晋太元中,武陵人捕鱼为业。缘溪行,忘路之远近。忽逢桃花林,夹岸数百步,中无杂树,芳草鲜美,落英缤纷。渔人甚异之,复前行,欲穷其林。 林尽水源,便得一山,山有小口,仿佛若有光。便舍船,从口入。初极狭,才通人。复行数十步,豁然开朗。土地平旷,屋舍俨然,有良田、美池、桑竹之属。阡陌交通,鸡犬相闻。其中往来种作,男女衣着,悉如外人。黄发垂髫,并怡然自乐。 见渔人,乃大惊,问所从来。具答之。便要还家,设酒杀鸡作食。村中闻有此人,咸来问讯。自云先世避秦时乱,率妻子邑人来此绝境,不复出焉,遂与外人间隔。问今是何世,乃不知有汉,无论魏晋。此人一一为具言所闻,皆叹惋。余人各复延至其家,皆出酒食。停数日,辞去。此中人语云:“不足为外人道也。”(间隔 一作:隔绝) 既出,得其船,便扶向路,处处志之。及郡下,诣太守,说如此。太守即遣人随其往,寻向所志,遂迷,不复得路。 南阳刘子骥,高尚士也,闻之,欣然规往。未果,寻病终。后遂无问津者。
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<?php
/*+***********************************************************************************
* The contents of this file are subject to the vtiger CRM Public License Version 1.0
* ("License"); You may not use this file except in compliance with the License
* The Original Code is: vtiger CRM Open Source
* The Initial Developer of the Original Code is vtiger.
* Portions created by vtiger are Copyright (C) vtiger.
* All Rights Reserved.
*************************************************************************************/
include_once dirname(__FILE__) . '/Connectors.php';
class Vtiger_Cache_Connector {
protected $connection;
protected function __construct() {
if (!$this->connection) {
$this->connection = Vtiger_Cache_Connector_Memory::getInstance();
}
}
protected function cacheKey($ns, $key) {
if(is_array($key)) $key = implode('-', $key);
return $ns . '-' . $key;
}
public function set($namespace, $key, $value) {
$this->connection->set($this->cacheKey($namespace, $key), $value);
}
public function get($namespace, $key) {
return $this->connection->get($this->cacheKey($namespace, $key));
}
public function delete($namespace, $key) {
$this->connection->delete($this->cacheKey($namespace, $key));
}
public function has($namespace, $key) {
return $this->get($namespace, $key) !== false;
}
public function flush(){
$this->connection->flush();
$time = time()+1; //one second future
while(time() < $time) {
//sleep
}
}
public static function getInstance() {
static $singleton = NULL;
if ($singleton === NULL) {
$singleton = new self();
}
return $singleton;
}
}