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/* -*- mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; -*-
* vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
*
* Definitions required for Configuration Variables plugin
*
* Copyright (C) 2008 Sun Microsystems, Inc.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#pragma once
#include <drizzled/plugin/plugin.h>
#include <drizzled/session.h>
#include <drizzled/visibility.h>
namespace drizzled {
namespace plugin {
/**
* This class should be used by scheduler plugins to implement custom session
* schedulers.
*/
class DRIZZLED_API Scheduler : public Plugin
{
public:
explicit Scheduler(std::string name_arg)
: Plugin(name_arg, "Scheduler")
{}
/**
* Add a session to the scheduler. When the scheduler is ready to run the
* session, it should call session->run().
*/
virtual bool addSession(const Session::shared_ptr&)= 0;
/**
* Notify the scheduler that it should be killed gracefully.
*/
virtual void killSession(Session*) {}
/**
* This is called when a scheduler should kill the session immedaitely.
*/
virtual void killSessionNow(const Session::shared_ptr&) {}
static bool addPlugin(plugin::Scheduler*);
static void removePlugin(plugin::Scheduler*);
static bool setPlugin(const std::string& name);
static Scheduler* getScheduler();
};
} /* namespace plugin */
} /* namespace drizzled */
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