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add busyTimeout() to deal with concurrency. open read-write only when needed

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This commit is contained in:
frederik
2024-03-04 14:03:54 +01:00
parent 90d53a3a43
commit b0eb5e063f
7 changed files with 60 additions and 175 deletions
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scripts/todays_detections.php
+10 -33
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@@ -10,6 +10,7 @@ session_set_cookie_params(7200);
session_start();
error_reporting(E_ERROR);
ini_set('display_errors',1);
require_once 'scripts/common.php';
if (file_exists('./scripts/thisrun.txt')) {
$config = parse_ini_file('./scripts/thisrun.txt');
@@ -28,57 +29,36 @@ if (file_exists('./scripts/thisrun.txt')) {
</div><div class=\"centered\"><h3>$site_name</h3></div><hr>";
}
$db = new SQLite3('./scripts/birds.db', SQLITE3_OPEN_CREATE | SQLITE3_OPEN_READWRITE);
if($db == False){
echo "Database is busy";
header("refresh: 0;");
}
$db = new SQLite3('./scripts/birds.db', SQLITE3_OPEN_READONLY);
$db->busyTimeout(1000);
$statement1 = $db->prepare('SELECT COUNT(*) FROM detections');
if($statement1 == False){
echo "Database is busy";
header("refresh: 0;");
}
ensure_db_ok($statement1);
$result1 = $statement1->execute();
$totalcount = $result1->fetchArray(SQLITE3_ASSOC);
$statement2 = $db->prepare('SELECT COUNT(*) FROM detections WHERE Date == DATE(\'now\', \'localtime\')');
if($statement2 == False){
echo "Database is busy";
header("refresh: 0;");
}
ensure_db_ok($statement2);
$result2 = $statement2->execute();
$todaycount = $result2->fetchArray(SQLITE3_ASSOC);
$statement3 = $db->prepare('SELECT COUNT(*) FROM detections WHERE Date == Date(\'now\', \'localtime\') AND TIME >= TIME(\'now\', \'localtime\', \'-1 hour\')');
if($statement3 == False){
echo "Database is busy";
header("refresh: 0;");
}
ensure_db_ok($statement3);
$result3 = $statement3->execute();
$hourcount = $result3->fetchArray(SQLITE3_ASSOC);
$statement4 = $db->prepare('SELECT Com_Name, Sci_Name, Time, Confidence FROM detections LIMIT 1');
if($statement4 == False){
echo "Database is busy";
header("refresh: 0;");
}
ensure_db_ok($statement4);
$result4 = $statement4->execute();
$mostrecent = $result4->fetchArray(SQLITE3_ASSOC);
$statement5 = $db->prepare('SELECT COUNT(DISTINCT(Com_Name)) FROM detections WHERE Date == Date(\'now\', \'localtime\')');
if($statement5 == False){
echo "Database is busy";
header("refresh: 0;");
}
ensure_db_ok($statement5);
$result5 = $statement5->execute();
$todayspeciestally = $result5->fetchArray(SQLITE3_ASSOC);
$statement6 = $db->prepare('SELECT COUNT(DISTINCT(Com_Name)) FROM detections');
if($statement6 == False){
echo "Database is busy";
header("refresh: 0;");
}
ensure_db_ok($statement6);
$result6 = $statement6->execute();
$totalspeciestally = $result6->fetchArray(SQLITE3_ASSOC);
@@ -205,10 +185,7 @@ if(isset($_GET['ajax_detections']) && $_GET['ajax_detections'] == "true" ) {
}
}
if($statement0 == False){
echo "Database is busy";
header("refresh: 0;");
}
ensure_db_ok($statement0);
$result0 = $statement0->execute();
?> <table>