KodExplorer/app/kod/FileCache.class.php

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<?php
/*
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* @link http://kodcloud.com/
* @author warlee | e-mail:kodcloud@qq.com
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* @copyright warlee 2014.(Shanghai)Co.,Ltd
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* @license http://kodcloud.com/tools/license/license.txt
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*/
/**
* 数据的缓存存储类key=>value 模式value可以是任意类型数据。
* 完整流程测试读取最低5000次/s 含有写的1000次/s
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* get($find=null)
* 1.get(); //返回所有
* 2.get(key); //直接通过key获取
* 3.get(data_key,value); //搜索key为value的数据 直接返回数据不含key
* 4.get(array('key','value')); //搜索数据符合key为指定value的所有数据;key value形式
*
* set($find=null,$change=null)
* 1.set(string,val) //添加或更新;
* 2.set(array('key','value_find'),array('key','change_to')) //查找方式更新 多条数据
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*
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* remove($find,$value)
* 1.remove(); //清空
* 2.remove(string); //删除 eg:set('37'),删除key为37的数据 存在且删除成功则返回true
* 3.remove(array('key','value_find')); //查找方式删除;多条数据
* reset($arr);//初始化数据
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*/
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define('CONFIG_EXIT', '<?php exit;?>');
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class FileCache{
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private $data;
private $file;
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private $fileHash;//最后一次修改;保存时判断,如果有新修改则先读取再保存
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function __construct($file) {
$this->file = $file;
$this->data= self::load($file);
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$this->fileChangeCheck();
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}
public function get($find=null,$value=null){
if (is_null($find)){
return $this->data;
}else if(is_array($find)){//查找内容数据方式获取;返回多条
$result = array();
foreach ($this->data as $key => $val) {
if ($val[$find[0]] == $find[1]) {
$result[$key] = $this->data[$key];
}
}
if(count($result)!=0){
return $result;
}
}else{//单条数据获取
$find .= '';//字符串
if(!is_null($value)){//通过某个key寻找单条数据
foreach ($this->data as $key => $val) {
if ($val[$find] == $value) {
return $val;
}
}
}
if(isset($this->data[$find])){
return $this->data[$find];
}
}
return false;
}
//添加或更新
public function set($find,$value){
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$this->fileChangeCheck();
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//最后有修改则先更新本地。
if(is_string($find)){//单条数据更新
$this->data[$find] = $value;
}else if(is_array($find)){//查找方式更新;更新多条
foreach ($this->data as $key => $val) {
if ($val[$find[0]] == $find[1]) {
$this->data[$key][$value[0]] = $value[1];
}
}
}else{
return false;
}
self::save($this->file,$this->data);
return true;
}
//删除,查找删除
public function remove($find){
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$this->fileChangeCheck();
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if(is_string($find)){//单条数据删除
unset($this->data[$find]);
}else if(is_array($find)){//查找删除
foreach ($this->data as $key => $val) {
if ($val[$find[0]] == $find[1]){
unset($this->data[$key]);
}
}
}else{
return false;
}
self::save($this->file,$this->data);
return true;
}
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private function fileChangeCheck(){
if(is_null($this->fileHash)){
$this->fileHash = @md5_file($this->file);
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return;
}
//是否发生改变
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$lastHash = @md5_file($this->file);
if($lastHash != $this->fileHash){
$this->fileHash = $lastHash;
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$this->data= self::load($this->file);
}
}
public function reset($data,$save = true){
$this->data = $data;
if($save){
self::save($this->file,$this->data);
}
}
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//=====================================================
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public static function arrSort(&$arr,$key, $type = 'asc'){
$keysValue = $newArray = array();
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foreach ($arr as $k => $v) {
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$keysValue[$k] = $v[$key];
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}
if ($type == 'asc') {
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asort($keysValue);
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} else {
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arsort($keysValue);
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}
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reset($keysValue);
foreach ($keysValue as $k => $v) {
$newArray[$k] = $arr[$k];
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}
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return $newArray;
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}
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public function getMaxId(){
$minId = 100;
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if(count($this->data)==0){
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return $minId;//一切从100开始
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}
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$idArr = array_keys($this->data);
rsort($idArr,SORT_NUMERIC);//id从高到底
$the_id = intval($idArr[0])+1;
if($the_id<=$minId){
return $minId;
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}
return $the_id;
}
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/**
* 加载数据;并解析成程序数据
*/
public static function load($file){//10000次需要4s 数据量差异不大。
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if (!$file) return false;
$file = iconv_system($file);
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$fileLock = $file.'.lock';
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if ( (!file_exists($file) || filesize($file) == 0 ) &&
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!file_exists($fileLock) ){//并发下;正在写或删除
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@file_put_contents($file,CONFIG_EXIT);
}
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$str = file_read_safe($file,10.4);
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if($str === false || strlen($str) == 0){
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//服务器崩溃下文件不存在异常恢复
if( (!file_exists($file) || filesize($file) == 0 ) &&
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file_exists($fileLock) &&
@filemtime($fileLock) > 1000 &&
time() - @filemtime($fileLock) > 10
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){
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@rename($fileLock,$file);
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}
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show_tips('[Error Code:1010] FileCache load error!'.$file);
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}
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$str = substr($str, strlen(CONFIG_EXIT));
$data= json_decode($str,true);
if (is_null($data)) $data = array();
return $data;
}
/**
* 保存数据;
*/
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public static function save($file,$data){//10000次需要6s
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if (!$file) return false;
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$file = iconv_system($file);
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if (!file_exists($file)){
@touch($file);
}
chmod_path($file,0777);
if (!path_writeable($file)) {
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show_tips(BASIC_PATH."<br/>".LNG('path_can_not_write_data'));
}
if(defined('JSON_PRETTY_PRINT')){
//$jsonStr = json_encode($data);
$jsonStr = json_encode($data,JSON_UNESCAPED_UNICODE|JSON_PRETTY_PRINT);
}else{
$jsonStr = json_encode($data);
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}
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if(is_null($jsonStr)){//含有二进制或非utf8字符串对应检测
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show_tips('json_encode error!');
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}
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$buffer = CONFIG_EXIT.$jsonStr;
return file_wirte_safe($file,$buffer,20.3);
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}
}