Struct CommandId 

pub struct CommandId(pub Uuid);

Identifies one typed command envelope. Distinct from the idempotency key: two envelopes may share an idempotency key when a turn is replayed.

Tuple Fields

0: Uuid

Implementations

impl CommandId

pub fn derive(turn_id: &TurnId, act: ActId, position: usize) -> Self

Derives the identifier of the position-th command compiled for act of turn_id.

Shipped reducers must use this instead of CommandId::new: the identifier is part of the ReductionPlan hash, so a random one would make two reductions of the same inputs disagree and defeat replay (I20).

impl CommandId

pub fn new() -> Self

Generates a new time-ordered (UUID v7) identifier.

Identifiers that must be reproducible across a replay are derived instead: see derive on the types that have one.

pub const fn nil() -> Self

The all-zero identifier, useful as a sentinel in tests and fixtures.

pub const fn as_uuid(&self) -> &Uuid

Returns the underlying UUID.

pub fn is_nil(&self) -> bool

Returns true when this is the nil identifier.

Trait Implementations

impl Clone for CommandId

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for CommandId

impl Debug for CommandId

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for CommandId

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Display for CommandId

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

Formats the value using the given formatter.

impl Eq for CommandId

impl From<CommandId> for Uuid

fn from(value: CommandId) -> Self

Converts to this type from the input type.

impl From<Uuid> for CommandId

fn from(value: Uuid) -> Self

Converts to this type from the input type.

impl FromStr for CommandId

type Err = Error

The associated error which can be returned from parsing.

fn from_str(s: &str) -> Result<Self, Self::Err>

Parses a string s to return a value of this type.

impl Hash for CommandId

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 JsonSchema for CommandId

fn schema_name() -> Cow<'static, str>

The name of the generated JSON Schema.

fn schema_id() -> Cow<'static, str>

Returns a string that uniquely identifies the schema produced by this type.

fn json_schema(generator: &mut SchemaGenerator) -> Schema

Generates a JSON Schema for this type.

fn inline_schema() -> bool

Whether JSON Schemas generated for this type should be included directly in parent schemas, rather than being re-used where possible using the $ref keyword.

impl Ord for CommandId

fn cmp(&self, other: &Self) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized,

Restrict a value to a certain interval.

fn clamp_to<R>(self, range: R) -> Self

where Self: Sized, R: ClampBounds<Self>,

🔬This is a nightly-only experimental API. (clamp_to)

Restrict a value to a certain range.

impl PartialEq for CommandId

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

Equality operator ==.

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

Inequality operator !=.

impl PartialOrd for CommandId

fn partial_cmp(&self, other: &Self) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

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

Tests less than (for self and other) and is used by the < operator.

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

Tests less than or equal to (for self and other) and is used by the <= operator.

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

Tests greater than (for self and other) and is used by the > operator.

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

Tests greater than or equal to (for self and other) and is used by the >= operator.

impl Serialize for CommandId

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 CommandId