Method getPrepared

lib/prepare-handler.js:52–65

* Gets the query id and metadata for a prepared statement, preparing it on * single host or on all hosts depending on the options. * @param {Client} client * @param {LoadBalancingPolicy} loadBalancing * @param {String} query * @param {String} keyspace * @returns {Promise<{queryId,

(client, loadBalancing, query, keyspace)

   * @static
   */
  static async getPrepared(client, loadBalancing, query, keyspace) {
    const info = client.metadata.getPreparedInfo(keyspace, query);
    if (info.queryId) {
      return info;
    }

    if (info.preparing) {
      // It's already being prepared
      return await promiseUtils.fromEvent(info, 'prepared');
    }

    const instance = new PrepareHandler(client, loadBalancing);
    return await instance._prepare(info, query, keyspace);
  }

  /**
   * @param {Client} client