@sentry/core/esm/tracing/logSpans.js

Base implementation for all Sentry JavaScript SDKs

import { logger } from '@sentry/utils';
import { DEBUG_BUILD } from '../debug-build.js';
import { spanToJSON, spanIsSampled, getRootSpan } from '../utils/spanUtils.js';

/**
 * Print a log message for a started span.
 */
function logSpanStart(span) {
  if (!DEBUG_BUILD) return;

  const { description = '< unknown name >', op = '< unknown op >', parent_span_id: parentSpanId } = spanToJSON(span);
  const { spanId } = span.spanContext();

  const sampled = spanIsSampled(span);
  const rootSpan = getRootSpan(span);
  const isRootSpan = rootSpan === span;

  const header = `[Tracing] Starting ${sampled ? 'sampled' : 'unsampled'} ${isRootSpan ? 'root ' : ''}span`;

  const infoParts = [`op: ${op}`, `name: ${description}`, `ID: ${spanId}`];

  if (parentSpanId) {
    infoParts.push(`parent ID: ${parentSpanId}`);
  }

  if (!isRootSpan) {
    const { op, description } = spanToJSON(rootSpan);
    infoParts.push(`root ID: ${rootSpan.spanContext().spanId}`);
    if (op) {
      infoParts.push(`root op: ${op}`);
    }
    if (description) {
      infoParts.push(`root description: ${description}`);
    }
  }

  logger.log(`${header}
  ${infoParts.join('\n  ')}`);
}

/**
 * Print a log message for an ended span.
 */
function logSpanEnd(span) {
  if (!DEBUG_BUILD) return;

  const { description = '< unknown name >', op = '< unknown op >' } = spanToJSON(span);
  const { spanId } = span.spanContext();
  const rootSpan = getRootSpan(span);
  const isRootSpan = rootSpan === span;

  const msg = `[Tracing] Finishing "${op}" ${isRootSpan ? 'root ' : ''}span "${description}" with ID ${spanId}`;
  logger.log(msg);
}

export { logSpanEnd, logSpanStart };
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