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// -*- C++ -*-
//=============================================================================
/**
* @file CSD_TP_Cancel_Visitor.h
*
* @author Tim Bradley <bradley_t@ociweb.com>
*/
//=============================================================================
#ifndef TAO_CSD_TP_CANCEL_VISITOR_H
#define TAO_CSD_TP_CANCEL_VISITOR_H
#include /**/ "ace/pre.h"
#include "tao/CSD_ThreadPool/CSD_TP_Export.h"
#include "tao/PortableServer/Servant_Base.h"
#if !defined (ACE_LACKS_PRAGMA_ONCE)
# pragma once
#endif /* ACE_LACKS_PRAGMA_ONCE */
#include "tao/CSD_ThreadPool/CSD_TP_Queue_Visitor.h"
TAO_BEGIN_VERSIONED_NAMESPACE_DECL
namespace TAO
{
namespace CSD
{
/**
* @class TP_Cancel_Visitor
*
* @brief Used to extract/cancel request(s) from the queue.
*
* This visitor is used to cancel certain requests in the queue
* as they are visited.
*
* Note that this is currently implemented to cancel *all*
* requests in the queue, or requests that are targeted for a specific
* servant. This could be extended in the future to perhaps
* cancel all requests that have the same operation name, or something
* else.
*
*/
class TAO_CSD_TP_Export TP_Cancel_Visitor : public TP_Queue_Visitor
{
public:
/// Default Constructor - cancel *all* requests.
TP_Cancel_Visitor();
/// Constructor with provided servant - cancel requests that
/// target the supplied servant.
TP_Cancel_Visitor(PortableServer::Servant servant);
/// Virtual Destructor.
virtual ~TP_Cancel_Visitor();
/// Returns true to continue visitation. Returns false to stop
/// visitation. Sets the remove_flag to true if the request should
/// be removed from the queue as a result of the visit. Leaves the
/// remove_flag alone otherwise.
virtual bool visit_request(TP_Request* request, bool& remove_flag);
private:
/// Left as nil if we are to cancel all requests, or set to a specific
/// servant if only requests targeting that servant should be cancelled.
PortableServer::ServantBase_var servant_;
};
}
}
TAO_END_VERSIONED_NAMESPACE_DECL
#if defined (__ACE_INLINE__)
# include "tao/CSD_ThreadPool/CSD_TP_Cancel_Visitor.inl"
#endif /* __ACE_INLINE__ */
#include /**/ "ace/post.h"
#endif /* TAO_CSD_TP_DISPATCHABLE_VISITOR_H */
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