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use opentelemetry::Key;
use opentelemetry::KeyValue;
use opentelemetry::OrderMap;
use tracing_subscriber::Layer;
use tracing_subscriber::Registry;
use tracing_subscriber::layer::Context;
use tracing_subscriber::registry::LookupSpan;
use super::consts::OTEL_KIND;
use super::consts::OTEL_NAME;
use super::consts::OTEL_STATUS_CODE;
use super::consts::OTEL_STATUS_MESSAGE;
use super::formatters::APOLLO_PRIVATE_PREFIX;
use super::otel::OtelData;
use super::otel::layer::str_to_span_kind;
use super::otel::layer::str_to_status;
use super::reload::IsSampled;
#[derive(Debug, Default)]
pub(crate) struct LogAttributes {
attributes: Vec<KeyValue>,
}
impl LogAttributes {
pub(crate) fn attributes(&self) -> &Vec<KeyValue> {
&self.attributes
}
pub(crate) fn insert(&mut self, kv: KeyValue) {
self.attributes.push(kv);
}
pub(crate) fn extend(&mut self, other: impl IntoIterator<Item = KeyValue>) {
self.attributes.extend(other);
}
}
/// To add dynamic attributes for spans
pub(crate) struct DynAttributeLayer;
impl<S> Layer<S> for DynAttributeLayer
where
S: tracing_core::Subscriber + for<'lookup> tracing_subscriber::registry::LookupSpan<'lookup>,
{
fn on_new_span(
&self,
_attrs: &tracing_core::span::Attributes<'_>,
id: &tracing_core::span::Id,
ctx: Context<'_, S>,
) {
let span = ctx.span(id).expect("Span not found, this is a bug");
let mut extensions = span.extensions_mut();
if extensions.get_mut::<LogAttributes>().is_none() {
extensions.insert(LogAttributes::default());
}
if extensions.get_mut::<EventAttributes>().is_none() {
extensions.insert(EventAttributes::default());
}
}
}
impl DynAttributeLayer {
pub(crate) fn new() -> Self {
Self {}
}
}
/// To add dynamic attributes for spans
pub(crate) trait SpanDynAttribute {
fn set_span_dyn_attribute(&self, key: Key, value: opentelemetry::Value);
fn set_span_dyn_attributes(&self, attributes: impl IntoIterator<Item = KeyValue>);
}
impl SpanDynAttribute for ::tracing::Span {
fn set_span_dyn_attribute(&self, key: Key, value: opentelemetry::Value) {
self.with_subscriber(move |(id, dispatch)| {
if let Some(reg) = dispatch.downcast_ref::<Registry>() {
match reg.span(id) {
None => eprintln!("no spanref, this is a bug"),
Some(s) => {
if s.is_sampled() {
let mut extensions = s.extensions_mut();
match extensions.get_mut::<OtelData>() {
Some(otel_data) => {
update_otel_data(otel_data, &key, &value);
if otel_data.builder.attributes.is_none() {
otel_data.builder.attributes =
Some([(key, value)].into_iter().collect());
} else {
otel_data
.builder
.attributes
.as_mut()
.expect("we checked the attributes value in the condition above")
.insert(key, value);
}
}
None => {
// Can't use ::tracing::error! because it could create deadlock on extensions
eprintln!("no OtelData, this is a bug");
}
}
} else {
if key.as_str().starts_with(APOLLO_PRIVATE_PREFIX) {
return;
}
let mut extensions = s.extensions_mut();
match extensions.get_mut::<LogAttributes>() {
Some(attributes) => {
attributes.insert(KeyValue::new(key, value));
}
None => {
// Can't use ::tracing::error! because it could create deadlock on extensions
eprintln!("no LogAttributes, this is a bug");
}
}
}
}
};
} else {
::tracing::error!("no Registry, this is a bug");
}
});
}
fn set_span_dyn_attributes(&self, attributes: impl IntoIterator<Item = KeyValue>) {
let mut attributes = attributes.into_iter().peekable();
if attributes.peek().is_none() {
return;
}
self.with_subscriber(move |(id, dispatch)| {
if let Some(reg) = dispatch.downcast_ref::<Registry>() {
match reg.span(id) {
None => eprintln!("no spanref, this is a bug"),
Some(s) => {
if s.is_sampled() {
let mut extensions = s.extensions_mut();
