| 38 | }; |
| 39 | |
| 40 | void Checkable::UpdateFlappingStatus(ServiceState newState) |
| 41 | { |
| 42 | Bitset<unsigned long> stateChangeBuf = GetFlappingBuffer(); |
| 43 | int oldestIndex = GetFlappingIndex(); |
| 44 | |
| 45 | ServiceState lastState = GetFlappingLastState(); |
| 46 | bool stateChange = false; |
| 47 | |
| 48 | int stateFilter = GetFlappingIgnoreStatesFilter(); |
| 49 | |
| 50 | /* Only count as state change if no state filter is set or the new state isn't filtered out */ |
| 51 | if (stateFilter == -1 || !(ServiceStateToFlappingFilter(newState) & stateFilter)) { |
| 52 | stateChange = newState != lastState; |
| 53 | SetFlappingLastState(newState); |
| 54 | } |
| 55 | |
| 56 | stateChangeBuf.Modify(oldestIndex, stateChange); |
| 57 | oldestIndex = (oldestIndex + 1) % 20; |
| 58 | |
| 59 | double stateChanges = 0; |
| 60 | |
| 61 | /* Iterate over our state array and compute a weighted total */ |
| 62 | for (int i = 0; i < 20; i++) { |
| 63 | if (stateChangeBuf.Get((oldestIndex + i) % 20)) |
| 64 | stateChanges += 0.8 + (0.02 * i); |
| 65 | } |
| 66 | |
| 67 | double flappingValue = 100.0 * stateChanges / 20.0; |
| 68 | |
| 69 | bool flapping; |
| 70 | |
| 71 | if (GetFlapping()) |
| 72 | flapping = flappingValue > GetFlappingThresholdLow(); |
| 73 | else |
| 74 | flapping = flappingValue > GetFlappingThresholdHigh(); |
| 75 | |
| 76 | SetFlappingBuffer(stateChangeBuf.GetValue()); |
| 77 | SetFlappingIndex(oldestIndex); |
| 78 | SetFlappingCurrent(flappingValue); |
| 79 | |
| 80 | if (flapping != GetFlapping()) { |
| 81 | SetFlapping(flapping, true); |
| 82 | |
| 83 | double ee = GetLastCheckResult()->GetExecutionEnd(); |
| 84 | |
| 85 | if (GetEnableFlapping() && IcingaApplication::GetInstance()->GetEnableFlapping()) { |
| 86 | OnFlappingChange(this, ee); |
| 87 | } |
| 88 | |
| 89 | SetFlappingLastChange(ee); |
| 90 | } |
| 91 | } |
| 92 | |
| 93 | bool Checkable::IsFlapping() const |
| 94 | { |