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some performance optimizions in the frontend

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git-svn-id: file:///home/jan/tmp/wetterstation/trunk@222 dd492736-c11a-0410-ad51-8c26713eaf7f
This commit is contained in:
losinshi
2007-02-12 00:06:56 +00:00
parent 194ad4d412
commit 288f351cb6
8 changed files with 206 additions and 160 deletions
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webstuff/frontend/php_inc/modules/press.inc.php
+36 -30
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@@ -9,14 +9,17 @@
class Press{
var $nowPress; /* Momentaner Luftdruck */
var $nowDate; /* datum des letzten Messvorgangs */
var $avVal; /* Durchschnittswert */
var $avInter; /* Interval des Durchschnittswertes */
var $nowDate; /* datum des letzten Messvorgangs */
var $avVal = "nc"; /* Durchschnittswert */
var $avInter = "nc"; /* Interval des Durchschnittswertes */
var $minPress; /* Minimaler Luftdruck */
var $minDate; /* Datum, wann der Minimale Luftdruck gemessen wurde */
var $minDate; /* Datum, wann der Minimale Luftdruck gemessen wurde */
var $maxPress; /* Maximale Luftdruck */
var $maxDate; /* Datum, wann der Max. Luftdruck gemessen wurde */
var $changing; /* Tendenz */
var $maxDate; /* Datum, wann der Max. Luftdruck gemessen wurde */
var $changing = "nc"; /* Tendenz */
var $connection;
var $sensId;
var $table;
/* Konstruktor */
function Press($sensId, & $connection){
@@ -25,70 +28,67 @@ class Press{
/* Funktion, die die Klasse mit den Weten initialisiert */
function _fetchPressData($sensId, &$connection){
$this->connection = &$connection;
$this->sensId = $sensId;
/* Tabelle des Sensors bestimmen */
$tableQuery = "SELECT tabelle FROM sensoren, typen WHERE sensoren.id=".$sensId." AND typen.typ = sensoren.typ";
$table = $connection->fetchQueryResultLine($tableQuery);
$this->table = $table['tabelle'];
/* Aktuelle Luftdruck bestimmen */
$nowQuery = "SELECT press, to_char(timestamp, 'DD.MM.YYYY HH24:MI') as timestamp FROM ".$table['tabelle']." WHERE timestamp=(select max(timestamp) from ".$table['tabelle']." where sens_id=".$sensId.")";
$nowQuery = "SELECT press, to_char(timestamp, 'DD.MM.YYYY HH24:MI') as text_timestamp FROM ".$table['tabelle']." WHERE sens_id=".$sensId." ORDER BY timestamp DESC LIMIT 1";
$nowData = $connection->fetchQueryResultLine($nowQuery);
/* Max und Min-Werte bestimmen */
$maxQuery = "SELECT press, to_char(timestamp, 'DD.MM.YYYY HH24:MI') as timestamp FROM ".$table['tabelle']." WHERE sens_id=".$sensId." AND press=(SELECT max(press) FROM ".$table['tabelle']." WHERE sens_id=".$sensId.")";
$maxQuery = "SELECT press, to_char(timestamp, 'DD.MM.YYYY HH24:MI') as text_timestamp FROM ".$table['tabelle']." WHERE sens_id=".$sensId." AND press=(SELECT max(press) FROM ".$table['tabelle']." WHERE sens_id=".$sensId.") ORDER BY timestamp DESC LIMIT 1";
$maxData = $connection->fetchQueryResultLine($maxQuery);
$minQuery = "SELECT press, to_char(timestamp, 'DD.MM.YYYY HH24:MI') as timestamp FROM ".$table['tabelle']." WHERE sens_id=".$sensId." AND press=(SELECT min(press) FROM ".$table['tabelle']." WHERE sens_id=".$sensId.")";
$minQuery = "SELECT press, to_char(timestamp, 'DD.MM.YYYY HH24:MI') as text_timestamp FROM ".$table['tabelle']." WHERE sens_id=".$sensId." AND press=(SELECT min(press) FROM ".$table['tabelle']." WHERE sens_id=".$sensId.") ORDER BY timestamp DESC LIMIT 1";
$minData = $connection->fetchQueryResultLine($minQuery);
/* Bestimmte Werte den Klassenvariablen zuordnen */
$this->nowPress = $nowData['press'];
$this->nowDate = $nowData['timestamp'];
$this->nowDate = $nowData['text_timestamp'];
$this->maxPress = $maxData['press'];
$this->maxDate = $maxData['timestamp'];
