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TAO_AV_Child_Process< T_StreamEndpoint, T_VDev, T_MediaCtrl > Class Template Reference

Helper class for the child process created in TAO_AV_Endpoint_Process_Strategy. More...

#include <Endpoint_Strategy_T.h>

Inheritance diagram for TAO_AV_Child_Process< T_StreamEndpoint, T_VDev, T_MediaCtrl >:

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Collaboration diagram for TAO_AV_Child_Process< T_StreamEndpoint, T_VDev, T_MediaCtrl >:

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List of all members.

Public Member Functions

 TAO_AV_Child_Process ()
 Constructor.

virtual ~TAO_AV_Child_Process ()
 Destructor.

int init (int argc, char **argv, CORBA::ORB_ptr orb, PortableServer::POA_ptr poa)
int run (ACE_Time_Value *tv=0)
 runs the ORB event loop


Protected Member Functions

int activate_objects (int argc, char **argv)
char * activate_with_poa (PortableServer::Servant servant)
 activate the servant with the poa

int unbind_names (void)
 Removes the vdev and streamendpoint names from the naming service.

int bind_to_naming_service (void)
 Binds to the naming service.

int register_vdev (void)
 Registers vdev with the naming service.

int register_stream_endpoint (void)
 Registers stream_endpoint with the naming service.

int release_semaphore ()
 Releases the semaphore on which the parent is waiting on.

virtual int make_vdev (T_VDev *&vdev)
virtual int make_stream_endpoint (T_StreamEndpoint *&stream_endpoint)
virtual int make_mediactrl (T_MediaCtrl *&media_ctrl)

Protected Attributes

CosNaming::NamingContext_var naming_context_
 The root Naming Context of the TAO naming service.

CosNaming::Name vdev_name_
 Name of the vdev.

CosNaming::Name stream_endpoint_name_
 Name of the stream_endpoint.

T_StreamEndpoint * stream_endpoint_
 The stream endpoint member.

T_VDev * vdev_
 The virtual device.

CORBA::Object_var vdev_obj_
 Virtual device CORBA object reference.

T_MediaCtrl * media_ctrl_
 Media controller.

CORBA::Object_var media_ctrl_obj_
pid_t pid_
 pid of this process

char host_ [MAXHOSTNAMELEN]
 Name of the host.

CORBA::ORB_ptr orb_
PortableServer::POA_ptr poa_

Detailed Description

template<class T_StreamEndpoint, class T_VDev, class T_MediaCtrl>
class TAO_AV_Child_Process< T_StreamEndpoint, T_VDev, T_MediaCtrl >

Helper class for the child process created in TAO_AV_Endpoint_Process_Strategy.

Definition at line 150 of file Endpoint_Strategy_T.h.

Constructor & Destructor Documentation

template<class T_StreamEndpoint_B, class T_VDev, class T_MediaCtrl>
TAO_AV_Child_Process< T_StreamEndpoint_B, T_VDev, T_MediaCtrl >::TAO_AV_Child_Process (   ) 
 

Constructor.

Definition at line 341 of file Endpoint_Strategy_T.cpp.

References ACE_ERROR, ACE_OS::getpid(), ACE_OS::hostname(), and LM_ERROR. 

00342   : stream_endpoint_name_ (0),
00343     pid_ (-1)
00344 {
00345   this->pid_ = ACE_OS::getpid ();
00346   if (this->pid_ == 0)
00347     ACE_ERROR ((LM_ERROR,"getpid () failed\n"));
00348   ACE_OS::hostname (this->host_,
00349                     sizeof this->host_);
00350 }

template<class T_StreamEndpoint, class T_VDev, class T_MediaCtrl>
TAO_AV_Child_Process< T_StreamEndpoint, T_VDev, T_MediaCtrl >::~TAO_AV_Child_Process (   )  [virtual]
 

Destructor.

Definition at line 684 of file Endpoint_Strategy_T.cpp.

