joola.io.engine/lib/connectors/connector.js

/**
 *  joola.io
 *
 *  Copyright Joola Smart Solutions, Ltd. <info@joo.la>
 *
 *  Licensed under GNU General Public License 3.0 or later.
 *  Some rights reserved. See LICENSE, AUTHORS.
 *
 *  @license GPL-3.0+ <http://spdx.org/licenses/GPL-3.0+>
 */

var
  uuid = require('node-uuid'),
  mysql = require('./mysql'),
  mssql = require('./mssql'),
  pg = require('./postgres');

var createConnection = function (query) {
  var connection = null;
  switch (query.datasource.type) {
    case 'mysql':
      joola.logger.debug('open connection to mysql ' + query.datasource.id);
      connection = mysql;
      break;
    case 'postgres':
      joola.logger.debug('open connection to postgres ' + query.datasource.id);
      connection = pg;
      break;
    case 'mssql':
      joola.logger.debug('open connection to mssql ' + query.datasource.id);
      connection = mssql;
      break;
    default:
      break;
  }

  return connection;
};

var exports = {};

exports.createQuery = function () {
  var query = {
    _id: null,
    id: function () {
      if (!this._id)
        this.id = uuid.v4();
      return this.id;
    }(),
    datasource: null,
    options: null,
    type: "read",
    sql: "",
    limit: null
  };
  return ce.extend(query, {});
};

exports.executeQuery = function (query, callback) {
  var db = createConnection(query);
  //var connection = db.open(query);

  joola.logger.silly('Execute query... [' + query.datasource.id + ']: ' + query.sql);
  db.executeQuery(query, function (err, rows, fields) {
    if (err)
      return callback(null, null, null, err);
    joola.logger.silly('Result contains ' + rows.rows.length + ' rows and ' + rows.fields.length + ' fields.');
    return callback(query, rows, fields, err);
  });
  //db.close(connection);
};

module.exports = exports;