Method getExperimentValue

src/node/services/experimentsService.ts:177–205

(experimentId: ExperimentId)

  }

  getExperimentValue(experimentId: ExperimentId): ExperimentValue {
    assert(experimentId in EXPERIMENTS, `Unknown experimentId: ${experimentId}`);

    if (!this.isExperimentSupported(experimentId)) {
      return { value: null, source: "disabled" };
    }

    const override = this.overrides.get(experimentId);
    if (override !== undefined) {
      if (this.isRemoteEvaluationEnabled()) {
        this.maybeRefreshInBackground(experimentId);
      }
      return { value: override, source: "override" };
    }

    if (!this.isRemoteEvaluationEnabled()) {
      return { value: null, source: "disabled" };
    }

    const cached = this.cachedVariants.get(experimentId);
    if (!cached) {
      // No cached value yet. Fail closed, but kick off a background refresh.
      this.maybeRefreshInBackground(experimentId);
      return { value: null, source: "cache" };
    }

    this.maybeRefreshInBackground(experimentId);
    return { value: cached.value, source: cached.source };
  }

  /**
   * Convert an experiment assignment to a boolean gate.