References TAO_AV_Child_Process< T_StreamEndpoint, T_VDev, T_MediaCtrl >::unbind_names(). 

00685 {
00686   this->unbind_names ();
00687 }

Member Function Documentation

template<class T_StreamEndpoint, class T_VDev, class T_MediaCtrl>
int TAO_AV_Child_Process< T_StreamEndpoint, T_VDev, T_MediaCtrl >::activate_objects (  int  argc,
char **  argv
)  [protected]
 

Creates the objects and inserts them into the Naming Service, so the parent can pick the IOR's and return them to the client

Definition at line 414 of file Endpoint_Strategy_T.cpp.

References ACE_DEBUG, LM_DEBUG, and TAO_debug_level. 

00416 {
00417   try
00418     {
00419       // bridge method to make a new stream endpoint
00420       if (this->make_stream_endpoint (this->stream_endpoint_) == -1)
00421         return -1;
00422 
00423       // bridge method to make a new vdev
00424       if (this->make_vdev (this->vdev_) == -1)
00425         return -1;
00426 
00427       // bridge method to make a new media controller
00428       if (this->make_mediactrl (this->media_ctrl_) == -1)
00429         return -1;
00430 
00431       // activate the stream_endpoint
00432       CORBA::String_var stream_endpoint_ior = this->activate_with_poa (this->stream_endpoint_);
00433       if (TAO_debug_level > 0) ACE_DEBUG ((LM_DEBUG,
00434                                            "(%P|%t)TAO_AV_Child_Process::activate_objects,stream_endpoint_ior :%s\n",
00435                                            stream_endpoint_ior.in ()));
00436 
00437       // activate the vdev
00438       CORBA::String_var vdev_ior = this->activate_with_poa (this->vdev_);
00439       if (TAO_debug_level > 0) ACE_DEBUG ((LM_DEBUG,
00440                                            "(%P|%t)TAO_AV_Child_Process::activate_objects, vdev ior is :%s\n",
00441                                            vdev_ior.in ()));
00442 
00443       // activate the media controller
00444       CORBA::String_var media_ctrl_ior = this->activate_with_poa (this->media_ctrl_);
00445 
00446       if (TAO_debug_level > 0) ACE_DEBUG ((LM_DEBUG,"(%P|%t)TAO_AV_Child_Process::activate_objects,media_ctrl_ior is: %s\n",media_ctrl_ior.in ()));
00447     }
00448   catch (const CORBA::Exception& ex)
00449     {
00450       ex._tao_print_exception ("TAO_AV_Child_Process::init ");
00451       return -1;
00452     }
00453   return 0;
00454 }

template<class T_StreamEndpoint, class T_VDev, class T_MediaCtrl>
char * TAO_AV_Child_Process< T_StreamEndpoint, T_VDev, T_MediaCtrl >::activate_with_poa (  PortableServer::Servant  servant  )  [protected]
 

activate the servant with the poa

Definition at line 396 of file Endpoint_Strategy_T.cpp. 

00397 {
00398 
00399   PortableServer::ObjectId_var id =
00400     this->poa_->activate_object (servant);
00401 
00402   CORBA::Object_var obj =
00403     this->poa_->id_to_reference (id.in ());
00404 
00405   CORBA::String_var str =
00406     this->orb_->object_to_string (obj.in ());
00407 
00408   return str._retn ();
00409 }

template<class T_StreamEndpoint, class T_VDev, class T_MediaCtrl>
int TAO_AV_Child_Process< T_StreamEndpoint, T_VDev, T_MediaCtrl >::bind_to_naming_service (  void   )  [protected]
 

Binds to the naming service.

Definition at line 459 of file Endpoint_Strategy_T.cpp.

References ACE_ERROR_RETURN, CORBA::is_nil(), and LM_ERROR. 

