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/* -*- mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; -*-
* vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
*
* Copyright (C) 2008 Sun Microsystems, Toru Maesaka
* Copyright (C) 2010 Djellel Eddine Difallah
*
* 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_QUERY_CACHE_H
#define DRIZZLED_PLUGIN_QUERY_CACHE_H
#include "drizzled/plugin.h"
#include "drizzled/plugin/plugin.h"
#include <drizzled/sql_list.h>
namespace drizzled
{
class Session;
class select_result;
namespace plugin
{
/*
This is the API that a qcache plugin must implement.
*/
class QueryCache : public Plugin
{
private:
QueryCache();
QueryCache(const QueryCache &);
QueryCache& operator=(const QueryCache &);
public:
explicit QueryCache(std::string name_arg)
: Plugin(name_arg, "QueryCache")
{}
virtual ~QueryCache() {}
/* these are the Query Cache interface functions */
/* Lookup the cache and transmit the data back to the client */
virtual bool doIsCached(Session* session)= 0;
/* Lookup the cache and transmit the data back to the client */
virtual bool doSendCachedResultset(Session *session)= 0;
/* Send the current Resultset to the cache */
virtual bool doSetResultset(Session *session)= 0;
/* initiate a new Resultset (header) */
virtual bool doPrepareResultset(Session *session)= 0;
/* push a record to the current Resultset */
virtual bool doInsertRecord(Session *session, List<Item> &item)= 0;
static bool addPlugin(QueryCache *handler);
static void removePlugin(QueryCache *handler);
/* These are the functions called by the rest of the Drizzle server */
static bool isCached(Session *session);
static bool sendCachedResultset(Session *session);
static bool prepareResultset(Session *session);
static bool setResultset(Session *session);
static bool insertRecord(Session *session, List<Item> &item);
};
} /* namespace plugin */
} /* namespace drizzled */
#endif /* DRIZZLED_PLUGIN_QUERY_CACHE_H */
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