phprs\Invoker::__invoke PHP Method

    public function __invoke($request, &$response)
    {
        $args = array();
        //绑定参数和返回值
        $this->bind['param']->bind($request, $response, $args);
        $this->bind['return']->bind($request, $response, $args);
        //利用参数绑定的能力，提取@cache注释的信息
        $cache_ttl = 0;
        $cache_check = null;
        $cache_res = new Response(array('ttl' => function ($param) use(&$cache_ttl) {
            $cache_ttl = $param;
        }, 'check' => function ($param) use(&$cache_check) {
            $cache_check = $param;
        }, 'body' => function ($_ = null) {
        }));
        $this->bind['cache']->bind($request, $cache_res, $args);
        $use_cache = !$this->bind['cache']->isEmpty();
        $given = count($args);
        if ($given === 0) {
            $required_num = 0;
        } else {
            ksort($args, SORT_NUMERIC);
            end($args);
            $required_num = key($args) + 1;
        }
        Verify::isTrue($given === $required_num, new BadRequest("{$this->ins->class}::{$this->method_name} {$required_num} params required, {$given} given"));
        // 变量没给全
        $cache_key = null;
        if ($use_cache) {
            //输入参数包括函数参数和类注入数据两部分
            //所以以这些参数的摘要作为缓存的key
            $injected = $this->ins->getInjected();
            $cache_res->flush();
            //取出cache参数
            $cache_key = "invoke_{$this->ins->class}_{$this->method_name}_" . sha1(serialize($args) . serialize($injected) . $cache_ttl);
            $succeeded = false;
            $data = $this->checkAbleCache->get($cache_key, $succeeded);
            if ($succeeded && is_array($data)) {
                $response->setBuffer($data);
                $response->flush();
                Logger::info("{$this->ins->class}::{$this->method_name} get response from cache {$cache_key}");
                return;
            }
        }
        $impl = $this->ins->getImpl($request);
        //
        if (!$this->bind['throws']->isEmpty()) {
            try {
                $res = call_user_func_array(array($impl, $this->method_name), $args);
            } catch (\Exception $e) {
                $response->clear();
                // 清除之前绑定的变量, 异常发生时可能已经写入了一些参数
                $this->bind['throws']->bind($request, $response, $e);
                $response['break'][][0] = true;
                $response->flush();
                return;
            }
        } else {
            $res = call_user_func_array(array($impl, $this->method_name), $args);
        }
        $this->bind['return']->setReturn($res);
        if ($use_cache) {
            $this->checkAbleCache->set($cache_key, $response->getBuffer(), $cache_ttl, $cache_check);
            Logger::info("{$this->ins->class}::{$this->method_name} set response to cache {$cache_key}, ttl={$cache_ttl}, check=" . ($cache_check === null ? 'null' : get_class($cache_check)));
        }
        $response->flush();
    }