@Override
public void call(final Subscriber<? super RecyclerViewChildAttachStateChangeEvent> subscriber) {
checkUiThread();
final OnChildAttachStateChangeListener listener =
new OnChildAttachStateChangeListener() {
@Override
public void onChildViewAttachedToWindow(View childView) {
if (!subscriber.isUnsubscribed()) {
subscriber.onNext(RecyclerViewChildAttachEvent.create(recyclerView, childView));
}
}
@Override
public void onChildViewDetachedFromWindow(View childView) {
if (!subscriber.isUnsubscribed()) {
subscriber.onNext(RecyclerViewChildDetachEvent.create(recyclerView, childView));
}
}
};
recyclerView.addOnChildAttachStateChangeListener(listener);
subscriber.add(
new MainThreadSubscription() {
@Override
protected void onUnsubscribe() {
recyclerView.removeOnChildAttachStateChangeListener(listener);
}
});
}
@Test
public void testUnsubscribeAfterTake() {
final Subscription s = mock(Subscription.class);
TestObservableFunc f = new TestObservableFunc("one", "two", "three");
Observable<String> w = Observable.create(f);
@SuppressWarnings("unchecked")
Observer<String> observer = mock(Observer.class);
Subscriber<String> subscriber = Subscribers.from(observer);
subscriber.add(s);
Observable<String> take = w.lift(new OperatorTake<String>(1));
take.subscribe(subscriber);
// wait for the Observable to complete
try {
f.t.join();
} catch (Throwable e) {
e.printStackTrace();
fail(e.getMessage());
}
System.out.println("TestObservable thread finished");
verify(observer, times(1)).onNext("one");
verify(observer, never()).onNext("two");
verify(observer, never()).onNext("three");
verify(observer, times(1)).onCompleted();
verify(s, times(1)).unsubscribe();
verifyNoMoreInteractions(observer);
}
@Override
public void call(final Subscriber<? super Bitmap> subscriber) {
Preconditions.checkUiThread();
final Target target =
new TargetAdapter() {
@Override
public void onBitmapLoaded(Bitmap bitmap, Picasso.LoadedFrom from) {
if (!subscriber.isUnsubscribed()) subscriber.onNext(bitmap);
}
@Override
public void onBitmapFailed(Drawable errorDrawable) {
if (!subscriber.isUnsubscribed()) subscriber.onError(new PicassoError(errorDrawable));
}
};
Picasso.with(context)
.load(resId)
.noFade()
.memoryPolicy(NO_CACHE, NO_STORE)
.config(Bitmap.Config.ARGB_8888)
.transform(new PicassoTransformation(context, radius))
.into(target);
subscriber.add(
new MainThreadSubscription() {
@Override
protected void onUnsubscribe() {
Picasso.with(context).cancelRequest(target);
PicassoBlurOnSubscribe.this.context = null;
}
});
}
@Test
public void onErrorSuccessWithUnsubscribeFailure() {
AtomicReference<Throwable> onError = new AtomicReference<Throwable>();
Subscriber<String> o = OBSERVER_SUCCESS(onError);
try {
o.add(
Subscriptions.create(
new Action0() {
@Override
public void call() {
// break contract by throwing exception
throw new SafeObserverTestException("failure from unsubscribe");
}
}));
new SafeSubscriber<String>(o).onError(new SafeObserverTestException("failed"));
fail("we expect the unsubscribe failure to cause an exception to be thrown");
} catch (Exception e) {
e.printStackTrace();
assertTrue(o.isUnsubscribed());
// we still expect onError to have received something before unsubscribe blew up
assertNotNull(onError.get());
assertTrue(onError.get() instanceof SafeObserverTestException);
assertEquals("failed", onError.get().getMessage());
// now assert the exception that was thrown
assertTrue(e instanceof SafeObserverTestException);
assertEquals("failure from unsubscribe", e.getMessage());
}
}
@Override
public void call(final Subscriber<? super Void> subscriber) {
checkUiThread();
SearchEditText.OnKeyboardDismissListener listener =
new SearchEditText.OnKeyboardDismissListener() {
@Override
public void onKeyboardDismiss() {
if (!subscriber.isUnsubscribed()) {
subscriber.onNext(null);
}
}
};
view.setOnKeyboardDismissListener(listener);
subscriber.add(
new MainThreadSubscription() {
@Override
protected void onUnsubscribe() {
// TODO: set to null once http://b.android.com/187101 is released.
