Struct StateMutation 

pub struct StateMutation {
    pub sequence: u64,
    pub key: String,
    pub old: Option<Value>,
    pub new: Option<Value>,
    pub origin: StateMutationOrigin,
    pub timestamp: SystemTime,
    pub delta: bool,
}

A single state mutation recorded in the bounded mutation journal.

Serializes to/from JSON for durable journaling (see JournalSink); timestamp is encoded as integer milliseconds since the Unix epoch.

Fields

sequence: u64

Monotonic sequence number assigned when the mutation was recorded.

key: String

State key that changed.

old: Option<Value>

Value before the mutation, or None when the key did not exist.

new: Option<Value>

Value after the mutation, or None when the key was removed.

origin: StateMutationOrigin

Operation that recorded the mutation.

timestamp: SystemTime

Wall-clock time at which the mutation was recorded. Serialized as milliseconds since the Unix epoch (timestamp_ms).

delta: bool

Whether the mutation was written to a delta-tracked view.

Trait Implementations

impl Clone for StateMutation

fn clone(&self) -> StateMutation

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for StateMutation

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for StateMutation

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl PartialEq for StateMutation

fn eq(&self, other: &StateMutation) -> 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 StateMutation

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

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for StateMutation