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DbSimple2:

 - added Cache_Lite support

git-svn-id: svn://dklab.ru/lib/DbSimple/trunk@166 78bb956b-1e24-0410-b8d0-c528fdc9eae3
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commit d52a026ecdae81c5966222e747234a8637b53b9a 1 parent 6fff428
tit authored
View
40 lib/DbSimple/Generic.php
@@ -115,6 +115,26 @@ function& connect($dsn)
$object->setIdentPrefix($parsed['ident_prefix']);
}
$object->setCachePrefix(md5(serialize($parsed['dsn'])));
+ if (@fopen('Cache/Lite.php', 'r', true)) {
+ $tmp_dirs = array(
+ ini_get('session.save_path'),
+ '/tmp'
+ );
+ foreach($tmp_dirs as $dir) {
+ $fp = @fopen($dir.'/t', 'w');
+ if (is_resource($fp)) {
+
+ require_once 'Cache/Lite.php';
+ $t = new Cache_Lite(array('cacheDir' => $dir.'/', 'lifeTime' => null, 'automaticSerialization' => true));
+ $object->setCacher(&$t);
+
+ break;
+ }
+
+ }
+ fclose($fp);
+ unlink($dir.'/t');
+ }
return $object;
}
@@ -501,10 +521,10 @@ function _query($query, &$total)
if ($total) {
$this->_transformQuery($query, 'CALC_TOTAL');
}
-
+ $is_cacher_callable = (is_callable($this->_cacher) || (method_exists($this->_cacher, 'get') && method_exists($this->_cacher, 'save')));
$rows = null;
$cache_it = false;
- if (!empty($this->attributes['CACHE']) && is_callable($this->_cacher)) {
+ if (!empty($this->attributes['CACHE']) && $is_cacher_callable) {
$hash = $this->_cachePrefix . md5(serialize($query));
// Getting data from cache if possible
@@ -556,9 +576,9 @@ function _query($query, &$total)
if ($ttl && $uniq_key == $invalCache) {
$this->_logQuery($query);
$this->_logQueryStat($queryTime, $fetchTime, $firstFetchTime, $rows);
+
}
else $cache_it = true;
-
}
if (null === $rows || true === $cache_it) {
@@ -604,7 +624,7 @@ function _query($query, &$total)
$result = $this->_transformResult($rows);
// Storing data in cache
- if ($cache_it && is_callable($this->_cacher)) {
+ if ($cache_it && $is_cacher_callable) {
$this->_cache(
$hash,
array(
@@ -1059,13 +1079,19 @@ function _logQueryStat($queryTime, $fetchTime, $firstFetchTime, $rows)
}
/**
- * mixed _cache($hash, $result=null, $ttl=null)
+ * mixed _cache($hash, $result=null)
* Calls cache mechanism if possible.
*/
- function _cache($hash, $result=null, $ttl=null)
+ function _cache($hash, $result=null)
{
if (is_callable($this->_cacher))
- return call_user_func($this->_cacher, $hash, $result, $ttl);
+ return call_user_func($this->_cacher, $hash, $result);
+ else if (is_object($this->_cacher) && method_exists($this->_cacher, 'get') && method_exists($this->_cacher, 'save')) {
+ if (null === $result)
+ return $this->_cacher->get($hash);
+ else
+ $this->_cacher->save($result, $hash);
+ }
else return false;
}
View
824 t/Cache/Lite.php
@@ -0,0 +1,824 @@
+<?php
+
+/**
+* Fast, light and safe Cache Class
+*
+* Cache_Lite is a fast, light and safe cache system. It's optimized
+* for file containers. It is fast and safe (because it uses file
+* locking and/or anti-corruption tests).
+*
+* There are some examples in the 'docs/examples' file
+* Technical choices are described in the 'docs/technical' file
+*
+* Memory Caching is from an original idea of
+* Mike BENOIT <ipso@snappymail.ca>
+*
+* Nota : A chinese documentation (thanks to RainX <china_1982@163.com>) is
+* available at :
+* http://rainx.phpmore.com/manual/cache_lite.html
+*
+* @package Cache_Lite
+* @category Caching
+* @version $Id: Lite.php,v 1.45 2006/06/03 08:10:33 fab Exp $
+* @author Fabien MARTY <fab@php.net>
+*/
+
+define('CACHE_LITE_ERROR_RETURN', 1);
+define('CACHE_LITE_ERROR_DIE', 8);
+
+class Cache_Lite
+{
+
+ // --- Private properties ---
+
+ /**
+ * Directory where to put the cache files
+ * (make sure to add a trailing slash)
+ *
+ * @var string $_cacheDir
+ */
+ var $_cacheDir = '/tmp/';
+
+ /**
+ * Enable / disable caching
+ *
+ * (can be very usefull for the debug of cached scripts)
+ *
+ * @var boolean $_caching
+ */
+ var $_caching = true;
+
+ /**
+ * Cache lifetime (in seconds)
+ *
+ * If null, the cache is valid forever.
