3a78ccd43f
Will send events like this:
```
[telemetry] {
"eventName": "NEXT_TYPE_CHECK_COMPLETED",
"payload": {
"durationInSeconds": 2,
"typescriptVersion": "3.8.3",
"inputFilesCount": 16,
"totalFilesCount": 289,
"incremental": false
}
}
```
## Bug
- [ ] Related issues linked using `fixes #number`
- [ ] Integration tests added
## Feature
- [ ] Implements an existing feature request or RFC. Make sure the feature request has been accepted for implementation before opening a PR.
- [ ] Related issues linked using `fixes #number`
- [ ] Integration tests added
- [ ] Documentation added
- [ ] Telemetry added. In case of a feature if it's used or not.
## Documentation / Examples
- [ ] Make sure the linting passes
85 lines
2 KiB
TypeScript
85 lines
2 KiB
TypeScript
import { randomBytes } from 'crypto'
|
|
import { SpanId } from './shared'
|
|
import { report } from './report'
|
|
|
|
const NUM_OF_MICROSEC_IN_SEC = BigInt('1000')
|
|
|
|
const getId = () => randomBytes(8).toString('hex')
|
|
|
|
// eslint typescript has a bug with TS enums
|
|
/* eslint-disable no-shadow */
|
|
export enum SpanStatus {
|
|
Started,
|
|
Stopped,
|
|
}
|
|
|
|
export class Span {
|
|
name: string
|
|
id: SpanId
|
|
parentId?: SpanId
|
|
duration: number | null
|
|
attrs: { [key: string]: any }
|
|
status: SpanStatus
|
|
|
|
_start: bigint
|
|
|
|
constructor(name: string, parentId?: SpanId, attrs?: Object) {
|
|
this.name = name
|
|
this.parentId = parentId
|
|
this.duration = null
|
|
this.attrs = attrs ? { ...attrs } : {}
|
|
this.status = SpanStatus.Started
|
|
this.id = getId()
|
|
this._start = process.hrtime.bigint()
|
|
}
|
|
|
|
// Durations are reported as microseconds. This gives 1000x the precision
|
|
// of something like Date.now(), which reports in milliseconds.
|
|
// Additionally, ~285 years can be safely represented as microseconds as
|
|
// a float64 in both JSON and JavaScript.
|
|
stop() {
|
|
const end: bigint = process.hrtime.bigint()
|
|
const duration = (end - this._start) / NUM_OF_MICROSEC_IN_SEC
|
|
this.status = SpanStatus.Stopped
|
|
if (duration > Number.MAX_SAFE_INTEGER) {
|
|
throw new Error(`Duration is too long to express as float64: ${duration}`)
|
|
}
|
|
const timestamp = this._start / NUM_OF_MICROSEC_IN_SEC
|
|
report(
|
|
this.name,
|
|
Number(duration),
|
|
Number(timestamp),
|
|
this.id,
|
|
this.parentId,
|
|
this.attrs
|
|
)
|
|
}
|
|
|
|
traceChild(name: string, attrs?: Object) {
|
|
return new Span(name, this.id, attrs)
|
|
}
|
|
|
|
setAttribute(key: string, value: any) {
|
|
this.attrs[key] = value
|
|
}
|
|
|
|
traceFn(fn: any) {
|
|
try {
|
|
return fn()
|
|
} finally {
|
|
this.stop()
|
|
}
|
|
}
|
|
|
|
async traceAsyncFn<T>(fn: () => T | Promise<T>): Promise<T> {
|
|
try {
|
|
return await fn()
|
|
} finally {
|
|
this.stop()
|
|
}
|
|
}
|
|
}
|
|
|
|
export const trace = (name: string, parentId?: SpanId, attrs?: Object) => {
|
|
return new Span(name, parentId, attrs)
|
|
}
|