Enum QuotaError 

pub enum QuotaError {
    TooManyRuns {
        tenant: String,
        running: u32,
    },
    SpentOut {
        tenant: String,
        period: String,
        unit: &'static str,
        spent: u64,
        limit: u64,
    },
    Halted {
        tenant: String,
        reason: String,
    },
    Unavailable(String),
}

Why a run was not admitted.

Variants

TooManyRuns

The tenant already has as many runs executing as it may.

Retryable, and that is the point: this is back-pressure, not a fault. The caller should try again rather than treat the work as impossible.

Fields

tenant: String

running: u32

SpentOut

The tenant has spent its ceiling for this period.

Fields

tenant: String

period: String

unit: &'static str

spent: u64

limit: u64

Halted

An operator stopped this tenant from starting new work.

Deliberately its own variant rather than a zero ceiling. A ceiling says not right now, and a caller is right to retry it; a halt says somebody is dealing with an incident, and retrying is exactly what an operator pulling the switch is trying to stop. Collapsing the two would teach callers to hammer through the one refusal that means stop.

Fields

tenant: String

reason: String

Unavailable(String)

The accounting itself could not be reached.

Fails closed. A quota that yields when its store is unreachable is a quota an attacker removes by making the store unreachable.

Trait Implementations

impl Clone for QuotaError

fn clone(&self) -> QuotaError

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for QuotaError

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

Formats the value using the given formatter.

impl Display for QuotaError

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

Formats the value using the given formatter.

impl Eq for QuotaError

impl Error for QuotaError

fn source(&self) -> Option<&(dyn Error + 'static)>

Returns the lower-level source of this error, if any.

fn description(&self) -> &str

👎Deprecated since 1.42.0:

use the Display impl or to_string()

fn cause(&self) -> Option<&dyn Error>

👎Deprecated since 1.33.0:

replaced by Error::source, which can support downcasting

fn provide<'a>(&'a self, request: &mut Request<'a>)

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

Provides type-based access to context intended for error reports.

impl From<QuotaError> for RuntimeError

fn from(source: QuotaError) -> Self

Converts to this type from the input type.

impl From<StoreError> for QuotaError

fn from(e: StoreError) -> Self

Converts to this type from the input type.

impl PartialEq for QuotaError

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for QuotaError