Struct RetentionPolicy 

pub struct RetentionPolicy {
    pub generations: Option<u32>,
    pub roll_interval: Option<Duration>,
}

Composable retention policy for FileLog’s rotated backups (NEW-157). Both fields are independently optional and may be set together (e.g. “roll daily, keep the last 30 dated files”).

Fields

generations: Option<u32>

Keep at most this many rotated backups, pruning the oldest once exceeded. Some(0) is rejected at FileLog::open_with_options time (indistinguishable from “no policy”, so treated as a config error rather than silently behaving like None).

roll_interval: Option<Duration>

Roll onto a new dated backup once this much wall-clock time has elapsed since the active file’s current interval began, in addition to (not instead of) the existing MaxFileLogSize size trigger. A raw Duration (rather than a fixed Daily/Hourly enum) so operators can pick any interval; Some(Duration::ZERO) is rejected as invalid.

Trait Implementations

impl Clone for RetentionPolicy

fn clone(&self) -> RetentionPolicy

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Copy for RetentionPolicy

impl Debug for RetentionPolicy

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for RetentionPolicy

fn default() -> RetentionPolicy

Returns the “default value” for a type.