00460 {
00461   try
00462     {
00463       CORBA::Object_var naming_obj =
00464         this->orb_->resolve_initial_references ("NameService");
00465       if (CORBA::is_nil (naming_obj.in ()))
00466         ACE_ERROR_RETURN ((LM_ERROR,
00467                            " (%P|%t) Unable to resolve the Name Service.\n"),
00468                           -1);
00469       //  if (TAO_debug_level > 0) ACE_DEBUG ((LM_DEBUG, "(%P|%t) %s:%d\n", __FILE__, __LINE__));
00470       this->naming_context_ =
00471         CosNaming::NamingContext::_narrow (naming_obj.in ());
00472     }
00473   catch (const CORBA::Exception& ex)
00474     {
00475       ex._tao_print_exception (
00476         "TAO_AV_Child_Process::bind_to_naming_service");
00477       return -1;
00478     }
00479   return 0;
00480 }

template<class T_StreamEndpoint_B, class T_VDev, class T_MediaCtrl>
int TAO_AV_Child_Process< T_StreamEndpoint_B, T_VDev, T_MediaCtrl >::init (  int  argc,
char **  argv,
CORBA::ORB_ptr  orb,
PortableServer::POA_ptr  poa
) 
 

Initializes the ORB, creates and activates the T_StreamEndpoint, T_VDev, T_MediaCtrl in the POA

Definition at line 355 of file Endpoint_Strategy_T.cpp.

References ACE_ERROR_RETURN, and LM_ERROR. 

00359 {
00360   try
00361     {
00362       this->orb_ = orb;
00363 
00364       this->poa_ = poa;
00365 
00366       // create the objects and activate them in the poa
00367       this->activate_objects (argc,
00368                               argv);
00369 
00370       // Get ourselves a naming_service object reference
00371       this->bind_to_naming_service ();
00372 
00373       // Register the vdev with the naming service
00374       this->register_vdev ();
00375 
00376       // register the stream_endpoing with the naming_service
00377       this->register_stream_endpoint ();
00378     }
00379   catch (const CORBA::Exception& ex)
00380     {
00381       ex._tao_print_exception ("TAO_Child_Process");
00382       return -1;
00383     }
00384 
00385   // release the semaphore the parent is waiting on
00386   if (this->release_semaphore () == -1)
00387     ACE_ERROR_RETURN ((LM_ERROR,
00388                        "(%P|%t) Error releasing semaphores\n"),
00389                       -1);
00390 
00391   return 0;
00392 }

template<class T_StreamEndpoint, class T_VDev, class T_MediaCtrl>
int TAO_AV_Child_Process< T_StreamEndpoint, T_VDev, T_MediaCtrl >::make_mediactrl (  T_MediaCtrl *&  media_ctrl  )  [protected, virtual]
 

Bridge method to create a media_ctrl, a la Acceptor. Applications can override this

Definition at line 646 of file Endpoint_Strategy_T.cpp.

References ACE_DEBUG, ACE_NEW_RETURN, LM_DEBUG, and TAO_debug_level. 

00647 {
00648   if (TAO_debug_level > 0) ACE_DEBUG ((LM_DEBUG,"(%P|%t) TAO_AV_Child_Process::make_mediactrl ()\n"));
00649   ACE_NEW_RETURN (media_ctrl,
00650                   T_MediaCtrl,
00651                   -1);
00652   return 0;
00653 }

template<class T_StreamEndpoint, class T_VDev, class T_MediaCtrl>
int TAO_AV_Child_Process< T_StreamEndpoint, T_VDev, T_MediaCtrl >::make_stream_endpoint (  T_StreamEndpoint *&  stream_endpoint  )  [protected, virtual]
 

Bridge method to create a stream_endpoint, a la Acceptor. Applications can override this

Definition at line 624 of file Endpoint_Strategy_T.cpp.

References ACE_NEW_RETURN. 

