1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
// 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
// file, You can obtain one at https://mozilla.org/MPL/2.0/.
use uuid::Uuid;
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: CommonMetricData,
}
impl MetricType for UuidMetric {
fn meta(&self) -> &CommonMetricData {
&self.meta
}
fn meta_mut(&mut self) -> &mut CommonMetricData {
&mut self.meta
}
}
impl UuidMetric {
/// Create a new UUID metric
pub fn new(meta: CommonMetricData) -> Self {
Self { meta }
}
/// Set to the specified value.
///
/// ## Arguments
///
/// * `glean` - The Glean instance this metric belongs to.
/// * `value` - The UUID to set the metric to.
pub fn set(&self, glean: &Glean, value: Uuid) {
if !self.should_record(glean) {
return;
}
let s = value.to_string();
let value = Metric::Uuid(s);
glean.storage().record(glean, &self.meta, &value)
}
/// Generate a new random UUID and set the metric to it.
///
/// ## Arguments
///
/// * `glean` - The Glean instance this metric belongs to.
pub fn generate_and_set(&self, storage: &Glean) -> Uuid {
let uuid = Uuid::new_v4();
self.set(storage, uuid);
uuid
}
/// Get the stored Uuid value.
///
/// ## Arguments
///
/// * `glean` - the Glean instance this metric belongs to.
/// * `storage_name` - the storage name to look into.
///
/// ## Return value
///
/// Returns the stored value or `None` if nothing stored.
pub(crate) fn get_value(&self, glean: &Glean, storage_name: &str) -> Option<Uuid> {
match StorageManager.snapshot_metric(
glean.storage(),
storage_name,
&self.meta().identifier(glean),
) {
Some(Metric::Uuid(uuid)) => Uuid::parse_str(&uuid).ok(),
_ => None,
}
}
/// **Test-only API (exported for FFI purposes).**
///
/// Get the currently stored value as a string.
///
/// This doesn't clear the stored value.
pub fn test_get_value(&self, glean: &Glean, storage_name: &str) -> Option<String> {
match StorageManager.snapshot_metric(
glean.storage(),
storage_name,
&self.meta.identifier(glean),
) {
Some(Metric::Uuid(s)) => Some(s),
_ => None,
}
}
}