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/* -*- C++ -*- */
/**
* @file Kokyu.h
*
* $Id$
*
* @author Venkita Subramonian (venkita@cs.wustl.edu)
*
* Based on previous work by Tim Harrison Chris Gill,
* Carlos O'Ryan and other members of the DOC group.
*/
#ifndef KOKYU_H
#define KOKYU_H
#include /**/ "ace/pre.h"
#include "ace/Copy_Disabled.h"
#if !defined (ACE_LACKS_PRAGMA_ONCE)
# pragma once
#endif /* ACE_LACKS_PRAGMA_ONCE */
#include "kokyu_export.h"
#include "Kokyu_defs.h"
//Currently I am not seeing a way to avoid including these here. The
//whole purpose of the pImpl idiom is to avoid this dependency. But
//using the auto_ptr<> to store the implementation causes a compile
//error (in the destructor) that the implementation definition is not
//found. Note that the auto-ptr<T>::~auto_ptr() calls delete on the
//internal pointer and at this point the class definition needs to be
//visible. Need to revisit this and see whether there is a work
//around.
#include "Dispatcher_Impl.h"
//#################################################################
//Beware that this interface will be subject to change in the future
//since this is the very initial release. We will be working on
//trying to merge the DSRT and EC mechanisms in the future. If you
//are a user of this interface, kindly let us know so that we can
//coordinate with you when we refactor this interface.
//##################################################################
namespace Kokyu
{
//class Dispatcher_Impl;
/**
* @class Dispatcher
*
* @brief Interface class for dynamic scheduling of events
*
* The responsibility of this class is to forward all methods to
* its delegation/implementation class, e.g.,
* @c Default_Dispatcher_Impl. This class follows the pImpl idiom
* or the bridge pattern to separate the implementation from the interface.
* Dispatcher is the class that users will be using to achieve
* dynamic dispatching of events in an event channel.
*/
class Kokyu_Export Dispatcher : private ACE_Copy_Disabled
{
public:
/// Dispatch a command object based on the qos info supplied.
int dispatch (const Dispatch_Command*, const QoSDescriptor&);
/// Shut down the dispatcher. The dispatcher will stop processing requests.
int shutdown ();
/// Supply this interface with an appripriate implementation.
void implementation (Dispatcher_Impl*);
int activate ();
/// Non virtual destructor. Read as <b><i>this class not available
/// for inheritance<i></b>.
~Dispatcher ();
private:
/// Auto ptr to the implementation. Implementation will be created on the
/// heap and deleted automatically when the dispatcher object is destructed.
auto_ptr<Dispatcher_Impl> dispatcher_impl_;
};
typedef auto_ptr<Dispatcher> Dispatcher_Auto_Ptr;
/**
* @class Dispatcher_Factory
*
* @brief Factory class to create one of the dispatcher interface
* objects - for events.
*
* Factory class creates a dispatcher for EC and configures the
* interface object with the appropriate implementation.
*/
class Kokyu_Export Dispatcher_Factory : private ACE_Copy_Disabled
{
public:
/**
* Create a dispatcher for dynamic dispatching of commands
* (eg. events). The caller is responsible for freeing the
* returned dynamically allocated memory.
*
* @param config Configuration information for the dispatcher.
*
* @return pointer to the dispatcher.
*/
static Dispatcher*
create_dispatcher (const Dispatcher_Attributes& attr);
};
} //end of namespace
#if defined (__ACE_INLINE__)
#include "Kokyu.i"
#endif /* __ACE_INLINE__ */
#include /**/ "ace/post.h"
#endif /* KOKYU_H */
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