无法创建具有承诺的节点池集群

Question

我正在尝试在节点promise中创建与雪花数据库的连接。

var NodePoolCluster = require('node-pool-cluster');
var snowflake = require('snowflake-sdk');
init() {

    this.nodePoolCluster = NodePoolCluster.initCluster({
      name: poolName,
      destroy: function (connection) {
        connection.destroy(function (err, connection) {
          if (err) {
            log.error('Unable to disconnect from connection with id: ' + connection.getId() +
              '. Message is: ' + err.message);
          } else {
            log.info('Disconnected connection with id: ' + connection.getId());
          }
        });
      },
      max: maxConnection,
      min: minConnection,
      idleTimeoutMillis: idleTimeoutMillis
    });
    var poolCluster = this.nodePoolCluster;
    return new Promise(function (fulfill, reject) {
      console.log("creating pool");
      poolCluster.addPool(function (callback) {
        console.log("adding pool");
        var connection = snowflake.createConnection({
          account: snowflakeAccountID,
          username: snowflakeUsername,
          password: snowflakePassword,
          database: snowflakeDatabase,
          schema: snowflakeSchema,
          warehouse: snowflakeWarehouse,
          role: snowflakeRole
        });
        console.log("connecting to snowflake");
        connection.connect(function (err, conn) {
          console.log("Inside create connection");
          if (err) {
            log.error('Unable to connect: ' + err.message);
            reject(new Error(err));
            return;
          } else {
            log.info('Successfully connected as id: ' + connection.getId());
            fulfill(callback(err, connection));
          }
        });
      });
    });
  }

这是承诺电话。

var snowFlakePromise = snowflakeObject.init();
      snowFlakePromise.then(function () {
        console.log(connection created);

      }, function (onReject) {
        console.log("connection rejected" + onReject.message);
      });

这里我在“创建池”后没有得到任何东西，它无法将池添加到集群中。 它的工作正常，没有承诺，但承诺它会产生问题。

没有承诺init（）函数就像

init() {
    this.nodePoolCluster = NodePoolCluster.initCluster({
      name: poolName,
      destroy: function (connection) {
        connection.destroy(function (err, connection) {
          if (err) {
            log.error('Unable to disconnect from connection with id: ' + connection.getId() +
              '. Message is: ' + err.message);
          } else {
            log.info('Disconnected connection with id: ' + connection.getId());
          }
        });
      },
      max: maxConnection,
      min: minConnection,
      idleTimeoutMillis: idleTimeoutMillis
    });

    this.nodePoolCluster.addPool(function (callback) {

      var connection = snowflake.createConnection({
        account: snowflakeAccountID,
        username: snowflakeUsername,
        password: snowflakePassword,
        database: snowflakeDatabase,
        schema: snowflakeSchema,
        warehouse: snowflakeWarehouse,
        role: snowflakeRole
      });

      connection.connect(function (err, conn) {
        if (err) {
          log.error('Unable to connect: ' + err.message);
        } else {
          log.info('Successfully connected as id: ' + connection.getId());
          callback(err, connection);
        }
      });
    });
  }