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// stat_util.h
/**
* Copyright (C) 2008 10gen Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License, version 3,
* as published by the Free Software Foundation.
*
* 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 Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#pragma once
#include "../pch.h"
#include "../db/jsobj.h"
namespace mongo {
/**
* static methods useful for computing status from serverStatus type things
*/
class StatUtil {
public:
/**
* @param seconds - seconds between calls to serverStatus
* @param all - show all fields
*/
StatUtil( double seconds = 1 , bool all = false );
/**
* @param a older serverStatus
* @param b newer serverStatus
*/
BSONObj doRow( const BSONObj& a , const BSONObj& b );
double getSeconds() const { return _seconds; }
bool getAll() const { return _all; }
void setSeconds( double seconds ) { _seconds = seconds; }
void setAll( bool all ) { _all = all; }
private:
double percent( const char * outof , const char * val , const BSONObj& a , const BSONObj& b );
double diff( const string& name , const BSONObj& a , const BSONObj& b );
void _appendMem( BSONObjBuilder& result , const string& name , unsigned width , double sz );
void _appendNet( BSONObjBuilder& result , const string& name , double diff );
template<typename T>
void _append( BSONObjBuilder& result , const string& name , unsigned width , const T& t ) {
if ( name.size() > width )
width = name.size();
result.append( name , BSON( "width" << (int)width << "data" << t ) );
}
bool _in( const BSONElement& me , const BSONElement& arr );
// -------
double _seconds;
bool _all;
};
}
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