+ *
+ * @var int $_lifeTime
+ */
+ var $_lifeTime = 3600;
+
+ /**
+ * Enable / disable fileLocking
+ *
+ * (can avoid cache corruption under bad circumstances)
+ *
+ * @var boolean $_fileLocking
+ */
+ var $_fileLocking = true;
+
+ /**
+ * Timestamp of the last valid cache
+ *
+ * @var int $_refreshTime
+ */
+ var $_refreshTime;
+
+ /**
+ * File name (with path)
+ *
+ * @var string $_file
+ */
+ var $_file;
+
+ /**
+ * File name (without path)
+ *
+ * @var string $_fileName
+ */
+ var $_fileName;
+
+ /**
+ * Enable / disable write control (the cache is read just after writing to detect corrupt entries)
+ *
+ * Enable write control will lightly slow the cache writing but not the cache reading
+ * Write control can detect some corrupt cache files but maybe it's not a perfect control
+ *
+ * @var boolean $_writeControl
+ */
+ var $_writeControl = true;
+
+ /**
+ * Enable / disable read control
+ *
+ * If enabled, a control key is embeded in cache file and this key is compared with the one
+ * calculated after the reading.
+ *
+ * @var boolean $_writeControl
+ */
+ var $_readControl = true;
+
+ /**
+ * Type of read control (only if read control is enabled)
+ *
+ * Available values are :
+ * 'md5' for a md5 hash control (best but slowest)
+ * 'crc32' for a crc32 hash control (lightly less safe but faster, better choice)
+ * 'strlen' for a length only test (fastest)
+ *
+ * @var boolean $_readControlType
+ */
+ var $_readControlType = 'crc32';
+
+ /**
+ * Pear error mode (when raiseError is called)
+ *
+ * (see PEAR doc)
+ *
+ * @see setToDebug()
+ * @var int $_pearErrorMode
+ */
+ var $_pearErrorMode = CACHE_LITE_ERROR_RETURN;
+
+ /**
+ * Current cache id
+ *
+ * @var string $_id
+ */
+ var $_id;
+
+ /**
+ * Current cache group
+ *
+ * @var string $_group
+ */
+ var $_group;
+
+ /**
+ * Enable / Disable "Memory Caching"
+ *
+ * NB : There is no lifetime for memory caching !
+ *
+ * @var boolean $_memoryCaching
+ */
+ var $_memoryCaching = false;
+
+ /**
+ * Enable / Disable "Only Memory Caching"
+ * (be carefull, memory caching is "beta quality")
+ *
+ * @var boolean $_onlyMemoryCaching
+ */
+ var $_onlyMemoryCaching = false;
+
+ /**
+ * Memory caching array
+ *
+ * @var array $_memoryCachingArray
+ */
+ var $_memoryCachingArray = array();
+
+ /**
+ * Memory caching counter
+ *
+ * @var int $memoryCachingCounter
+ */
+ var $_memoryCachingCounter = 0;
+
+ /**
+ * Memory caching limit
+ *
+ * @var int $memoryCachingLimit
+ */
+ var $_memoryCachingLimit = 1000;
+
+ /**
+ * File Name protection
+ *
+ * if set to true, you can use any cache id or group name
+ * if set to false, it can be faster but cache ids and group names
+ * will be used directly in cache file names so be carefull with
+ * special characters...
+ *
+ * @var boolean $fileNameProtection
+ */
+ var $_fileNameProtection = true;
+
+ /**
+ * Enable / disable automatic serialization
+ *
+ * it can be used to save directly datas which aren't strings
+ * (but it's slower)
+ *
+ * @var boolean $_serialize
+ */
+ var $_automaticSerialization = false;
+
+ /**
+ * Disable / Tune the automatic cleaning process
+ *
+ * The automatic cleaning process destroy too old (for the given life time)
+ * cache files when a new cache file is written.
+ * 0 => no automatic cache cleaning
+ * 1 => systematic cache cleaning
+ * x (integer) > 1 => automatic cleaning randomly 1 times on x cache write
+ *
+ * @var int $_automaticCleaning
+ */
+ var $_automaticCleaningFactor = 0;
+
+ /**
+ * Nested directory level
+ *
+ * Set the hashed directory structure level. 0 means "no hashed directory
+ * structure", 1 means "one level of directory", 2 means "two levels"...
+ * This option can speed up Cache_Lite only when you have many thousands of
+ * cache file. Only specific benchs can help you to choose the perfect value
+ * for you. Maybe, 1 or 2 is a good start.
+ *
+ * @var int $_hashedDirectoryLevel
+ */
+ var $_hashedDirectoryLevel = 0;
+
+ /**
+ * Umask for hashed directory structure
+ *
+ * @var int $_hashedDirectoryUmask
+ */
+ var $_hashedDirectoryUmask = 0700;
+
+ /**
+ * API break for error handling in CACHE_LITE_ERROR_RETURN mode
+ *
+ * In CACHE_LITE_ERROR_RETURN mode, error handling was not good because
+ * for example save() method always returned a boolean (a PEAR_Error object
+ * would be better in CACHE_LITE_ERROR_RETURN mode). To correct this without
+ * breaking the API, this option (false by default) can change this handling.
