Enum ReplayVerdict 

#[non_exhaustive]
pub enum ReplayVerdict {
    Fresh,
    Duplicate {
        prior_response: Option<Value>,
        in_flight: bool,
    },
    Conflict,
}

What a ReplayGuard says about a document offered for execution.

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

Fresh

This id has not been accepted before. The caller may execute, and MUST call ReplayGuard::record_response afterwards if it wants a later duplicate answered with the result.

Duplicate

This id was already accepted, under a document with the same digest — a §8.4 retry, or a replay. The caller MUST NOT execute again.

prior_response is the response the first execution produced, where the guard retained one. None means either that the specification defines no success response (§4.4.1’s fire-and-forget case, where silence is the correct disposition) or that the first execution has not finished — the two are distinguished by in_flight.

Fields

prior_response: Option<Value>

The response produced the first time, if one was recorded.

in_flight: bool

true while the original execution is still running. SPEC §7.2: “Where the original execution is still in progress, the consumer SHOULD return or expose the existing execution state rather than begin another.”

Conflict

This id was already accepted, under a document with a different digest. SPEC §7.2 item 11 requires idConflict, and requires that the document MUST NOT be treated as a retry of the original.

Trait Implementations

impl Clone for ReplayVerdict

fn clone(&self) -> ReplayVerdict

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ReplayVerdict

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

Formats the value using the given formatter.

impl PartialEq for ReplayVerdict

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for ReplayVerdict