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// -*- C++ -*-
//=============================================================================
/**
* @file Monitor_Admin.h
*
* @author Jeff Parsons <j.parsons@vanderbilt.edu>
*/
//=============================================================================
#ifndef MONITOR_ADMIN_H
#define MONITOR_ADMIN_H
#include /**/ "ace/pre.h"
#include "ace/Event_Handler.h"
#if !defined (ACE_LACKS_PRAGMA_ONCE)
#pragma once
#endif /* ACE_LACKS_PRAGMA_ONCE */
#if defined (ACE_HAS_MONITOR_FRAMEWORK) && (ACE_HAS_MONITOR_FRAMEWORK == 1)
#include "ace/Monitor_Base.h"
ACE_BEGIN_VERSIONED_NAMESPACE_DECL
namespace ACE
{
namespace Monitor_Control
{
class Monitor_Query;
/**
* @class Monitor_Point_Auto_Updater
*
* @brief Automates periodic updating of monitor point classes.
*
* A single instance of this class is held by the Admin
* class below. For a monitor point that must periodically
* check what they are monitoring, the admin class registers
* the monitor point with the ACE reactor. Each time the
* interval times out, the reactor will call the
* handle_timeout() method below, and pass in the appropriate
* monitor point. The handle_timeout() method will in turn
* call the appropriate method on the monitor point to get
* it to update its data.
*/
class Monitor_Point_Auto_Updater : public ACE_Event_Handler
{
public:
/// Override of ACE base class method.
virtual int handle_timeout (const ACE_Time_Value& interval,
const void* monitor_point);
};
/**
* @class Admin
*
* @brief Accesses monitor points or groups and manages the registries.
*
* Responsible for adding and removing monitor points and creating
* automatic periodic actions that update or query monitor points.
*/
class ACE_Export Monitor_Admin
{
public:
Monitor_Admin (void);
~Monitor_Admin (void);
/// Add or access monitor points in a global registry
/// If the ACE_Time_Value arg is non-zero,
/// the monitor point, the auto updater member, and the given time
/// interval are passed to our reactor's register_timeout()
/// method.
bool monitor_point (Monitor_Base* monitor_point,
const ACE_Time_Value& time);
Monitor_Base* monitor_point (const char* name);
/// Works similarly to monitor_point() above, but registers the
/// handler arg's handle_timeout() method with the reactor,
/// instead of our auto_updater_'s handle_timeout().
void auto_query (ACE_Event_Handler* handler,
Monitor_Query* query,
const ACE_Time_Value& time);
/// This mutator allows the application to create its own reactor
/// and substitute it for the default reactor.
void reactor (ACE_Reactor* new_reactor);
ACE_Reactor* reactor () const;
private:
Monitor_Point_Auto_Updater auto_updater_;
ACE_Reactor* reactor_;
bool default_reactor_;
};
}
}
ACE_END_VERSIONED_NAMESPACE_DECL
#endif /* ACE_HAS_MONITOR_FRAMEWORK==1 */
#include /**/ "ace/post.h"
#endif // MONITOR_ADMIN_H
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