Struct LocalBackend 

pub struct LocalBackend { /* private fields */ }

A storage backend that persists files to a directory on disk and keeps a metadata index in memory.

Implementations

impl LocalBackend

pub fn new(dir: impl AsRef<Path>) -> Result<Self, String>

Create a new LocalBackend rooted at dir. The directory is created if it does not already exist.

Trait Implementations

impl StorageBackend for LocalBackend

fn store( &self, id: &str, data: &[u8], metadata: &FileMetadata, ) -> Result<FileInfo, String>

Store data under the given ID with associated metadata.

fn retrieve(&self, id: &str) -> Result<Vec<u8>, String>

Retrieve the raw bytes for a stored file.

fn delete(&self, id: &str) -> Result<bool, String>

Delete a stored file. Returns true if the file existed and was removed.

fn exists(&self, id: &str) -> bool

Check whether a file exists.

fn metadata(&self, id: &str) -> Option<FileMetadata>

Retrieve metadata for a stored file, if it exists.

fn list(&self) -> Vec<String>

List all stored file IDs.