Enum PersistenceDisabledReason

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pub enum PersistenceDisabledReason {
    NoDirectory,
    WorkerSpawnFailed,
    WorkerShutdown,
    QueueUnavailable,
}

Expand description

Why persistent publication is unavailable for a result cache. Each variant carries a stable PersistenceDisabledReason::label used in query traces and diagnostics.

Variants§

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NoDirectory

The cache has no persistent directory configured.

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WorkerSpawnFailed

The background worker (or its I/O setup) failed to start.

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WorkerShutdown

The background worker was shut down (e.g. Database::close).

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QueueUnavailable

The writer queue was unavailable (e.g. poisoned / not installed).

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impl PersistenceDisabledReason

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

Stable lowercase label for metrics, traces, and logs.

Trait Implementations§

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impl Clone for PersistenceDisabledReason

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fn clone(&self) -> PersistenceDisabledReason

Returns a duplicate of the value. Read more

1.0.0 (const: unstable) · Source§

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

Performs copy-assignment from source. Read more

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impl Copy for PersistenceDisabledReason

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impl Debug for PersistenceDisabledReason

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

Formats the value using the given formatter. Read more

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impl Display for PersistenceDisabledReason

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

Formats the value using the given formatter. Read more

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impl Eq for PersistenceDisabledReason

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impl PartialEq for PersistenceDisabledReason

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

Equality operator ==. Read more

1.0.0 (const: unstable) · Source§

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

Inequality operator !=. Read more

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impl StructuralPartialEq for PersistenceDisabledReason

Auto Trait Implementations§

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impl UnwindSafe for PersistenceDisabledReason

Blanket Implementations§

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impl<T> Any for T
where T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more

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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more

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impl<T> BorrowMut<T> for T
where T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more

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impl<T> CloneToUninit for T
where T: Clone,

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unsafe fn clone_to_uninit(&self, dest: *mut u8)

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

Performs copy-assignment from self to dest. Read more

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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T, U> Into for T
where U: From<T>,

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T> IntoEither for T

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fn into_either(self, into_left: bool) -> Either<Self, Self>

Converts self into a Left variant of Either<Self, Self> if into_left is true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more

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fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
where F: FnOnce(&Self) -> bool,

Converts self into a Left variant of Either<Self, Self> if into_left(&self) returns true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more

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