00625 {
00626   ACE_NEW_RETURN (stream_endpoint,
00627                   T_StreamEndpoint,
00628                   -1);
00629   return 0;
00630 }

template<class T_StreamEndpoint, class T_VDev, class T_MediaCtrl>
int TAO_AV_Child_Process< T_StreamEndpoint, T_VDev, T_MediaCtrl >::make_vdev (  T_VDev *&  vdev  )  [protected, virtual]
 

Bridge method to create a vdev, a la Acceptor. Applications can override this

Definition at line 635 of file Endpoint_Strategy_T.cpp.

References ACE_NEW_RETURN. 

00636 {
00637   ACE_NEW_RETURN (vdev,
00638                   T_VDev,
00639                   -1);
00640   return 0;
00641 }

template<class T_StreamEndpoint, class T_VDev, class T_MediaCtrl>
int TAO_AV_Child_Process< T_StreamEndpoint, T_VDev, T_MediaCtrl >::register_stream_endpoint (  void   )  [protected]
 

Registers stream_endpoint with the naming service.

Definition at line 593 of file Endpoint_Strategy_T.cpp.

References CORBA::Object::_nil(). 

00594 {
00595   CORBA::Object_ptr stream_endpoint_obj = CORBA::Object::_nil ();
00596   try
00597     {
00598       stream_endpoint_obj = this->stream_endpoint_->_this ();
00599 
00600       // Create a name for the video control object
00601       // subclasses can define their own name for the streamendpoint
00602       // Register the stream endpoint object with the naming server.
00603       this->naming_context_->bind (this->stream_endpoint_name_,
00604                                    stream_endpoint_obj);
00605     }
00606   catch (const CosNaming::NamingContext::AlreadyBound& )
00607     {
00608       // if the name was already there, replace the reference with the new one
00609       this->naming_context_->rebind (this->stream_endpoint_name_,
00610                                      stream_endpoint_obj);
00611     }
00612   catch (const CORBA::Exception& ex)
00613     {
00614       ex._tao_print_exception (
00615         "TAO_Endpoint_Reactive_Strategy::activate");
00616       return -1;
00617     }
00618   return 0;
00619 }

template<class T_StreamEndpoint, class T_VDev, class T_MediaCtrl>
int TAO_AV_Child_Process< T_StreamEndpoint, T_VDev, T_MediaCtrl >::register_vdev (  void   )  [protected]
 

Registers vdev with the naming service.

Definition at line 485 of file Endpoint_Strategy_T.cpp.

References ACE_DEBUG, LM_DEBUG, ACE_OS::sprintf(), CORBA::string_dup(), and TAO_debug_level. 

00486 {
00487   try
00488     {
00489       char vdev_name [BUFSIZ];
00490       ACE_OS::sprintf (vdev_name,
00491                        "%s:%s:%ld",
00492                        "VDev",
00493                        this->host_,
00494                        static_cast<long> (this->pid_));
00495 
00496       if (TAO_debug_level > 0) ACE_DEBUG ((LM_DEBUG,"(%P|%t)%s\n",vdev_name));
00497       // create the name
00498       this->vdev_name_.length (1);
00499       this->vdev_name_ [0].id = CORBA::string_dup (vdev_name);
00500 
00501       // make the media controller a property of the vdev
00502       CORBA::Any media_ctrl_property;
00503       media_ctrl_obj_ =
00504         this->media_ctrl_->_this ();
00505 
00506       this->vdev_->define_property ("Related_MediaCtrl",
00507                                     media_ctrl_obj_.in());
00508 
00509       vdev_obj_ = this->vdev_->_this ();
00510 
00511       try
00512         {
00513           // Register the vdev with the naming server.
00514           this->naming_context_->bind (this->vdev_name_,
00515                                        vdev_obj_.in());
00516         }
00517       catch (const CosNaming::NamingContext::AlreadyBound& )
00518         {
00519           // If the object was already there, replace the older reference
00520           // with this one
00521           this->naming_context_->rebind (this->vdev_name_,
00522                                          vdev_obj_.in());
00523         }
00524       catch (const CORBA::Exception& ex)
00525         {
00526           ex._tao_print_exception (
00527             "TAO_AV_Child_Process::register_vdev");
00528           return -1;
00529         }
00530     }
00531   catch (const CORBA::Exception& ex)
00532     {
00533       ex._tao_print_exception (
00534         "TAO_AV_Child_Process::register_vdev");
00535       return -1;
00536     }
00537   return 0;
00538 }

