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/* -*- C++ -*- */
/**
* @file EC_Reactive_ConsumerControl.h
*
* $Id$
*
* @author Carlos O'Ryan (coryan@cs.wustl.edu)
*
* Based on previous work by Tim Harrison (harrison@cs.wustl.edu) and
* other members of the DOC group. More details can be found in:
*
* http://doc.ece.uci.edu/~coryan/EC/index.html
*/
#ifndef TAO_EC_REACTIVE_CONSUMERCONTROL_H
#define TAO_EC_REACTIVE_CONSUMERCONTROL_H
#include /**/ "ace/pre.h"
#include "EC_ConsumerControl.h"
#if !defined (ACE_LACKS_PRAGMA_ONCE)
# pragma once
#endif /* ACE_LACKS_PRAGMA_ONCE */
#include "orbsvcs/orbsvcs/ESF/ESF_Worker.h"
#include "tao/ORB.h"
#include "ace/Event_Handler.h"
class TAO_EC_Event_Channel_Base;
class TAO_EC_Reactive_ConsumerControl;
/**
* @class TAO_EC_ConsumerControl_Adapter
*
* @brief Forwards timeout events to the Reactive ConsumerControl
*
* The Reactive ConsumerControl strategy uses the reactor to
* periodically wakeup and verify the state of the consumers
* registered with the Event Channel.
*/
class TAO_RTEvent_Export TAO_EC_ConsumerControl_Adapter : public ACE_Event_Handler
{
public:
/// Constructor
TAO_EC_ConsumerControl_Adapter (TAO_EC_Reactive_ConsumerControl *adaptee);
// = Documented in ACE_Event_Handler.
virtual int handle_timeout (const ACE_Time_Value &tv,
const void *arg = 0);
private:
/// The adapted object
TAO_EC_Reactive_ConsumerControl *adaptee_;
};
/**
* @class TAO_EC_Reactive_ConsumerControl
*
* @brief ConsumerControl
*
* Defines the interface for the consumer control strategy.
* This strategy handles misbehaving or failing consumers.
*/
class TAO_RTEvent_Export TAO_EC_Reactive_ConsumerControl : public TAO_EC_ConsumerControl
{
public:
/// Constructor. It does not assume ownership of the @a event_channel
/// parameter.
TAO_EC_Reactive_ConsumerControl (const ACE_Time_Value &rate,
const ACE_Time_Value &timeout,
TAO_EC_Event_Channel_Base *event_channel,
CORBA::ORB_ptr orb);
/// Destructor.
virtual ~TAO_EC_Reactive_ConsumerControl (void);
/// Receive the timeout from the adapter
void handle_timeout (const ACE_Time_Value &tv,
const void* arg);
// = Documented in TAO_EC_ConsumerControl
virtual int activate (void);
virtual int shutdown (void);
virtual void consumer_not_exist (TAO_EC_ProxyPushSupplier *proxy
ACE_ENV_ARG_DECL_NOT_USED);
virtual void system_exception (TAO_EC_ProxyPushSupplier *proxy,
CORBA::SystemException &
ACE_ENV_ARG_DECL_NOT_USED);
private:
/// Check if the consumers still exists. It is a helper method for
/// handle_timeout() to isolate the exceptions.
void query_consumers (ACE_ENV_SINGLE_ARG_DECL);
private:
/// The polling rate
ACE_Time_Value rate_;
/// The polling timeout
ACE_Time_Value timeout_;
/// The Adapter for the reactor events
TAO_EC_ConsumerControl_Adapter adapter_;
/// The event channel
TAO_EC_Event_Channel_Base *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_;
};
// ****************************************************************
class TAO_EC_Ping_Consumer : public TAO_ESF_Worker<TAO_EC_ProxyPushSupplier>
{
public:
TAO_EC_Ping_Consumer (TAO_EC_ConsumerControl *control);
virtual void work (TAO_EC_ProxyPushSupplier *supplier
ACE_ENV_ARG_DECL);
private:
TAO_EC_ConsumerControl *control_;
};
#if defined (__ACE_INLINE__)
#include "EC_Reactive_ConsumerControl.i"
#endif /* __ACE_INLINE__ */
#include /**/ "ace/post.h"
#endif /* TAO_EC_CONSUMERCONTROL_H */
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