Method runSingleFlight

server/modules/runtimeCache.js:780–793

(key, factory)

  }

  runSingleFlight(key, factory) {
    if (this.inFlight.has(key)) {
      return this.inFlight.get(key);
    }

    const promise = Promise.resolve()
      .then(factory)
      .finally(() => {
        this.inFlight.delete(key);
      });

    this.inFlight.set(key, promise);
    return promise;
  }

  triggerBackgroundRefresh(key, factory) {
    if (this.inFlight.has(key)) {