+ *
+ * @var boolean
+ */
+ var $_errorHandlingAPIBreak = false;
+
+ // --- Public methods ---
+
+ /**
+ * Constructor
+ *
+ * $options is an assoc. Available options are :
+ * $options = array(
+ * 'cacheDir' => directory where to put the cache files (string),
+ * 'caching' => enable / disable caching (boolean),
+ * 'lifeTime' => cache lifetime in seconds (int),
+ * 'fileLocking' => enable / disable fileLocking (boolean),
+ * 'writeControl' => enable / disable write control (boolean),
+ * 'readControl' => enable / disable read control (boolean),
+ * 'readControlType' => type of read control 'crc32', 'md5', 'strlen' (string),
+ * 'pearErrorMode' => pear error mode (when raiseError is called) (cf PEAR doc) (int),
+ * 'memoryCaching' => enable / disable memory caching (boolean),
+ * 'onlyMemoryCaching' => enable / disable only memory caching (boolean),
+ * 'memoryCachingLimit' => max nbr of records to store into memory caching (int),
+ * 'fileNameProtection' => enable / disable automatic file name protection (boolean),
+ * 'automaticSerialization' => enable / disable automatic serialization (boolean),
+ * 'automaticCleaningFactor' => distable / tune automatic cleaning process (int),
+ * 'hashedDirectoryLevel' => level of the hashed directory system (int),
+ * 'hashedDirectoryUmask' => umask for hashed directory structure (int),
+ * 'errorHandlingAPIBreak' => API break for better error handling ? (boolean)
+ * );
+ *
+ * @param array $options options
+ * @access public
+ */
+ function Cache_Lite($options = array(NULL))
+ {
+ foreach($options as $key => $value) {
+ $this->setOption($key, $value);
+ }
+ }
+
+ /**
+ * Generic way to set a Cache_Lite option
+ *
+ * see Cache_Lite constructor for available options
+ *
+ * @var string $name name of the option
+ * @var mixed $value value of the option
+ * @access public
+ */
+ function setOption($name, $value)
+ {
+ $availableOptions = array('errorHandlingAPIBreak', 'hashedDirectoryUmask', 'hashedDirectoryLevel', 'automaticCleaningFactor', 'automaticSerialization', 'fileNameProtection', 'memoryCaching', 'onlyMemoryCaching', 'memoryCachingLimit', 'cacheDir', 'caching', 'lifeTime', 'fileLocking', 'writeControl', 'readControl', 'readControlType', 'pearErrorMode');
+ if (in_array($name, $availableOptions)) {
+ $property = '_'.$name;
+ $this->$property = $value;
+ }
+ }
+
+ /**
+ * Test if a cache is available and (if yes) return it
+ *
+ * @param string $id cache id
+ * @param string $group name of the cache group
+ * @param boolean $doNotTestCacheValidity if set to true, the cache validity won't be tested
+ * @return string data of the cache (else : false)
+ * @access public
+ */
+ function get($id, $group = 'default', $doNotTestCacheValidity = false)
+ {
+ $this->_id = $id;
+ $this->_group = $group;
+ $data = false;
+ if ($this->_caching) {
+ $this->_setRefreshTime();
+ $this->_setFileName($id, $group);
+ clearstatcache();
+ if ($this->_memoryCaching) {
+ if (isset($this->_memoryCachingArray[$this->_file])) {
+ if ($this->_automaticSerialization) {
+ return unserialize($this->_memoryCachingArray[$this->_file]);
+ }
+ return $this->_memoryCachingArray[$this->_file];
+ }
+ if ($this->_onlyMemoryCaching) {
+ return false;
+ }
+ }
+ if (($doNotTestCacheValidity) || (is_null($this->_refreshTime))) {
+ if (file_exists($this->_file)) {
+ $data = $this->_read();
+ }
+ } else {
+ if ((file_exists($this->_file)) && (@filemtime($this->_file) > $this->_refreshTime)) {
+ $data = $this->_read();
+ }
+ }
+ if (($data) and ($this->_memoryCaching)) {
+ $this->_memoryCacheAdd($data);
+ }
+ if (($this->_automaticSerialization) and (is_string($data))) {
+ $data = unserialize($data);
+ }
+ return $data;
+ }
+ return false;
+ }
+
+ /**
+ * Save some data in a cache file
+ *
+ * @param string $data data to put in cache (can be another type than strings if automaticSerialization is on)
+ * @param string $id cache id
+ * @param string $group name of the cache group
+ * @return boolean true if no problem (else : false or a PEAR_Error object)
+ * @access public
+ */
