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Differences Between: [Versions 310 and 311] [Versions 310 and 400] [Versions 310 and 401] [Versions 310 and 402] [Versions 310 and 403]

   1  <?php
   2  
   3  // security - hide paths
   4  if (!defined('ADODB_DIR')) die();
   5  
   6  global $ADODB_INCLUDED_MEMCACHE;
   7  $ADODB_INCLUDED_MEMCACHE = 1;
   8  
   9  global $ADODB_INCLUDED_CSV;
  10  if (empty($ADODB_INCLUDED_CSV)) include_once (ADODB_DIR.'/adodb-csvlib.inc.php');
  11  
  12  /*
  13  
  14    @version   v5.20.16  12-Jan-2020
  15    @copyright (c) 2000-2013 John Lim (jlim#natsoft.com). All rights reserved.
  16    @copyright (c) 2014      Damien Regad, Mark Newnham and the ADOdb community
  17    Released under both BSD license and Lesser GPL library license.
  18    Whenever there is any discrepancy between the two licenses,
  19    the BSD license will take precedence. See License.txt.
  20    Set tabs to 4 for best viewing.
  21  
  22    Latest version is available at http://adodb.org/
  23  
  24  Usage:
  25  
  26  $db = NewADOConnection($driver);
  27  $db->memCache = true; /// should we use memCache instead of caching in files
  28  $db->memCacheHost = array($ip1, $ip2, $ip3);
  29  $db->memCachePort = 11211; /// this is default memCache port
  30  $db->memCacheCompress = false; /// Use 'true' to store the item compressed (uses zlib)
  31  
  32  $db->Connect(...);
  33  $db->CacheExecute($sql);
  34  
  35    Note the memcache class is shared by all connections, is created during the first call to Connect/PConnect.
  36  
  37    Class instance is stored in $ADODB_CACHE
  38  */
  39  
  40  	 class ADODB_Cache_MemCache {
  41  	 	 var $createdir = false; // create caching directory structure?
  42  
  43  	 	 //-----------------------------
  44  	 	 // memcache specific variables
  45  
  46  	 	 var $hosts;	 // array of hosts
  47  	 	 var $port = 11211;
  48  	 	 var $compress = false; // memcache compression with zlib
  49  
  50  	 	 var $_connected = false;
  51  	 	 var $_memcache = false;
  52  
  53  		function __construct(&$obj)
  54  	 	 {
  55  	 	 	 $this->hosts = $obj->memCacheHost;
  56  	 	 	 $this->port = $obj->memCachePort;
  57  	 	 	 $this->compress = $obj->memCacheCompress;
  58  	 	 }
  59  
  60  	 	 // implement as lazy connection. The connection only occurs on CacheExecute call
  61  		function connect(&$err)
  62  	 	 {
  63  	 	 	 if (!function_exists('memcache_pconnect')) {
  64  	 	 	 	 $err = 'Memcache module PECL extension not found!';
  65  	 	 	 	 return false;
  66  	 	 	 }
  67  
  68  	 	 	 $memcache = new MemCache;
  69  
  70  	 	 	 if (!is_array($this->hosts)) $this->hosts = array($this->hosts);
  71  
  72  	 	 	 $failcnt = 0;
  73  	 	 	 foreach($this->hosts as $host) {
  74  	 	 	 	 if (!@$memcache->addServer($host,$this->port,true)) {
  75  	 	 	 	 	 $failcnt += 1;
  76  	 	 	 	 }
  77  	 	 	 }
  78  	 	 	 if ($failcnt == sizeof($this->hosts)) {
  79  	 	 	 	 $err = 'Can\'t connect to any memcache server';
  80  	 	 	 	 return false;
  81  	 	 	 }
  82  	 	 	 $this->_connected = true;
  83  	 	 	 $this->_memcache = $memcache;
  84  	 	 	 return true;
  85  	 	 }
  86  
  87  	 	 // returns true or false. true if successful save
  88  		function writecache($filename, $contents, $debug, $secs2cache)
  89  	 	 {
  90  	 	 	 if (!$this->_connected) {
