@loglayer/plugin-opentelemetry/dist/index.mjs

OpenTelemetry plugin for LogLayer that adds trace context to logs.

import { context, isSpanContextValid, trace } from "@opentelemetry/api";

//#region src/index.ts
function openTelemetryPlugin(config = {}) {
	const traceIdField = config.traceIdFieldName || "trace_id";
	const spanIdField = config.spanIdFieldName || "span_id";
	const traceFlagsField = config.traceFlagsFieldName || "trace_flags";
	const addTraceContext = (data) => {
		const span = trace.getSpan(context.active());
		if (span) {
			const spanContext = span.spanContext();
			if (isSpanContextValid(spanContext)) {
				const fields = {
					[traceIdField]: spanContext.traceId,
					[spanIdField]: spanContext.spanId,
					[traceFlagsField]: `0${spanContext.traceFlags.toString(16)}`
				};
				if (config.traceFieldName) {
					const traceData = { [config.traceFieldName]: fields };
					if (data) return {
						...data,
						...traceData
					};
					return traceData;
				}
				if (data) return {
					...data,
					...fields
				};
				return fields;
			}
		}
		return data || {};
	};
	return {
		id: config.id,
		disabled: config.disabled,
		onBeforeDataOut: ({ data }) => addTraceContext(data)
	};
}

//#endregion
export { openTelemetryPlugin };
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