public static function processLock($singleton = false)
{
$processName = md5(basename($_SERVER['SCRIPT_FILENAME']));
$serverName = php_uname('n');
$key = 'process_lock_' . $processName;
if ($singleton === true && GlobalCache::exists($key) !== false) {
exit;
}
if (APPLICATION_ENV != Environment::LOCAL) {
$maxTime = 10;
sleep(rand(0, $maxTime));
$processName = md5(basename($_SERVER['SCRIPT_FILENAME']));
$serverName = php_uname('n');
$key = 'process_lock_' . $processName;
GlobalCache::set($key, $serverName);
sleep($maxTime + 5);
$winner = GlobalCache::get($key);
if ($winner !== $serverName) {
exit;
}
}
}
