2 * Copyright 2014 Facebook, Inc.
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
19 #include <folly/experimental/wangle/rx/Observable.h>
20 #include <folly/experimental/wangle/rx/Observer.h>
22 namespace folly { namespace wangle {
24 /// Subject interface. A Subject is both an Observable and an Observer. There
25 /// is a default implementation of the Observer methods that just forwards the
26 /// observed events to the Subject's observers.
28 struct Subject : public Observable<T>, public Observer<T> {
29 typedef typename Observable<T>::ObserversGuard ObserversGuard;
30 void onNext(T val) override {
31 ObserversGuard guard(this);
32 for (auto& kv : Observable<T>::getObservers()) {
33 kv.second->onNext(val);
36 void onError(Error e) override {
37 ObserversGuard guard(this);
38 for (auto& kv : Observable<T>::getObservers()) {
39 kv.second->onError(e);
42 void onCompleted() override {
43 ObserversGuard guard(this);
44 for (auto& kv : Observable<T>::getObservers()) {
45 kv.second->onCompleted();