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// This may look like C, but it's really -*- C++ -*-
//=============================================================================
/**
* @file Servant_Activator.h
*
* Defines a <ServantActivator_i> class, which uses a
* Servant_Manager to activate a servant by loading it and
* associates it with an object on-demand.
*
* @author Kirthika Parameswaran <kirthika@cs.wustl.edu>
*/
//=============================================================================
#ifndef SERVANT_ACTIVATOR_H
#define SERVANT_ACTIVATOR_H
#include "Servant_Manager.h"
#include "tao/PortableServer/ServantActivatorC.h"
#include "tao/LocalObject.h"
/**
* Servant Activator for the test servant.
*
* This class associates an unassociated servant with an object in
* the POA Active Object Map.
*/
class ServantActivator_i :
public virtual PortableServer::ServantActivator,
public virtual ::CORBA::LocalObject
{
public:
/// Initialization.
ServantActivator_i (CORBA::ORB_ptr orb);
/**
* This method is invoked by a POA with USE_SERVANT_MANAGER and
* RETAIN policies, whenever it receives a request for a test object
* that is not currently active. When an servant pointer
* corresponding to objectId is not found in the Active Object Map,
* the POA hands over the job of obtaining the servant to the
* Servant Manager. Depending upon whether the POA is created with
* RETAIN or NON_RETAIN as the servant_retention policy, the Servant
* Activator or the Servant Locator interface is invoked
* respectively.
*/
virtual PortableServer::Servant incarnate (const PortableServer::ObjectId &oid,
PortableServer::POA_ptr poa);
/**
* This method is invoked whenever a test servant is
* deactivated. This occurs when the POA is destroyed or the Object
* is deactivated. When the POA is getting destroyed, it needs to
* deactivate every object in the Active Object Map and on that call
* the ServantActivator invokes this method which will destroy the
* servant associated with the object.
*/
virtual void etherealize (const PortableServer::ObjectId &oid,
PortableServer::POA_ptr adapter,
PortableServer::Servant servant,
CORBA::Boolean cleanup_in_progress,
CORBA::Boolean remaining_activations);
/// Returns an ObjectId when given a DLL name and the factory
/// function in the DLL that will create an appropriate Servant.
PortableServer::ObjectId_var create_dll_object_id (const char *dllname,
const char *factory_function);
private:
/**
* An ServantManager object that provides utility methods. The
* methods include obtaining the servant using an ACE_DLL object,
* destroying the servant and extracting the dllname and factory
* function from the ObjectId.
*/
ServantManager_i servant_manager_;
};
#endif /* SERVANT_ACTIVATOR_H */
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