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https://github.com/badlogic/pi-mono.git
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d9025a5f5e
- pi-telemetry: StoredSpan/StoredTrace/TelemetryStore (findTraces with name, attribute, error, time-window filters and cursor paging; getTrace; findMetrics), trace ids carried in carriers, renderTrace in the /render subpath; the in-memory adapter implements the store; the adapter contract trusts typed inputs (malformed-input conformance cases removed) - chord: @earendil-works/chord/telemetry-sqlite over chord/sqlite: settled spans with inline events and links, metrics aggregated per series per 10 s, 1 s batched flush with retention, bounded queue (dropped and counted), store queries
37 lines
1.5 KiB
TypeScript
37 lines
1.5 KiB
TypeScript
import type { SpanOptions, TelemetryPropagation, TelemetrySpan } from "./index.ts";
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import type { TelemetryCounter, TelemetryHistogram, TelemetryMetrics, TelemetryUpDownCounter } from "./metrics.ts";
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async function startNoopSpan<T>(_options: SpanOptions, callback: (span: TelemetrySpan) => T | Promise<T>): Promise<T> {
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return callback(noopTelemetrySpan);
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}
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const noopCounter: TelemetryCounter = Object.freeze({ add: () => {} });
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const noopUpDownCounter: TelemetryUpDownCounter = Object.freeze({ add: () => {} });
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const noopHistogram: TelemetryHistogram = Object.freeze({ record: () => {} });
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/** Shared instruments that never inspect or retain metadata, measurements, or contexts. */
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export const NOOP_TELEMETRY_METRICS: TelemetryMetrics = Object.freeze({
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counter: () => noopCounter,
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upDownCounter: () => noopUpDownCounter,
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histogram: () => noopHistogram,
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});
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/** Shared propagation capability that neither inspects nor retains its inputs. */
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export const NOOP_TELEMETRY_PROPAGATION: TelemetryPropagation = Object.freeze({
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inject: () => undefined,
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extract: () => NOOP_TELEMETRY_CONTEXT,
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});
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const noopTelemetrySpan: TelemetrySpan = {
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metrics: NOOP_TELEMETRY_METRICS,
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propagation: NOOP_TELEMETRY_PROPAGATION,
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startSpan: startNoopSpan,
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addLink: () => {},
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addEvent: () => {},
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setAttributes: () => {},
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setStatus: () => {},
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};
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Object.freeze(noopTelemetrySpan);
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/** Shared telemetry context used when an application does not provide one. */
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export const NOOP_TELEMETRY_CONTEXT: TelemetrySpan = noopTelemetrySpan;
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