public function setRuntimePath($value)
{
$this->_runtimePath = $value;
if ($this->_cacheFile) {
$this->_cacheFile = $this->_runtimePath . DIRECTORY_SEPARATOR . self::CONFIGCACHE_FILE;
}
// generates unique ID by hashing the runtime path
$this->_uniqueID = md5($this->_runtimePath);
}