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// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this
use crate::ErrorType;
/// A description for the [`LabeledMetric`](crate::metrics::LabeledMetric) type.
///
/// When changing this trait, make sure all the operations are
/// implemented in the related type in `../metrics/`.
pub trait Labeled<T>
where
T: Clone,
{
/// Gets a specific metric for a given label.
///
/// If a set of acceptable labels were specified in the `metrics.yaml` file,
/// and the given label is not in the set, it will be recorded under the special `OTHER_LABEL` label.
///
/// If a set of acceptable labels was not specified in the `metrics.yaml` file,
/// only the first 16 unique labels will be used.
/// After that, any additional labels will be recorded under the special `OTHER_LABEL` label.
///
/// Labels must be `snake_case` and less than 30 characters.
/// If an invalid label is used, the metric will be recorded in the special `OTHER_LABEL` label.
fn get(&self, label: &str) -> T;
/// **Exported for test purposes.**
///
/// Gets the number of recorded errors for the given metric and error type.
///
/// # Arguments
///
/// * `error` - The type of error
///
/// # Returns
///
/// The number of errors reported.
fn test_get_num_recorded_errors(&self, error: ErrorType) -> i32;
}