Function withLock

src/cmap/auth/mongodb_oidc/callback_workflow.ts:156–176

* Ensure the callback is only executed one at a time and throttles the calls * to every 100ms.

(callback: OIDCCallbackFunction)

   * to every 100ms.
   */
  protected withLock(callback: OIDCCallbackFunction): OIDCCallbackFunction {
    let lock: Promise<any> = Promise.resolve();
    return async (params: OIDCCallbackParams): Promise<OIDCResponse> => {
      // We do this to ensure that we would never return the result of the
      // previous lock, only the current callback's value would get returned.
      await lock;
      lock = lock

        .catch(() => null)

        .then(async () => {
          const difference = Date.now() - this.lastExecutionTime;
          if (difference <= THROTTLE_MS) {
            await setTimeout(THROTTLE_MS - difference, { signal: params.timeoutContext });
          }
          this.lastExecutionTime = Date.now();
          return await callback(params);
        });
      return await lock;
    };
  }
}

/**