Initial commit

node_modules/neo4j-driver/lib/v1/internal/rediscovery.js

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