template<class T_StreamEndpoint_B, class T_VDev, class T_MediaCtrl>
int TAO_AV_Child_Process< T_StreamEndpoint_B, T_VDev, T_MediaCtrl >::release_semaphore (   )  [protected]
 

Releases the semaphore on which the parent is waiting on.

Definition at line 560 of file Endpoint_Strategy_T.cpp.

References ACE_DEBUG, ACE_ERROR_RETURN, LM_DEBUG, LM_ERROR, ACE_Process_Semaphore::release(), ACE_OS::sprintf(), and TAO_debug_level. 

00561 {
00562   char sem_str [BUFSIZ];
00563 
00564   long pid = this->pid_;
00565   ACE_OS::sprintf (sem_str,
00566                    "%s:%s:%ld",
00567                    "TAO_AV_Process_Semaphore",
00568                    this->host_,
00569                    pid);
00570 
00571   if (TAO_debug_level > 0) ACE_DEBUG ((LM_DEBUG,
00572               "(%P|%t) semaphore is %s\n",
00573               sem_str));
00574 
00575   // Release the lock on which the server is waiting
00576   ACE_Process_Semaphore semaphore (0, // 0 means that the semaphore is
00577                                    // initially locked
00578                                    sem_str);
00579 
00580   if (semaphore.release () == -1)
00581     ACE_ERROR_RETURN ((LM_ERROR,
00582                        "(%P|%t) Error releasing semaphore %s: %p\n",
00583                        sem_str,
00584                        "semaphore.release ()"),
00585                       -1);
00586 
00587   return 0;
00588 }

template<class T_StreamEndpoint_B, class T_VDev, class T_MediaCtrl>
int TAO_AV_Child_Process< T_StreamEndpoint_B, T_VDev, T_MediaCtrl >::run (  ACE_Time_Value *  tv = 0  ) 
 

runs the ORB event loop

Definition at line 543 of file Endpoint_Strategy_T.cpp. 

00544 {
00545   try
00546     {
00547       this->orb_->run (tv);
00548     }
00549   catch (const CORBA::Exception& ex)
00550     {
00551       ex._tao_print_exception ("orb.run ()");
00552       return -1;
00553     }
00554   return 0;
00555 }

template<class T_StreamEndpoint, class T_VDev, class T_MediaCtrl>
int TAO_AV_Child_Process< T_StreamEndpoint, T_VDev, T_MediaCtrl >::unbind_names (  void   )  [protected]
 

Removes the vdev and streamendpoint names from the naming service.

Definition at line 658 of file Endpoint_Strategy_T.cpp.

References CORBA::is_nil().

Referenced by TAO_AV_Child_Process< T_StreamEndpoint, T_VDev, T_MediaCtrl >::~TAO_AV_Child_Process(). 

00659 {
00660   // Remove the names from the naming service
00661   try
00662     {
00663       if (CORBA::is_nil (this->naming_context_.in ()) == 0)
00664         return 0;
00665       this->naming_context_->unbind (this->stream_endpoint_name_);
00666 
00667       this->naming_context_->unbind (this->vdev_name_);
00668     }
00669   catch (const CORBA::Exception& ex)
00670     {
00671       ex._tao_print_exception (
00672         "TAO_Endpoint_Process_Strategy::activate");
00673       return -1;
00674     }
00675   return 0;
00676 }

Member Data Documentation

template<class T_StreamEndpoint, class T_VDev, class T_MediaCtrl>
char TAO_AV_Child_Process< T_StreamEndpoint, T_VDev, T_MediaCtrl >::host_[MAXHOSTNAMELEN] [protected]
 

Name of the host.

