function Transaction()

in lib/instrumentation/transaction.js [47:111]
56 lines of code
14 McCabe index (conditional complexity)

function Transaction(agent, name, ...args) {
  const opts =
    typeof args[args.length - 1] === 'object' ? args.pop() || {} : {};

  if (opts.timer) {
    // Before 4.x this option could be passed in. It was never publicly documented.
    delete opts.timer;
  }
  if (opts.tracestate) {
    opts.tracestate = TraceState.fromStringFormatString(opts.tracestate);
  }

  if (opts.childOf) {
    // Possibly restart the trace, depending on `traceContinuationStrategy`.
    // Spec: https://github.com/elastic/apm/blob/main/specs/agents/trace-continuation.md
    let traceContinuationStrategy = agent._conf.traceContinuationStrategy;
    if (
      traceContinuationStrategy === TRACE_CONTINUATION_STRATEGY_RESTART_EXTERNAL
    ) {
      traceContinuationStrategy = TRACE_CONTINUATION_STRATEGY_RESTART;
      if (opts.tracestate && opts.tracestate.toMap().has('es')) {
        traceContinuationStrategy = TRACE_CONTINUATION_STRATEGY_CONTINUE;
      }
    }
    if (traceContinuationStrategy === TRACE_CONTINUATION_STRATEGY_RESTART) {
      if (!opts.links || !Array.isArray(opts.links)) {
        opts.links = [];
      }
      opts.links.push({ context: opts.childOf });
      delete opts.childOf; // restart the trace
      delete opts.tracestate;
    }
  }

  this.type = null;
  this.setType(...args);

  GenericSpan.call(this, agent, opts);

  const verb = this.parentId ? 'continue' : 'start';
  agent.logger.debug('%s trace %o', verb, {
    trans: this.id,
    parent: this.parentId,
    trace: this.traceId,
    sampled: this.sampled,
    name: this.name,
    type: this.type,
    traceparent: this.traceparent,
  });

  this._defaultName = name || '';
  this._customName = '';
  this._user = null;
  this._custom = null;
  this._result = constants.RESULT_SUCCESS;
  this._builtSpans = 0;
  this._droppedSpans = 0;
  this._breakdownTimings = new ObjectIdentityMap();
  this._faas = undefined;
  this._service = undefined;
  this._message = undefined;
  this._cloud = undefined;
  this._droppedSpansStats = new DroppedSpansStats();
  this.outcome = constants.OUTCOME_UNKNOWN;
}