Optional<ArtifactCacheMetadata> getReadOnlyCacheMetadata();

    ArtifactCacheLockingAccessCoordinator getWritableCacheAccessCoordinator();
    Optional<ArtifactCacheLockingAccessCoordinator> getReadOnlyCacheAccessCoordinator();

    default <T> T withWritableCache(BiFunction<? super ArtifactCacheMetadata, ? super ArtifactCacheLockingAccessCoordinator, T> function) {

        return writableCacheAccessCoordinator;
    }

    @Override
    public Optional<ArtifactCacheLockingAccessCoordinator> getReadOnlyCacheAccessCoordinator() {
        return Optional.ofNullable(readOnlyCacheAccessCoordinator);
    }

    @Override
    public List<File> getGlobalCacheRoots() {
        return readOnlyCacheMetadata == null