From c1cb9059ee60ae1bf1fd20afcf399b5616c8e740 Mon Sep 17 00:00:00 2001
From: Florian Pritz <bluewind@xssn.at>
Date: Sat, 14 Aug 2010 18:08:03 +0200
Subject: use memcache

Signed-off-by: Florian Pritz <bluewind@xssn.at>
---
 system/application/config/example/memcache.php   |   9 ++
 system/application/libraries/MemcacheLibrary.php | 182 +++++++++++++++++++++++
 system/application/models/file_mod.php           |  22 ++-
 3 files changed, 210 insertions(+), 3 deletions(-)
 create mode 100644 system/application/config/example/memcache.php
 create mode 100644 system/application/libraries/MemcacheLibrary.php

diff --git a/system/application/config/example/memcache.php b/system/application/config/example/memcache.php
new file mode 100644
index 000000000..a5bc7e3a8
--- /dev/null
+++ b/system/application/config/example/memcache.php
@@ -0,0 +1,9 @@
+<?php
+
+// this file is a config example for the codeigniter-memcache library
+// add this file to the your application's config directory
+$config["MEMCACHE_HOST"] = '127.0.0.1';
+$config["MEMCACHE_PORT"]   = 11211;
+
+
+?>
diff --git a/system/application/libraries/MemcacheLibrary.php b/system/application/libraries/MemcacheLibrary.php
new file mode 100644
index 000000000..046a6f599
--- /dev/null
+++ b/system/application/libraries/MemcacheLibrary.php
@@ -0,0 +1,182 @@
+<?php
+
+/**
+* codeigniter-memcache v0.1
+*
+* codeigniter-memcache is a codeigniter library to work with memcached easily.
+*
+*
+* @file MemcacheLibrary.php
+* @copyright 2010 egnity - egnity.com
+* @author Emre Yilmaz <mail@emreyilmaz.me>
+* @license GNU General Public License
+* @version 0.1
+*/
+
+
+class MemcacheLibrary {
+
+    /**
+    * variable that holds memcached backend instance
+    *
+    * @var object
+    * @access public
+    */
+    public $memcachedInstance;
+    
+    /**
+    * variable that holds servers for the memcache
+    *
+    * @var array
+    * @access public
+    */
+    public $servers = array();
+    
+    
+    /**
+    * main CodeIgniter instance
+    *
+    * @var object
+    * @access public
+    */
+    public $CI;
+
+    /**
+    * constructor function for the library
+    */
+    public function __construct() {
+        
+        /* initialize memcached instance */
+        if(class_exists("Memcache")) {
+            $this->memcachedInstance = new Memcache();
+        } else {
+            throw new Exception(
+                    "Memcached client doesn't exists in your PHP configuration"
+                );
+        }
+
+        /* load super CI instance */
+        $this->CI =& get_instance();
+        
+        /* load default server info */
+        $this->CI->config->load("memcache");
+
+        /* connect to default server */
+        if($this->CI->config->item("MEMCACHE_HOST") && $this->CI->config->item("MEMCACHE_PORT")) {
+            $this->addServer($this->CI->config->item("MEMCACHE_HOST"), $this->CI->config->item("MEMCACHE_PORT"));
+        }
+
+    }
+    
+    /**
+    * adder function for the memcache servers
+    *
+    * @access public
+    * @return void
+    */ 
+    public function addServer($server, $port) {
+        $this->servers[] = array(
+            "server" => $server,
+            "port"   => $port,
+        );
+        
+        $this->memcachedInstance->addServer($server, $port);
+    }
+
+    /**
+    * gets related key from the memcache
+    *
+    * @access public
+    */ 
+    public function get($key) {
+        $this->logDebugMessage(sprintf("%s key requested from memcache", $key));
+        return $this->memcachedInstance->get($key);
+    }
+    
+    /**
+    * sets related key to the memcache
+    *
+    * @access public
+    */   
+    public function set($key, $value, $expire = null) {
+        $this->logDebugMessage(
+                sprintf("%s key set to memcache. (expire: %s)",$key, $expire)
+            );
+        return $this->memcachedInstance->set($key, $value, null, $expire);
+    }
+
+    /**
+    * deletes related key from the memcache
+    *
+    * @access public
+    */ 
+    public function delete($key) {
+        $this->logDebugMessage(sprintf("%s key deleted from memcache.", $key));
+        return $this->memcachedInstance->delete($key);
+    }
+
+    /**
+    * increments related key from the memcache
+    *
+    * @access public
+    */ 
+    public function increment($key, $offset = 1) {
+        $this->logDebugMessage(sprintf("%s key incremented %s times", $key, $offset));
+        return $this->memcachedInstance->increment($key,  $offset);
+    }
+
+    /**
+    * decrements related key from the memcache
+    *
+    * @access public
+    */ 
+    public function decrement($key, $offset = 1) {
+        $this->logDebugMessage(sprintf("%s key decremented %s times", $key, $offset));
+        return $this->memcachedInstance->decrement($key,  $offset);
+    }
+        
+    /**
+    * gets running memcached servers.
