Trait CheckpointDriver 

pub trait CheckpointDriver: Send + Sync {
    // Required methods
    fn current_wal_bytes(&self) -> u64;
    fn last_checkpoint_wal_bytes(&self) -> u64;
    fn run_checkpoint(&self) -> CheckpointResult;
}

Trait the database must implement so the checkpointer can drive the actual checkpoint without depending on the full Database struct.

Required Methods

fn current_wal_bytes(&self) -> u64

Current WAL byte position. Used to decide when WAL has grown enough to trigger a checkpoint.

fn last_checkpoint_wal_bytes(&self) -> u64

Last completed checkpoint’s WAL byte position.

fn run_checkpoint(&self) -> CheckpointResult

Run a full checkpoint:

1. Walk every dirty page, flush via pager.
2. Write a Checkpoint WAL record.
3. Truncate WAL up to the previous checkpoint’s redo.

Returns (pages_flushed, new_redo_lsn, truncated_bytes).

Implementors