+ function save($data, $id = NULL, $group = 'default')
+ {
+ if ($this->_caching) {
+ if ($this->_automaticSerialization) {
+ $data = serialize($data);
+ }
+ if (isset($id)) {
+ $this->_setFileName($id, $group);
+ }
+ if ($this->_memoryCaching) {
+ $this->_memoryCacheAdd($data);
+ if ($this->_onlyMemoryCaching) {
+ return true;
+ }
+ }
+ if ($this->_automaticCleaningFactor>0) {
+ $rand = rand(1, $this->_automaticCleaningFactor);
+ if ($rand==1) {
+ $this->clean(false, 'old');
+ }
+ }
+ if ($this->_writeControl) {
+ $res = $this->_writeAndControl($data);
+ if (is_bool($res)) {
+ if ($res) {
+ return true;
+ }
+ // if $res if false, we need to invalidate the cache
+ @touch($this->_file, time() - 2*abs($this->_lifeTime));
+ return false;
+ }
+ } else {
+ $res = $this->_write($data);
+ }
+ if (is_object($res)) {
+ // $res is a PEAR_Error object
+ if (!($this->_errorHandlingAPIBreak)) {
+ return false; // we return false (old API)
+ }
+ }
+ return $res;
+ }
+ return false;
+ }
+
+ /**
+ * Remove a cache file
+ *
+ * @param string $id cache id
+ * @param string $group name of the cache group
+ * @return boolean true if no problem
+ * @access public
+ */
+ function remove($id, $group = 'default')
+ {
+ $this->_setFileName($id, $group);
+ if ($this->_memoryCaching) {
+ if (isset($this->_memoryCachingArray[$this->_file])) {
+ unset($this->_memoryCachingArray[$this->_file]);
+ $this->_memoryCachingCounter = $this->_memoryCachingCounter - 1;
+ }
+ if ($this->_onlyMemoryCaching) {
+ return true;
+ }
+ }
+ return $this->_unlink($this->_file);
+ }
+
+ /**
+ * Clean the cache
+ *
+ * if no group is specified all cache files will be destroyed
+ * else only cache files of the specified group will be destroyed
+ *
+ * @param string $group name of the cache group
+ * @param string $mode flush cache mode : 'old', 'ingroup', 'notingroup',
+ * 'callback_myFunction'
+ * @return boolean true if no problem
+ * @access public
+ */
+ function clean($group = false, $mode = 'ingroup')
+ {
+ return $this->_cleanDir($this->_cacheDir, $group, $mode);
+ }
+
+ /**
+ * Set to debug mode
+ *
+ * When an error is found, the script will stop and the message will be displayed
+ * (in debug mode only).
+ *
+ * @access public
+ */
+ function setToDebug()
+ {
+ $this->setOption('pearErrorMode', CACHE_LITE_ERROR_DIE);
+ }
+
+ /**
+ * Set a new life time
+ *
+ * @param int $newLifeTime new life time (in seconds)
+ * @access public
+ */
+ function setLifeTime($newLifeTime)
+ {
+ $this->_lifeTime = $newLifeTime;
+ $this->_setRefreshTime();
+ }
+
+ /**
+ * Save the state of the caching memory array into a cache file cache
+ *
+ * @param string $id cache id
+ * @param string $group name of the cache group
+ * @access public
+ */
+ function saveMemoryCachingState($id, $group = 'default')
+ {
+ if ($this->_caching) {
+ $array = array(
+ 'counter' => $this->_memoryCachingCounter,
+ 'array' => $this->_memoryCachingState
+ );
+ $data = serialize($array);
+ $this->save($data, $id, $group);
+ }
+ }
+
+ /**
+ * Load the state of the caching memory array from a given cache file cache
+ *
+ * @param string $id cache id
+ * @param string $group name of the cache group
+ * @param boolean $doNotTestCacheValidity if set to true, the cache validity won't be tested
+ * @access public
+ */
+ function getMemoryCachingState($id, $group = 'default', $doNotTestCacheValidity = false)
+ {
+ if ($this->_caching) {
+ if ($data = $this->get($id, $group, $doNotTestCacheValidity)) {
+ $array = unserialize($data);
+ $this->_memoryCachingCounter = $array['counter'];
+ $this->_memoryCachingArray = $array['array'];
+ }
+ }
+ }
+
+ /**
+ * Return the cache last modification time
+ *
+ * BE CAREFUL : THIS METHOD IS FOR HACKING ONLY !
+ *
+ * @return int last modification time
+ */
+ function lastModified()
+ {
+ return @filemtime($this->_file);
+ }
+
+ /**
+ * Trigger a PEAR error
+ *
+ * To improve performances, the PEAR.php file is included dynamically.
+ * The file is so included only when an error is triggered. So, in most
+ * cases, the file isn't included and perfs are much better.
