public function getShardInfo() { if (empty(self::$_virtShards)) { $vsconfig = (require _CONFIG_ . DIRECTORY_SEPARATOR . 'shard.php'); $this->_vsconfig = $vsconfig; $infokey = $vsconfig['infokey']; $info_uptime_key = $infokey . '_uptime'; $redis = Leb_Dao_Redis::getInstance($vsconfig['redis']); // TODO 远程读取redis缓存的速度,和$value的大小关系非常大。 // 所以还可以考虑把$value值压缩后存储,能从redis读取的时候快些。 // 存储在本地磁盘还是快些,可以考虑再加一层缓存, // 通过本地更新时间与redis更新时间确定是否需要拿数据库新值。 $vsinfos = array(); if (($gz_jvsdata = $redis->get($infokey)) !== false) { $jvsdata = gzuncompress($gz_jvsdata); if ($jvsdata === false) { $vsinfos = json_decode($gz_jvsdata, true); if ($vsinfos) { $redis->set($infokey, gzcompress($gz_jvsdata)); } else { $this->_error = 'Unknown shard info cache format, no json, no gzjson.'; } } else { $vsinfos = json_decode($jvsdata, true); } } else { $dbConfig = $vsconfig['database']; $dbh = Leb_Dao_Abstract::getInstance($dbConfig); if (!$dbh) { return false; } else { $sql = "SELECT * FROM `{$vsconfig['tablename']}` LIMIT 4096"; $vsrecords = $dbh->query($sql); if (!$vsrecords) { $dbh = null; return false; } else { foreach ($vsrecords as $idx => $record) { $vsinfos['byid'][$record['vsid']] = $record; $bynameKey = "{$record['shard_name']}_{$record['shard_value']}"; $vsinfos['byname'][$bynameKey][$record['vsid']] = $record; $vsinfos['uptime'] = time(); } $bret = $redis->set($infokey, gzcompress(json_encode($vsinfos))); $bret = $redis->set($info_uptime_key, $vsinfos['uptime']); } } } if (!empty($vsinfos)) { self::$_virtShards = $vsinfos; } } return self::$_virtShards; }
/** * 对保存到数据库的数据进行处理 * * @param mixed $data 要操作的数据 * @return boolean */ protected function _facade($data) { $this->_checkTableInfo(); $data = Leb_Dao_Abstract::facade($data, $this->_fields, self::$dbFieldtypeCheck); $this->_before_write($data); return $data; }