/**
* local save method, one end save ok is ok
*
* @param CacheItemInterface $item
* @param string $function save or saveDeferred
* @return bool
* @access protected
*/
protected function protectedSave(CacheItemInterface $item, $function = 'save')
{
// write to both ?
$func = $this->tester;
$both = $func($item);
// if $both is true, write to front
$res1 = false;
if ($both) {
if ($this->front->{$function}($item)) {
$res1 = true;
// ok
} else {
$this->setError($this->front->getError(), $this->front->getErrorCode());
}
}
// always write to backend
$res2 = false;
if ($this->back->{$function}($item)) {
$res2 = true;
// ok
} else {
$this->setError($this->back->getError(), $this->back->getErrorCode());
}
return $res1 || $res2 ? true : false;
}
/**
* {@inheritDoc}
*/
public function setDriver(DriverInterface $driver, $fallback = true)
{
// ping first
if ($driver->ping()) {
$this->driver = $driver;
return;
}
// fallback
if ($fallback) {
// set to fallback driver
$this->driver = $driver->getFallback();
// issue warning
trigger_error(Message::get(Message::CACHE_FALLBACK_DRIVER, get_class($driver), get_class($this->driver)), E_USER_WARNING);
} else {
throw new InvalidArgumentException(Message::get(Message::CACHE_FAIL_DRIVER, get_class($driver)), Message::CACHE_FAIL_DRIVER);
}
}
