added apc and memcache Smarty support

bundled-libs/Smarty/libs/plugins/cacheresource.memcache.php

@@ -0,0 +1,91 @@
+<?php
+
+/**
+ * Memcache CacheResource for Smarty 3.1
+ *
+ * CacheResource Implementation based on the KeyValueStore API to use
+ * memcache as the storage resource for Smarty's output caching.
+ *
+ * Note that memcache has a limitation of 256 characters per cache-key.
+ * To avoid complications all cache-keys are translated to a sha1 hash.
+ *
+ * @package CacheResource-examples
+ * @author Rodney Rehm
+ */
+class Smarty_CacheResource_Memcache extends Smarty_CacheResource_KeyValueStore {
+    /**
+     * memcache instance
+     * @var Memcache
+     */
+    protected $memcache = null;
+
+    public function __construct()
+    {
+        $this->memcache = new Memcache();
+        $this->memcache->addServer( '127.0.0.1', 11211 );
+    }
+
+    /**
+     * Read values for a set of keys from cache
+     *
+     * @param array $keys list of keys to fetch
+     * @return array list of values with the given keys used as indexes
+     * @return boolean true on success, false on failure
+     */
+    protected function read(array $keys)
+    {
+        $_keys = $lookup = array();
+        foreach ($keys as $k) {
+            $_k = sha1($k);
+            $_keys[] = $_k;
+            $lookup[$_k] = $k;
+        }
+        $_res = array();
+        $res = $this->memcache->get($_keys);
+        foreach ($res as $k => $v) {
+            $_res[$lookup[$k]] = $v;
+        }
+        return $_res;
+    }
+
+    /**
+     * Save values for a set of keys to cache
+     *
+     * @param array $keys list of values to save
+     * @param int $expire expiration time
+     * @return boolean true on success, false on failure
+     */
+    protected function write(array $keys, $expire=null)
+    {
+        foreach ($keys as $k => $v) {
+            $k = sha1($k);
+            $this->memcache->set($k, $v, 0, $expire);
+        }
+        return true;
+    }
+
+    /**
+     * Remove values from cache
+     *
+     * @param array $keys list of keys to delete
+     * @return boolean true on success, false on failure
+     */
+    protected function delete(array $keys)
+    {
+        foreach ($keys as $k) {
+            $k = sha1($k);
+            $this->memcache->delete($k);
+        }
+        return true;
+    }
+
+    /**
+     * Remove *all* values from cache
+     *
+     * @return boolean true on success, false on failure
+     */
+    protected function purge()
+    {
+        return $this->memcache->flush();
+    }
+}

docs/NEWS

@@ -3,6 +3,14 @@
 
 Version 2.0-beta3 ()
 ------------------------------------------------------------------------
+
+    * added experimental support for PHP/SMARTY IN MEMORY caching
+      Enabled by default, if classes found loaded.
+      Disable with 
+        $serendipity['disable_apc'] = true;
+      and
+        $serendipity['disable_memcache'] = true;
+
     * Support added in serendipity_db_schema_import for sqlite 
       autoincrement
 

include/functions_smarty.inc.php

@@ -905,6 +905,10 @@ function serendipity_smarty_init($vars = array()) {
                 @define('SMARTY_RESOURCE_CHAR_SET', LANG_CHARSET);
             }
 
+            // define cache resources to load with smarty - see smarty class
+            @define('APC_EXTENSION_LOADED', extension_loaded('apc') && ini_get('apc.enabled'));
+            @define('MEMCACHE_EXTENSION_LOADED', class_exists('Memcache',false) && extension_loaded("memcached"));
+
             // Default Smarty Engine will be used
             @define('SMARTY_DIR', S9Y_PEAR_PATH . 'Smarty/libs/');
             if (!class_exists('Smarty')) {

include/serendipity_smarty_class.inc.php

@@ -168,8 +168,15 @@ class Serendipity_Smarty extends Smarty
         */
          
         // enable for APC in-memory (RAM) storage caching - must be enabled in PHP
-        #apc-cache# $this->addPluginsDir ( SMARTY_DIR . 'plugins/' );
-        #apc-cache# $this->caching_type = 'apc'; //$this->setCachingType ( 'apc' );
+        if(APC_EXTENSION_LOADED && !$serendipity['disable_apc']) {
+            $this->addPluginsDir ( SMARTY_DIR . 'plugins/' );
+            $this->caching_type = 'apc'; //$this->setCachingType ( 'apc' );
+        }
+        // enable for MEMCACHE storage caching - must be enabled in PHP
+        if(MEMCACHE_EXTENSION_LOADED && !$serendipity['disable_memcache']) {
+            $this->addPluginsDir ( SMARTY_DIR . 'plugins/' );
+            $this->caching_type = 'memcache'; //$this->setCachingType ( 'memcache' );
+        }
 
         /*
             Caching is disabled, as long as we haven't figured out on how to use it best here....