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log_emitter.rs
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log_emitter.rs
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use super::{BatchLogProcessor, Config, LogProcessor, SimpleLogProcessor};
use crate::{
export::logs::{LogData, LogExporter},
runtime::RuntimeChannel,
};
use opentelemetry::{
global::{self},
logs::{LogRecord, LogResult, TraceContext},
trace::TraceContextExt,
Context, InstrumentationLibrary,
};
#[cfg(feature = "logs_level_enabled")]
use opentelemetry::logs::Severity;
use std::{borrow::Cow, sync::Arc};
#[derive(Debug, Clone)]
/// Creator for `Logger` instances.
pub struct LoggerProvider {
inner: Arc<LoggerProviderInner>,
}
/// Default logger name if empty string is provided.
const DEFAULT_COMPONENT_NAME: &str = "rust.opentelemetry.io/sdk/logger";
impl opentelemetry::logs::LoggerProvider for LoggerProvider {
type Logger = Logger;
/// Create a new versioned `Logger` instance.
fn versioned_logger(
&self,
name: impl Into<Cow<'static, str>>,
version: Option<Cow<'static, str>>,
schema_url: Option<Cow<'static, str>>,
attributes: Option<Vec<opentelemetry::KeyValue>>,
) -> Logger {
let name = name.into();
let component_name = if name.is_empty() {
Cow::Borrowed(DEFAULT_COMPONENT_NAME)
} else {
name
};
self.library_logger(Arc::new(InstrumentationLibrary::new(
component_name,
version,
schema_url,
attributes,
)))
}
fn library_logger(&self, library: Arc<InstrumentationLibrary>) -> Self::Logger {
Logger::new(library, self.clone())
}
}
impl LoggerProvider {
/// Create a new `LoggerProvider` builder.
pub fn builder() -> Builder {
Builder::default()
}
/// Config associated with this provider.
pub fn config(&self) -> &Config {
&self.inner.config
}
/// Log processors associated with this provider.
pub fn log_processors(&self) -> &Vec<Box<dyn LogProcessor>> {
&self.inner.processors
}
/// Force flush all remaining logs in log processors and return results.
pub fn force_flush(&self) -> Vec<LogResult<()>> {
self.log_processors()
.iter()
.map(|processor| processor.force_flush())
.collect()
}
/// Shuts down this `LoggerProvider`, panicking on failure.
pub fn shutdown(&mut self) -> Vec<LogResult<()>> {
self.try_shutdown()
.expect("cannot shutdown LoggerProvider when child Loggers are still active")
}
/// Attempts to shutdown this `LoggerProvider`, succeeding only when
/// all cloned `LoggerProvider` values have been dropped.
pub fn try_shutdown(&mut self) -> Option<Vec<LogResult<()>>> {
Arc::get_mut(&mut self.inner).map(|inner| {
inner
.processors
.iter_mut()
.map(|processor| processor.shutdown())
.collect()
})
}
}
#[derive(Debug)]
struct LoggerProviderInner {
processors: Vec<Box<dyn LogProcessor>>,
config: Config,
}
impl Drop for LoggerProviderInner {
fn drop(&mut self) {
for processor in &mut self.processors {
if let Err(err) = processor.shutdown() {
global::handle_error(err);
}
}
}
}
#[derive(Debug, Default)]
/// Builder for provider attributes.
pub struct Builder {
processors: Vec<Box<dyn LogProcessor>>,
config: Config,
}
impl Builder {
/// The `LogExporter` that this provider should use.
pub fn with_simple_exporter<T: LogExporter + 'static>(self, exporter: T) -> Self {
let mut processors = self.processors;
processors.push(Box::new(SimpleLogProcessor::new(Box::new(exporter))));
Builder { processors, ..self }
}
/// The `LogExporter` setup using a default `BatchLogProcessor` that this provider should use.
pub fn with_batch_exporter<T: LogExporter + 'static, R: RuntimeChannel>(
self,
exporter: T,
runtime: R,
) -> Self {
let batch = BatchLogProcessor::builder(exporter, runtime).build();
self.with_log_processor(batch)
}
/// The `LogProcessor` that this provider should use.
pub fn with_log_processor<T: LogProcessor + 'static>(self, processor: T) -> Self {
let mut processors = self.processors;
processors.push(Box::new(processor));
Builder { processors, ..self }
}
/// The `Config` that this provider should use.
pub fn with_config(self, config: Config) -> Self {
Builder { config, ..self }
}
/// Create a new provider from this configuration.
pub fn build(self) -> LoggerProvider {
LoggerProvider {
inner: Arc::new(LoggerProviderInner {
processors: self.processors,
config: self.config,
}),
}
}
}
#[derive(Debug)]
/// The object for emitting [`LogRecord`]s.
///
/// [`LogRecord`]: opentelemetry::logs::LogRecord
pub struct Logger {
instrumentation_lib: Arc<InstrumentationLibrary>,
provider: LoggerProvider,
}
impl Logger {
pub(crate) fn new(
instrumentation_lib: Arc<InstrumentationLibrary>,
provider: LoggerProvider,
) -> Self {
Logger {
instrumentation_lib,
provider,
}
}
/// LoggerProvider associated with this logger.
pub fn provider(&self) -> &LoggerProvider {
&self.provider
}
/// Instrumentation library information of this logger.
pub fn instrumentation_library(&self) -> &InstrumentationLibrary {
&self.instrumentation_lib
}
}
impl opentelemetry::logs::Logger for Logger {
/// Emit a `LogRecord`.
fn emit(&self, record: LogRecord) {
let provider = self.provider();
let config = provider.config();
let processors = provider.log_processors();
let trace_context = Context::map_current(|cx| {
cx.has_active_span()
.then(|| TraceContext::from(cx.span().span_context()))
});
for p in processors {
let mut record = record.clone();
if let Some(ref trace_context) = trace_context {
record.trace_context = Some(trace_context.clone())
}
let data = LogData {
record,
resource: config.resource.clone(),
instrumentation: self.instrumentation_library().clone(),
};
p.emit(data);
}
}
#[cfg(feature = "logs_level_enabled")]
fn event_enabled(&self, level: Severity, target: &str) -> bool {
let provider = self.provider();
let mut enabled = false;
for processor in provider.log_processors() {
enabled = enabled
|| processor.event_enabled(
level,
target,
self.instrumentation_library().name.as_ref(),
);
}
enabled
}
}