Usage in Deno
import { TracingChannel } from "node:diagnostics_channel";
TracingChannel.prototype.tracePromise<ThisArg = any,Args extends any[] = any[],>(fn: (this: ThisArg,...args: Args,) => Promise<any>,context?: ContextType,thisArg?: ThisArg,...args: Args,): void
Trace a promise-returning function call. This will always produce a start event
and end event
around the synchronous portion of the
function execution, and will produce an asyncStart event
and asyncEnd event
when a promise continuation is reached. It may also
produce an error event
if the given function throws an error or the
returned promise rejects. This will run the given function using channel.runStores(context, ...)
on the start
channel which ensures all
events should have any bound stores set to match this trace context.
To ensure only correct trace graphs are formed, events will only be published if subscribers are present prior to starting the trace. Subscriptions which are added after the trace begins will not receive future events from that trace, only future traces will be seen.
import diagnostics_channel from 'node:diagnostics_channel'; const channels = diagnostics_channel.tracingChannel('my-channel'); channels.tracePromise(async () => { // Do something }, { some: 'thing', });
void
Chained from promise returned by the given function