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;
}
/**
* 构造函数
*
* @param string $name 模型名称
* @param array $dbConfig 数据库配置
*/
public function __construct($name = __CLASS__, $dbConfig = '')
{
// 模型初始化
$this->_initialize();
// 获取模型名称
$this->_name = $name;
//使用默认配置
if (empty($dbConfig)) {
$dbConfig = (require _CONFIG_ . 'db.php');
}
$this->_dao = Leb_Dao_Abstract::getInstance($dbConfig);
if (isset($dbConfig['debug'])) {
self::$debug = $dbConfig['debug'];
$this->_dao->setDaoType($this->_daoType);
$this->_dao->debug = $dbConfig['debug'];
}
//表单令牌验证
defined('_TOKEN_ON_') && (self::$tokenOn = _TOKEN_ON_);
defined('_TOKEN_NAME_') && (self::$tokenName = _TOKEN_NAME_);
isset($dbConfig['dbFieldtypeCheck']) && (self::$dbFieldtypeCheck = $dbConfig['dbFieldtypeCheck']);
// 设置表前缀
$modelName = get_class($this);
$refc = new ReflectionClass($modelName);
$tpprop = $refc->getProperty('_tablePrefix');
$decl = $tpprop->getDeclaringClass();
if ($tpprop->class != $modelName) {
$this->_tablePrefix = $this->_tablePrefix ? $this->_tablePrefix : @$dbConfig['tablePrefix'];
$this->_tableSuffix = $this->_tableSuffix ? $this->_tableSuffix : @$dbConfig['tableSuffix'];
}
//初始化数据库名
if ('' == $this->_dbName) {
if (isset($dbConfig[self::DB_CFG_MASTER][self::DB_CFG_DBNAME])) {
$this->_dbName = $dbConfig[self::DB_CFG_MASTER][self::DB_CFG_DBNAME];
} else {
isset($dbConfig[self::DB_CFG_DBNAME]) && ($this->_dbName = $dbConfig[self::DB_CFG_DBNAME]);
}
}
$this->_dbConfig = $dbConfig;
unset($dbConfig);
// lazyed check table
if (!empty($this->_tableName) && $this->_autoCheckFields) {
// $this->_checkTableInfo();
}
}
