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/* - mode: c; c-basic-offset: 2; indent-tabs-mode: nil; -*-
* vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
*
* Copyright 2011 Daniel Nichter
*
* 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, either version 3 of the License, or
* (at your option) any later version.
*
* 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, see <http://www.gnu.org/licenses/>.
*/
#pragma once
#include <drizzled/plugin/event_observer.h>
#include "file.h"
#include "event.h"
namespace drizzled {
namespace plugin {
/**
* @brief
* QueryLog implements the query_log plugin.
*
* @details
* This is our event observer plugin subclass that sits between Drizzle
* and logger classes like QueryLoggerFile. This class encapsulates and
* manages data associated with the plugin: system variables and incoming
* events. The future plan is to have other logger classes, like
* QueryLoggerTable or QueryLoggerUDPSocket. So implemeting those should
* be easy because this class abstracts plugin data management from actual
* logging: it gets events from Drizzle, filters and prepares them, then
* sends them to logger classes which only have to log them.
*/
class QueryLog : public drizzled::plugin::EventObserver
{
public:
QueryLog(bool enabled, QueryLoggerFile *logger_file);
void registerSessionEventsDo(Session &session, EventObserverList &observers);
bool observeEventDo(EventData &);
bool afterStatement(AfterStatementEventData &data);
/**
* These are the query_log system variables. So sysvar_enabled is
* query_log_enabled in SHOW VARIABLES, etc. They are all global and dynamic.
*/
bool sysvar_enabled;
bool sysvar_file_enabled;
std::string sysvar_file;
uint32_constraint sysvar_threshold_execution_time;
uint32_constraint sysvar_threshold_lock_time;
uint32_constraint sysvar_threshold_rows_examined;
uint32_constraint sysvar_threshold_rows_sent;
uint32_constraint sysvar_threshold_tmp_tables;
uint32_constraint sysvar_threshold_warnings;
uint32_constraint sysvar_threshold_session_time;
private:
QueryLoggerFile *_logger_file;
event_t _event;
};
} /* namespace plugin */
} /* namespace drizzled */
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