+ *
+ * @param string $msg error message
+ * @param int $code error code
+ * @access public
+ */
+ function raiseError($msg, $code)
+ {
+ include_once('PEAR.php');
+ return PEAR::raiseError($msg, $code, $this->_pearErrorMode);
+ }
+
+ /**
+ * Extend the life of a valid cache file
+ *
+ * see http://pear.php.net/bugs/bug.php?id=6681
+ *
+ * @access public
+ */
+ function extendLife()
+ {
+ @touch($this->_file);
+ }
+
+ // --- Private methods ---
+
+ /**
+ * Compute & set the refresh time
+ *
+ * @access private
+ */
+ function _setRefreshTime()
+ {
+ if (is_null($this->_lifeTime)) {
+ $this->_refreshTime = null;
+ } else {
+ $this->_refreshTime = time() - $this->_lifeTime;
+ }
+ }
+
+ /**
+ * Remove a file
+ *
+ * @param string $file complete file path and name
+ * @return boolean true if no problem
+ * @access private
+ */
+ function _unlink($file)
+ {
+ if (!@unlink($file)) {
+ return $this->raiseError('Cache_Lite : Unable to remove cache !', -3);
+ }
+ return true;
+ }
+
+ /**
+ * Recursive function for cleaning cache file in the given directory
+ *
+ * @param string $dir directory complete path (with a trailing slash)
+ * @param string $group name of the cache group
+ * @param string $mode flush cache mode : 'old', 'ingroup', 'notingroup',
+ 'callback_myFunction'
+ * @return boolean true if no problem
+ * @access private
+ */
+ function _cleanDir($dir, $group = false, $mode = 'ingroup')
+ {
+ if ($this->_fileNameProtection) {
+ $motif = ($group) ? 'cache_'.md5($group).'_' : 'cache_';
+ } else {
+ $motif = ($group) ? 'cache_'.$group.'_' : 'cache_';
+ }
+ if ($this->_memoryCaching) {
+ while (list($key, ) = each($this->_memoryCachingArray)) {
+ if (strpos($key, $motif, 0)) {
+ unset($this->_memoryCachingArray[$key]);
+ $this->_memoryCachingCounter = $this->_memoryCachingCounter - 1;
+ }
+ }
+ if ($this->_onlyMemoryCaching) {
+ return true;
+ }
+ }
+ if (!($dh = opendir($dir))) {
+ return $this->raiseError('Cache_Lite : Unable to open cache directory !', -4);
+ }
+ $result = true;
+ while ($file = readdir($dh)) {
+ if (($file != '.') && ($file != '..')) {
+ if (substr($file, 0, 6)=='cache_') {
+ $file2 = $dir . $file;
+ if (is_file($file2)) {
+ switch (substr($mode, 0, 9)) {
+ case 'old':
+ // files older than lifeTime get deleted from cache
+ if (!is_null($this->_lifeTime)) {
+ if ((mktime() - @filemtime($file2)) > $this->_lifeTime) {
+ $result = ($result and ($this->_unlink($file2)));
+ }
+ }
+ break;
+ case 'notingrou':
+ if (!strpos($file2, $motif, 0)) {
+ $result = ($result and ($this->_unlink($file2)));
+ }
+ break;
+ case 'callback_':
+ $func = substr($mode, 9, strlen($mode) - 9);
+ if ($func($file2, $group)) {
+ $result = ($result and ($this->_unlink($file2)));
+ }
+ break;
+ case 'ingroup':
+ default:
+ if (strpos($file2, $motif, 0)) {
+ $result = ($result and ($this->_unlink($file2)));
+ }
+ break;
+ }
+ }
+ if ((is_dir($file2)) and ($this->_hashedDirectoryLevel>0)) {
+ $result = ($result and ($this->_cleanDir($file2 . '/', $group, $mode)));
+ }
+ }
+ }
+ }
+ return $result;
+ }
+
+ /**
+ * Add some date in the memory caching array
+ *
+ * @param string $data data to cache
+ * @access private
+ */
+ function _memoryCacheAdd($data)
+ {
+ $this->_memoryCachingArray[$this->_file] = $data;
+ if ($this->_memoryCachingCounter >= $this->_memoryCachingLimit) {
+ list($key, ) = each($this->_memoryCachingArray);
+ unset($this->_memoryCachingArray[$key]);
+ } else {
+ $this->_memoryCachingCounter = $this->_memoryCachingCounter + 1;
+ }
+ }
+
+ /**
+ * Make a file name (with path)
+ *
+ * @param string $id cache id
+ * @param string $group name of the group
+ * @access private
+ */
+ function _setFileName($id, $group)
+ {
+
+ if ($this->_fileNameProtection) {
+ $suffix = 'cache_'.md5($group).'_'.md5($id);
+ } else {
+ $suffix = 'cache_'.$group.'_'.$id;
+ }
+ $root = $this->_cacheDir;
+ if ($this->_hashedDirectoryLevel>0) {
+ $hash = md5($suffix);
+ for ($i=0 ; $i<$this->_hashedDirectoryLevel ; $i++) {
+ $root = $root . 'cache_' . substr($hash, 0, $i + 1) . '/';
+ }
+ }
+ $this->_fileName = $suffix;
+ $this->_file = $root.$suffix;
+ }
+
+ /**
+ * Read the cache file and return the content
+ *
+ * @return string content of the cache file (else : false or a PEAR_Error object)
+ * @access private
+ */
+ function _read()
+ {
+ $fp = @fopen($this->_file, "rb");
+ if ($this->_fileLocking) @flock($fp, LOCK_SH);
+ if ($fp) {
+ clearstatcache();
+ $length = @filesize($this->_file);
+ $mqr = get_magic_quotes_runtime();
+ set_magic_quotes_runtime(0);
+ if ($this->_readControl) {
+ $hashControl = @fread($fp, 32);
+ $length = $length - 32;
+ }
+ if ($length) {
+ $data = @fread($fp, $length);
+ } else {
+ $data = '';
+ }
+ set_magic_quotes_runtime($mqr);
+ if ($this->_fileLocking) @flock($fp, LOCK_UN);
+ @fclose($fp);
+ if ($this->_readControl) {
+ $hashData = $this->_hash($data, $this->_readControlType);
+ if ($hashData != $hashControl) {
+ if (!(is_null($this->_lifeTime))) {
+ @touch($this->_file, time() - 2*abs($this->_lifeTime));
+ } else {
+ @unlink($this->_file);
+ }
+ return false;
+ }
+ }
+ return $data;
+ }
