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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 inherent::inherent;
use glean::traits::CustomDistribution;
use crate::ipc::with_ipc_payload;
use crate::private::{CustomDistributionMetric, DistributionData, MetricId};
use std::collections::HashMap;
#[cfg(feature = "with_gecko")]
use super::profiler_utils::{
truncate_vector_for_marker, DistributionMetricMarker, DistributionValues,
};
#[cfg(feature = "with_gecko")]
use gecko_profiler::{gecko_profiler_category, MarkerOptions};
/// A custom_distribution metric that knows it's a labeled custom distribution's submetric.
///
/// It has special work to do when in a non-parent process.
/// When on the parent process, it dispatches calls to the normal CustomDistributionMetric.
#[derive(Clone)]
pub enum LabeledCustomDistributionMetric {
Parent(CustomDistributionMetric),
Child { id: MetricId, label: String },
}
impl LabeledCustomDistributionMetric {
#[cfg(test)]
pub(crate) fn metric_id(&self) -> MetricId {
match self {
LabeledCustomDistributionMetric::Parent(p) => p.metric_id(),
LabeledCustomDistributionMetric::Child { id, .. } => *id,
}
}
}
#[inherent]
impl CustomDistribution for LabeledCustomDistributionMetric {
pub fn accumulate_samples_signed(&self, samples: Vec<i64>) {
match self {
LabeledCustomDistributionMetric::Parent(p) => p.accumulate_samples_signed(samples),
LabeledCustomDistributionMetric::Child { id, label } => {
#[cfg(feature = "with_gecko")]
if gecko_profiler::can_accept_markers() {
gecko_profiler::add_marker(
"CustomDistribution::accumulate",
gecko_profiler_category!(Telemetry),
MarkerOptions::default(),
DistributionMetricMarker::new(
*id,
Some(label.clone()),
DistributionValues::Samples(truncate_vector_for_marker(&samples)),
),
);
}
with_ipc_payload(move |payload| {
if let Some(map) = payload.labeled_custom_samples.get_mut(id) {
if let Some(v) = map.get_mut(label) {
v.extend(samples);
} else {
map.insert(label.to_string(), samples);
}
} else {
let mut map = HashMap::new();
map.insert(label.to_string(), samples);
payload.labeled_custom_samples.insert(*id, map);
}
});
}
}
}
pub fn accumulate_single_sample_signed(&self, sample: i64) {
match self {
LabeledCustomDistributionMetric::Parent(p) => p.accumulate_single_sample_signed(sample),
LabeledCustomDistributionMetric::Child { id, label } => {
#[cfg(feature = "with_gecko")]
if gecko_profiler::can_accept_markers() {
gecko_profiler::add_marker(
"CustomDistribution::accumulate",
gecko_profiler_category!(Telemetry),
MarkerOptions::default(),
DistributionMetricMarker::new(
*id,
Some(label.clone()),
DistributionValues::Sample(sample),
),
);
}
with_ipc_payload(move |payload| {
if let Some(map) = payload.labeled_custom_samples.get_mut(id) {
if let Some(v) = map.get_mut(label) {
v.push(sample);
} else {
map.insert(label.to_string(), vec![sample]);
}
} else {
let mut map = HashMap::new();
map.insert(label.to_string(), vec![sample]);
payload.labeled_custom_samples.insert(*id, map);
}
});
}
}
}
pub fn test_get_value<'a, S: Into<Option<&'a str>>>(
&self,
ping_name: S,
) -> Option<DistributionData> {
match self {
LabeledCustomDistributionMetric::Parent(p) => p.test_get_value(ping_name),
LabeledCustomDistributionMetric::Child { id, .. } => {
panic!("Cannot get test value for labeled_custom_distribution {:?} in non-parent process!", id)
}
}
}
pub fn test_get_num_recorded_errors(&self, error: glean::ErrorType) -> i32 {
match self {
LabeledCustomDistributionMetric::Parent(p) => p.test_get_num_recorded_errors(error),
LabeledCustomDistributionMetric::Child { id, .. } => panic!(
"Cannot get the number of recorded errors for labeled_custom_distribution {:?} in non-parent process!",
id
),
}
}
}
#[cfg(test)]
mod test {
use crate::{common_test::*, ipc, metrics};
#[test]
fn sets_labeled_custom_distribution_value_parent() {
let _lock = lock_test();
let metric = &metrics::test_only::mabels_custom_label_lengths;
metric.get("a_label").accumulate_single_sample_signed(1);
assert_eq!(1, metric.get("a_label").test_get_value(None).unwrap().sum);
}
#[test]
fn sets_labeled_custom_distribution_value_child() {
let _lock = lock_test();
let label = "some_label";
let parent_metric = &metrics::test_only::mabels_custom_label_lengths;
parent_metric.get(label).accumulate_single_sample_signed(3);
{
// scope for need_ipc RAII
let _raii = ipc::test_set_need_ipc(true);
// clear the per-process submetric cache,
// or else we'll be given the parent-process child metric.
{
let mut map =
crate::metrics::__glean_metric_maps::submetric_maps::CUSTOM_DISTRIBUTION_MAP
.write()
.expect("Write lock for CUSTOM_DISTRIBUTION_MAP was poisoned");
map.clear();
}
let child_metric = parent_metric.get(label);
let metric_id = child_metric.metric_id();
child_metric.accumulate_single_sample_signed(42);
ipc::with_ipc_payload(move |payload| {
assert_eq!(
vec![42],
*payload
.labeled_custom_samples
.get(&metric_id)
.unwrap()
.get(label)
.unwrap(),
"Stored the correct value in the ipc payload"
);
});
// clear the per-process submetric cache again,
// or else we'll be given the child-process child metric below.
{
let mut map =
crate::metrics::__glean_metric_maps::submetric_maps::CUSTOM_DISTRIBUTION_MAP
.write()
.expect("Write lock for CUSTOM_DISTRIBUTION_MAP was poisoned");
map.clear();
}
}
assert!(
false == ipc::need_ipc(),
"RAII dropped, should not need ipc any more"
);
assert!(ipc::replay_from_buf(&ipc::take_buf().unwrap()).is_ok());
assert_eq!(
45,
parent_metric.get(label).test_get_value(None).unwrap().sum,
"Values from the 'processes' should be summed"
);
}
}