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59 lines
2 KiB
C++
59 lines
2 KiB
C++
/*
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*
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* (C) 2013-23 - ntop.org
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*
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*
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*/
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#ifndef _MONITORED_GAUGE_H_
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#define _MONITORED_GAUGE_H_
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template <typename METRICTYPE>
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class MonitoredGauge : public MonitoredMetric<METRICTYPE> {
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public:
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void computeAnomalyIndex(time_t when) {
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if ((when - this->last_update) >
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60 /* Do not update more frequently than a minute */) {
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/* https://en.wikipedia.org/wiki/Relative_strength_index RSI-like index */
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int64_t delta = ((int64_t)(this->value) - this->last_value) /
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(when - this->last_update);
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this->updateAnomalyIndex(when, delta);
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#ifdef MONITOREDGAUGE_DEBUG
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if (this->anomaly_index)
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printf(
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"%s[MonitoredGauge][value: %lu][delta: %ld][RSI: %lu][gains: "
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"%lu][losses: %lu]\n",
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this->is_misbehaving(when) ? "<<<***>>> Anomaly " : "",
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(unsigned long)this->value, (long)delta,
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(unsigned long)this->anomaly_index, (unsigned long)this->gains,
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(unsigned long)this->losses);
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#endif
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this->last_update = when, this->last_value = this->value;
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}
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}
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inline float dec(METRICTYPE v) {
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/* Don't worry about int/u_int, look at the arithmetics and you will see
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* that is always works */
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return (this->inc(-v));
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}
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};
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#endif /* _MONITORED_GAUGE_H_ */
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