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/* -*- C++ -*- */
// $Id$
//
// ============================================================================
//
// = LIBRARY
// ORBSVCS Cos Event Channel
//
// = FILENAME
// CEC_Reactive_Pulling_Strategy
//
// = AUTHOR
// Carlos O'Ryan (coryan@cs.wustl.edu)
//
// = CREDITS
//
// ============================================================================
#ifndef TAO_CEC_REACTIVE_PULLING_STRATEGY_H
#include "ace/pre.h"
#define TAO_CEC_REACTIVE_PULLING_STRATEGY_H
#include "CEC_Pulling_Strategy.h"
#if !defined (ACE_LACKS_PRAGMA_ONCE)
# pragma once
#endif /* ACE_LACKS_PRAGMA_ONCE */
#include "orbsvcs/Event/EC_Worker.h"
#include "tao/corba.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_ORBSVCS_Export TAO_CEC_Pulling_Strategy_Adapter : public ACE_Event_Handler
{
// = TITLE
// Forwards timeout events to the Reactive Pulling Strategy
//
// = DESCRIPTION
// The Reactive Pulling Strategy strategy uses the reactor to
// periodically wakeup and try top pull events from each
// PullSupplier connected to the EventChannel.
//
public:
TAO_CEC_Pulling_Strategy_Adapter (TAO_CEC_Reactive_Pulling_Strategy *adaptee);
// Constructor
// = Documented in ACE_Event_Handler.
virtual int handle_timeout (const ACE_Time_Value &tv,
const void *arg = 0);
private:
TAO_CEC_Reactive_Pulling_Strategy *adaptee_;
// The adapted object
};
// ****************************************************************
class TAO_ORBSVCS_Export TAO_CEC_Reactive_Pulling_Strategy : public TAO_CEC_Pulling_Strategy
{
// = TITLE
// Dispatch using the caller thread.
//
// = DESCRIPTION
// The events are dispatched in FIFO ordering, using the invoking
// thread to push the event to the consumer.
//
public:
TAO_CEC_Reactive_Pulling_Strategy (const ACE_Time_Value &rate,
TAO_CEC_EventChannel *event_channel,
CORBA::ORB_ptr orb);
// The scheduler is used to find the range of priorities and similar
// info.
void handle_timeout (const ACE_Time_Value &tv,
const void* arg);
// Receive the timeout from the adapter
// = The CEC_Pulling_Strategy methods.
virtual void activate (void);
virtual void shutdown (void);
private:
TAO_CEC_Pulling_Strategy_Adapter adapter_;
// The Adapter for the reactor events
ACE_Time_Value rate_;
// The polling rate
TAO_CEC_EventChannel *event_channel_;
// The event channel
CORBA::ORB_var orb_;
// The ORB
CORBA::PolicyCurrent_var policy_current_;
// To control the timeout policy in the thread
CORBA::PolicyList policy_list_;
// Precomputed policy list to the set timeout.
ACE_Reactor *reactor_;
// The ORB reactor
};
// ****************************************************************
class TAO_CEC_Pull_Event : public TAO_EC_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,
CORBA::Environment &ACE_TRY_ENV);
private:
TAO_CEC_ConsumerAdmin *consumer_admin_;
// Used to propagate the events.
TAO_CEC_SupplierControl *supplier_control_;
// To report failed or dead suppliers
};
#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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