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Added preload caching

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This commit is contained in:
Deon George
2011-06-01 19:30:22 +10:00
parent d7822a03e8
commit 35426141e5
3 changed files with 65 additions and 6 deletions
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56
application/classes/ormtsm.php
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@@ -25,6 +25,60 @@ class ORMTSM extends ORM {
protected $_formated = FALSE;
protected $_formats = array();
public function find() {
// Check if we can preload our data and havent already done it
if ($time = $this->isCacheable() AND is_null(Cache::instance()->get($cache_key = 'PRELOAD:'.$this->_table_name))) {
// Firstly set our cache, so that we dont get in a loop
Cache::instance()->set($cache_key,TRUE,$time-1);
// Find all records of this type
$c = get_class($this);
$x = new $c;
foreach ($x->find_all() as $record) {
// Simulate loading the record so that we can get the SQL to use as our cache key
$y = new $c;
$y->where($y->_primary_key,'=',(string)$record);
// Code, as extracted from ORM to complete building the SQL
$y->_build(Database::SELECT);
$y->_db_builder->from($y->_table_name);
if (! isset($y->_db_applied['order_by']) AND ! empty($y->_sorting))
foreach ($y->_sorting as $column => $direction) {
if (strpos($column, '.') === FALSE)
// Sorting column for use in JOINs
$column = ($y->_disable_join_table_name ? '' : $y->_table_name.'.').$column;
$y->_db_builder->order_by($column, $direction);
}
// Set the cache key based on the database instance name and SQL
$cache_key = 'Database::query("'.$y->_db.'", "'.(string)$y->_db_builder.'")';
unset($y);
// Cache the record, our subsequent find should get a cache hit now.
Kohana::cache($cache_key, array($record->as_array()), $time);
}
unset($x);
}
// Contiue as normal
return parent::find();
}
private function isCacheable() {
$preload = array('NODES','VOLUMES');
$config = Kohana::config('database')->{Database::$default};
if ($config['caching'] AND isset($config['cachepreload'][$this->_table_name]) AND count($this->_db_pending) == 1 AND $this->_db_pending[0]['name'] == 'where' AND $this->_db_pending[0]['args'][0] == $this->_primary_key AND $this->_db_pending[0]['args'][1] == '=')
return $config['cachepreload'][$this->_table_name];
else
return FALSE;
}
protected function _load_result($multiple = FALSE) {
// We'll cache our query results
if ($c = $this->_db->caching($this->_table_name))
@@ -46,7 +100,7 @@ class ORMTSM extends ORM {
// Set the cache key based on the database instance name and SQL
$cache_key = 'Database::query(LC:'.$this->_table_name.')';
if ($result = Cache::instance()->get($cache_key))
if (! is_null($result = Cache::instance()->get($cache_key)))
// Return a cached result
return $result;
}