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Add a method the memcached_object that lets it cache query results

This commit is contained in:
Evan Prodromou 2009-01-22 19:13:26 +01:00
parent e2869fcf0a
commit 8c79646e53
1 changed files with 39 additions and 10 deletions
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49
classes/Memcached_DataObject.php
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@ -21,7 +21,7 @@ if (!defined('LACONICA')) { exit(1); }
require_once INSTALLDIR.'/classes/Memcached_DataObject.php';
class Memcached_DataObject extends DB_DataObject
class Memcached_DataObject extends DB_DataObject
{
function &staticGet($cls, $k, $v=null)
{
@ -69,7 +69,7 @@ class Memcached_DataObject extends DB_DataObject
$result = parent::insert();
return $result;
}
function update($orig=null)
{
if (is_object($orig) && $orig instanceof Memcached_DataObject) {
@ -81,21 +81,21 @@ class Memcached_DataObject extends DB_DataObject
}
return $result;
}
function delete()
{
$this->decache(); # while we still have the values!
return parent::delete();
}
static function memcache() {
return common_memcache();
}
static function cacheKey($cls, $k, $v) {
return common_cache_key(strtolower($cls).':'.$k.':'.$v);
}
static function getcached($cls, $k, $v) {
$c = Memcached_DataObject::memcache();
if (!$c) {
@ -114,7 +114,7 @@ class Memcached_DataObject extends DB_DataObject
}
return $_DB_DATAOBJECT['INI'][$this->_database][$this->__table."__keys"];
}
function encache()
{
$c = $this->memcache();
@ -122,7 +122,7 @@ class Memcached_DataObject extends DB_DataObject
return false;
} else {
$pkey = array();
$pval = array();
$pval = array();
$types = $this->keyTypes();
ksort($types);
foreach ($types as $key => $type) {
@ -139,7 +139,7 @@ class Memcached_DataObject extends DB_DataObject
$c->set($this->cacheKey($this->tableName(), $pkeys, $pvals), $this);
}
}
function decache()
{
$c = $this->memcache();
@ -147,7 +147,7 @@ class Memcached_DataObject extends DB_DataObject
return false;
} else {
$pkey = array();
$pval = array();
$pval = array();
$types = $this->keyTypes();
ksort($types);
foreach ($types as $key => $type) {
@ -201,4 +201,33 @@ class Memcached_DataObject extends DB_DataObject
}
return $search_engine;
}
static function cachedQuery($cls, $qry, $expiry=3600)
{
$c = Memcached_DataObject::memcache();
if (!$c) {
$inst = new $cls();
$inst->query($qry);
return $cls;
}
$key_part = common_keyize($cls).':'.md5($qry);
$ckey = common_cache_key($key_part);
$stored = $c->get($ckey);
if ($stored) {
return new ArrayWrapper($stored);
}
$inst = new $cls();
$result = $inst->query($qry);
if (!$result) {
return $inst;
}
$cached = array();
while ($inst->fetch()) {
$cached[] = clone($inst);
}
$inst->free();
$c->set($ckey, $cached, MEMCACHE_COMPRESSED, $expiry);
return ArrayWrapper($cached);
}
}