match extensions.get_mut::<OtelData>() {
Some(otel_data) => {
if otel_data.builder.attributes.is_none() {
otel_data.builder.attributes = Some(
attributes
.inspect(|attr| {
update_otel_data(
otel_data,
&attr.key,
&attr.value,
)
})
.collect(),
);
} else {
let attributes: Vec<KeyValue> = attributes
.inspect(|attr| {
update_otel_data(otel_data, &attr.key, &attr.value)
})
.collect();
otel_data
.builder
.attributes
.as_mut()
.unwrap()
.extend(attributes);
}
}
None => {
// Can't use ::tracing::error! because it could create deadlock on extensions
eprintln!("no OtelData, this is a bug");
}
}
} else {
let mut attributes = attributes
.filter(|kv| !kv.key.as_str().starts_with(APOLLO_PRIVATE_PREFIX))
.peekable();
if attributes.peek().is_none() {
return;
}
let mut extensions = s.extensions_mut();
match extensions.get_mut::<LogAttributes>() {
Some(registered_attributes) => {
registered_attributes.extend(attributes);
}
None => {
// Can't use ::tracing::error! because it could create deadlock on extensions
eprintln!("no LogAttributes, this is a bug");
}
}
}
}
};
} else {
::tracing::error!("no Registry, this is a bug");
}
});
}
}
fn update_otel_data(otel_data: &mut OtelData, key: &Key, value: &opentelemetry::Value) {
match key.as_str() {
OTEL_NAME if otel_data.forced_span_name.is_none() => {
otel_data.forced_span_name = Some(value.to_string())
}
OTEL_KIND => otel_data.builder.span_kind = str_to_span_kind(&value.as_str()),
OTEL_STATUS_CODE => otel_data.forced_status = str_to_status(&value.as_str()).into(),
OTEL_STATUS_MESSAGE => {
otel_data.builder.status =
opentelemetry::trace::Status::error(value.as_str().to_string())
}
_ => {}
}
}
#[derive(Debug, Default)]
pub(crate) struct EventAttributes {
attributes: Vec<KeyValue>,
}
impl EventAttributes {
pub(crate) fn extend(&mut self, other: impl IntoIterator<Item = KeyValue>) {
self.attributes.extend(other);
}
pub(crate) fn take(&mut self) -> Vec<KeyValue> {
std::mem::take(&mut self.attributes)
}
}
/// To add dynamic attributes for spans
pub(crate) trait EventDynAttribute {
/// Always use before sending the event
fn set_event_dyn_attributes(&self, attributes: impl IntoIterator<Item = KeyValue>);
}
impl EventDynAttribute for ::tracing::Span {
fn set_event_dyn_attributes(&self, attributes: impl IntoIterator<Item = KeyValue>) {
let mut attributes = attributes.into_iter().peekable();
if attributes.peek().is_none() {
return;
}
self.with_subscriber(move |(id, dispatch)| {
if let Some(reg) = dispatch.downcast_ref::<Registry>() {
match reg.span(id) {
None => {
eprintln!("no spanref, this is a bug");
}
Some(s) => {
if s.is_sampled() {
let mut extensions = s.extensions_mut();
match extensions.get_mut::<OtelData>() {
Some(otel_data) => match &mut otel_data.event_attributes {
Some(event_attributes) => {
event_attributes
.extend(attributes.map(|kv| (kv.key, kv.value)));
}
None => {
otel_data.event_attributes = Some(OrderMap::from_iter(
attributes.map(|kv| (kv.key, kv.value)),
));
}
},
None => {
// Can't use ::tracing::error! because it could create deadlock on extensions
eprintln!("no OtelData, this is a bug");
}
}
} else {
let mut attributes = attributes
.filter(|kv| !kv.key.as_str().starts_with(APOLLO_PRIVATE_PREFIX))
.peekable();
if attributes.peek().is_none() {
return;
}
let mut extensions = s.extensions_mut();
match extensions.get_mut::<EventAttributes>() {
Some(registered_attributes) => {
registered_attributes.extend(attributes);
}
None => {
// Can't use ::tracing::error! because it could create deadlock on extensions
eprintln!("no EventAttributes, this is a bug");
}
}
}
}
};
} else {
::tracing::error!("no Registry, this is a bug");
}
});
}
}