Definition at line 234 of file Endpoint_Strategy_T.h.

template<class T_StreamEndpoint, class T_VDev, class T_MediaCtrl>
T_MediaCtrl* TAO_AV_Child_Process< T_StreamEndpoint, T_VDev, T_MediaCtrl >::media_ctrl_ [protected]
 

Media controller.

Definition at line 225 of file Endpoint_Strategy_T.h.

template<class T_StreamEndpoint, class T_VDev, class T_MediaCtrl>
CORBA::Object_var TAO_AV_Child_Process< T_StreamEndpoint, T_VDev, T_MediaCtrl >::media_ctrl_obj_ [protected]
 

Definition at line 228 of file Endpoint_Strategy_T.h.

template<class T_StreamEndpoint, class T_VDev, class T_MediaCtrl>
CosNaming::NamingContext_var TAO_AV_Child_Process< T_StreamEndpoint, T_VDev, T_MediaCtrl >::naming_context_ [protected]
 

The root Naming Context of the TAO naming service.

Definition at line 207 of file Endpoint_Strategy_T.h.

template<class T_StreamEndpoint, class T_VDev, class T_MediaCtrl>
CORBA::ORB_ptr TAO_AV_Child_Process< T_StreamEndpoint, T_VDev, T_MediaCtrl >::orb_ [protected]
 

Definition at line 236 of file Endpoint_Strategy_T.h.

template<class T_StreamEndpoint, class T_VDev, class T_MediaCtrl>
pid_t TAO_AV_Child_Process< T_StreamEndpoint, T_VDev, T_MediaCtrl >::pid_ [protected]
 

pid of this process

Definition at line 231 of file Endpoint_Strategy_T.h.

template<class T_StreamEndpoint, class T_VDev, class T_MediaCtrl>
PortableServer::POA_ptr TAO_AV_Child_Process< T_StreamEndpoint, T_VDev, T_MediaCtrl >::poa_ [protected]
 

Definition at line 238 of file Endpoint_Strategy_T.h.

template<class T_StreamEndpoint, class T_VDev, class T_MediaCtrl>
T_StreamEndpoint* TAO_AV_Child_Process< T_StreamEndpoint, T_VDev, T_MediaCtrl >::stream_endpoint_ [protected]
 

The stream endpoint member.

Definition at line 216 of file Endpoint_Strategy_T.h.

template<class T_StreamEndpoint, class T_VDev, class T_MediaCtrl>
CosNaming::Name TAO_AV_Child_Process< T_StreamEndpoint, T_VDev, T_MediaCtrl >::stream_endpoint_name_ [protected]
 

Name of the stream_endpoint.

Definition at line 213 of file Endpoint_Strategy_T.h.

template<class T_StreamEndpoint, class T_VDev, class T_MediaCtrl>
T_VDev* TAO_AV_Child_Process< T_StreamEndpoint, T_VDev, T_MediaCtrl >::vdev_ [protected]
 

The virtual device.

Definition at line 219 of file Endpoint_Strategy_T.h.

template<class T_StreamEndpoint, class T_VDev, class T_MediaCtrl>
CosNaming::Name TAO_AV_Child_Process< T_StreamEndpoint, T_VDev, T_MediaCtrl >::vdev_name_ [protected]
 

Name of the vdev.

Definition at line 210 of file Endpoint_Strategy_T.h.

template<class T_StreamEndpoint, class T_VDev, class T_MediaCtrl>
CORBA::Object_var TAO_AV_Child_Process< T_StreamEndpoint, T_VDev, T_MediaCtrl >::vdev_obj_ [protected]
 

Virtual device CORBA object reference.

Definition at line 222 of file Endpoint_Strategy_T.h.

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