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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
/// [`CustomDistributionMetric`](crate::metrics::CustomDistributionMetric) type.
///
/// When changing this trait, make sure all the operations are
/// implemented in the related type in `../metrics/`.
pub trait CustomDistribution {
/// Accumulates the provided signed samples in the metric.
///
/// This is required so that the platform-specific code can provide us with
/// 64 bit signed integers if no `u64` comparable type is available. This
/// will take care of filtering and reporting errors for any provided negative
/// sample.
///
/// # Arguments
///
/// - `samples` - The vector holding the samples to be recorded by the metric.
///
/// ## Notes
///
/// Discards any negative value in `samples` and report an
/// [`ErrorType::InvalidValue`](crate::ErrorType::InvalidValue) for each of
/// them.
fn accumulate_samples_signed(&self, samples: Vec<i64>);
/// Accumulates precisely one signed sample in the metric.
///
/// This is required so that the platform-specific code can provide us with a
/// 64 bit signed integer if no `u64` comparable type is available. This
/// will take care of filtering and reporting errors.
///
/// # Arguments
///
/// - `sample` - The singular sample to be recorded by the metric.
///
/// ## Notes
///
/// Discards any negative value of `sample` and reports an
/// [`ErrorType::InvalidValue`](crate::ErrorType::InvalidValue).
fn accumulate_single_sample_signed(&self, sample: i64);
/// **Exported for test purposes.**
///
/// Gets the currently stored histogram.
///
/// This doesn't clear the stored value.
///
/// # Arguments
///
/// * `ping_name` - represents the optional name of the ping to retrieve the
/// metric for. Defaults to the first value in `send_in_pings`.
fn test_get_value<'a, S: Into<Option<&'a str>>>(
&self,
ping_name: S,
) -> Option<crate::metrics::DistributionData>;
/// **Exported for test purposes.**
///
/// Gets the number of recorded errors for the given error type.
///
/// # Arguments
///
/// * `error` - The type of error
///
/// # Returns
///
/// The number of errors recorded.
fn test_get_num_recorded_errors(&self, error: ErrorType) -> i32;
}