Struct CalvinAppliedPayload 

pub struct CalvinAppliedPayload {
    pub epoch: u64,
    pub position: u32,
    pub vshard_id: u32,
}

Payload for super::types::RecordType::CalvinApplied.

Written by the Calvin executor after a MetaOp::CalvinExecute batch commits successfully. Encodes { epoch, position, vshard_id } so the scheduler’s restart path can scan the WAL and find last_applied_epoch for a given vshard without reading the full Raft log.

Fixed little-endian encoding — no msgpack framing.

Fields

epoch: u64

Sequencer epoch of the applied transaction.

position: u32

Zero-based position within the epoch batch.

vshard_id: u32

The vshard that applied this transaction.

Implementations

impl CalvinAppliedPayload

pub fn new(epoch: u64, position: u32, vshard_id: u32) -> Self

Construct a new payload.

pub fn to_bytes(&self) -> [u8; 16]

Serialize to fixed-size bytes for WAL append.

Layout: epoch (8 LE) | position (4 LE) | vshard_id (4 LE).

pub fn from_bytes(bytes: &[u8]) -> Result<Self>

Deserialize from bytes read from the WAL.

Trait Implementations

impl Clone for CalvinAppliedPayload

fn clone(&self) -> CalvinAppliedPayload

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for CalvinAppliedPayload

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

Formats the value using the given formatter.

impl PartialEq for CalvinAppliedPayload

fn eq(&self, other: &CalvinAppliedPayload) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Copy for CalvinAppliedPayload

impl Eq for CalvinAppliedPayload

impl StructuralPartialEq for CalvinAppliedPayload