Revision control
Copy as Markdown
Other Tools
// 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 std::sync::Arc;
use uuid::Uuid;
use crate::common_metric_data::CommonMetricDataInternal;
use crate::error_recording::{record_error, test_get_num_recorded_errors, ErrorType};
use crate::metrics::Metric;
use crate::metrics::MetricType;
use crate::storage::StorageManager;
use crate::CommonMetricData;
use crate::Glean;
/// An UUID metric.
///
/// Stores UUID v4 (randomly generated) values.
#[derive(Clone, Debug)]
pub struct UuidMetric {
meta: Arc<CommonMetricDataInternal>,
}
impl MetricType for UuidMetric {
fn meta(&self) -> &CommonMetricDataInternal {
&self.meta
}
}
// IMPORTANT:
//
// When changing this implementation, make sure all the operations are
// also declared in the related trait in `../traits/`.
impl UuidMetric {
/// Creates a new UUID metric
pub fn new(meta: CommonMetricData) -> Self {
Self {
meta: Arc::new(meta.into()),
}
}
/// Sets to the specified value.
///
/// # Arguments
///
/// * `value` - The [`Uuid`] to set the metric to.
pub fn set(&self, value: String) {
let metric = self.clone();
crate::launch_with_glean(move |glean| metric.set_sync(glean, &value))
}
/// Sets to the specified value synchronously.
#[doc(hidden)]
pub fn set_sync<S: Into<String>>(&self, glean: &Glean, value: S) {
if !self.should_record(glean) {
return;
}
let value = value.into();
if let Ok(uuid) = uuid::Uuid::parse_str(&value) {
let value = Metric::Uuid(uuid.as_hyphenated().to_string());
glean.storage().record(glean, &self.meta, &value)
} else {
let msg = format!("Unexpected UUID value '{}'", value);
record_error(glean, &self.meta, ErrorType::InvalidValue, msg, None);
}
}
/// Sets to the specified value, from a string.
///
/// This should only be used from FFI. When calling directly from Rust, it
/// is better to use [`set`](UuidMetric::set).
///
/// # Arguments
///
/// * `glean` - The Glean instance this metric belongs to.
/// * `value` - The [`Uuid`] to set the metric to.
#[doc(hidden)]
pub fn set_from_uuid_sync(&self, glean: &Glean, value: Uuid) {
self.set_sync(glean, value.to_string())
}
/// Generates a new random [`Uuid`'] and sets the metric to it.
pub fn generate_and_set(&self) -> String {
let uuid = Uuid::new_v4();
let value = uuid.to_string();
let metric = self.clone();
crate::launch_with_glean(move |glean| metric.set_sync(glean, value));
uuid.to_string()
}
/// Generates a new random [`Uuid`'] and sets the metric to it synchronously.
#[doc(hidden)]
pub fn generate_and_set_sync(&self, storage: &Glean) -> Uuid {
let uuid = Uuid::new_v4();
self.set_sync(storage, uuid.to_string());
uuid
}
/// Gets the current-stored value as a string, or None if there is no value.
#[doc(hidden)]
pub fn get_value<'a, S: Into<Option<&'a str>>>(
&self,
glean: &Glean,
ping_name: S,
) -> Option<Uuid> {
let queried_ping_name = ping_name
.into()
.unwrap_or_else(|| &self.meta().inner.send_in_pings[0]);
match StorageManager.snapshot_metric_for_test(
glean.storage(),
queried_ping_name,
&self.meta.identifier(glean),
self.meta.inner.lifetime,
) {
Some(Metric::Uuid(uuid)) => Uuid::parse_str(&uuid).ok(),
_ => None,
}
}
/// **Test-only API (exported for FFI purposes).**
///
/// Gets the currently stored value as a string.
///
/// This doesn't clear the stored value.
///
/// # Arguments
///
/// * `ping_name` - the optional name of the ping to retrieve the metric
/// for. Defaults to the first value in `send_in_pings`.
///
/// # Returns
///
/// The stored value or `None` if nothing stored.
pub fn test_get_value(&self, ping_name: Option<String>) -> Option<String> {
crate::block_on_dispatcher();
crate::core::with_glean(|glean| {
self.get_value(glean, ping_name.as_deref())
.map(|uuid| uuid.to_string())
})
}
/// **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.
pub fn test_get_num_recorded_errors(&self, error: ErrorType) -> i32 {
crate::block_on_dispatcher();
crate::core::with_glean(|glean| {
test_get_num_recorded_errors(glean, self.meta(), error).unwrap_or(0)
})
}
}