granicus.if.org Git - icinga2/blob - lib/livestatus/sumaggregator.hpp

   1 /******************************************************************************
   2  * Icinga 2                                                                   *
   3  * Copyright (C) 2012-2018 Icinga Development Team (https://www.icinga.com/)  *
   4  *                                                                            *
   5  * This program is free software; you can redistribute it and/or              *
   6  * modify it under the terms of the GNU General Public License                *
   7  * as published by the Free Software Foundation; either version 2             *
   8  * of the License, or (at your option) any later version.                     *
   9  *                                                                            *
  10  * This program is distributed in the hope that it will be useful,            *
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of             *
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the              *
  13  * GNU General Public License for more details.                               *
  14  *                                                                            *
  15  * You should have received a copy of the GNU General Public License          *
  16  * along with this program; if not, write to the Free Software Foundation     *
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA.             *
  18  ******************************************************************************/
  19
  20 #ifndef SUMAGGREGATOR_H
  21 #define SUMAGGREGATOR_H
  22
  23 #include "livestatus/table.hpp"
  24 #include "livestatus/aggregator.hpp"
  25
  26 namespace icinga
  27 {
  28
  29 /**
  30  * @ingroup livestatus
  31  */
  32 struct SumAggregatorState final : public AggregatorState
  33 {
  34         double Sum{0};
  35 };
  36
  37 /**
  38  * @ingroup livestatus
  39  */
  40 class SumAggregator final : public Aggregator
  41 {
  42 public:
  43         DECLARE_PTR_TYPEDEFS(SumAggregator);
  44
  45         SumAggregator(String attr);
  46
  47         void Apply(const Table::Ptr& table, const Value& row, AggregatorState **state) override;
  48         double GetResultAndFreeState(AggregatorState *state) const override;
  49
  50 private:
  51         String m_SumAttr;
  52
  53         static SumAggregatorState *EnsureState(AggregatorState **state);
  54 };
  55
  56 }
  57
  58 #endif /* SUMAGGREGATOR_H */