Added class for caching on file disk (moved from 1.6. branch)

git-svn-id: http://xe-core.googlecode.com/svn/branches/1.5.0@10561 201d5d3c-b55e-5fd7-737f-ddc643e51545

classes/cache/CacheFile.class.php

@@ -0,0 +1,69 @@
+<?php
+/**
+ * @class CacheFile
+ * @author Arnia Software (xe_dev@arnia.ro)
+ * @brief Filedisk Cache Handler
+ * @version 0.1
+ **/
+
+class CacheFile extends CacheBase {
+	var $valid_time = 36000;
+	var $cache_dir = 'files/cache/store/';
+	
+	function getInstance(){
+		if(!$GLOBALS['__CacheFile__']) {
+			$GLOBALS['__CacheFile__'] = new CacheFile();
+		}
+		return $GLOBALS['__CacheFile__'];
+	}
+
+	function CacheFile(){
+		$this->cache_dir = _XE_PATH_ . $this->cache_dir;
+		if(!is_dir($this->cache_dir)) FileHandler::makeDir($this->cache_dir);
+	}
+
+	private function getCacheFileName($key){
+		return $this->cache_dir . str_replace(':', '_', $key);
+	}
+	
+	function isSupport(){
+		return true;
+	}
+
+	function put($key, $obj, $valid_time = 0){
+		$cache_file = $this->getCacheFileName($key);		
+		$text = serialize($obj);
+		FileHandler::writeFile($cache_file, $text);
+	}
+
+	function isValid($key, $modified_time = 0) {
+		$cache_file = $this->getCacheFileName($key);
+		if(file_exists($cache_file)) return true;
+		
+		return false;
+	}
+
+	function get($key, $modified_time = 0) {
+		$cache_file = $this->getCacheFileName($key);
+		$content = FileHandler::readFile($cache_file);
+		if(!$content) return false;
+		
+		return unserialize($content);
+	}
+
+	function _delete($_key) {
+		$cache_file = $this->getCacheFileName($_key);
+		FileHandler::removeFile($cache_file);
+	}
+
+	function delete($key) {
+		$this->_delete($key);
+	}
+
+	function truncate() {
+		FileHandler::removeFilesInDir($this->cache_dir);
+	}
+}
+
+/* End of file CacheFile.class.php */
+/* Location: ./classes/cache/CacheFile.class.php */

classes/cache/CacheHandler.class.php

@@ -10,14 +10,15 @@ class CacheHandler extends Handler {
 	var $handler = null;
 	var $keyGroupVersions = null;
 
-	function &getInstance($target = 'object') {
+	function &getInstance($target = 'object', $info = null, $always_use_file = false) {
-		if(!$GLOBALS['__XE_CACHE_HANDLER__'][$target]) {
+		$cache_handler_key = $target . ($always_use_file ? '_file' : '');
-			$GLOBALS['__XE_CACHE_HANDLER__'][$target] = new CacheHandler($target);
+		if(!$GLOBALS['__XE_CACHE_HANDLER__'][$cache_handler_key]) {
+			$GLOBALS['__XE_CACHE_HANDLER__'][$cache_handler_key] = new CacheHandler($target, $info, $always_use_file);
 		}
-		return $GLOBALS['__XE_CACHE_HANDLER__'][$target];
+		return $GLOBALS['__XE_CACHE_HANDLER__'][$cache_handler_key];
 	}
 
-	function CacheHandler($target, $info = null) {
+	function CacheHandler($target, $info = null, $always_use_file = false) {
 		if(!$info) $info = Context::getDBInfo();
 		if($info){
 			if($target == 'object'){
@@ -26,6 +27,8 @@ class CacheHandler extends Handler {
 					$type = 'memcache';
 					$url = $info->use_object_cache;
 				} else if($info->use_object_cache == 'wincache') $type = 'wincache';
+				else if($info->use_object_cache =='file') $type = 'file';
+				else if($always_use_file) $type = 'file';
 			}else if($target == 'template'){
 				if($info->use_template_cache =='apc') $type = 'apc';
 				else if(substr($info->use_template_cache,0,8)=='memcache'){