#include <Connection_Handler.h>

Inheritance diagram for TAO_Connection_Handler:

Collaboration diagram for TAO_Connection_Handler:

Public Member Functions
	TAO_Connection_Handler (TAO_ORB_Core *orb_core)
	Constructor.
virtual	~TAO_Connection_Handler (void)
	Destructor.
TAO_Transport *	transport (void)
	Return the underlying transport object.
void	transport (TAO_Transport *transport)
	Set the underlying transport object.
bool	is_closed (void) const
	Is the handler closed or timed out?
bool	is_open (void) const
	Is the handler open?
bool	is_timeout (void) const
	Closed due to timeout?
bool	is_connecting (void) const
	Is the handler in the process of being connected?
virtual int	close_connection (void)=0
	Close the underlying connection.
virtual int	handle_input (ACE_HANDLE fd)=0
int	svc_i (void)
virtual int	open_handler (void *)=0
	A open () hook.
virtual int	close_handler (u_long flags=0)
void	connection_pending (void)
void	cancel_pending_connection (void)
virtual int	set_dscp_codepoint (CORBA::Boolean set_network_priority)
virtual int	set_dscp_codepoint (CORBA::Long dscp_codepoint)
virtual int	release_os_resources (void)
	Release the OS resources related to this handler.
virtual int	handle_write_ready (const ACE_Time_Value *timeout)
Protected Member Functions
TAO_ORB_Core *	orb_core (void)
	Return our TAO_ORB_Core pointer.
int	shared_open (void)
int	set_socket_option (ACE_SOCK &sock, int snd_size, int rcv_size)
	Set options on the socket.
Helper methods for Event_Handler-based derived classes.
Many (actually all so far) implementations of TAO_Connection_Handler are a mixin of TAO_Connection_Handler and some form of ACE_Event_Handler. The following methods simplify such implementations by capturing the common code in a single place.
int	handle_output_eh (ACE_HANDLE h, ACE_Event_Handler *eh)
	Implement the handle_output() callback.
int	handle_input_eh (ACE_HANDLE h, ACE_Event_Handler *eh)
	Implement the handle_input() callback.
int	handle_input_internal (ACE_HANDLE h, ACE_Event_Handler *eh)
	Implement the handle_output() callback.
int	close_connection_eh (ACE_Event_Handler *eh)
virtual void	pre_io_hook (int &return_value)
virtual void	pos_io_hook (int &return_value)
Private Attributes
TAO_ORB_Core *const	orb_core_
	Pointer to the TAO_ORB_Core.
TAO_Transport *	transport_
	Transport object reference.
bool	connection_pending_
	Stores the connection pending state.
bool	is_closed_

Detailed Description

TAO_Connection_Handler.

This class is an abstraction for the connection handlers. The connections handler in every protocol can derive from this class as well as the ACE_Svc_Handler specialised for the right protocol. This way, most of the common code for the different protocols would be in this implementation.

Constructor & Destructor Documentation

TAO_Connection_Handler::TAO_Connection_Handler ( TAO_ORB_Core * orb_core ) [explicit]

Constructor.

TAO_Connection_Handler::~TAO_Connection_Handler ( void ) [virtual]

Destructor.

Member Function Documentation

void TAO_Connection_Handler::cancel_pending_connection ( void )

A pending connection may be canceled due to an error detected while the initiating thread is still in the Connector.

virtual int TAO_Connection_Handler::close_connection ( void ) [pure virtual]

Close the underlying connection.

Used by the ORB to actively close connections that are idle, stale or somehow are determined to be broken before the Reactor does.

Returns:: Return 0 if the connection was already closed, non-zero otherwise.

Implemented in TAO_IIOP_Connection_Handler.

int TAO_Connection_Handler::close_connection_eh ( ACE_Event_Handler * eh ) [protected]

Implement close_connection() for Connection_Handlers that are also Event_Handlers.

int TAO_Connection_Handler::close_handler ( u_long flags = 0 ) [virtual]

A close() hook, called by the Transport Connector when they want to close this handler

void TAO_Connection_Handler::connection_pending ( void )

When waiting for an asynchronous connection to complete an additional reference must be maintained, related to bugzilla #2417. However once the connection is successfully established, this reference must be removed. Using connection_pending allows the connection handler to know that it is opening as a result of a delayed asynch connection rather than an immediate synch connection, which has no additional reference needs.

virtual int TAO_Connection_Handler::handle_input ( ACE_HANDLE fd ) [pure virtual]

The event handler calls, here so that other objects who hold a reference to this object can call the event handler methods.

Implemented in TAO_IIOP_Connection_Handler.

int TAO_Connection_Handler::handle_input_eh	(	ACE_HANDLE	h,
		ACE_Event_Handler *	eh
	)		`[protected]`

Implement the handle_input() callback.

int TAO_Connection_Handler::handle_input_internal	(	ACE_HANDLE	h,
		ACE_Event_Handler *	eh
	)		`[protected]`

Implement the handle_output() callback.

int TAO_Connection_Handler::handle_output_eh	(	ACE_HANDLE	h,
		ACE_Event_Handler *	eh
	)		`[protected]`

Implement the handle_output() callback.

int TAO_Connection_Handler::handle_write_ready ( const ACE_Time_Value * timeout ) [virtual]

Derived classes should implement this for proper support with the Blocking Flushing Strategy.

Reimplemented in TAO_IIOP_Connection_Handler.

bool TAO_Connection_Handler::is_closed ( void ) const

Is the handler closed or timed out?

bool TAO_Connection_Handler::is_connecting ( void ) const

Is the handler in the process of being connected?

bool TAO_Connection_Handler::is_open ( void ) const

Is the handler open?

bool TAO_Connection_Handler::is_timeout ( void ) const

Closed due to timeout?

virtual int TAO_Connection_Handler::open_handler ( void * ) [pure virtual]

A open () hook.

See Thread_Per_Connection_Handler for a use case

Implemented in TAO_IIOP_Connection_Handler.

TAO_ORB_Core * TAO_Connection_Handler::orb_core ( void ) [protected]

Return our TAO_ORB_Core pointer.

void TAO_Connection_Handler::pos_io_hook ( int & return_value ) [protected, virtual]

Post-invocation hook for I/O operations (handle_input() & handle_output()) See the SSLIOP protocol for an interesting use-case

void TAO_Connection_Handler::pre_io_hook ( int & return_value ) [protected, virtual]

Pre-invocation hook for I/O operations (handle_input() & handle_output()) See the SSLIOP protocol for an interesting use-case

int TAO_Connection_Handler::release_os_resources ( void ) [virtual]

Release the OS resources related to this handler.

Reimplemented in TAO_IIOP_Connection_Handler.

int TAO_Connection_Handler::set_dscp_codepoint ( CORBA::Boolean set_network_priority ) [virtual]

Set the Diff-Serv codepoint on outgoing packets. Only has effect for remote protocols (e.g., IIOP); no effect for local protocols (UIOP). Default implementation is for local protocols. Remote protocols must overwrite implementation.

Reimplemented in TAO_IIOP_Connection_Handler.

int TAO_Connection_Handler::set_dscp_codepoint ( CORBA::Long dscp_codepoint ) [virtual]

Reimplemented in TAO_IIOP_Connection_Handler.