add experimental tracing using a native event collector

.github/workflows/collector.yml

@@ -0,0 +1,31 @@
+name: Collector
+
+on:
+  pull_request:
+  push:
+    branches: [master]
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref || github.run_id }}
+  cancel-in-progress: true
+
+jobs:
+  express:
+    runs-on: ubuntu-latest
+    env:
+      PLUGINS: express|body-parser|cookie-parser
+    steps:
+      - uses: actions/checkout@v4
+      - run: curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh -s -- -y --default-toolchain nightly
+      - uses: ./.github/actions/testagent/start
+      - uses: ./.github/actions/node/setup
+      - run: yarn install
+      - run: git clone https://github.com/DataDog/libdatadog-nodejs.git
+      - uses: ./.github/actions/node/oldest
+      - run: cd libdatadog-nodejs && npm install && npm run build
+      - run: NODE_OPTIONS="-r $PWD/libdatadog-nodejs/global" yarn test:plugins:ci
+      - uses: ./.github/actions/node/latest
+      - run: cd libdatadog-nodejs && npm install && npm run build
+      - run: NODE_OPTIONS="-r $PWD/libdatadog-nodejs/global" yarn test:plugins:ci
+      - if: always()
+        uses: ./.github/actions/testagent/logs

integration-tests/helpers.js

@@ -37,6 +37,40 @@ class FakeAgent extends EventEmitter {
         payload: msgpack.decode(req.body, { codec })
       })
     })
+    app.put('/v0.5/traces', (req, res) => {
+      if (req.body.length === 0) return res.status(200).send()
+      res.status(200).send({ rate_by_service: { 'service:,env:': 1 } })
+      const [strings, traces] = msgpack.decode(req.body, { codec })
+      this.emit('message', {
+        headers: req.headers,
+        payload: traces.map(trace => {
+          return trace.map(span => {
+            const meta = {}
+            const metrics = {}
+
+            Object.keys(span[9]).forEach(key => { meta[strings[key]] = strings[span[9][key]] })
+            Object.keys(span[10]).forEach(key => { metrics[strings[key]] = span[10][key] })
+
+            span = {
+              service: strings[span[0]],
+              name: strings[span[1]],
+              resource: strings[span[2]],
+              trace_id: span[3],
+              span_id: span[4],
+              parent_id: span[5],
+              start: span[6],
+              duration: span[7],
+              error: span[8],
+              meta,
+              metrics,
+              type: strings[span[11]]
+            }
+
+            return span
+          })
+        })
+      })
+    })
     app.post('/profiling/v1/input', upload.any(), (req, res) => {
       res.status(200).send()
       this.emit('message', {

packages/datadog-plugin-express/test/index.spec.js

@@ -1471,13 +1471,13 @@ describe('Plugin', () => {
       })
 
       describe('with configuration for middleware disabled', () => {
-        before(() => {
+        beforeEach(() => {
           return agent.load(['express', 'http'], [{
             middleware: false
           }, { client: false }])
         })
 
-        after(() => {
+        afterEach(() => {
           return agent.close({ ritmReset: false })
         })