/
tracer.ts
72 lines (63 loc) · 1.63 KB
/
tracer.ts
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import api, { Span } from '@opentelemetry/api'
export const tracer = api.trace.getTracer('next', process.env.__NEXT_VERSION)
const compilerStacks = new WeakMap()
export function stackPush(compiler: any, spanName: string, attrs?: any): any {
let stack = compilerStacks.get(compiler)
let span
if (!stack) {
compilerStacks.set(compiler, (stack = []))
span = tracer.startSpan(spanName, attrs)
} else {
const parent = stack[stack.length - 1]
tracer.withSpan(parent, () => {
span = tracer.startSpan(spanName, attrs)
})
}
stack.push(span)
return span
}
export function stackPop(compiler: any, span: any) {
span.end()
let stack = compilerStacks.get(compiler)
if (!stack) {
console.warn(
'Attempted to pop from non-existent stack. Compiler reference must be bad.'
)
return
}
const poppedSpan = stack.pop()
if (poppedSpan !== span) {
stack.push(poppedSpan)
const spanIdx = stack.indexOf(span)
console.warn('Attempted to pop span that was not at top of stack.')
if (spanIdx !== -1) {
console.info(
`Span was found at index ${spanIdx} with stack size ${stack.length}`
)
}
}
}
export function traceFn<T extends (...args: unknown[]) => ReturnType<T>>(
span: Span,
fn: T
): ReturnType<T> {
return tracer.withSpan(span, () => {
try {
return fn()
} finally {
span.end()
}
})
}
export function traceAsyncFn<T extends (...args: unknown[]) => ReturnType<T>>(
span: Span,
fn: T
): Promise<ReturnType<T>> {
return tracer.withSpan(span, async () => {
try {
return await fn()
} finally {
span.end()
}
})
}