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// $Id$
// ============================================================================
//
// = LIBRARY
// TAO/examples/POA/On_Demand_Loading
//
// = FILENAME
// Servant_Locator.cpp
//
// = DESCRIPTION
// Implementation of ServantLocator_i class, used with a POA
// having a NON_RETAIN policy.
//
// = AUTHOR
// Kirthika Parameswaran <kirthika@cs.wustl.edu>
//
// ============================================================================
#include "Servant_Locator.h"
ACE_RCSID (On_Demand_Activation,
Servant_Locator,
"$Id$")
// Initialization.
ServantLocator_i::ServantLocator_i (CORBA::ORB_ptr orb)
: servant_manager_ (orb)
{
}
// This method associates an servant with the ObjectID.
PortableServer::Servant
ServantLocator_i::preinvoke (const PortableServer::ObjectId &oid,
PortableServer::POA_ptr poa,
const char * /* operation */,
PortableServer::ServantLocator::Cookie &cookie
ACE_ENV_ARG_DECL)
ACE_THROW_SPEC ((CORBA::SystemException,
PortableServer::ForwardRequest))
{
// Convert ObjectID to String.
CORBA::String_var s =
PortableServer::ObjectId_to_string (oid);
// If ObjectID string has a test substring create and return a
// test_i.
PortableServer::Servant servant =
this->servant_manager_.obtain_servant (s.in (),
poa);
if (servant != 0)
{
// Return the servant as the cookie , used as a check when
// postinvoke is called on this ServantLocator_i.
cookie = servant;
return servant;
}
else
ACE_THROW_RETURN (CORBA::OBJECT_NOT_EXIST (),
0);
}
// Since the servant gets invoked per operation, the servant has to be
// destroyed per operation too. This is accomplished in the
// postinvoke method.
void
ServantLocator_i::postinvoke (const PortableServer::ObjectId &oid,
PortableServer::POA_ptr /* poa */,
const char * /* operation */,
PortableServer::ServantLocator::Cookie cookie,
PortableServer::Servant servant
ACE_ENV_ARG_DECL_NOT_USED)
ACE_THROW_SPEC ((CORBA::SystemException))
{
// Check the passed servant with the cookie.
PortableServer::Servant my_servant =
reinterpret_cast<PortableServer::Servant> (cookie);
ACE_ASSERT (servant == my_servant);
this->servant_manager_.destroy_servant (servant,
oid);
// To avoid warning about unused variable with ACE_NDEBUG.
ACE_UNUSED_ARG (my_servant);
}
// This method returns an ObjectId when given an dll name and the
// factory function to be invoked in the dll. The format of the
// ObjectId is libname:factory_function.
PortableServer::ObjectId_var
ServantLocator_i::create_dll_object_id (const char *dllname,
const char *factory_function)
{
return this->servant_manager_.create_dll_object_id (dllname,
factory_function);
}
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