Struct DropPrefix 

pub struct DropPrefix {
    pub keep_tail: usize,
}

Drop oldest messages via select_compaction_range (tool-safe).

Fields

keep_tail: usize

Messages to keep at the tail (including system when present).

Implementations

impl DropPrefix

pub const fn new(keep_tail: usize) -> Self

Construct.

Trait Implementations

impl Clone for DropPrefix

fn clone(&self) -> DropPrefix

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl CompactionStrategy for DropPrefix

fn name(&self) -> &'static str

Stable strategy id (max_messages, token_threshold, …).

fn should_compact(&self, messages: &[Message], _token_estimate: u64) -> bool

Whether compaction should run given current size estimates.

fn compact( &self, messages: Vec<Message>, ) -> Result<CompactionOutcome, MachiError>

Produce a compacted message list.

impl Copy for DropPrefix

impl Debug for DropPrefix

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

Formats the value using the given formatter.