Struct RecordHeader 

pub struct RecordHeader {
    pub offset: Offset,
    pub prev_hash: Hash,
    pub timestamp: Timestamp,
    pub payload_len: u32,
    pub record_kind: RecordKind,
}

Metadata header for every log record.

This structure contains all metadata needed to verify and process a log record without reading its payload.

Fields

offset: Offset

Position in the log (0-indexed).

prev_hash: Hash

SHA-256 link to the previous record’s hash (genesis for first record).

timestamp: Timestamp

When the record was committed (monotonic wall-clock).

payload_len: u32

Size of the payload in bytes.

record_kind: RecordKind

Type of record (Data, Checkpoint, Tombstone).

Implementations

impl RecordHeader

pub fn new( offset: Offset, prev_hash: Hash, timestamp: Timestamp, payload_len: u32, record_kind: RecordKind, ) -> Self

Creates a new record header.

Arguments

• offset - Position in the log
• prev_hash - Hash of the previous record (or GENESIS for first)
• timestamp - When this record was committed
• payload_len - Size of the payload in bytes
• record_kind - Type of record

pub fn is_genesis(&self) -> bool

Returns true if this is the first record in the log.

Trait Implementations

impl Clone for RecordHeader

fn clone(&self) -> RecordHeader

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for RecordHeader

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for RecordHeader

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Hash for RecordHeader

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for RecordHeader

fn eq(&self, other: &RecordHeader) -> 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 Serialize for RecordHeader

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl Copy for RecordHeader

impl Eq for RecordHeader

impl StructuralPartialEq for RecordHeader