icinga2/lib/livestatus/minaggregator.hpp

60 lines
2.1 KiB
C++

/******************************************************************************
* Icinga 2 *
* Copyright (C) 2012-2018 Icinga Development Team (https://www.icinga.com/) *
* *
* 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 2 *
* 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, write to the Free Software Foundation *
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA. *
******************************************************************************/
#ifndef MINAGGREGATOR_H
#define MINAGGREGATOR_H
#include "livestatus/table.hpp"
#include "livestatus/aggregator.hpp"
#include <cfloat>
namespace icinga
{
/**
* @ingroup livestatus
*/
struct MinAggregatorState final : public AggregatorState
{
double Min{DBL_MAX};
};
/**
* @ingroup livestatus
*/
class MinAggregator final : public Aggregator
{
public:
DECLARE_PTR_TYPEDEFS(MinAggregator);
MinAggregator(String attr);
void Apply(const Table::Ptr& table, const Value& row, AggregatorState **state) override;
double GetResultAndFreeState(AggregatorState *state) const override;
private:
String m_MinAttr;
static MinAggregatorState *EnsureState(AggregatorState **state);
};
}
#endif /* MINAGGREGATOR_H */