Get specified algorithm object
| public static getAlgorithm ( string $algoName ) : Scalr_Scaling_Algorithms_DateTim\Scalr_Scaling_Algorithms_DateTime | Scalr_Scaling_Algorithms_Senso\Scalr_Scaling_Algorithms_Sensor | ||
| $algoName | string | Name of algorithm |
| return | Scalr_Scaling_Algorithms_DateTim\Scalr_Scaling_Algorithms_DateTime | Scalr_Scaling_Algorithms_Senso\Scalr_Scaling_Algorithms_Sensor | Algorithm object |
function getScalingDecision()
{
$algo = Entity\ScalingMetric::getAlgorithm($this->getMetric()->algorithm);
$sensor = Scalr_Scaling_Sensor::get($this->getMetric()->alias);
$dbFarmRole = DBFarmRole::LoadByID($this->farmRoleId);
if ($sensor) {
try {
$sensorValue = $sensor->getValue($dbFarmRole, $this);
if ($sensorValue === false) {
return Scalr_Scaling_Decision::NOOP;
}
} catch (Exception $e) {
$this->logger->warn(new FarmLogMessage($dbFarmRole->FarmID, sprintf("Unable to read Scaling Metric (%s) on farmrole %s value: %s", $this->getMetric()->alias, $dbFarmRole->ID, $e->getMessage())));
return Scalr_Scaling_Decision::NOOP;
}
$this->logger->debug(sprintf(_("Raw sensor value (id: %s, metric_id: %s, metric name: %s): %s"), $this->id, $this->metricId, $this->getMetric()->name, json_encode($sensorValue)));
switch ($this->getMetric()->calcFunction) {
case Entity\ScalingMetric::CALC_FUNCTION_AVERAGE:
$value = is_array($sensorValue) && count($sensorValue) != 0 ? @array_sum($sensorValue) / count($sensorValue) : 0;
break;
case Entity\ScalingMetric::CALC_FUNCTION_SUM:
$value = @array_sum($sensorValue);
break;
case Entity\ScalingMetric::CALC_FUNCTION_MAXIMUM:
$value = @max($sensorValue);
break;
case Entity\ScalingMetric::CALC_FUNCTION_MINIMUM:
$value = @min($sensorValue);
break;
default:
$value = $sensorValue[0];
}
$this->lastValue = round($value, 5);
// Sets the Server time to avoid differences between Database and Server time
$this->dtLastPolled = time();
$this->save(false, ['settings', 'metric_id']);
$invert = $sensor instanceof Scalr_Scaling_Sensors_Custom ? $this->getMetric()->isInvert : $sensor->isInvert;
} else {
$invert = false;
}
if ($this->getMetric()->name == 'DateAndTime') {
$decision = $algo->makeDecision($dbFarmRole, $this, $invert);
$this->instancesNumber = $algo->instancesNumber;
$this->lastValue = isset($algo->lastValue) ? $algo->lastValue : null;
return $decision;
} elseif ($this->getMetric()->name == 'FreeRam') {
if ($this->lastValue == 0) {
return Scalr_Scaling_Decision::NOOP;
} else {
return $algo->makeDecision($dbFarmRole, $this, $invert);
}
} else {
return $algo->makeDecision($dbFarmRole, $this, $invert);
}
}
function getScalingDecision()
{
$algo = Entity\ScalingMetric::getAlgorithm($this->getMetric()->algorithm);
$sensor = Scalr_Scaling_Sensor::get($this->getMetric()->alias);
$dbFarmRole = DBFarmRole::LoadByID($this->farmRoleId);
if ($sensor) {
try {
$sensorValue = $sensor->getValue($dbFarmRole, $this);
if ($sensorValue === false) {
return Scalr_Scaling_Decision::NOOP;
}
} catch (Exception $e) {
$this->logger->warn(new FarmLogMessage($dbFarmRole->FarmID, sprintf("Unable to read Scaling Metric (%s) on farmrole %s value: %s", $this->getMetric()->alias, $dbFarmRole->ID, $e->getMessage())));
return Scalr_Scaling_Decision::NOOP;
}
$this->logger->info(sprintf(_("Raw sensor value (id: %s, metric_id: %s, metric name: %s): %s"), $this->id, $this->metricId, $this->getMetric()->name, serialize($sensorValue)));
switch ($this->getMetric()->calcFunction) {
default:
$value = $sensorValue[0];
break;
case "avg":
$value = is_array($sensorValue) && count($sensorValue) != 0 ? @array_sum($sensorValue) / count($sensorValue) : 0;
break;
case "sum":
$value = @array_sum($sensorValue);
break;
case "max":
$value = @max($sensorValue);
break;
}
$this->lastValue = round($value, 5);
$this->save();
$invert = $sensor->isInvert;
} else {
$invert = false;
}
if ($this->getMetric()->name == 'DateAndTime') {
$decision = $algo->makeDecision($dbFarmRole, $this, $invert);
$this->instancesNumber = $algo->instancesNumber;
$this->lastValue = $algo->lastValue;
return $decision;
} elseif ($this->getMetric()->name == 'FreeRam') {
if ($this->lastValue == 0) {
return Scalr_Scaling_Decision::NOOP;
} else {
return $algo->makeDecision($dbFarmRole, $this, $invert);
}
} else {
return $algo->makeDecision($dbFarmRole, $this, $invert);
}
}