public function getBrokerCompanyInfo($company_id)
 {
     $key = Util_MemCacheKey::get_broker_company_info($company_id);
     APF::get_instance()->benchmark_begin(__CLASS__ . " getBrokerCompanyInfo_{$company_id}");
     $memcache = APF_Cache_Factory::get_instance()->get_memcache();
     $value = $memcache->get($key);
     if (!$value) {
         $time = Util_MemCacheTime::get_broker_company_info();
         $value = parent::getBrokerCompanyInfo($company_id);
         $memcache->add($key, $value, 0, $time);
     }
     APF::get_instance()->benchmark_end(__CLASS__ . " getBrokerCompanyInfo_{$company_id}");
     return $value;
 }