Struct BackupEngine 

pub struct BackupEngine { /* private fields */ }

Engine that creates, lists, restores, verifies and prunes backups.

Each backup is stored as a pair of files:

• <id>.dat — the (possibly compressed) triple data
• <id>.json — the BackupManifest

Implementations

impl BackupEngine

pub fn new(backup_dir: PathBuf, max_backups: usize) -> Self

Create a new BackupEngine rooted at backup_dir.

pub fn create_backup( &self, triples: &[(String, String, String)], dataset_name: &str, format: BackupFormat, compression: BackupCompression, ) -> Result<BackupManifest>

Create a backup of triples and write it to the backup directory.

pub fn list_backups(&self) -> Vec<BackupManifest>

List all manifests in the backup directory, sorted newest-first.

pub fn restore(&self, backup_id: &str) -> Result<Vec<(String, String, String)>>

Restore triples from the backup identified by backup_id.

pub fn verify(&self, backup_id: &str) -> Result<bool>

Verify a backup by re-computing its SHA-256 checksum.

Returns true if the stored checksum matches.

pub fn delete_backup(&self, backup_id: &str) -> Result<()>

Delete the backup identified by backup_id.

pub fn prune_old(&self, keep_count: usize) -> usize

Delete the oldest backups, keeping only the keep_count most recent.

Returns the number of backups deleted.