public static String buildMetaDataPath(final String namespaceId, final String path) {
        return handlePathData(String.join(PATH_SEPARATOR, PATH_SEPARATOR + namespaceId, META_DATA, path));
    }
Build meta data path string.

@param namespaceId the namespace id
@param path the path
@return the string
shenyu-common/src/main/java/org/apache/shenyu/common/constant/DefaultPathConstants.java