45 lines
1.1 KiB
JavaScript
45 lines
1.1 KiB
JavaScript
'use strict';
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const {
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hrTimeToMilliseconds,
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//hrTimeToMicroseconds
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} = require('@opentelemetry/core');
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const SAFE_ATTRIBUTES = ['http.method', 'http.url', 'http.status_code', 'http.target'];
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// Convert a `Span` object to a plain old JavaScript object with only the info
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// we care about and that is safe to share. We want something we can JSON
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// serialize.
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function serializeSpan(span) {
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const spanContext = span.spanContext();
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const safeAttributes = {};
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SAFE_ATTRIBUTES.forEach((safeAttribute) => {
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safeAttributes[safeAttribute] = span.attributes[safeAttribute];
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});
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const startTimeInMs = hrTimeToMilliseconds(span.startTime);
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const endTimeInMs = hrTimeToMilliseconds(span.endTime);
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let durationInMs = null;
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if (startTimeInMs && endTimeInMs) {
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durationInMs = endTimeInMs - startTimeInMs;
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}
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return {
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name: span.name,
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spanContext: {
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traceId: spanContext.traceId,
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spanId: spanContext.spanId,
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},
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//parentSpanId: span.parentSpanId,
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startTimeInMs,
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endTimeInMs,
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durationInMs,
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attributes: safeAttributes,
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//span.links
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};
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}
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module.exports = serializeSpan;
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