protected function freeLocksOnServer($lockSrv, array $paths, $type)
{
$status = Status::newGood();
$server = $this->lockServers[$lockSrv];
$conn = $this->redisPool->getConnection($server);
if (!$conn) {
foreach ($paths as $path) {
$status->fatal('lockmanager-fail-releaselock', $path);
}
return $status;
}
$keys = array_map(array($this, 'recordKeyForPath'), $paths);
// lock records
try {
static $script = <<<LUA
\t\t\tif ARGV[1] ~= 'EX' and ARGV[1] ~= 'SH' then
\t\t\t\treturn redis.error_reply('Unrecognized lock type given (must be EX or SH)')
\t\t\tend
\t\t\tlocal failed = {}
\t\t\tfor i,resourceKey in ipairs(KEYS) do
\t\t\t\tlocal released = redis.call('hDel',resourceKey,ARGV[1] .. ':' .. ARGV[2])
\t\t\t\tif released > 0 then
\t\t\t\t\t-- Remove the whole structure if it is now empty
\t\t\t\t\tif redis.call('hLen',resourceKey) == 0 then
\t\t\t\t\t\tredis.call('del',resourceKey)
\t\t\t\t\tend
\t\t\t\telse
\t\t\t\t\tfailed[#failed+1] = resourceKey
\t\t\t\tend
\t\t\tend
\t\t\treturn failed
LUA;
$res = $conn->luaEval($script, array_merge($keys, array($type === self::LOCK_SH ? 'SH' : 'EX', $this->session)), count($keys));
} catch (RedisException $e) {
$res = false;
$this->redisPool->handleException($server, $conn, $e);
}
if ($res === false) {
foreach ($paths as $path) {
$status->fatal('lockmanager-fail-releaselock', $path);
}
} else {
$pathsByKey = array_combine($keys, $paths);
foreach ($res as $key) {
$status->fatal('lockmanager-fail-releaselock', $pathsByKey[$key]);
}
}
return $status;
}
/**
* The redis extension throws an exception in response to various read, write
* and protocol errors. Sometimes it also closes the connection, sometimes
* not. The safest response for us is to explicitly destroy the connection
* object and let it be reopened during the next request.
*/
protected function handleException( $server, RedisConnRef $conn, $e ) {
$this->redisPool->handleException( $server, $conn, $e );
}
/**
* @param $server string
* @param $conn RedisConnRef
* @param $e RedisException
* @throws MWException
*/
protected function throwRedisException($server, RedisConnRef $conn, $e)
{
$this->redisPool->handleException($server, $conn, $e);
throw new MWException("Redis server error: {$e->getMessage()}\n");
}
