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use crate::{api, exporter, sdk};
use std::sync::{Arc, Mutex};
use std::time::SystemTime;
#[derive(Clone, Debug)]
pub struct Span {
id: api::SpanId,
inner: Arc<SpanInner>,
}
#[derive(Debug)]
struct SpanInner {
data: Option<Mutex<exporter::trace::SpanData>>,
tracer: sdk::Tracer,
}
impl Span {
pub(crate) fn new(
id: api::SpanId,
data: Option<exporter::trace::SpanData>,
tracer: sdk::Tracer,
) -> Self {
Span {
id,
inner: Arc::new(SpanInner {
data: data.map(Mutex::new),
tracer,
}),
}
}
fn with_data<T, F>(&self, f: F) -> Option<T>
where
F: FnOnce(&exporter::trace::SpanData) -> T,
{
self.inner
.data
.as_ref()
.and_then(|inner| inner.lock().ok().map(|span_data| f(&span_data)))
}
fn with_data_mut<T, F>(&self, f: F) -> Option<T>
where
F: FnOnce(&mut exporter::trace::SpanData) -> T,
{
self.inner
.data
.as_ref()
.and_then(|inner| inner.lock().ok().map(|mut span_data| f(&mut span_data)))
}
}
impl api::Span for Span {
fn add_event_with_timestamp(
&self,
name: String,
timestamp: SystemTime,
attributes: Vec<api::KeyValue>,
) {
self.with_data_mut(|data| {
data.message_events
.push_back(api::Event::new(name, timestamp, attributes))
});
}
fn span_context(&self) -> api::SpanContext {
self.with_data(|data| data.span_context.clone())
.unwrap_or_else(|| {
api::SpanContext::new(api::TraceId::invalid(), api::SpanId::invalid(), 0, false)
})
}
fn is_recording(&self) -> bool {
self.inner.data.is_some()
}
fn set_attribute(&self, attribute: api::KeyValue) {
self.with_data_mut(|data| {
data.attributes.insert(attribute);
});
}
fn set_status(&self, code: api::StatusCode, message: String) {
self.with_data_mut(|data| {
data.status_code = code;
data.status_message = message
});
}
fn update_name(&self, new_name: String) {
self.with_data_mut(|data| {
data.name = new_name;
});
}
fn end(&self) {
self.with_data_mut(|data| {
data.end_time = SystemTime::now();
});
}
}
impl Drop for SpanInner {
fn drop(&mut self) {
if let Some(data) = self.data.take() {
if let Ok(mut inner) = data.lock() {
if inner.end_time == inner.start_time {
inner.end_time = SystemTime::now();
}
let exportable_span = Arc::new(inner.clone());
for processor in self.tracer.provider().span_processors() {
processor.on_end(exportable_span.clone())
}
}
}
}
}