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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 super::{CommonMetricData, MetricId};
use crate::ipc::need_ipc;
#[cfg(feature = "with_gecko")]
use super::profiler_utils::{
lookup_canonical_metric_name, truncate_string_for_marker, LookupError,
};
#[cfg(feature = "with_gecko")]
use gecko_profiler::gecko_profiler_category;
#[cfg(feature = "with_gecko")]
#[derive(serde::Serialize, serde::Deserialize, Debug)]
struct UrlMetricMarker {
id: MetricId,
val: String,
}
#[cfg(feature = "with_gecko")]
impl gecko_profiler::ProfilerMarker for UrlMetricMarker {
fn marker_type_name() -> &'static str {
"UrlMetric"
}
fn marker_type_display() -> gecko_profiler::MarkerSchema {
use gecko_profiler::schema::*;
let mut schema = MarkerSchema::new(&[Location::MarkerChart, Location::MarkerTable]);
schema.set_tooltip_label("{marker.data.id} {marker.data.val}");
schema.set_table_label("{marker.name} - {marker.data.id}: {marker.data.val}");
schema.add_key_label_format_searchable(
"id",
"Metric",
Format::String,
Searchable::Searchable,
);
schema.add_key_label_format_searchable("val", "Value", Format::Url, Searchable::Searchable);
schema
}
fn stream_json_marker_data(&self, json_writer: &mut gecko_profiler::JSONWriter) {
json_writer.string_property(
"id",
lookup_canonical_metric_name(&self.id).unwrap_or_else(LookupError::as_str),
);
json_writer.string_property("val", self.val.as_str());
}
}
/// Developer-facing API for recording URL metrics.
///
/// Instances of this class type are automatically generated by the parsers
/// at build time, allowing developers to record values that were previously
/// registered in the metrics.yaml file.
#[derive(Clone)]
pub enum UrlMetric {
Parent {
id: MetricId,
inner: glean::private::UrlMetric,
},
Child(UrlMetricIpc),
}
#[derive(Clone, Debug)]
pub struct UrlMetricIpc;
impl UrlMetric {
/// Create a new Url metric.
pub fn new(id: MetricId, meta: CommonMetricData) -> Self {
if need_ipc() {
UrlMetric::Child(UrlMetricIpc)
} else {
UrlMetric::Parent {
id,
inner: glean::private::UrlMetric::new(meta),
}
}
}
#[cfg(test)]
pub(crate) fn child_metric(&self) -> Self {
match self {
UrlMetric::Parent { .. } => UrlMetric::Child(UrlMetricIpc),
UrlMetric::Child(_) => panic!("Can't get a child metric from a child metric"),
}
}
}
#[inherent]
impl glean::traits::Url for UrlMetric {
pub fn set<S: Into<std::string::String>>(&self, value: S) {
match self {
#[allow(unused)]
UrlMetric::Parent { id, inner } => {
let value: String = value.into();
#[cfg(feature = "with_gecko")]
if gecko_profiler::can_accept_markers() {
gecko_profiler::add_marker(
"Url::set",
gecko_profiler_category!(Telemetry),
Default::default(),
UrlMetricMarker {
id: *id,
val: truncate_string_for_marker(value.clone()),
},
);
}
inner.set(value)
}
UrlMetric::Child(_) => {
log::error!(
"Unable to set Url metric in non-main process. This operation will be ignored."
);
// If we're in automation we can panic so the instrumentor knows they've gone wrong.
// This is a deliberate violation of Glean's "metric APIs must not throw" design.
assert!(!crate::ipc::is_in_automation(), "Attempted to set URL metric in non-main process, which is forbidden. This panics in automation.");
// TODO: Record an error.
}
};
}
pub fn test_get_value<'a, S: Into<Option<&'a str>>>(
&self,
ping_name: S,
) -> Option<std::string::String> {
let ping_name = ping_name.into().map(|s| s.to_string());
match self {
UrlMetric::Parent { inner, .. } => inner.test_get_value(ping_name),
UrlMetric::Child(_) => {
panic!("Cannot get test value for Url metric in non-main process!")
}
}
}
pub fn test_get_num_recorded_errors(&self, error: glean::ErrorType) -> i32 {
match self {
UrlMetric::Parent { inner, .. } => inner.test_get_num_recorded_errors(error),
UrlMetric::Child(_) => panic!(
"Cannot get the number of recorded errors for Url metric in non-main process!"
),
}
}
}
#[cfg(test)]
mod test {
use crate::{common_test::*, ipc, metrics};
#[test]
fn sets_url_value() {
let _lock = lock_test();
let metric = &metrics::test_only_ipc::a_url;
assert_eq!(
metric.test_get_value("store1").unwrap()
);
}
#[test]
fn url_ipc() {
// UrlMetric doesn't support IPC.
let _lock = lock_test();
let parent_metric = &metrics::test_only_ipc::a_url;
{
let child_metric = parent_metric.child_metric();
let _raii = ipc::test_set_need_ipc(true);
// Instrumentation calls do not panic.
// (They also shouldn't do anything,
// but that's not something we can inspect in this test)
}
assert!(ipc::replay_from_buf(&ipc::take_buf().unwrap()).is_ok());
assert!(
"Url metrics should only work in the parent process"
);
}
}