view.setOnKeyboardDismissListener(
new SearchEditText.OnKeyboardDismissListener() {
@Override
public void onKeyboardDismiss() {}
});
}
});
}
@Override
public void call(final Subscriber<? super Void> subscriber) {
verifyMainThread();
final ViewTreeObserver.OnPreDrawListener listener =
new ViewTreeObserver.OnPreDrawListener() {
@Override
public boolean onPreDraw() {
if (!subscriber.isUnsubscribed()) {
subscriber.onNext(null);
return proceedDrawingPass.call();
}
return true;
}
};
view.getViewTreeObserver().addOnPreDrawListener(listener);
subscriber.add(
new MainThreadSubscription() {
@Override
protected void onUnsubscribe() {
view.getViewTreeObserver().removeOnPreDrawListener(listener);
}
});
}
@Override
public void call(final Subscriber<? super MenuItem> subscriber) {
verifyMainThread();
PopupMenu.OnMenuItemClickListener listener =
new PopupMenu.OnMenuItemClickListener() {
@Override
public boolean onMenuItemClick(MenuItem item) {
if (!subscriber.isUnsubscribed()) {
subscriber.onNext(item);
}
return true;
}
};
view.setOnMenuItemClickListener(listener);
subscriber.add(
new MainThreadSubscription() {
@Override
protected void onUnsubscribe() {
view.setOnMenuItemClickListener(null);
}
});
}
@Override
public void call(final Subscriber<? super T> s) {
if (state.casFirst(0, 1)) {
final NotificationLite<T> nl = NotificationLite.instance();
// drain queued notifications before subscription
// we do this here before PassThruObserver so the consuming thread can do this before
// putting itself in the line of the producer
BufferedObserver<? super T> buffered = (BufferedObserver<? super T>) state.observerRef;
Object o;
while ((o = buffered.buffer.poll()) != null) {
nl.accept(s, o);
}
// register real observer for pass-thru ... and drain any further events received on first
// notification
state.setObserverRef(new PassThruObserver<T>(s, buffered.buffer, state));
s.add(
Subscriptions.create(
new Action0() {
@Override
public void call() {
state.setObserverRef(Subscribers.empty());
}
}));
} else {
s.onError(new IllegalStateException("Only one subscriber allowed!"));
}
}
@Override
public void call(final Subscriber<? super View> subscriber) {
verifyMainThread();
SwipeDismissBehavior.OnDismissListener listener =
new SwipeDismissBehavior.OnDismissListener() {
@Override
public void onDismiss(View view) {
if (!subscriber.isUnsubscribed()) {
subscriber.onNext(view);
}
}
@Override
public void onDragStateChanged(int i) {}
};
if (!(view.getLayoutParams() instanceof LayoutParams)) {
throw new IllegalArgumentException("The view is not in a Coordinator Layout.");
}
LayoutParams params = (LayoutParams) view.getLayoutParams();
final SwipeDismissBehavior behavior = (SwipeDismissBehavior) params.getBehavior();
if (behavior == null) {
throw new IllegalStateException("There's no behavior set on this view.");
}
behavior.setListener(listener);
subscriber.add(
new MainThreadSubscription() {
@Override
protected void onUnsubscribe() {
behavior.setListener(null);
}
});
}
@Override
public void call(final Subscriber<? super FileEvent> subscriber) {
final FileObserver observer =
new FileObserver(pathToWatch) {
@Override
public void onEvent(int event, String file) {
if (subscriber.isUnsubscribed()) {
return;
}
FileEvent fileEvent = FileEvent.create(event, file);
subscriber.onNext(fileEvent);
if (fileEvent.isDeleteSelf()) {
subscriber.onCompleted();
}
}
};
observer.startWatching(); // START OBSERVING
subscriber.add(
Subscriptions.create(
new Action0() {
@Override
public void call() {
observer.stopWatching();
}
}));
}
@Test
public void onCompleteSuccessWithUnsubscribeFailure() {
Subscriber<String> o = OBSERVER_SUCCESS();
try {
o.add(