  91  	 	 	 	 $err = '';
  92  	 	 	 	 if (!$this->connect($err) && $debug) ADOConnection::outp($err);
  93  	 	 	 }
  94  	 	 	 if (!$this->_memcache) return false;
  95  
  96  	 	 	 if (!$this->_memcache->set($filename, $contents, $this->compress ? MEMCACHE_COMPRESSED : 0, $secs2cache)) {
  97  	 	 	 	 if ($debug) ADOConnection::outp(" Failed to save data at the memcached server!<br>\n");
  98  	 	 	 	 return false;
  99  	 	 	 }
 100  
 101  	 	 	 return true;
 102  	 	 }
 103  
 104  	 	 // returns a recordset
 105  		function readcache($filename, &$err, $secs2cache, $rsClass)
 106  	 	 {
 107  	 	 	 $false = false;
 108  	 	 	 if (!$this->_connected) $this->connect($err);
 109  	 	 	 if (!$this->_memcache) return $false;
 110  
 111  	 	 	 $rs = $this->_memcache->get($filename);
 112  	 	 	 if (!$rs) {
 113  	 	 	 	 $err = 'Item with such key doesn\'t exists on the memcached server.';
 114  	 	 	 	 return $false;
 115  	 	 	 }
 116  
 117  	 	 	 // hack, should actually use _csv2rs
 118  	 	 	 $rs = explode("\n", $rs);
 119              unset($rs[0]);
 120              $rs = join("\n", $rs);
 121   	 	 	 $rs = unserialize($rs);
 122  	 	 	 if (! is_object($rs)) {
 123  	 	 	 	 $err = 'Unable to unserialize $rs';
 124  	 	 	 	 return $false;
 125  	 	 	 }
 126  	 	 	 if ($rs->timeCreated == 0) return $rs; // apparently have been reports that timeCreated was set to 0 somewhere
 127  
 128  	 	 	 $tdiff = intval($rs->timeCreated+$secs2cache - time());
 129  	 	 	 if ($tdiff <= 2) {
 130  	 	 	 	 switch($tdiff) {
 131  	 	 	 	 	 case 2:
 132  	 	 	 	 	 	 if ((rand() & 15) == 0) {
 133  	 	 	 	 	 	 	 $err = "Timeout 2";
 134  	 	 	 	 	 	 	 return $false;
 135  	 	 	 	 	 	 }
 136  	 	 	 	 	 	 break;
 137  	 	 	 	 	 case 1:
 138  	 	 	 	 	 	 if ((rand() & 3) == 0) {
 139  	 	 	 	 	 	 	 $err = "Timeout 1";
 140  	 	 	 	 	 	 	 return $false;
 141  	 	 	 	 	 	 }
 142  	 	 	 	 	 	 break;
 143  	 	 	 	 	 default:
 144  	 	 	 	 	 	 $err = "Timeout 0";
 145  	 	 	 	 	 	 return $false;
 146  	 	 	 	 }
 147  	 	 	 }
 148  	 	 	 return $rs;
 149  	 	 }
 150  
 151  		function flushall($debug=false)
 152  	 	 {
 153  	 	 	 if (!$this->_connected) {
 154  	 	 	 	 $err = '';
 155  	 	 	 	 if (!$this->connect($err) && $debug) ADOConnection::outp($err);
 156  	 	 	 }
 157  	 	 	 if (!$this->_memcache) return false;
 158  
 159  	 	 	 $del = $this->_memcache->flush();
 160  
 161  	 	 	 if ($debug)
 162  	 	 	 	 if (!$del) ADOConnection::outp("flushall: failed!<br>\n");
 163  	 	 	 	 else ADOConnection::outp("flushall: succeeded!<br>\n");
 164  
 165  	 	 	 return $del;
 166  	 	 }
 167  
 168  		function flushcache($filename, $debug=false)
 169  	 	 {
 170  	 	 	 if (!$this->_connected) {
 171    	 	 	 	 $err = '';
 172    	 	 	 	 if (!$this->connect($err) && $debug) ADOConnection::outp($err);
 173  	 	 	 }
 174  	 	 	 if (!$this->_memcache) return false;
 175  
 176  	 	 	 $del = $this->_memcache->delete($filename);
 177  
 178  	 	 	 if ($debug)
 179  	 	 	 	 if (!$del) ADOConnection::outp("flushcache: $key entry doesn't exist on memcached server!<br>\n");
 180  	 	 	 	 else ADOConnection::outp("flushcache: $key entry flushed from memcached server!<br>\n");
 181  
 182  	 	 	 return $del;
 183  	 	 }
 184  
 185  	 	 // not used for memcache
 186  		function createdir($dir, $hash)
 187  	 	 {
 188  	 	 	 return true;
 189  	 	 }
 190  	 }