icinga2/lib/livestatus/maxaggregator.cpp

56 lines
2.2 KiB
C++

/******************************************************************************
* Icinga 2 *
* Copyright (C) 2012-2017 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. *
******************************************************************************/
#include "livestatus/maxaggregator.hpp"
using namespace icinga;
MaxAggregator::MaxAggregator(const String& attr)
: m_MaxAttr(attr)
{ }
MaxAggregatorState *MaxAggregator::EnsureState(AggregatorState **state)
{
if (!*state)
*state = new MaxAggregatorState();
return static_cast<MaxAggregatorState *>(*state);
}
void MaxAggregator::Apply(const Table::Ptr& table, const Value& row, AggregatorState **state)
{
Column column = table->GetColumn(m_MaxAttr);
Value value = column.ExtractValue(row);
MaxAggregatorState *pstate = EnsureState(state);
if (value > pstate->Max)
pstate->Max = value;
}
double MaxAggregator::GetResultAndFreeState(AggregatorState *state) const
{
MaxAggregatorState *pstate = EnsureState(&state);
double result = pstate->Max;
delete pstate;
return result;
}