private function createErrorStream($path = null)
{
$writer = null;
if ($path == null) {
$writer = new Zend_Log_Writer_Null();
} else {
self::$_errorLogPath = $path;
$writer = new Zend_Log_Writer_Stream($path);
$writer->addFilter(new Zend_Log_Filter_Priority(Zend_Log::ERR));
}
return new Logger_Application_ZendLogWrapper($writer);
}
