protected static function _get_server_lists(&$conf, &$zk_conf)
{
$conf_file = $conf['pid'] . '_conf_file';
$cached_conf_file = Ak_LocalCache::get($conf_file);
if ($conf != null && $conf === $cached_conf_file['raw_conf']) {
$conf = $cached_conf_file['validated_conf'];
} else {
$schema = self::_getSchema();
$raw_conf = $conf;
$conf = $schema->validate('mc_conf', $conf, $ret);
if ($ret != true) {
self::_warning("conf format error");
return null;
}
$cached_conf_file['raw_conf'] = $raw_conf;
$cached_conf_file['validated_conf'] = $conf;
Ak_LocalCache::set($conf_file, $cached_conf_file);
}
$pid = $conf['pid'];
$zk_path = $conf['zk_path'];
$zk_expire = $conf['zk_expire'];
$zk_global_path = "{$zk_path}/product";
$zk_global_conf = Ak_Zookeeper::getCached($zk_global_path, 0, $zk_expire, 'Ak_McClient::checkZkGlobalConf');
$zk_conf_path = "{$zk_path}/product/{$pid}";
$zk_conf = Ak_Zookeeper::getCached($zk_conf_path, 2, $zk_expire, 'Ak_McClient::checkZkConf');
if (!is_array($zk_conf)) {
return null;
}
$def_conf_items = array('connect_timeout', 'poll_timeout', 'send_timeout', 'recv_timeout');
foreach ($def_conf_items as $item) {
if (is_null($conf[$item])) {
$conf[$item] = is_null($zk_conf[$item]) ? $zk_global_conf[$item] : $zk_conf[$item];
}
}
$idc_type = $zk_conf['idc_type'];
$curr_idc = $conf['curr_idc'] - 1;
if ($idc_type == "none") {
$zk_conf['idc_num'] = 1;
$curr_idc = 0;
}
$idc_num = $zk_conf['idc_num'];
$server_lists = array();
for ($i = 0; $i < $idc_num; $i++) {
//$idc = $cur_mc_first ? ($i + $curr_idc) % $idc_num + 1 : $i + 1;
$idc = $i + 1;
$server_list = @$zk_conf['children']['server_list' . $idc];
if (!is_array($server_list)) {
self::_warning("server list[{$idc}] error");
return null;
}
$server_lists[] = $server_list;
}
return $server_lists;
}
public static function getCached($path, $depth = 0, $expire = 60, $user_def = null)
{
$zk_key = "Ak_Zookeeper." . $path . "." . $depth;
$zk_bak_key = $zk_key . ".bak";
if (!(self::$backup_dir === null)) {
AK_LocalCache::setDir(self::$backup_dir);
$zk_lock_dir = self::$backup_dir;
} else {
$zk_lock_dir = defined('IS_ODP') ? DATA_PATH . '/ak' : dirname(__FILE__) . '/var';
}
$res = Ak_LocalCache::get($zk_key);
if (is_array($res)) {
return $res;
}
if (!file_exists($zk_lock_dir)) {
mkdir($zk_lock_dir);
}
$zk_lock = $zk_lock_dir . '/zk_lock';
$fd = fopen($zk_lock, 'a+b');
if (!flock($fd, LOCK_EX)) {
Ak_Log::warning("zk lock failed");
fclose($fd);
return null;
}
$res = Ak_LocalCache::get($zk_key);
if (!is_array($res)) {
$bak = Ak_LocalCache::get($zk_bak_key);
if (!empty($bak) && is_array($bak)) {
Ak_LocalCache::set($zk_key, $bak, $expire);
} else {
$bak = null;
}
flock($fd, LOCK_UN);
if (self::$use_backup_only) {
$res = null;
} else {
// for null bak, add by cdz
if ($bak === null) {
Ak_Log::warning("local-cached file is empty, waiting to get from zk...");
$bak_zk_lock = $zk_lock_dir . '/' . 'bak_zk_lock';
$bak_fd = fopen($bak_zk_lock, 'a+b');
// non-block lock
if (!flock($bak_fd, LOCK_EX | LOCK_NB, $eWouldBlock) || $eWouldBlock) {
Ak_Log::warning("zk lock failed, path[{$path}], eWouldBlock[{$eWouldBlock}]");
fclose($bak_fd);
return null;
}
$res = Ak_LocalCache::get($zk_key);
if (!is_array($res)) {
$bak = Ak_LocalCache::get($zk_bak_key);
if (!empty($bak) && is_array($bak)) {
Ak_LocalCache::set($zk_key, $bak, $expire);
flock($bak_fd, LOCK_UN);
fclose($bak_fd);
} else {
$bak = null;
}
$res = self::get($path, $depth, self::$retry_times);
if (is_callable($user_def)) {
$res = call_user_func($user_def, $res);
}
}
} else {
// still need to get
$res = self::get($path, $depth, self::$retry_times);
if (is_callable($user_def)) {
$res = call_user_func($user_def, $res);
}
}
}
if (!empty($res) && is_array($res)) {
Ak_LocalCache::set($zk_bak_key, $res, -1);
Ak_LocalCache::set($zk_key, $res, $expire);
if ($bak === null) {
Ak_Log::warning("getting data from zk done, local-cached file created");
if (!self::$use_backup_only) {
flock($bak_fd, LOCK_UN);
fclose($bak_fd);
}
}
} else {
self::$zk = null;
if (empty($bak)) {
if (self::$use_backup_only) {
Ak_Log::warning("FATAL ERROR: zk is disabled and cached file is empty");
} else {
Ak_Log::warning("FATAL ERROR: get from zk failed and cached file is empty too, data[NULL]");
flock($bak_fd, LOCK_UN);
fclose($bak_fd);
}
fclose($fd);
return null;
}
if (!self::$use_backup_only) {
Ak_Log::warning("Using cached data[" . var_export($bak, true) . "] instead");
}
$res = $bak;
}
} else {
flock($fd, LOCK_UN);
}
fclose($fd);
return $res;
}