it)

-ECGHandler <handler_type> Valid values: basic, complex, udp Specifies what implementation of event handler should be used if gateway is acting as events receiver. basic - a simple event handler listening on a single mcast address. complex - event handler listening on multiple mcast addresses based on events of interest to consumers. udp - similar to basic handler, except listens on udp address as opposed to a multicast group.

-ECGTTL <ttl> Valid values: a number > 0 IP_Multicast time to live value that should be set on a sending socket. This option matters only if the gateway is acting as a sender of mcast messages.

-ECGNIC <nic> Valid values: name of the network interface This interface is used for sending and/or receiving multicast messages.

-ECGNonBlocking Boolean flag to configure if the socket is in blocking or non-blocking code. The default is non-blocking. NOTE: Certain device drivers block the process if the physical link fails.

2) Create an instance of TAO_ECG_Mcast_Gateway in your code, on the stack or dynamically, and use init () method to configure it. No configuration files involved. See service config options above for the description of configurable options, and init() method below for how to specify them.

Default configuration values (for either use case) can be found in ECG_Defaults.h

Member Enumeration Documentation

enum TAO_ECG_Mcast_Gateway::Address_Server_Type

Values for some configuration parameters to init ().

Enumerator:

ECG_ADDRESS_SERVER_BASIC
ECG_ADDRESS_SERVER_SOURCE
ECG_ADDRESS_SERVER_TYPE

enum TAO_ECG_Mcast_Gateway::Handler_Type

Values for some configuration parameters to init ().

Enumerator:

ECG_HANDLER_BASIC
ECG_HANDLER_COMPLEX
ECG_HANDLER_UDP

enum TAO_ECG_Mcast_Gateway::Service_Type

Values for some configuration parameters to init ().

Enumerator:

ECG_MCAST_SENDER
ECG_MCAST_RECEIVER
ECG_MCAST_TWO_WAY

Constructor & Destructor Documentation

TAO_ECG_Mcast_Gateway::TAO_ECG_Mcast_Gateway ( void )

Constructor.

Member Function Documentation

int TAO_ECG_Mcast_Gateway::fini ( void )

virtual

The Service_Object entry points.

Reimplemented from ACE_Service_Object.

int TAO_ECG_Mcast_Gateway::init	(	int	argc,
		ACE_TCHAR *	argv[]
	)

virtual

The Service_Object entry points.

Reimplemented from ACE_Service_Object.

int TAO_ECG_Mcast_Gateway::init	(	const char *	address_server_arg,
		const Attributes &	attributes = `Attributes()`
	)

Configure TAO_ECG_Mcast_Gateway programatically. This method should be used when NOT using service configurator to obtain/configure TAO_ECG_Mcast_Gateway. See class documentation above for more info.

int TAO_ECG_Mcast_Gateway::init	(	const RtecEventChannelAdmin::ConsumerQOS &	consumer_qos,
		const char *	address_server_arg,
		const Attributes &	attributes = `Attributes()`
	)

Same as the method above, but also gives the client an opportunity to specify consumer qos, i.e., which EC traffic should get multicasted.

PortableServer::ServantBase * TAO_ECG_Mcast_Gateway::init_address_server ( void )

private

Allocate and initialize appropriate objects.

TAO_ECG_Refcounted_Endpoint TAO_ECG_Mcast_Gateway::init_endpoint ( void )

private

Allocate and initialize appropriate objects.

TAO_ECG_Refcounted_Handler TAO_ECG_Mcast_Gateway::init_handler	(	TAO_ECG_Dgram_Handler *	recv,
		RtecEventChannelAdmin::EventChannel_ptr	ec,
		ACE_Reactor *	reactor
	)

private

Allocate and initialize appropriate objects.

PortableServer::Servant_var< TAO_ECG_UDP_Receiver > TAO_ECG_Mcast_Gateway::init_receiver	(	RtecEventChannelAdmin::EventChannel_ptr	ec,
		RtecUDPAdmin::AddrServer_ptr	address_server,
		TAO_ECG_Refcounted_Endpoint	endpoint_rptr
	)

private

Allocate and initialize appropriate objects.

PortableServer::Servant_var< TAO_ECG_UDP_Sender > TAO_ECG_Mcast_Gateway::init_sender	(	RtecEventChannelAdmin::EventChannel_ptr	ec,
		RtecUDPAdmin::AddrServer_ptr	address_server,
		TAO_ECG_Refcounted_Endpoint	endpoint_rptr
	)

private

Allocate and initialize appropriate objects.

int TAO_ECG_Mcast_Gateway::init_svcs ( void )

static

Helper function to register the Gateway into the service configurator.

void TAO_ECG_Mcast_Gateway::run	(	CORBA::ORB_ptr	orb,
		RtecEventChannelAdmin::EventChannel_ptr	ec
	)

The main method - create, configure and run federation components according to the specified configuration.

int TAO_ECG_Mcast_Gateway::validate_configuration ( void )

private

Verifies configuration values specified through init() make sense.

void TAO_ECG_Mcast_Gateway::verify_args	(	CORBA::ORB_ptr	orb,
		RtecEventChannelAdmin::EventChannel_ptr	ec
	)

private

Helpers.

Check that arguments to run() are not nil.