opentelemetry/logs/
noop.rs

1use std::{borrow::Cow, time::SystemTime};
2
3use crate::{
4    logs::{AnyValue, LogRecord, Logger, LoggerProvider, Severity},
5    InstrumentationScope, Key,
6};
7
8/// A no-op implementation of a [`LoggerProvider`].
9#[derive(Clone, Debug, Default)]
10pub struct NoopLoggerProvider(());
11
12impl NoopLoggerProvider {
13    /// Create a new no-op logger provider.
14    pub fn new() -> Self {
15        NoopLoggerProvider(())
16    }
17}
18
19impl LoggerProvider for NoopLoggerProvider {
20    type Logger = NoopLogger;
21
22    fn logger_with_scope(&self, _scope: InstrumentationScope) -> Self::Logger {
23        NoopLogger(())
24    }
25}
26
27#[derive(Debug, Clone, Default)]
28/// A no-operation log record that implements the LogRecord trait.
29pub struct NoopLogRecord;
30
31impl LogRecord for NoopLogRecord {
32    // Implement the LogRecord trait methods with empty bodies.
33    #[inline]
34    fn set_event_name(&mut self, _name: &'static str) {}
35    #[inline]
36    fn set_timestamp(&mut self, _timestamp: SystemTime) {}
37    #[inline]
38    fn set_observed_timestamp(&mut self, _timestamp: SystemTime) {}
39    #[inline]
40    fn set_severity_text(&mut self, _text: &'static str) {}
41    #[inline]
42    fn set_severity_number(&mut self, _number: Severity) {}
43    #[inline]
44    fn set_body(&mut self, _body: AnyValue) {}
45    #[inline]
46    fn add_attributes<I, K, V>(&mut self, _attributes: I)
47    where
48        I: IntoIterator<Item = (K, V)>,
49        K: Into<Key>,
50        V: Into<AnyValue>,
51    {
52    }
53    #[inline]
54    fn add_attribute<K, V>(&mut self, _key: K, _value: V)
55    where
56        K: Into<Key>,
57        V: Into<AnyValue>,
58    {
59    }
60
61    #[inline]
62    // Sets the `target` of a record
63    fn set_target<T>(&mut self, _target: T)
64    where
65        T: Into<Cow<'static, str>>,
66    {
67    }
68}
69
70/// A no-op implementation of a [`Logger`]
71#[derive(Clone, Debug)]
72pub struct NoopLogger(());
73
74impl Logger for NoopLogger {
75    type LogRecord = NoopLogRecord;
76
77    fn create_log_record(&self) -> Self::LogRecord {
78        NoopLogRecord {}
79    }
80    fn emit(&self, _record: Self::LogRecord) {}
81    #[cfg(feature = "spec_unstable_logs_enabled")]
82    fn event_enabled(&self, _level: super::Severity, _target: &str) -> bool {
83        false
84    }
85}
opentelemetry/logs/noop.rs

opentelemetry/logs/
noop.rs