+ return $this->raiseError('Cache_Lite : Unable to read cache !', -2);
+ }
+
+ /**
+ * Write the given data in the cache file
+ *
+ * @param string $data data to put in cache
+ * @return boolean true if ok (a PEAR_Error object else)
+ * @access private
+ */
+ function _write($data)
+ {
+ if ($this->_hashedDirectoryLevel > 0) {
+ $hash = md5($this->_fileName);
+ $root = $this->_cacheDir;
+ for ($i=0 ; $i<$this->_hashedDirectoryLevel ; $i++) {
+ $root = $root . 'cache_' . substr($hash, 0, $i + 1) . '/';
+ if (!(@is_dir($root))) {
+ @mkdir($root, $this->_hashedDirectoryUmask);
+ }
+ }
+ }
+ $fp = @fopen($this->_file, "wb");
+ if ($fp) {
+ if ($this->_fileLocking) @flock($fp, LOCK_EX);
+ if ($this->_readControl) {
+ @fwrite($fp, $this->_hash($data, $this->_readControlType), 32);
+ }
+ $len = strlen($data);
+ @fwrite($fp, $data, $len);
+ if ($this->_fileLocking) @flock($fp, LOCK_UN);
+ @fclose($fp);
+ return true;
+ }
+ return $this->raiseError('Cache_Lite : Unable to write cache file : '.$this->_file, -1);
+ }
+
+ /**
+ * Write the given data in the cache file and control it just after to avoir corrupted cache entries
+ *
+ * @param string $data data to put in cache
+ * @return boolean true if the test is ok (else : false or a PEAR_Error object)
+ * @access private
+ */
+ function _writeAndControl($data)
+ {
+ $result = $this->_write($data);
+ if (is_object($result)) {
+ return $result; # We return the PEAR_Error object
+ }
+ $dataRead = $this->_read();
+ if (is_object($dataRead)) {
+ return $result; # We return the PEAR_Error object
+ }
+ if ((is_bool($dataRead)) && (!$dataRead)) {
+ return false;
+ }
+ return ($dataRead==$data);
+ }
+
+ /**
+ * Make a control key with the string containing datas
+ *
+ * @param string $data data
+ * @param string $controlType type of control 'md5', 'crc32' or 'strlen'
+ * @return string control key
+ * @access private
+ */
+ function _hash($data, $controlType)
+ {
+ switch ($controlType) {
+ case 'md5':
+ return md5($data);
+ case 'crc32':
+ return sprintf('% 32d', crc32($data));
+ case 'strlen':
+ return sprintf('% 32d', strlen($data));
+ default:
+ return $this->raiseError('Unknown controlType ! (available values are only \'md5\', \'crc32\', \'strlen\')', -5);
+ }
+ }
+
+}
+
+?>
View
92 t/Cache/Lite/File.php
@@ -0,0 +1,92 @@
+<?php
+
+/**
+* This class extends Cache_Lite and offers a cache system driven by a master file
+*
+* With this class, cache validity is only dependent of a given file. Cache files
+* are valid only if they are older than the master file. It's a perfect way for
+* caching templates results (if the template file is newer than the cache, cache
+* must be rebuild...) or for config classes...
+* There are some examples in the 'docs/examples' file
+* Technical choices are described in the 'docs/technical' file
+*
+* @package Cache_Lite
+* @version $Id: File.php,v 1.3 2005/12/04 16:03:55 fab Exp $
+* @author Fabien MARTY <fab@php.net>
+*/
+
+require_once('Cache/Lite.php');
+
+class Cache_Lite_File extends Cache_Lite
+{
+
+ // --- Private properties ---
+
+ /**
+ * Complete path of the file used for controlling the cache lifetime
+ *
+ * @var string $_masterFile
+ */
+ var $_masterFile = '';
+
+ /**
+ * Masterfile mtime
+ *
+ * @var int $_masterFile_mtime
+ */
+ var $_masterFile_mtime = 0;
+
+ // --- Public methods ----
+
+ /**
+ * Constructor
+ *
+ * $options is an assoc. To have a look at availables options,
+ * see the constructor of the Cache_Lite class in 'Cache_Lite.php'
+ *
+ * Comparing to Cache_Lite constructor, there is another option :
+ * $options = array(
+ * (...) see Cache_Lite constructor
+ * 'masterFile' => complete path of the file used for controlling the cache lifetime(string)
+ * );
+ *
+ * @param array $options options
+ * @access public
+ */
+ function Cache_Lite_File($options = array(NULL))
+ {
+ $options['lifetime'] = 0;
+ $this->Cache_Lite($options);
+ if (isset($options['masterFile'])) {
+ $this->_masterFile = $options['masterFile'];
+ } else {
+ return $this->raiseError('Cache_Lite_File : masterFile option must be set !');
+ }
+ if (!($this->_masterFile_mtime = @filemtime($this->_masterFile))) {
+ return $this->raiseError('Cache_Lite_File : Unable to read masterFile : '.$this->_masterFile, -3);
+ }
+ }
+
+ /**
+ * Test if a cache is available and (if yes) return it
+ *
+ * @param string $id cache id
+ * @param string $group name of the cache group
+ * @return string data of the cache (or false if no cache available)
+ * @access public
+ */
+ function get($id, $group = 'default')
+ {
+ if ($data = parent::get($id, $group, true)) {
+ if ($filemtime = $this->lastModified()) {
+ if ($filemtime > $this->_masterFile_mtime) {
+ return $data;
+ }
+ }
+ }
+ return false;
+ }
+
+}
+
+?>
View
211 t/Cache/Lite/Function.php
@@ -0,0 +1,211 @@
+<?php
+
+/**
+* This class extends Cache_Lite and can be used to cache the result and output of functions/methods
+*
+* This class is completly inspired from Sebastian Bergmann's
+* PEAR/Cache_Function class. This is only an adaptation to
+* Cache_Lite
+*
+* There are some examples in the 'docs/examples' file
