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/* -*- C++ -*- */
//=============================================================================
/**
* @file CEC_ProxyPullConsumer.h
*
* $Id$
*
* @author Carlos O'Ryan (coryan@cs.wustl.edu)
*/
//=============================================================================
#ifndef TAO_CEC_PROXYPULLCONSUMER_H
#define TAO_CEC_PROXYPULLCONSUMER_H
#include /**/ "ace/pre.h"
#include "orbsvcs/orbsvcs/CosEventChannelAdminS.h"
#if !defined (ACE_LACKS_PRAGMA_ONCE)
# pragma once
#endif /* ACE_LACKS_PRAGMA_ONCE */
#include "orbsvcs/orbsvcs/ESF/ESF_Worker.h"
#include "event_export.h"
class TAO_CEC_EventChannel;
class TAO_CEC_Dispatching;
class TAO_CEC_ProxyPullSupplier;
/**
* @class TAO_CEC_ProxyPullConsumer
*
* @brief ProxyPullConsumer
*
* Implement the CosEventChannelAdmin::ProxyPullConsumer interface,
* remember that this class is used to communicate with a
* PullSupplier, so, in effect, this is the ambassador for a
* supplier inside the event channel.
* = MEMORY MANAGMENT
* The object commits suicide when disconnect_pull_consumer() is
* called.
*/
class TAO_Event_Export TAO_CEC_ProxyPullConsumer : public POA_CosEventChannelAdmin::ProxyPullConsumer
{
public:
typedef CosEventChannelAdmin::ProxyPullConsumer_ptr _ptr_type;
typedef CosEventChannelAdmin::ProxyPullConsumer_var _var_type;
/// constructor...
TAO_CEC_ProxyPullConsumer (TAO_CEC_EventChannel* event_channel);
/// destructor...
virtual ~TAO_CEC_ProxyPullConsumer (void);
/// Activate in the POA
virtual void activate (
CosEventChannelAdmin::ProxyPullConsumer_ptr &activated_proxy
ACE_ENV_ARG_DECL)
ACE_THROW_SPEC ((CORBA::SystemException));
/// Deactivate from the POA
virtual void deactivate (ACE_ENV_SINGLE_ARG_DECL)
ACE_THROW_SPEC ((CORBA::SystemException));
/// Return 0 if no supplier is connected...
CORBA::Boolean is_connected (void) const;
/// Return the consumer object reference. It returns nil() if it has
/// not connected yet.
CosEventComm::PullSupplier_ptr supplier (void) const;
/// Pulls from the supplier, verifies that it is connected.
CORBA::Any* try_pull_from_supplier (CORBA::Boolean_out has_event
ACE_ENV_ARG_DECL);
CORBA::Any* pull_from_supplier (ACE_ENV_SINGLE_ARG_DECL);
/**
* Invoke the _non_existent() pseudo-operation on the supplier. If
* it is disconnected then it returns true and sets the
* <disconnected> flag.
*/
CORBA::Boolean supplier_non_existent (CORBA::Boolean_out disconnected
ACE_ENV_ARG_DECL);
/// The event channel is shutting down
virtual void shutdown (ACE_ENV_SINGLE_ARG_DECL_NOT_USED);
/// Increment and decrement the reference count.
CORBA::ULong _incr_refcnt (void);
CORBA::ULong _decr_refcnt (void);
// = The CosEventChannelAdmin::ProxyPullConsumer methods...
virtual void connect_pull_supplier (
CosEventComm::PullSupplier_ptr pull_supplier
ACE_ENV_ARG_DECL_NOT_USED)
ACE_THROW_SPEC ((CORBA::SystemException,
CosEventChannelAdmin::AlreadyConnected));
virtual void disconnect_pull_consumer (ACE_ENV_SINGLE_ARG_DECL_NOT_USED)
ACE_THROW_SPEC ((CORBA::SystemException));
// = The Servant methods
virtual PortableServer::POA_ptr _default_POA (ACE_ENV_SINGLE_ARG_DECL);
virtual void _add_ref (ACE_ENV_SINGLE_ARG_DECL_WITH_DEFAULTS);
virtual void _remove_ref (ACE_ENV_SINGLE_ARG_DECL_WITH_DEFAULTS);
protected:
/// Set the supplier, used by some implementations to change the
/// policies used when invoking operations on the supplier.
void supplier (CosEventComm::PullSupplier_ptr supplier);
void supplier_i (CosEventComm::PullSupplier_ptr supplier);
/// The private version (without locking) of is_connected().
CORBA::Boolean is_connected_i (void) const;
/// Release the supplier
void cleanup_i (void);
private:
/// The supplier admin, used for activation and memory managment.
TAO_CEC_EventChannel* event_channel_;
/// The locking strategy.
ACE_Lock* lock_;
/// The reference count.
CORBA::ULong refcount_;
/// The supplier....
CosEventComm::PullSupplier_var supplier_;
/// Store the default POA.
PortableServer::POA_var default_POA_;
};
#if defined (__ACE_INLINE__)
#include "CEC_ProxyPullConsumer.i"
#endif /* __ACE_INLINE__ */
#include /**/ "ace/post.h"
#endif /* TAO_CEC_PROXYPULLCONSUMER_H */
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