@Test
public void testFlatMapTransformsException() {
Observable<Integer> onNext = Observable.from(Arrays.asList(1, 2, 3));
Observable<Integer> onCompleted = Observable.from(Arrays.asList(4));
Observable<Integer> onError = Observable.from(Arrays.asList(5));
Observable<Integer> source =
Observable.concat(
Observable.from(Arrays.asList(10, 20, 30)),
Observable.<Integer>error(new RuntimeException("Forced failure!")));
@SuppressWarnings("unchecked")
Observer<Object> o = mock(Observer.class);
source.flatMap(just(onNext), just(onError), just0(onCompleted)).subscribe(o);
verify(o, times(3)).onNext(1);
verify(o, times(3)).onNext(2);
verify(o, times(3)).onNext(3);
verify(o).onNext(5);
verify(o).onCompleted();
verify(o, never()).onNext(4);
verify(o, never()).onError(any(Throwable.class));
}
private Observable<Transaction> withTransactions(
Observable<? extends Product> productObservable) {
return productObservable
.flatMap(
p -> TransactionFixtures.randomTransactions(p.getCustomerId(), p, rn.nextInt(12) + 3))
.flatMap(transaction -> transactionService.createTransactionObservable(transaction))
.last();
}
private <T extends Aggregate> Observable<T> loadFromMongo(
final Class<T> aggregateClass, final JsonObject query) {
final Observable<T> newAggregate = makeNewAggregateOf(aggregateClass);
return newAggregate.flatMap(
aggregate ->
getPersistableEventList(query)
.flatMap(
persistableEvents -> {
persistableEvents.stream().forEach(applyEvent(aggregate));
return Observable.just(aggregate);
}));
}
@Override
public Observable<?> call(Observable<? extends Throwable> attempts) {
return attempts.flatMap(
new Func1<Throwable, Observable<?>>() {
@Override
public Observable<?> call(Throwable throwable) {
if (++retryCount < maxRetries) {
return Observable.timer(retryDelayMillis, TimeUnit.MILLISECONDS);
}
return Observable.error(throwable);
}
});
}
@Test
public void testFlatMapTransformsOnNextFuncThrows() {
Observable<Integer> onCompleted = Observable.from(Arrays.asList(4));
Observable<Integer> onError = Observable.from(Arrays.asList(5));
Observable<Integer> source = Observable.from(Arrays.asList(10, 20, 30));
@SuppressWarnings("unchecked")
Observer<Object> o = mock(Observer.class);
source.flatMap(funcThrow(1, onError), just(onError), just0(onCompleted)).subscribe(o);
verify(o).onError(any(TestException.class));
verify(o, never()).onNext(any());
verify(o, never()).onCompleted();
}
@Override
public void createInterface(
final UUID hostId,
final String name,
final MAC mac,
final int mtu,
final InetAddress[] addresses) {
Observable<StateKey> o = backend.stateStore().getKey(Host.class, hostId, HostKey());
o.flatMap(
new Func1<StateKey, Observable<StateResult>>() {
@Override
public Observable<StateResult> call(StateKey stateKey) {
SingleValueKey k = (SingleValueKey) stateKey;
State.HostState.Builder bldr = newBuilder();
if (k.value().nonEmpty()) {
try {
TextFormat.merge(k.value().get(), bldr);
} catch (Exception e) {
return Observable.error(e);
}
}
String hostState =
bldr.addInterfaces(
Interface.newBuilder()
.setName(name)
.setMac(mac.toString())
.setType(Interface.Type.PHYSICAL)
.setMtu(mtu)
.addAllAddresses(toIpAdresses(addresses))
.build())
.build()
.toString();
return backend.stateStore().addValue(Host.class, hostId, HostKey(), hostState);
}
})
.toBlocking()
.first();
}
@Test
public void testFlatMapTransformsMaxConcurrentNormal() {
final int m = 2;
final AtomicInteger subscriptionCount = new AtomicInteger();
Observable<Integer> onNext =
compose(
Observable.from(Arrays.asList(1, 2, 3)).observeOn(Schedulers.computation()),
subscriptionCount,
m)
.subscribeOn(Schedulers.computation());
Observable<Integer> onCompleted =
compose(Observable.from(Arrays.asList(4)), subscriptionCount, m)
.subscribeOn(Schedulers.computation());
Observable<Integer> onError = Observable.from(Arrays.asList(5));
Observable<Integer> source = Observable.from(Arrays.asList(10, 20, 30));
@SuppressWarnings("unchecked")
Observer<Object> o = mock(Observer.class);
TestSubscriber<Object> ts = new TestSubscriber<Object>(o);
source.flatMap(just(onNext), just(onError), just0(onCompleted), m).subscribe(ts);
ts.awaitTerminalEvent(1, TimeUnit.SECONDS);
ts.assertNoErrors();
ts.assertTerminalEvent();
verify(o, times(3)).onNext(1);
verify(o, times(3)).onNext(2);
verify(o, times(3)).onNext(3);
verify(o).onNext(4);
verify(o).onCompleted();
verify(o, never()).onNext(5);
verify(o, never()).onError(any(Throwable.class));
}
Observable<UserId> initializeUser(Observable<UserId> userIDs) {
return userIDs
.flatMap(userId -> createUser(userId, branchDatabase.randomExistingID()))
.map(user -> user.getId());
}
@Override
public Observable<WebPageEntity> parse(WebPageEntity webPageEntity) {
Observable<DownloadResult> pages =
client.get(webPageEntity.getUrl(), new DocumentCompletionHandler(webPageEntity));
return pages.flatMap(this::parseDocument).doOnNext(e -> this.parseResultCounter.inc());
}