$this->maxDate = $maxData['text_timestamp'];
$this->minPress = $minData['press'];
$this->minDate = $minData['timestamp'];
/* Durchschnittswert bestimmen lassen */
$this->_fetchAverage($sensId, $table['tabelle'], &$connection);
/* Tendenz bestimmen lassen */
$this->_fetchMoving($sensId, $table['tabelle'], &$connection);
$this->minDate = $minData['text_timestamp'];
}
/* liefert den Durchschnittswert in einem bestimmtem Interval */
function _getAverage($sensId, $table, &$connection, $interval){
$avQuery = "SELECT (sum(press)/count(press)) as average, count(press) as count FROM ".$table." WHERE sens_id=".$sensId." AND timestamp>(current_timestamp - INTERVAL '".$interval."')";
$avData = $connection->fetchQueryResultLine($avQuery);
function _getAverage($interval){
$avQuery = "SELECT avg(press) as average, count(press) as count FROM ".$this->table." WHERE sens_id=".$this->sensId." AND timestamp>(current_timestamp - INTERVAL '".$interval."')";
$avData = $this->connection->fetchQueryResultLine($avQuery);
return $avData;
}
/* momentanen Durchschnittswert bestimmen */
function _fetchAverage($sensId, $table, &$connection){
function _fetchAverage(){
$avData = array('average'=>0, 'count'=>0); /* Array initialisieren */
$i = 1; /* Laufvariable */
while($avData['count']<5){ /* Schleife prueft, in welchem Interval 5 Werte zusammenkommen */
$i++; /* Laufvariable erhoehen */
$avData = $this->_getAverage($sensId, $table, &$connection, ($i*20)." minutes"); /* Holt Werte mit gegebenem Interval */
$avData = $this->_getAverage(($i*(Config::getAvInterval()))." minutes"); /* Holt Werte mit gegebenem Interval */
}
/* Werte den Klassenvariablen zuordnen */
$this->avVal = $avData['average'];
$this->avInter = $i*20;
$this->avInter = $i*(Config::getAvInterval());
}
/* Bestimmt die Tendenz */
function _fetchMoving($sensId, $table, &$connection){
$shortAvData = $this->_getAverage($sensId, $table, &$connection, "15 minutes"); /* Durchschnitt der letzten 15 minuten */
$longAvData = $this->_getAverage($sensId, $table, &$connection, "120 minutes"); /* Durchschnitt der letzten 120 Minuten */
function _fetchMoving(){
$shortAvData = $this->_getAverage("15 minutes"); /* Durchschnitt der letzten 15 minuten */
$longAvData = $this->_getAverage("120 minutes"); /* Durchschnitt der letzten 120 Minuten */
if($shortAvData['count'] < 1 || $longAvData['count'] < 2){ /* Wenn in den letzten 5 minuten kein Wert kam oder in den letzten 120 min weniger als 3 Werte kamen */
$this->changing = "Berechnung momentan nicht moeglich"; /* Dann ausgeben, dass momentan nichts berechnet werden kann */
return; /* und aus der Funktion huepfen */
}
$changing = $shortAvData['average'] - $longAvData['average']; /* Aenderung berechnen */
if($changing > 0){ /* Wenn Aenderung positiv */
$this->changing = "steigend (+ ".abs($changing * 0.1)." hPa)"; /* dann steigende Tendenz ausgeben */
$this->changing = "steigend (+ ".abs(round($changing * 0.1, 1))." hPa)"; /* dann steigende Tendenz ausgeben */
} elseif($changing < 0) { /* wenn Negativ */
$this->changing = "fallend (- ".abs($changing * 0.1)." hPa)"; /* Fallende Tendenz ausgeben */
$this->changing = "fallend (- ".abs(round($changing * 0.1, 1))." hPa)"; /* Fallende Tendenz ausgeben */
} else { /* an sonsten */
$this->changing = "gleichbleibend (&plusmn; 0 hPa)"; /* sagen, das es gleich geblieben ist */
}
@@ -105,14 +105,20 @@ class Press{
}
function get_av_value(){
return $this->avVal;
if($this->avVal == "nc")
$this->_fetchAverage();
return round($this->avVal,1);
}
function get_av_interval(){
if($this->avInter == "nc")
$this->_fetchAverage();
return $this->avInter;
}
function get_changing(){
if($this->changing == "nc")
$this->_fetchMoving();
return $this->changing;
}