TAO_DLL_Parser Class Reference

Implment the parser for the DLL-style IORs. More...

#include <DLL_Parser.h>

Inheritance diagram for TAO_DLL_Parser:

Collaboration diagram for TAO_DLL_Parser:

List of all members.

Public Member Functions
virtual	~TAO_DLL_Parser (void)
	The destructor.
virtual bool	match_prefix (const char *ior_string) const
virtual CORBA::Object_ptr	parse_string (const char *ior, CORBA::ORB_ptr orb)
Public Member Functions inherited from TAO_IOR_Parser
virtual	~TAO_IOR_Parser (void)
	The destructor.
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	init (int argc, ACE_TCHAR *argv[])
virtual int	fini (void)
virtual int	info (ACE_TCHAR **info_string, size_t length=0) const

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Detailed Description

Implment the parser for the DLL-style IORs.

The DLL-style IORs allows applications to transparently load object implementations. The ORB can parse an IOR in the format:

DLL:Service_Name

the string_to_object() function will use ACE's Service Configurator framework to dynamically load the service named 'Service_Name' using all the normal platform-independent naming conventions and environment variable lookup rules that are normally used by ACE_DLL::open(). The ORB assumes that this service implements the TAO_Object_Loader interface, and uses that interface to create a new object implementation locally. The object reference for this local object is returned to the application.

This can be used in applications that sometimes require local object while other times they may use a remote implementation. For example, the application could be configured to use a remote Event Service or to dynamically load an Event Service implementation and use the local copy instead. The local Event Service would federate to its remote peers to work as-if a single Event Service was in place.

Such an application could be written as follows:

int main (int argc, char* argv) { CORBA::ORB_var orb = CORBA::ORB_init(argc, argv);

CORBA::Object_var object = orb->resolve_initial_references("EventService"); // Use <object> here... }

if the application is invoked using:

$ program -ORBInitRef EventService=IOR:....

then a remote event service is used, but the application could also be invoked using:

$ program -ORBInitRef EventService=DLL:Event_Service_Loader

In this case the Event_Service implementation will be dynamically loaded without any modifications to the application code.

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Constructor & Destructor Documentation

TAO_DLL_Parser::~TAO_DLL_Parser ( void  )

virtual

The destructor.

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Member Function Documentation

bool TAO_DLL_Parser::match_prefix ( const char *  ior_string ) const

virtual

Return true if ior_string starts with a prefix known to this IOR parser

Implements TAO_IOR_Parser.

CORBA::Object_ptr TAO_DLL_Parser::parse_string ( const char *  ior, CORBA::ORB_ptr  orb  )

virtual

Parse the ior argument and return an object reference. The call may raise the standard system exceptions (NO_MEMORY, INV_OBJREF, etc.)

Implements TAO_IOR_Parser.

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

• DLL_Parser.h
• DLL_Parser.cpp