Method refreshExperimentImpl

src/node/services/experimentsService.ts:264–296

(experimentId: ExperimentId)

  }

  private async refreshExperimentImpl(experimentId: ExperimentId): Promise<void> {
    const client = this.telemetryService.getPostHogClient();
    const distinctId = this.telemetryService.getDistinctId();
    assert(client, "PostHog client must exist when remote evaluation is enabled");
    assert(distinctId, "distinctId must exist when remote evaluation is enabled");

    const flagKey = this.getFlagKey(experimentId);

    try {
      const value = await client.getFeatureFlag(flagKey, distinctId);
      if (typeof value !== "string" && typeof value !== "boolean") {
        return;
      }

      const cached: CachedVariant = {
        value,
        fetchedAtMs: Date.now(),
        source: "posthog",
      };

      this.cachedVariants.set(experimentId, cached);
      if (!this.overrides.has(experimentId)) {
        this.telemetryService.setFeatureFlagVariant(flagKey, value);
      }

      await this.writeCacheToDisk();
    } catch (error) {
      log.debug("Failed to refresh experiment from PostHog", {
        experimentId,
        error: getErrorMessage(error),
      });
    }
  }

  private maybeRefreshInBackground(experimentId: ExperimentId): void {
    if (!this.isExperimentSupported(experimentId)) {