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Merge branch 'compound-keys-fix' into 1.0.x

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This commit is contained in:
Brion Vibber 2011-09-30 11:55:36 -07:00
commit 69e95bb9c8
3 changed files with 52 additions and 26 deletions
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34
classes/Managed_DataObject.php
View File

@ -168,4 +168,38 @@ abstract class Managed_DataObject extends Memcached_DataObject
}
return $links;
}
/**
* Return a list of all primary/unique keys / vals that will be used for
* caching. This will understand compound unique keys, which
* Memcached_DataObject doesn't have enough info to handle properly.
*
* @return array of strings
*/
function _allCacheKeys()
{
$table = call_user_func(array(get_class($this), 'schemaDef'));
$ckeys = array();
if (!empty($table['unique keys'])) {
$keyNames = $table['unique keys'];
foreach ($keyNames as $idx => $fields) {
$val = array();
foreach ($fields as $name) {
$val[$name] = self::valueString($this->$name);
}
$ckeys[] = self::multicacheKey($this->tableName(), $val);
}
}
if (!empty($table['primary key'])) {
$fields = $table['primary key'];
$val = array();
foreach ($fields as $name) {
$val[$name] = self::valueString($this->$name);
}
$ckeys[] = self::multicacheKey($this->tableName(), $val);
}
return $ckeys;
}
}

22
classes/User_im_prefs.php
View File

@ -80,26 +80,4 @@ class User_im_prefs extends Managed_DataObject
);
}
/**
* We have two compound keys with unique constraints:
* (transport, user_id) which is our primary key, and
* (transport, screenname) which is an additional constraint.
*
* Currently there's not a way to represent that second key
* in the general keys list, so we're adding it here to the
* list of keys to use for caching, ensuring that it gets
* cleared as well when we change.
*
* @return array of cache keys
*/
function _allCacheKeys()
{
$ukeys = 'transport,screenname';
$uvals = $this->transport . ',' . $this->screenname;
$ckeys = parent::_allCacheKeys();
$ckeys[] = $this->cacheKey($this->tableName(), $ukeys, $uvals);
return $ckeys;
}
}

18
lib/cache.php
View File

@ -43,11 +43,23 @@
*/
class Cache
{
/**
* @var array additional in-process cache for web requests;
* disabled on CLI, unsafe for long-running daemons
*/
var $_items = array();
var $_inlineCache = true;
static $_inst = null;
const COMPRESSED = 1;
private function __construct() {
// Potentially long-running daemons or maintenance scripts
// should not use an in-process cache as it becomes out of
// date.
$this->_inlineCache = (php_sapi_name() != 'cli');
}
/**
* Singleton constructor
*
@ -166,7 +178,7 @@ class Cache
common_perf_counter('Cache::get', $key);
if (Event::handle('StartCacheGet', array(&$key, &$value))) {
if (array_key_exists($key, $this->_items)) {
if ($this->_inlineCache && array_key_exists($key, $this->_items)) {
$value = unserialize($this->_items[$key]);
}
Event::handle('EndCacheGet', array($key, &$value));
@ -193,7 +205,9 @@ class Cache
if (Event::handle('StartCacheSet', array(&$key, &$value, &$flag,
&$expiry, &$success))) {
if ($this->_inlineCache) {
$this->_items[$key] = serialize($value);
}
$success = true;
@ -244,7 +258,7 @@ class Cache
common_perf_counter('Cache::delete', $key);
if (Event::handle('StartCacheDelete', array(&$key, &$success))) {
if (array_key_exists($key, $this->_items)) {
if ($this->_inlineCache && array_key_exists($key, $this->_items)) {
unset($this->_items[$key]);
}
$success = true;