Enum Direction 

#[repr(i32)]
pub enum Direction {
    Unspecified = 0,
    Request = 1,
    Response = 2,
    Tell = 3,
}

Direction of an RpcEnvelope on the wire.

Receivers route explicitly on this field instead of inferring request-vs-response from pending-state or tell-ness from timeout_ms. Routing policy: REQUEST and TELL are dispatched to a handler; RESPONSE wakes the matching pending request. Absence, DIRECTION_UNSPECIFIED, and unknown future values are invalid on the current wire protocol; receivers should warn and drop instead of guessing from local pending state.

Senders MUST set this on every envelope they construct.

Receivers trust this label without cross-checking pending state, so a mislabeled envelope is routed by its label: a request stamped Response is dropped if its request_id isn’t pending, and a response stamped Request is enqueued as a new call. The orphan-drop log includes route_key to make such mislabels diagnosable.

Variants

Unspecified = 0

Invalid default / missing direction sentinel; receivers warn + drop

Request = 1

A new RPC call addressed to a handler; a response is expected

Response = 2

A reply (success payload or ErrorResponse) to a prior request

Tell = 3

Fire-and-forget request; receiver MUST NOT reply

Implementations

impl Direction

pub const fn is_valid(value: i32) -> bool

Returns true if value is a variant of Direction.

pub fn from_i32(value: i32) -> Option<Direction>

👎Deprecated:

Use the TryFrom<i32> implementation instead

Converts an i32 to a Direction, or None if value is not a valid variant.

impl Direction

pub fn as_str_name(&self) -> &'static str

String value of the enum field names used in the ProtoBuf definition.

The values are not transformed in any way and thus are considered stable (if the ProtoBuf definition does not change) and safe for programmatic use.

pub fn from_str_name(value: &str) -> Option<Self>

Creates an enum from field names used in the ProtoBuf definition.

Trait Implementations

impl Clone for Direction

fn clone(&self) -> Direction

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for Direction

impl Debug for Direction

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

Formats the value using the given formatter.

impl Default for Direction

fn default() -> Direction

Returns the “default value” for a type.

impl Eq for Direction

impl From<Direction> for i32

fn from(value: Direction) -> i32

Converts to this type from the input type.

impl Hash for Direction

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 Ord for Direction

fn cmp(&self, other: &Direction) -> 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.

impl PartialEq for Direction

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

Equality operator ==.

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

Inequality operator !=.

impl PartialOrd for Direction

fn partial_cmp(&self, other: &Direction) -> 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 StructuralPartialEq for Direction

impl TryFrom<i32> for Direction

type Error = UnknownEnumValue

The type returned in the event of a conversion error.

fn try_from(value: i32) -> Result<Direction, UnknownEnumValue>

Performs the conversion.