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class="source-code line-number raw-source-code"><code class="prettyprint linenums" data-ice="content">import { OuterSubscriber } from '../OuterSubscriber'; import { subscribeToResult } from '../util/subscribeToResult'; /** * Converts a higher-order Observable into a first-order Observable which * concurrently delivers all values that are emitted on the inner Observables. * * <span class="informal">Flattens an Observable-of-Observables.</span> * * <img src="./img/mergeAll.png" width="100%"> * * `mergeAll` subscribes to an Observable that emits Observables, also known as * a higher-order Observable. Each time it observes one of these emitted inner * Observables, it subscribes to that and delivers all the values from the * inner Observable on the output Observable. The output Observable only * completes once all inner Observables have completed. Any error delivered by * a inner Observable will be immediately emitted on the output Observable. * * @example <caption>Spawn a new interval Observable for each click event, and blend their outputs as one Observable</caption> * var clicks = Rx.Observable.fromEvent(document, 'click'); * var higherOrder = clicks.map((ev) => Rx.Observable.interval(1000)); * var firstOrder = higherOrder.mergeAll(); * firstOrder.subscribe(x => console.log(x)); * * @example <caption>Count from 0 to 9 every second for each click, but only allow 2 concurrent timers</caption> * var clicks = Rx.Observable.fromEvent(document, 'click'); * var higherOrder = clicks.map((ev) => Rx.Observable.interval(1000).take(10)); * var firstOrder = higherOrder.mergeAll(2); * firstOrder.subscribe(x => console.log(x)); * * @see {@link combineAll} * @see {@link concatAll} * @see {@link exhaust} * @see {@link merge} * @see {@link mergeMap} * @see {@link mergeMapTo} * @see {@link mergeScan} * @see {@link switch} * @see {@link zipAll} * * @param {number} [concurrent=Number.POSITIVE_INFINITY] Maximum number of inner * Observables being subscribed to concurrently. * @return {Observable} An Observable that emits values coming from all the * inner Observables emitted by the source Observable. * @method mergeAll * @owner Observable */ export function mergeAll(concurrent) { if (concurrent === void 0) { concurrent = Number.POSITIVE_INFINITY; } return this.lift(new MergeAllOperator(concurrent)); } export var MergeAllOperator = (function () { function MergeAllOperator(concurrent) { this.concurrent = concurrent; } MergeAllOperator.prototype.call = function (observer, source) { return source._subscribe(new MergeAllSubscriber(observer, this.concurrent)); }; return MergeAllOperator; }()); /** * We need this JSDoc comment for affecting ESDoc. * @ignore * @extends {Ignored} */ export var MergeAllSubscriber = (function (_super) { __extends(MergeAllSubscriber, _super); function MergeAllSubscriber(destination, concurrent) { _super.call(this, destination); this.concurrent = concurrent; this.hasCompleted = false; this.buffer = []; this.active = 0; } MergeAllSubscriber.prototype._next = function (observable) { if (this.active < this.concurrent) { this.active++; this.add(subscribeToResult(this, observable)); } else { this.buffer.push(observable); } }; MergeAllSubscriber.prototype._complete = function () { this.hasCompleted = true; if (this.active === 0 && this.buffer.length === 0) { this.destination.complete(); } }; MergeAllSubscriber.prototype.notifyComplete = function (innerSub) { var buffer = this.buffer; this.remove(innerSub); this.active--; if (buffer.length > 0) { this._next(buffer.shift()); } else if (this.active === 0 && this.hasCompleted) { this.destination.complete(); } }; return MergeAllSubscriber; }(OuterSubscriber)); //# sourceMappingURL=mergeAll.js.map</code></pre> </div> <footer class="footer"> Generated by <a href="https://esdoc.org">ESDoc<span data-ice="esdocVersion">(0.4.8)</span></a> </footer> <script src="script/search_index.js"></script> <script src="script/search.js"></script> <script src="script/pretty-print.js"></script> <script src="script/inherited-summary.js"></script> <script src="script/test-summary.js"></script> <script src="script/inner-link.js"></script> <script src="script/patch-for-local.js"></script> </body> </html>