Method _setIdleTimeout

lib/connection.js:581–594

()

  }

  _setIdleTimeout() {
    if (!this.options.pooling.heartBeatInterval) {
      return;
    }
    const self = this;
    // Scheduling the new timeout before de-scheduling the previous performs significantly better
    // than de-scheduling first, see nodejs implementation: https://github.com/nodejs/node/blob/master/lib/timers.js
    const previousTimeout = this._idleTimeout;
    self._idleTimeout = setTimeout(() => self._idleTimeoutHandler(), self.options.pooling.heartBeatInterval);
    if (previousTimeout) {
      //remove the previous timeout for the idle request
      clearTimeout(previousTimeout);
    }
  }

  /**
   * Function that gets executed once the idle timeout has passed to issue a request to keep the connection alive