+* Technical choices are described in the 'docs/technical' file
+*
+* @package Cache_Lite
+* @version $Id: Function.php,v 1.10 2006/02/04 18:36:36 fab Exp $
+* @author Sebastian BERGMANN <sb@sebastian-bergmann.de>
+* @author Fabien MARTY <fab@php.net>
+*/
+
+require_once('Cache/Lite.php');
+
+class Cache_Lite_Function extends Cache_Lite
+{
+
+ // --- Private properties ---
+
+ /**
+ * Default cache group for function caching
+ *
+ * @var string $_defaultGroup
+ */
+ var $_defaultGroup = 'Cache_Lite_Function';
+
+ /**
+ * Don't cache the method call when its output contains the string "NOCACHE"
+ *
+ * if set to true, the output of the method will never be displayed (because the output is used
+ * to control the cache)
+ *
+ * @var boolean $_dontCacheWhenTheOutputContainsNOCACHE
+ */
+ var $_dontCacheWhenTheOutputContainsNOCACHE = false;
+
+ /**
+ * Don't cache the method call when its result is false
+ *
+ * @var boolean $_dontCacheWhenTheResultIsFalse
+ */
+ var $_dontCacheWhenTheResultIsFalse = false;
+
+ /**
+ * Don't cache the method call when its result is null
+ *
+ * @var boolean $_dontCacheWhenTheResultIsNull
+ */
+ var $_dontCacheWhenTheResultIsNull = false;
+
+ /**
+ * Debug the Cache_Lite_Function caching process
+ *
+ * @var boolean $_debugCacheLiteFunction
+ */
+ var $_debugCacheLiteFunction = false;
+
+ // --- Public methods ----
+
+ /**
+ * Constructor
+ *
+ * $options is an assoc. To have a look at availables options,
+ * see the constructor of the Cache_Lite class in 'Cache_Lite.php'
+ *
+ * Comparing to Cache_Lite constructor, there is another option :
+ * $options = array(
+ * (...) see Cache_Lite constructor
+ * 'debugCacheLiteFunction' => (bool) debug the caching process,
+ * 'defaultGroup' => default cache group for function caching (string),
+ * 'dontCacheWhenTheOutputContainsNOCACHE' => (bool) don't cache when the function output contains "NOCACHE",
+ * 'dontCacheWhenTheResultIsFalse' => (bool) don't cache when the function result is false,
+ * 'dontCacheWhenTheResultIsNull' => (bool don't cache when the function result is null
+ * );
+ *
+ * @param array $options options
+ * @access public
+ */
+ function Cache_Lite_Function($options = array(NULL))
+ {
+ $availableOptions = array('debugCacheLiteFunction', 'defaultGroup', 'dontCacheWhenTheOutputContainsNOCACHE', 'dontCacheWhenTheResultIsFalse', 'dontCacheWhenTheResultIsNull');
+ while (list($name, $value) = each($options)) {
+ if (in_array($name, $availableOptions)) {
+ $property = '_'.$name;
+ $this->$property = $value;
+ }
+ }
+ reset($options);
+ $this->Cache_Lite($options);
+ }
+
+ /**
+ * Calls a cacheable function or method (or not if there is already a cache for it)
+ *
+ * Arguments of this method are read with func_get_args. So it doesn't appear
+ * in the function definition. Synopsis :
+ * call('functionName', $arg1, $arg2, ...)
+ * (arg1, arg2... are arguments of 'functionName')
+ *
+ * @return mixed result of the function/method
+ * @access public
+ */
+ function call()
+ {
+ $arguments = func_get_args();
+ $id = $this->_makeId($arguments);
+ $data = $this->get($id, $this->_defaultGroup);
+ if ($data !== false) {
+ if ($this->_debugCacheLiteFunction) {
+ echo "Cache hit !\n";
+ }
+ $array = unserialize($data);
+ $output = $array['output'];
+ $result = $array['result'];
+ } else {
+ if ($this->_debugCacheLiteFunction) {
+ echo "Cache missed !\n";
+ }
+ ob_start();
+ ob_implicit_flush(false);
+ $target = array_shift($arguments);
+ if (is_array($target)) {
+ // in this case, $target is for example array($obj, 'method')
+ $object = $target[0];
+ $method = $target[1];
+ $result = call_user_func_array(array(&$object, $method), $arguments);
+ } else {
+ if (strstr($target, '::')) { // classname::staticMethod
+ list($class, $method) = explode('::', $target);
+ $result = call_user_func_array(array($class, $method), $arguments);
+ } else if (strstr($target, '->')) { // object->method
+ // use a stupid name ($objet_123456789 because) of problems where the object
+ // name is the same as this var name
+ list($object_123456789, $method) = explode('->', $target);
+ global $$object_123456789;
+ $result = call_user_func_array(array($$object_123456789, $method), $arguments);
+ } else { // function
+ $result = call_user_func_array($target, $arguments);
+ }
+ }
+ $output = ob_get_contents();
+ ob_end_clean();
+ if ($this->_dontCacheWhenTheResultIsFalse) {
+ if ((is_bool($result)) && (!($result))) {
+ echo($output);
+ return $result;
+ }
+ }
+ if ($this->_dontCacheWhenTheResultIsNull) {
+ if (is_null($result)) {
+ echo($output);
+ return $result;
+ }
+ }
+ if ($this->_dontCacheWhenTheOutputContainsNOCACHE) {
+ if (strpos($output, 'NOCACHE') > -1) {
+ return $result;
+ }
+ }
+ $array['output'] = $output;
+ $array['result'] = $result;
+ $this->save(serialize($array), $id, $this->_defaultGroup);
+ }
+ echo($output);
+ return $result;
+ }
+
+ /**
+ * Drop a cache file
+ *
+ * Arguments of this method are read with func_get_args. So it doesn't appear
+ * in the function definition. Synopsis :
+ * remove('functionName', $arg1, $arg2, ...)
