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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
*
* 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
*/
#ifndef DRIZZLED_PLUGIN_SCHEDULER_H
#define DRIZZLED_PLUGIN_SCHEDULER_H
#include <string>
#include <vector>
namespace drizzled
{
namespace plugin
{
/**
* This class should be used by scheduler plugins to implement custom session
* schedulers.
*/
class Scheduler
{
public:
Scheduler() {}
virtual ~Scheduler() {}
/**
* Add a session to the scheduler. When the scheduler is ready to run the
* session, it should call session->run().
*/
virtual bool addSession(Session *session)= 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(Session *) {}
};
class SchedulerFactory
{
std::string name;
std::vector<std::string> aliases;
protected:
Scheduler *scheduler;
public:
SchedulerFactory(std::string name_arg): name(name_arg), scheduler(NULL) {}
SchedulerFactory(const char *name_arg): name(name_arg), scheduler(NULL) {}
virtual ~SchedulerFactory() {}
virtual Scheduler *operator()(void)= 0;
std::string getName() const {return name;}
const std::vector<std::string>& getAliases() const {return aliases;}
void addAlias(std::string alias)
{
aliases.push_back(alias);
}
};
} /* end namespace drizzled::plugin */
} /* end namespace drizzled */
#endif /* DRIZZLED_PLUGIN_SCHEDULER_H */
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