109 lines
3.8 KiB
JavaScript
109 lines
3.8 KiB
JavaScript
'use strict';
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Object.defineProperty(exports, "__esModule", {
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value: true
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});
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var _stringify = require('babel-runtime/core-js/json/stringify');
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var _stringify2 = _interopRequireDefault(_stringify);
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var _classCallCheck2 = require('babel-runtime/helpers/classCallCheck');
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var _classCallCheck3 = _interopRequireDefault(_classCallCheck2);
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var _createClass2 = require('babel-runtime/helpers/createClass');
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var _createClass3 = _interopRequireDefault(_createClass2);
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var _routingTable = require('./routing-table');
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var _routingTable2 = _interopRequireDefault(_routingTable);
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var _error = require('../error');
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function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
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/**
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* Copyright (c) 2002-2018 "Neo4j,"
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* Neo4j Sweden AB [http://neo4j.com]
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*
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* This file is part of Neo4j.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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var Rediscovery = function () {
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/**
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* @constructor
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* @param {RoutingUtil} routingUtil the util to use.
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*/
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function Rediscovery(routingUtil) {
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(0, _classCallCheck3.default)(this, Rediscovery);
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this._routingUtil = routingUtil;
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}
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/**
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* Try to fetch new routing table from the given router.
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* @param {Session} session the session to use.
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* @param {string} routerAddress the URL of the router.
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* @return {Promise<RoutingTable>} promise resolved with new routing table or null when connection error happened.
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*/
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(0, _createClass3.default)(Rediscovery, [{
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key: 'lookupRoutingTableOnRouter',
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value: function lookupRoutingTableOnRouter(session, routerAddress) {
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var _this = this;
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return this._routingUtil.callRoutingProcedure(session, routerAddress).then(function (records) {
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if (records === null) {
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// connection error happened, unable to retrieve routing table from this router, next one should be queried
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return null;
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}
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if (records.length !== 1) {
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throw (0, _error.newError)('Illegal response from router "' + routerAddress + '". ' + 'Received ' + records.length + ' records but expected only one.\n' + (0, _stringify2.default)(records), _error.PROTOCOL_ERROR);
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}
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var record = records[0];
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var expirationTime = _this._routingUtil.parseTtl(record, routerAddress);
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var _routingUtil$parseSer = _this._routingUtil.parseServers(record, routerAddress),
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routers = _routingUtil$parseSer.routers,
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readers = _routingUtil$parseSer.readers,
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writers = _routingUtil$parseSer.writers;
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Rediscovery._assertNonEmpty(routers, 'routers', routerAddress);
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Rediscovery._assertNonEmpty(readers, 'readers', routerAddress);
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// case with no writers is processed higher in the promise chain because only RoutingDriver knows
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// how to deal with such table and how to treat router that returned such table
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return new _routingTable2.default(routers, readers, writers, expirationTime);
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});
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}
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}], [{
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key: '_assertNonEmpty',
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value: function _assertNonEmpty(serverAddressesArray, serversName, routerAddress) {
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if (serverAddressesArray.length === 0) {
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throw (0, _error.newError)('Received no ' + serversName + ' from router ' + routerAddress, _error.PROTOCOL_ERROR);
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}
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}
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}]);
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return Rediscovery;
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}();
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exports.default = Rediscovery; |