public static FileDBRegistry create(AddFileInterface manager, Reader persistedState) {
        try (BufferedReader reader = new BufferedReader(persistedState)) {
            String ignoredFileSourceHost = reader.readLine();
            if (ignoredFileSourceHost == null)
                throw new RuntimeException("No file source host");
            return new FileDBRegistry(manager, decode(reader), true);
        } catch (IOException e) {
            throw new RuntimeException("Error while reading pre-generated file registry", e);
        }
    }
File registry for one application package

@author Tony Vaagenes
configserver/src/main/java/com/yahoo/vespa/config/server/filedistribution/FileDBRegistry.java