TAO  2.1.4
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TAO_DLL_Parser Class Reference

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

#include <DLL_Parser.h>

Inheritance diagram for TAO_DLL_Parser:
Inheritance graph
Collaboration diagram for TAO_DLL_Parser:
Collaboration graph

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_Reactorreactor (void) const
reactor_timer_interface (void) const
virtual Reference_Count add_reference (void)
virtual Reference_Count remove_reference (void)
Reference_Counting_Policyreference_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
- Public Member Functions inherited from ACE_Event_Handler
Reference_Counting_Policyreference_counting_policy (void)
- Public Member Functions inherited from ACE_Shared_Object
 ACE_Shared_Object (void)

Additional Inherited Members

- Public Types inherited from ACE_Service_Object
typedef long Reference_Count
- 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)
- Public Attributes inherited from ACE_Service_Object
- Protected Types inherited from ACE_Service_Object
typedef ACE_Atomic_Op
- 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

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:


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.

Constructor & Destructor Documentation

TAO_DLL_Parser::~TAO_DLL_Parser ( void  )

The destructor.

Member Function Documentation

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

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 

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.

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