/**
* Returns a instance of the cache, if the instance isn't available it creates a new one
*
* @return Zend_Cache_Core|Zend_Cache_Frontend
*/
public static function getInstance()
{
if (!empty($_REQUEST["nocache"])) {
self::disable();
}
if (!self::$instance instanceof Zend_Cache_Core) {
// default file based configuration
$config = self::getDefaultConfig();
// check for custom cache configuration
$customCacheFile = PIMCORE_CONFIGURATION_DIRECTORY . "/cache.xml";
if (is_file($customCacheFile)) {
try {
$conf = new Zend_Config_Xml($customCacheFile);
if ($conf->frontend) {
$config["frontendType"] = (string) $conf->frontend->type;
$config["customFrontendNaming"] = (bool) $conf->frontend->custom;
if ($conf->frontend->options) {
$config["frontendConfig"] = $conf->frontend->options->toArray();
}
}
if ($conf->backend) {
$config["backendType"] = (string) $conf->backend->type;
$config["customBackendNaming"] = (bool) $conf->backend->custom;
if ($conf->backend->options) {
$config["backendConfig"] = $conf->backend->options->toArray();
}
}
} catch (Exception $e) {
Logger::error($e);
Logger::error("Error while reading cache configuration");
}
}
self::$defaultLifetime = $config["frontendConfig"]["lifetime"];
// here you can use the cache backend you like
try {
self::$instance = self::initializeCache($config);
} catch (Exception $e) {
Logger::warning("can't initialize cache with the given configuration " . $e->getMessage());
}
}
// return default cache if cache cannot be initialized
if (!self::$instance instanceof Zend_Cache_Core) {
self::$instance = self::getDefaultCache();
}
// reset default lifetime
self::$instance->setLifetime(self::$defaultLifetime);
return self::$instance;
}
