| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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. |
| */ |
| import {Observable} from "rxjs/Observable"; |
| import "rxjs/add/observable/interval"; |
| import "rxjs/add/operator/exhaust"; |
| import "rxjs/add/operator/mapTo"; |
| import "rxjs/add/operator/share"; |
| |
| const OBSERVER_CACHE = new Map(); |
| const OBSERVABLE = 'observable'; |
| |
| export function apiObserverInterceptorProvider() { |
| let interval = 10000; |
| let clock = Observable.interval(10000); |
| |
| return { |
| interval: (value)=> { |
| interval = value; |
| clock = Observable.interval(interval); |
| }, |
| $get: ['$injector', '$q', ($injector, $q)=> { |
| return { |
| response: (response)=> { |
| doDriveBy(response); |
| return response; |
| }, |
| responseError: (rejection)=> { |
| doDriveBy(rejection, true); |
| return $q.reject(rejection); |
| } |
| }; |
| |
| function doDriveBy(response, error = false) { |
| if (response.config.hasOwnProperty(OBSERVABLE) && response.config[OBSERVABLE]) { |
| response.subscribe = (next, error, complete)=> { |
| if (!OBSERVER_CACHE.has(response.config.url)) { |
| OBSERVER_CACHE.set(response.config.url, clock.mapTo(coldObservableFactory(response.config)).exhaust().share()); |
| } |
| return OBSERVER_CACHE.get(response.config.url).subscribe(next, error, complete); |
| } |
| } |
| } |
| |
| function coldObservableFactory(httpConfig) { |
| return Observable.create((observer)=> { |
| let $http = $injector.get('$http'); |
| $http(Object.assign(httpConfig, {observable: false, cache: null})) |
| .then((response)=> { |
| observer.next(response); |
| observer.complete(); |
| }, (error)=> { |
| observer.error(error); |
| observer.complete(); |
| }); |
| }); |
| } |
| }] |
| }; |
| } |