public static void main(String[] args) {
Observable<String> lineInput =
Observable.create(
(Subscriber<? super String> subscriber) -> {
if (subscriber.isUnsubscribed()) return;
BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
String line = null;
try {
while (!subscriber.isUnsubscribed() && (line = reader.readLine()) != null) {
subscriber.onNext(line);
}
if (!subscriber.isUnsubscribed()) {
subscriber.onCompleted();
}
} catch (IOException e) {
subscriber.onError(e);
}
});
ConnectableObservable<String> sourceObs = lineInput.publish();
Function<Pattern, Observable<Integer>> lineParser =
(pattern) ->
sourceObs
.filter(
line -> {
return pattern.matcher(line).matches();
})
.map(
line -> {
return Integer.parseInt(line.substring(line.indexOf("=") + 1).trim());
});
Subscriber<Integer> whenUnsub =
new SafeSubscriber<Integer>(
new Subscriber<Integer>() {
@Override
public void onCompleted() {}
@Override
public void onError(Throwable throwable) {}
@Override
public void onNext(Integer s) {
System.out.println(s);
}
});
whenUnsub.add(
Subscriptions.create(
() -> {
System.out.println("unsubscribe callback");
}));
Observable.combineLatest(
lineParser.apply(Pattern.compile("^a.*")).startWith(0),
lineParser.apply(Pattern.compile("^b.*")).startWith(0),
(x, y) -> x + y)
.subscribe(whenUnsub);
sourceObs.connect();
}
