granicus.if.org Git - icinga2/blob - lib/livestatus/avgaggregator.cpp

   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,            *
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  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the              *
  13  * GNU General Public License for more details.                               *
  14  *                                                                            *
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  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 #include "livestatus/avgaggregator.hpp"
  21
  22 using namespace icinga;
  23
  24 AvgAggregator::AvgAggregator(String attr)
  25         : m_AvgAttr(std::move(attr))
  26 { }
  27
  28 AvgAggregatorState *AvgAggregator::EnsureState(AggregatorState **state)
  29 {
  30         if (!*state)
  31                 *state = new AvgAggregatorState();
  32
  33         return static_cast<AvgAggregatorState *>(*state);
  34 }
  35
  36 void AvgAggregator::Apply(const Table::Ptr& table, const Value& row, AggregatorState **state)
  37 {
  38         Column column = table->GetColumn(m_AvgAttr);
  39
  40         Value value = column.ExtractValue(row);
  41
  42         AvgAggregatorState *pstate = EnsureState(state);
  43
  44         pstate->Avg += value;
  45         pstate->AvgCount++;
  46 }
  47
  48 double AvgAggregator::GetResultAndFreeState(AggregatorState *state) const
  49 {
  50         AvgAggregatorState *pstate = EnsureState(&state);
  51         double result = pstate->Avg / pstate->AvgCount;
  52         delete pstate;
  53
  54         return result;
  55 }