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/* -*- C++ -*- */
//=============================================================================
/**
* @file CEC_Reactive_Pulling_Strategy.h
*
* $Id$
*
* @author Carlos O'Ryan (coryan@cs.wustl.edu)
*/
//=============================================================================
#ifndef TAO_CEC_REACTIVE_PULLING_STRATEGY_H
#define TAO_CEC_REACTIVE_PULLING_STRATEGY_H
#include /**/ "ace/pre.h"
#include "CEC_Pulling_Strategy.h"
#if !defined (ACE_LACKS_PRAGMA_ONCE)
# pragma once
#endif /* ACE_LACKS_PRAGMA_ONCE */
#include "orbsvcs/ESF/ESF_Worker.h"
#include "tao/ORB.h"
#include "tao/PolicyC.h"
#include "ace/Event_Handler.h"
class TAO_CEC_ProxyPullConsumer;
class TAO_CEC_EventChannel;
class TAO_CEC_ConsumerAdmin;
class TAO_CEC_SupplierControl;
class TAO_CEC_Reactive_Pulling_Strategy;
/**
* @class TAO_CEC_Pulling_Strategy_Adapter
*
* @brief Forwards timeout events to the Reactive Pulling Strategy
*
* The Reactive Pulling Strategy strategy uses the reactor to
* periodically wakeup and try top pull events from each
* PullSupplier connected to the EventChannel.
*/
class TAO_Event_Serv_Export TAO_CEC_Pulling_Strategy_Adapter : public ACE_Event_Handler
{
public:
/// Constructor
TAO_CEC_Pulling_Strategy_Adapter (TAO_CEC_Reactive_Pulling_Strategy *adaptee);
// = Documented in ACE_Event_Handler.
virtual int handle_timeout (const ACE_Time_Value &tv,
const void *arg = 0);
private:
/// The adapted object
TAO_CEC_Reactive_Pulling_Strategy *adaptee_;
};
// ****************************************************************
/**
* @class TAO_CEC_Reactive_Pulling_Strategy
*
* @brief Dispatch using the caller thread.
*
* The events are dispatched in FIFO ordering, using the invoking
* thread to push the event to the consumer.
*/
class TAO_Event_Serv_Export TAO_CEC_Reactive_Pulling_Strategy : public TAO_CEC_Pulling_Strategy
{
public:
/// The scheduler is used to find the range of priorities and similar
/// info.
TAO_CEC_Reactive_Pulling_Strategy (const ACE_Time_Value &rate,
const ACE_Time_Value &relative_timeout,
TAO_CEC_EventChannel *event_channel,
CORBA::ORB_ptr orb);
/// Receive the timeout from the adapter
void handle_timeout (const ACE_Time_Value &tv,
const void* arg);
// = The CEC_Pulling_Strategy methods.
virtual void activate (void);
virtual void shutdown (void);
private:
/// The Adapter for the reactor events
TAO_CEC_Pulling_Strategy_Adapter adapter_;
/// The polling rate
ACE_Time_Value rate_;
/// The relative timeout
ACE_Time_Value relative_timeout_;
/// The event channel
TAO_CEC_EventChannel *event_channel_;
/// The ORB
CORBA::ORB_var orb_;
/// To control the timeout policy in the thread
CORBA::PolicyCurrent_var policy_current_;
/// Precomputed policy list to the set timeout.
CORBA::PolicyList policy_list_;
/// The ORB reactor
ACE_Reactor *reactor_;
#if defined (TAO_HAS_CORBA_MESSAGING) && TAO_HAS_CORBA_MESSAGING != 0
/// The timer id
int timer_id_;
#endif /* TAO_HAS_CORBA_MESSAGING */
};
// ****************************************************************
class TAO_CEC_Pull_Event : public TAO_ESF_Worker<TAO_CEC_ProxyPullConsumer>
{
public:
TAO_CEC_Pull_Event (TAO_CEC_ConsumerAdmin *consumer_admin,
TAO_CEC_SupplierControl *control);
virtual void work (TAO_CEC_ProxyPullConsumer *consumer
ACE_ENV_ARG_DECL);
private:
/// Used to propagate the events.
TAO_CEC_ConsumerAdmin *consumer_admin_;
/// To report failed or dead suppliers
TAO_CEC_SupplierControl *supplier_control_;
};
#if defined (__ACE_INLINE__)
#include "CEC_Reactive_Pulling_Strategy.i"
#endif /* __ACE_INLINE__ */
#include /**/ "ace/post.h"
#endif /* TAO_CEC_REACTIVE_PULLING_STRATEGY_H */
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