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/*
*
* (C) 2013-22 - ntop.org
*
*
* 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 3 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
*/
#ifndef _MONITORED_GAUGE_H_
#define _MONITORED_GAUGE_H_
template <typename METRICTYPE> class MonitoredGauge : public MonitoredMetric<METRICTYPE> {
public:
void computeAnomalyIndex(time_t when) {
if((when - this->last_update) > 60 /* Do not update more frequently than a minute */) {
/* https://en.wikipedia.org/wiki/Relative_strength_index RSI-like index */
int64_t delta = ((int64_t)(this->value) - this->last_value) / (when - this->last_update);
this->updateAnomalyIndex(when, delta);
#ifdef MONITOREDGAUGE_DEBUG
if(this->anomaly_index)
printf("%s[MonitoredGauge][value: %lu][delta: %ld][RSI: %lu][gains: %lu][losses: %lu]\n",
this->is_misbehaving(when) ? "<<<***>>> Anomaly " : "",
(unsigned long)this->value, (long)delta,
(unsigned long)this->anomaly_index, (unsigned long)this->gains, (unsigned long)this->losses);
#endif
this->last_update = when, this->last_value = this->value;
}
}
inline float dec(METRICTYPE v) {
/* Don't worry about int/u_int, look at the arithmetics and you will see that is always works */
return(this->inc(-v));
}
};
#endif /* _MONITORED_GAUGE_H_ */
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