131 lines
4.0 KiB
Rust
131 lines
4.0 KiB
Rust
use crate::extensions::{Extension, ResolveInfo};
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use chrono::{DateTime, Utc};
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use parking_lot::Mutex;
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use serde::ser::SerializeMap;
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use serde::{Serialize, Serializer};
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use std::collections::BTreeMap;
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use std::ops::Deref;
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struct PendingResolve {
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path: serde_json::Value,
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field_name: String,
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parent_type: String,
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return_type: String,
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start_time: DateTime<Utc>,
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}
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struct ResolveStat {
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pending_resolve: PendingResolve,
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end_time: DateTime<Utc>,
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start_offset: i64,
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}
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impl Deref for ResolveStat {
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type Target = PendingResolve;
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fn deref(&self) -> &Self::Target {
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&self.pending_resolve
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}
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}
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impl Serialize for ResolveStat {
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fn serialize<S: Serializer>(&self, serializer: S) -> std::result::Result<S::Ok, S::Error> {
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let mut map = serializer.serialize_map(None)?;
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map.serialize_entry("path", &self.path)?;
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map.serialize_entry("fieldName", &self.field_name)?;
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map.serialize_entry("parentType", &self.parent_type)?;
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map.serialize_entry("returnType", &self.return_type)?;
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map.serialize_entry("startOffset", &self.start_offset)?;
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map.serialize_entry(
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"duration",
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&(self.end_time - self.start_time).num_nanoseconds(),
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)?;
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map.end()
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}
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}
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struct Inner {
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start_time: DateTime<Utc>,
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end_time: DateTime<Utc>,
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pending_resolves: BTreeMap<usize, PendingResolve>,
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resolves: Vec<ResolveStat>,
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}
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impl Default for Inner {
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fn default() -> Self {
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Self {
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start_time: Utc::now(),
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end_time: Utc::now(),
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pending_resolves: Default::default(),
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resolves: Default::default(),
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}
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}
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}
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/// Apollo tracing extension for performance tracing
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///
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/// Apollo Tracing works by including data in the extensions field of the GraphQL response, which is reserved by the GraphQL spec for extra information that a server wants to return. That way, you have access to performance traces alongside the data returned by your query.
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/// It’s already supported by `Apollo Engine`, and we’re excited to see what other kinds of integrations people can build on top of this format.
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#[derive(Default)]
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pub struct ApolloTracing {
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inner: Mutex<Inner>,
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}
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impl Extension for ApolloTracing {
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fn name(&self) -> &'static str {
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"tracing"
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}
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fn parse_start(&self, _query_source: &str) {
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self.inner.lock().start_time = Utc::now();
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}
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fn execution_end(&self) {
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self.inner.lock().end_time = Utc::now();
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}
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fn resolve_field_start(&self, info: &ResolveInfo<'_>) {
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let mut inner = self.inner.lock();
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inner.pending_resolves.insert(
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info.resolve_id,
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PendingResolve {
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path: info.path_node.to_json(),
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field_name: info.path_node.field_name().to_string(),
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parent_type: info.parent_type.to_string(),
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return_type: info.return_type.to_string(),
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start_time: Utc::now(),
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},
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);
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}
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fn resolve_field_end(&self, resolve_id: usize) {
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let mut inner = self.inner.lock();
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if let Some(pending_resolve) = inner.pending_resolves.remove(&resolve_id) {
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let start_offset = (pending_resolve.start_time - inner.start_time)
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.num_nanoseconds()
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.unwrap();
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inner.resolves.push(ResolveStat {
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pending_resolve,
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start_offset,
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end_time: Utc::now(),
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});
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}
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}
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fn result(&self) -> serde_json::Value {
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let mut inner = self.inner.lock();
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inner
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.resolves
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.sort_by(|a, b| a.start_offset.cmp(&b.start_offset));
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serde_json::json!({
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"version": 1,
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"startTime": inner.start_time.to_rfc3339(),
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"endTime": inner.end_time.to_rfc3339(),
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"duration": (inner.end_time - inner.start_time).num_nanoseconds(),
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"execution": {
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"resolvers": inner.resolves
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}
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})
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}
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}
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