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🔒DB lock v0.4 #685 + 🔔userNotifications

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jokob-sk
2024-06-01 20:05:15 +10:00
parent 2e9aa37cd2
commit de561e1ad0
29 changed files with 1932 additions and 1460 deletions
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54
front/php/server/dbHelper.php
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@@ -48,6 +48,10 @@
$id = $_REQUEST['id'];
}
if (isset ($_REQUEST['delay'])) {
$delay = $_REQUEST['delay'];
}
if (isset ($_REQUEST['values'])) {
$values = $_REQUEST['values'];
}
@@ -72,7 +76,7 @@
case 'read' : read($rawSql); break;
case 'update': update($columnName, $id, $defaultValue, $expireMinutes, $dbtable, $columns, $values); break;
case 'delete': delete($columnName, $id, $dbtable); break;
case 'checkLock': checkLock(); break;
case 'lockDatabase': lockDatabase($delay); break;
default: logServerConsole ('Action: '. $action); break;
}
}
@@ -264,49 +268,11 @@ function delete($columnName, $id, $dbtable)
}
//------------------------------------------------------------------------------
// check if the database is locked
//------------------------------------------------------------------------------
function checkLock() {
return checkLock_file() or checkLock_db();
}
function checkLock_db() {
global $DBFILE, $db_locked;
$file = fopen($DBFILE, 'r+');
if (!$file or $db_locked) {
// Could not open the file
return 1;
}
if (flock($file, LOCK_EX | LOCK_NB)) {
// Lock acquired, meaning the database is not locked by another process
flock($file, LOCK_UN); // Release the lock
return 0; // Not locked
} else {
// Could not acquire lock, meaning the database is locked
fclose($file);
return 1; // Locked
}
}
function checkLock_file() {
$DBFILE_LOCKED_FILE = dirname(__FILE__).'/../../../logs/db_is_locked.log';
if (file_exists($DBFILE_LOCKED_FILE)) {
$status = file_get_contents($DBFILE_LOCKED_FILE);
return $status; // Output the content of the lock file (0 or 1)
} else {
return '0'; // If the file doesn't exist, consider it as unlocked
}
exit;
// Simulate database locking by starting a transaction
function lockDatabase($delay) {
$db = new SQLite3($GLOBALS['DBFILE']);
$db->exec('BEGIN EXCLUSIVE;');
sleep($delay); // Sleep for N seconds to simulate long-running transaction
}
?>