Method try_new

datafusion/execution/src/cache/list_files_cache.rs:104–121

(
        cached_file_list: CachedFileList,
        ttl: Option<Duration>,
        now: Instant,
    )

impl ListFilesEntry {
    fn try_new(
        cached_file_list: CachedFileList,
        ttl: Option<Duration>,
        now: Instant,
    ) -> Option<Self> {
        let size_bytes = (cached_file_list.files.capacity() * size_of::<ObjectMeta>())
            + cached_file_list
                .files
                .iter()
                .map(meta_heap_bytes)
                .reduce(|acc, b| acc + b)?;

        Some(Self {
            metas: cached_file_list,
            size_bytes,
            expires: ttl.map(|t| now + t),
        })
    }
}

/// Calculates the number of bytes an [`ObjectMeta`] occupies in the heap.