private static function initClientFactories()
{
self::tryRegisterClientFactory("http", "\\Hprose\\Swoole\\Http\\Client");
self::tryRegisterClientFactory("https", "\\Hprose\\Swoole\\Http\\Client");
self::tryRegisterClientFactory("tcp", "\\Hprose\\Swoole\\Socket\\Client");
self::tryRegisterClientFactory("tcp4", "\\Hprose\\Swoole\\Socket\\Client");
self::tryRegisterClientFactory("tcp6", "\\Hprose\\Swoole\\Socket\\Client");
self::tryRegisterClientFactory("ssl", "\\Hprose\\Swoole\\Socket\\Client");
self::tryRegisterClientFactory("sslv2", "\\Hprose\\Swoole\\Socket\\Client");
self::tryRegisterClientFactory("sslv3", "\\Hprose\\Swoole\\Socket\\Client");
self::tryRegisterClientFactory("tls", "\\Hprose\\Swoole\\Socket\\Client");
self::tryRegisterClientFactory("unix", "\\Hprose\\Swoole\\Socket\\Client");
self::tryRegisterClientFactory("ws", "\\Hprose\\Swoole\\WebSocket\\Client");
self::tryRegisterClientFactory("wss", "\\Hprose\\Swoole\\WebSocket\\Client");
self::$clientFactoriesInited = true;
}