friendica/src/Core/Config/JitConfiguration.php
2019-07-15 08:58:37 +02:00

122 lines
2.7 KiB
PHP

<?php
namespace Friendica\Core\Config;
use Friendica\Model;
/**
* This class implements the Just-In-Time configuration, which will cache
* config values in a cache, once they are retrieved.
*
* Default Configuration type.
* Provides the best performance for pages loading few configuration variables.
*/
class JitConfiguration extends Configuration
{
/**
* @var array Array of already loaded db values (even if there was no value)
*/
private $db_loaded;
/**
* @param Cache\ConfigCache $configCache The configuration cache (based on the config-files)
* @param Model\Config\Config $configModel The configuration model
*/
public function __construct(Cache\ConfigCache $configCache, Model\Config\Config $configModel)
{
parent::__construct($configCache, $configModel);
$this->db_loaded = [];
$this->load();
}
/**
* {@inheritDoc}
*
*/
public function load(string $cat = 'config')
{
// If not connected, do nothing
if (!$this->configModel->isConnected()) {
return;
}
$config = $this->configModel->load($cat);
if (!empty($config[$cat])) {
foreach ($config[$cat] as $key => $value) {
$this->db_loaded[$cat][$key] = true;
}
}
// load the whole category out of the DB into the cache
$this->configCache->load($config, true);
}
/**
* {@inheritDoc}
*/
public function get(string $cat, string $key, $default_value = null, bool $refresh = false)
{
// if the value isn't loaded or refresh is needed, load it to the cache
if ($this->configModel->isConnected() &&
(empty($this->db_loaded[$cat][$key]) ||
$refresh)) {
$dbvalue = $this->configModel->get($cat, $key);
if (isset($dbvalue)) {
$this->configCache->set($cat, $key, $dbvalue);
unset($dbvalue);
}
$this->db_loaded[$cat][$key] = true;
}
// use the config cache for return
$result = $this->configCache->get($cat, $key);
return (isset($result)) ? $result : $default_value;
}
/**
* {@inheritDoc}
*/
public function set(string $cat, string $key, $value)
{
// set the cache first
$cached = $this->configCache->set($cat, $key, $value);
// If there is no connected adapter, we're finished
if (!$this->configModel->isConnected()) {
return $cached;
}
$stored = $this->configModel->set($cat, $key, $value);
$this->db_loaded[$cat][$key] = $stored;
return $cached && $stored;
}
/**
* {@inheritDoc}
*/
public function delete(string $cat, string $key)
{
$cacheRemoved = $this->configCache->delete($cat, $key);
if (isset($this->db_loaded[$cat][$key])) {
unset($this->db_loaded[$cat][$key]);
}
if (!$this->configModel->isConnected()) {
return $cacheRemoved;
}
$storeRemoved = $this->configModel->delete($cat, $key);
return $cacheRemoved || $storeRemoved;
}
}