granicus.if.org Git - icinga2/blob - lib/icinga/checkable-flapping.cpp

   1 /******************************************************************************
   2  * Icinga 2                                                                   *
   3  * Copyright (C) 2012-2015 Icinga Development Team (http://www.icinga.org)    *
   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 #include "icinga/checkable.hpp"
  21 #include "icinga/icingaapplication.hpp"
  22 #include "base/utility.hpp"
  23 #include <boost/foreach.hpp>
  24
  25 using namespace icinga;
  26
  27 #define FLAPPING_INTERVAL (30 * 60)
  28
  29 double Checkable::GetFlappingCurrent(void) const
  30 {
  31         if (GetFlappingPositive() + GetFlappingNegative() <= 0)
  32                 return 0;
  33
  34         return 100 * GetFlappingPositive() / (GetFlappingPositive() + GetFlappingNegative());
  35 }
  36
  37 void Checkable::UpdateFlappingStatus(bool stateChange)
  38 {
  39         double ts, now;
  40         long positive, negative;
  41
  42         now = Utility::GetTime();
  43
  44         ts = GetFlappingLastChange();
  45         positive = GetFlappingPositive();
  46         negative = GetFlappingNegative();
  47
  48         double diff = now - ts;
  49
  50         if (positive + negative > FLAPPING_INTERVAL) {
  51                 double pct = (positive + negative - FLAPPING_INTERVAL) / FLAPPING_INTERVAL;
  52                 positive -= pct * positive;
  53                 negative -= pct * negative;
  54         }
  55
  56         if (stateChange)
  57                 positive += diff;
  58         else
  59                 negative += diff;
  60
  61         if (positive < 0)
  62                 positive = 0;
  63
  64         if (negative < 0)
  65                 negative = 0;
  66
  67 //      Log(LogDebug, "Checkable")
  68 //          << "Flapping counter for '" << GetName() << "' is positive=" << positive << ", negative=" << negative;
  69
  70         SetFlappingLastChange(now);
  71         SetFlappingPositive(positive);
  72         SetFlappingNegative(negative);
  73 }
  74
  75 bool Checkable::IsFlapping(void) const
  76 {
  77         if (!GetEnableFlapping() || !IcingaApplication::GetInstance()->GetEnableFlapping())
  78                 return false;
  79         else
  80                 return GetFlappingCurrent() > GetFlappingThreshold();
  81 }