Struct Stale 

pub struct Stale {
    pub since: String,
    pub class: Option<String>,
}

Why an entry is being served through a failure, and since when.

Fields

since: String

When the producer first failed to refresh this entry, RFC3339.

Distinct from fetched_at, which is when the served reading was obtained. The gap between them is how long the producer has been unable to look, which is the quantity a staleness policy actually wants: a reading can be minutes old with the producer perfectly healthy, or seconds old with the producer failing since just after it was taken.

class: Option<String>

The failure class, using the same vocabulary as error_class on a degraded entry.

Carried so a consumer can tell a flapping upstream from a credential that has started refusing, without branching on prose. Optional because a producer may preserve a reading for a reason it cannot classify.

Trait Implementations

impl Clone for Stale

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Stale

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for Stale

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl PartialEq for Stale

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

Equality operator ==.

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

Inequality operator !=.

impl Serialize for Stale

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 Stale