%PDF-
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Mini Shell
Mini Shell
"use strict";
Object.defineProperty(exports, "__esModule", {
value: true
});
exports.flushAllTraces = exports.trace = exports.SpanStatus = void 0;
var _report = require("./report");
const NUM_OF_MICROSEC_IN_NANOSEC = BigInt("1000");
let count = 0;
const getId = ()=>{
count++;
return count;
};
var SpanStatus;
exports.SpanStatus = SpanStatus;
(function(SpanStatus) {
SpanStatus[SpanStatus["Started"] = 0] = "Started";
SpanStatus[SpanStatus["Stopped"] = 1] = "Stopped";
})(SpanStatus || (exports.SpanStatus = SpanStatus = {}));
class Span {
constructor({ name , parentId , attrs , startTime }){
this.name = name;
this.parentId = parentId;
this.duration = null;
this.attrs = attrs ? {
...attrs
} : {};
this.status = 0;
this.id = getId();
this._start = startTime || process.hrtime.bigint();
// hrtime cannot be used to reconstruct tracing span's actual start time
// since it does not have relation to clock time:
// `These times are relative to an arbitrary time in the past, and not related to the time of day and therefore not subject to clock drift`
// https://nodejs.org/api/process.html#processhrtimetime
// Capturing current datetime as additional metadata for external reconstruction.
this.now = Date.now();
}
// 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(stopTime) {
const end = stopTime || process.hrtime.bigint();
const duration = (end - this._start) / NUM_OF_MICROSEC_IN_NANOSEC;
this.status = 1;
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_NANOSEC;
_report.reporter.report(this.name, Number(duration), Number(timestamp), this.id, this.parentId, this.attrs, this.now);
}
traceChild(name, attrs) {
return new Span({
name,
parentId: this.id,
attrs
});
}
manualTraceChild(name, startTime, stopTime, attrs) {
const span = new Span({
name,
parentId: this.id,
attrs,
startTime
});
span.stop(stopTime);
}
setAttribute(key, value) {
this.attrs[key] = String(value);
}
traceFn(fn) {
try {
return fn();
} finally{
this.stop();
}
}
async traceAsyncFn(fn) {
try {
return await fn();
} finally{
this.stop();
}
}
}
exports.Span = Span;
const trace = (name, parentId, attrs)=>{
return new Span({
name,
parentId,
attrs
});
};
exports.trace = trace;
const flushAllTraces = ()=>_report.reporter.flushAll();
exports.flushAllTraces = flushAllTraces;
//# sourceMappingURL=trace.js.map
Zerion Mini Shell 1.0