Method prepareAllQueries

lib/prepare-handler.js:208–233

* Prepares all queries on a single host. * @param {Host} host * @param {Array} allPrepared

(host, allPrepared)

   * @param {Array} allPrepared
   */
  static async prepareAllQueries(host, allPrepared) {
    const anyKeyspaceQueries = [];

    const queriesByKeyspace = new Map();
    allPrepared.forEach(info => {
      let arr;
      if (info.keyspace) {
        arr = queriesByKeyspace.get(info.keyspace);

        if (!arr) {
          arr = [];
          queriesByKeyspace.set(info.keyspace, arr);
        }
      } else {
        arr = anyKeyspaceQueries;
      }

      arr.push(info.query);
    });

    for (const [keyspace, queries] of queriesByKeyspace) {
      await PrepareHandler._borrowAndPrepare(host, keyspace, queries);
    }

    await PrepareHandler._borrowAndPrepare(host, null, anyKeyspaceQueries);
  }

  /**
   * Borrows a connection from the host and prepares the queries provided.