[tao-users] Singleton CORBA object

[Siddharth Kulkarni]

Hi!
Following is the psuedo code

//MainCORBAImpl.h
class CMainCORBAImpl
{
    public:
            XServicePtr GetXService();

   private:
      XServicePtr m_XSvc;
      PortableServer::servant_var<Servant>   m_pServant;
};


//MainCORBAImpl.cpp

XServicePtr CMainCORBAImpl::GetXService()
{
 try
 {
  if(m_pServant== nullptr)
  {
      m_pServant= create_servant();
      PortableServer::ObjectId *oid =
m_poa->activate_object(m_pServant.in()); // ref count=2
  CORBA::Object_ptr retobj = m_poa->id_to_reference(*oid);
m_XSvc= ::XService::_narrow(retobj);
  m_pServant->_remove_ref();

if (::CORBA::is_nil(m_XSvc))
{
                     //throw exception
                }
  }
 }
 catch(...)
 {
   //throw exception
 }
  return m_XSvc;
}

The multiple calls to GetXService() is causing crash. The debugger points
to the following CORBA skeleton code

template<typename S_ptr,
         typename S_var,
         class Insert_Policy>
CORBA::Boolean
TAO::Ret_Object_SArgument_T<S_ptr,S_var,Insert_Policy>::marshal
(TAO_OutputCDR &cdr)
{
  return cdr << this->x_.in ();
}

Thanks & Regards
Siddharth

On Tue, Sep 29, 2015 at 3:58 PM, Christian Fromme <christian at ast.dfs.de>
wrote:

> On 29.09. 15:22, Siddharth Kulkarni wrote:
> > I am using ACE/TAO and having a general question regarding CORBA.
> > I am facing the scenario where the CORBA server need to return same CORBA
> > object again and again. I am facing server crash while returning the
> object
> > after two to three times.
> > I am creating and activating the object once and keep in memory. Then
> upon
> > client request returning the same object. Hence it is kind of singleton
> > object.
> > Can anybody suggest whether the given strategy is wrong? Then what is the
> > correct strategy in this scenario.
>
> How exactly are you returning the object? (IDL and implementation code)
>
> Best,
> Christian
>
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