本文整理匯總了PHP中core\Database::locKTables方法的典型用法代碼示例。如果您正苦於以下問題：PHP Database::locKTables方法的具體用法？PHP Database::locKTables怎麽用？PHP Database::locKTables使用的例子？那麽, 這裏精選的方法代碼示例或許可以為您提供幫助。您也可以進一步了解該方法所在類core\Database的用法示例。
在下文中一共展示了Database::locKTables方法的1個代碼示例，這些例子默認根據受歡迎程度排序。您可以為喜歡或者感覺有用的代碼點讚，您的評價將有助於係統推薦出更棒的PHP代碼示例。
示例1: exit
// unset($pid);
// parent will die here
if (!$forked) {
exit(1);
}
// Avoid forking connection crash, renew the connection.
Database::disconnect();
// Get maximum allowed connections before table lock.
$capLimit = (int) @conf::get('system::crontab.process_limit');
if (!$capLimit) {
$capLimit = Process::MAXIMUM_CAPACITY;
}
// Start transaction before lock tables.
Database::beginTransaction();
// Pick next awaiting process
Database::locKTables([FRAMEWORK_COLLECTION_PROCESS . ' READ']);
$res = (int) Database::fetchField('SELECT IFNULL(SUM(`capacity`), 0) as occupation
FROM `' . FRAMEWORK_COLLECTION_PROCESS . '`
WHERE `pid` IS NOT NULL AND `pid` > 0');
Database::unlockTables(true);
if ($res >= $capLimit) {
Log::debug('Active processes has occupied maximum server capacity, daemon exits.');
Database::rollback();
die;
}
unset($res, $capLimit);
Database::lockTables(array(FRAMEWORK_COLLECTION_PROCESS . ' LOW_PRIORITY WRITE', FRAMEWORK_COLLECTION_PROCESS . ' as `active` LOW_PRIORITY WRITE', FRAMEWORK_COLLECTION_PROCESS . ' as `inactive` LOW_PRIORITY WRITE'));
$process = Database::fetchRow('SELECT `inactive`.* FROM `' . FRAMEWORK_COLLECTION_PROCESS . '` as `inactive`
LEFT JOIN ( SELECT `type`, SUM(`capacity`) as `occupation` FROM `' . FRAMEWORK_COLLECTION_PROCESS . '`
WHERE `pid` IS NOT NULL GROUP BY `type` ) as `active`
ON `active`.`type` = `inactive`.`type`