+ * (arg1, arg2... are arguments of 'functionName')
+ *
+ * @return boolean true if no problem
+ * @access public
+ */
+ function drop()
+ {
+ $id = $this->_makeId(func_get_args());
+ $this->remove($id, $this->_defaultGroup);
+ }
+
+ /**
+ * Make an id for the cache
+ *
+ * @var array result of func_get_args for the call() or the remove() method
+ * @return string id
+ * @access private
+ */
+ function _makeId($arguments)
+ {
+ $id = serialize($arguments); // Generate a cache id
+ if (!$this->_fileNameProtection) {
+ $id = md5($id);
+ // if fileNameProtection is set to false, then the id has to be hashed
+ // because it's a very bad file name in most cases
+ }
+ return $id;
+ }
+
+}
+
+?>
View
72 t/Cache/Lite/Output.php
@@ -0,0 +1,72 @@
+<?php
+
+/**
+* This class extends Cache_Lite and uses output buffering to get the data to cache.
+*
+* There are some examples in the 'docs/examples' file
+* Technical choices are described in the 'docs/technical' file
+*
+* @package Cache_Lite
+* @version $Id: Output.php,v 1.4 2006/01/29 00:22:07 fab Exp $
+* @author Fabien MARTY <fab@php.net>
+*/
+
+require_once('Cache/Lite.php');
+
+class Cache_Lite_Output extends Cache_Lite
+{
+
+ // --- Public methods ---
+
+ /**
+ * Constructor
+ *
+ * $options is an assoc. To have a look at availables options,
+ * see the constructor of the Cache_Lite class in 'Cache_Lite.php'
+ *
+ * @param array $options options
+ * @access public
+ */
+ function Cache_Lite_Output($options)
+ {
+ $this->Cache_Lite($options);
+ }
+
+ /**
+ * Start the cache
+ *
+ * @param string $id cache id
+ * @param string $group name of the cache group
+ * @param boolean $doNotTestCacheValidity if set to true, the cache validity won't be tested
+ * @return boolean true if the cache is hit (false else)
+ * @access public
+ */
+ function start($id, $group = 'default', $doNotTestCacheValidity = false)
+ {
+ $data = $this->get($id, $group, $doNotTestCacheValidity);
+ if ($data !== false) {
+ echo($data);
+ return true;
+ }
+ ob_start();
+ ob_implicit_flush(false);
+ return false;
+ }
+
+ /**
+ * Stop the cache
+ *
+ * @access public
+ */
+ function end()
+ {
+ $data = ob_get_contents();
+ ob_end_clean();
+ $this->save($data, $this->_id, $this->_group);
+ echo($data);
+ }
+
+}
+
+
+?>
View
42 t/DbSimple/Generic/060_cache_lite.phpt
@@ -0,0 +1,42 @@
+--TEST--
+Generic: selectRow(); usage
+--FILE--
+<?php
+require_once dirname(__FILE__) . '/../init.php';
+
+function main(&$DB)
+{
+ $query = "
+ -- CACHE: 10
+ SELECT * FROM test
+ ";
+ @$DB->query("DROP TABLE test");
+ $DB->query("CREATE TABLE test(id INTEGER, str VARCHAR(1))");
+ $DB->query("INSERT INTO test(id, str) VALUES( 1, 'a')");
+ printr($DB->selectRow($query));
+ $DB->query("UPDATE test SET str='b' WHERE id=1");
+ printr($DB->selectRow($query));
+}
+
+?>
+--EXPECT--
+Query: 'DROP TABLE test'
+Query: 'CREATE TABLE test(id INTEGER, str VARCHAR(1))'
+Query: 'INSERT INTO test(id, str) VALUES( 1, \'a\')'
+Query: '
+ -- CACHE: 10
+ SELECT * FROM test
+ '
+array (
+ 'id' => '1',
+ 'str' => 'a',
+)
+Query: 'UPDATE test SET str=\'b\' WHERE id=1'
+Query: '
+ -- CACHE: 10
+ SELECT * FROM test
+ '
+array (
+ 'id' => '1',
+ 'str' => 'a',
+)
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