opentelemetry/logs/
noop.rs

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1use std::{borrow::Cow, sync::Arc, time::SystemTime};
2
3use crate::{
4    logs::{AnyValue, LogRecord, Logger, LoggerProvider, Severity},
5    InstrumentationLibrary, Key, KeyValue,
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 library_logger(&self, _library: Arc<InstrumentationLibrary>) -> Self::Logger {
23        NoopLogger(())
24    }
25
26    fn versioned_logger(
27        &self,
28        _name: impl Into<Cow<'static, str>>,
29        _version: Option<Cow<'static, str>>,
30        _schema_url: Option<Cow<'static, str>>,
31        _attributes: Option<Vec<KeyValue>>,
32    ) -> Self::Logger {
33        NoopLogger(())
34    }
35}
36
37#[derive(Debug, Clone, Default)]
38/// A no-operation log record that implements the LogRecord trait.
39pub struct NoopLogRecord;
40
41impl LogRecord for NoopLogRecord {
42    // Implement the LogRecord trait methods with empty bodies.
43    #[inline]
44    fn set_event_name<T>(&mut self, _name: T)
45    where
46        T: Into<Cow<'static, str>>,
47    {
48    }
49    #[inline]
50    fn set_timestamp(&mut self, _timestamp: SystemTime) {}
51    #[inline]
52    fn set_observed_timestamp(&mut self, _timestamp: SystemTime) {}
53    #[inline]
54    fn set_severity_text(&mut self, _text: Cow<'static, str>) {}
55    #[inline]
56    fn set_severity_number(&mut self, _number: Severity) {}
57    #[inline]
58    fn set_body(&mut self, _body: AnyValue) {}
59    #[inline]
60    fn add_attributes<I, K, V>(&mut self, _attributes: I)
61    where
62        I: IntoIterator<Item = (K, V)>,
63        K: Into<Key>,
64        V: Into<AnyValue>,
65    {
66    }
67    #[inline]
68    fn add_attribute<K, V>(&mut self, _key: K, _value: V)
69    where
70        K: Into<Key>,
71        V: Into<AnyValue>,
72    {
73    }
74
75    #[inline]
76    // Sets the `target` of a record
77    fn set_target<T>(&mut self, _target: T)
78    where
79        T: Into<Cow<'static, str>>,
80    {
81    }
82}
83
84/// A no-op implementation of a [`Logger`]
85#[derive(Clone, Debug)]
86pub struct NoopLogger(());
87
88impl Logger for NoopLogger {
89    type LogRecord = NoopLogRecord;
90
91    fn create_log_record(&self) -> Self::LogRecord {
92        NoopLogRecord {}
93    }
94    fn emit(&self, _record: Self::LogRecord) {}
95    #[cfg(feature = "logs_level_enabled")]
96    fn event_enabled(&self, _level: super::Severity, _target: &str) -> bool {
97        false
98    }
99}
opentelemetry/logs/noop.rs

opentelemetry/logs/
noop.rs
