Enum BackendMetricProjectionError 

pub enum BackendMetricProjectionError {
    NonCanonicalDescriptor {
        metric_name: &'static str,
    },
    Duration(BackendDurationProjectionError),
    CumulativeHistogramDecreases {
        metric_name: &'static str,
        bucket_index: usize,
    },
    CumulativeHistogramCountMismatch {
        metric_name: &'static str,
        cumulative_count: u64,
        count: u64,
    },
    DisjointHistogramCountMismatch {
        metric_name: &'static str,
        bucket_count_sum: u64,
        count: u64,
    },
}

Projection failures that prevent an exporter from emitting a valid descriptor-owned backend metric.

Variants

NonCanonicalDescriptor

The supplied descriptor differs from the registered descriptor for its identity.

Fields

metric_name: &'static str

Name of the rejected descriptor.

Duration(BackendDurationProjectionError)

A duration cannot be converted to the descriptor’s declared unit.

CumulativeHistogramDecreases

Cumulative counts are not monotonically increasing.

Fields

metric_name: &'static str

Metric with invalid bucket counts.

bucket_index: usize

Zero-based index of the first decreasing cumulative bucket.

CumulativeHistogramCountMismatch

The final cumulative bucket differs from the histogram sample count.

Fields

metric_name: &'static str

Metric with inconsistent counts.

cumulative_count: u64

Count in the final cumulative +Inf bucket.

count: u64

Total histogram sample count.

DisjointHistogramCountMismatch

Disjoint bucket counts do not add up to the histogram sample count.

Fields

metric_name: &'static str

Metric with inconsistent counts.

bucket_count_sum: u64

Sum of disjoint bucket counts.

count: u64

Total histogram sample count.

Trait Implementations

impl Clone for BackendMetricProjectionError

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 BackendMetricProjectionError

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

Formats the value using the given formatter.

impl Display for BackendMetricProjectionError

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

Formats the value using the given formatter.

impl Eq for BackendMetricProjectionError

impl Error for BackendMetricProjectionError

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<BackendDurationProjectionError> for BackendMetricProjectionError

fn from(error: BackendDurationProjectionError) -> Self

Converts to this type from the input type.

impl PartialEq for BackendMetricProjectionError

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for BackendMetricProjectionError