+    *
+    * @access public
+    * @return array
+    */ 
+    public function getRunningServers() {
+        return $this->servers;
+    }
+
+    /**
+    * array of server statistics, one entry per server. 
+    *
+    * @access public
+    * @return array
+    */ 
+    public function getStatistics() {
+        return $this->memcachedInstance->getStats();
+    }
+
+    /**
+    * Invalidates all items from the memcache.
+    *
+    * @access public
+    * @return boolean
+    */ 
+    public function flush($delay = 0) {
+        $this->logDebugMessage(sprintf("memcache flushed! (delay: %s)", $delay));
+        return $this->memcachedInstance->flush($delay);
+    }
+
+    /**
+    * logs the memcache actions to the codeigniter's main logging system.
+    *
+    * @access private
+    */ 
+    private function logDebugMessage($message) {
+        log_message("debug", $message);
+    }
+}
+
+
+
+
+?>
diff --git a/system/application/models/file_mod.php b/system/application/models/file_mod.php
index 8c197546c..07c3e5555 100644
--- a/system/application/models/file_mod.php
+++ b/system/application/models/file_mod.php
@@ -182,8 +182,16 @@ class File_mod extends Model {
           }
           echo $this->load->view('file/html_header', $data, true);
           if ($mode == "rmd") {
-            echo '<td class="markdownrender">'."\n";
-            passthru('/usr/bin/perl /usr/bin/perlbin/vendor/Markdown.pl '.escapeshellarg($file));
+            $this->load->library("MemcacheLibrary");
+            if (! $cached = $this->memcachelibrary->get($filedata['hash'].'_'.$mode)) {
+              ob_start();
+              echo '<td class="markdownrender">'."\n";
+              passthru('/usr/bin/perl /usr/bin/perlbin/vendor/Markdown.pl '.escapeshellarg($file));
+                $cached = ob_get_contents();
+                ob_end_clean();
+                $this->memcachelibrary->set($filedata['hash'].'_'.$mode, $cached, 100);
+            }
+            echo $cached;
           } else {
             echo '<td class="numbers"><pre>';
             // only rewrite if it's fast
@@ -197,7 +205,15 @@ class File_mod extends Model {
               }
               fclose($fp);
             } else {
-              passthru('/usr/bin/pygmentize -l '.$mode.' -f html '.escapeshellarg($file));
+              $this->load->library("MemcacheLibrary");
+              if (! $cached = $this->memcachelibrary->get($filedata['hash'].'_'.$mode)) {
+                ob_start();
+                passthru('/usr/bin/pygmentize -l '.$mode.' -f html '.escapeshellarg($file));
+                $cached = ob_get_contents();
+                ob_end_clean();
+                $this->memcachelibrary->set($filedata['hash'].'_'.$mode, $cached, 100);
+              }
+              echo $cached;
             }
             echo '</pre>';
           }
-- 
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