Subscriptions.create(
new Action0() {
@Override
public void call() {
// break contract by throwing exception
throw new SafeObserverTestException("failure from unsubscribe");
}
}));
new SafeSubscriber<String>(o).onCompleted();
fail("expects exception to be thrown");
} catch (Exception e) {
e.printStackTrace();
assertTrue(o.isUnsubscribed());
assertTrue(e instanceof SafeObserverTestException);
assertEquals("failure from unsubscribe", e.getMessage());
// expected since onError fails so SafeObserver can't help
}
}
@Override
public void call(final Subscriber<? super MotionEvent> subscriber) {
checkUiThread();
View.OnTouchListener listener =
new View.OnTouchListener() {
@Override
public boolean onTouch(View v, @NonNull MotionEvent event) {
if (handled.call(event)) {
if (!subscriber.isUnsubscribed()) {
subscriber.onNext(event);
}
return true;
}
return false;
}
};
view.setOnTouchListener(listener);
subscriber.add(
new MainThreadSubscription() {
@Override
protected void onUnsubscribe() {
view.setOnTouchListener(null);
}
});
}
@Override
public void request(long n) {
if (n < 0L) {
throw new IllegalArgumentException("n >= 0 required but it was " + n);
}
if (n != 0 && compareAndSet(false, true)) {
actual.add(onSchedule.call(this));
}
}
@Override
public void call(final Subscriber<? super T> subscriber) {
final Realm realm = Realm.getInstance(context);
thread = Thread.currentThread();
subscriber.add(
Subscriptions.create(
new Action0() {
@Override
public void call() {
if (thread != null && !thread.isInterrupted()) {
thread.interrupt();
}
}
}));
boolean interrupted = false;
boolean withError = false;
T object = null;
try {
realm.beginTransaction();
object = get(realm);
interrupted = thread.isInterrupted();
if (object != null && !interrupted) {
realm.commitTransaction();
} else {
realm.cancelTransaction();
}
} catch (RuntimeException e) {
realm.cancelTransaction();
subscriber.onError(new RealmException("Error during transaction.", e));
withError = true;
} catch (Error e) {
realm.cancelTransaction();
subscriber.onError(e);
withError = true;
}
if (!interrupted && !withError) {
subscriber.onNext(object);
}
try {
realm.close();
} catch (RealmException ex) {
subscriber.onError(ex);
withError = true;
}
thread = null;
if (!withError) {
subscriber.onCompleted();
}
if (interrupted) {
Thread.currentThread().interrupt();
}
}
@Override
public Subscriber<? super Observable<? extends T>> call(Subscriber<? super T> child) {
final SerializedSubscriber<T> s = new SerializedSubscriber<T>(child);
final CompositeSubscription csub = new CompositeSubscription();
child.add(csub);
SourceSubscriber<T> ssub = new SourceSubscriber<T>(maxConcurrency, s, csub);
child.setProducer(new MergeMaxConcurrentProducer<T>(ssub));
return ssub;
}
@Override
public Subscriber<? super T> call(final Subscriber<? super T> child) {
final ParentSubscriber parent = new ParentSubscriber(child);
child.add(parent); // don't unsubscribe downstream
child.setProducer(
new Producer() {
@Override
public void request(long n) {
parent.downstreamRequest(n);
}
});
return parent;
}
SwitchSubscriber(Subscriber<? super T> child) {
serializedChild = new SerializedSubscriber<T>(child);
arbiter = new ProducerArbiter();
ssub = new SerialSubscription();
child.add(ssub);
child.setProducer(
new Producer() {
@Override
public void request(long n) {
if (n > 0) {
arbiter.request(n);
}
}
});
}
@Test
public void onErrorFailureWithUnsubscribeFailure() {
Subscriber<String> o = OBSERVER_ONERROR_FAIL();
try {
o.add(
Subscriptions.create(
new Action0() {
@Override
public void call() {
// break contract by throwing exception
throw new SafeObserverTestException("failure from unsubscribe");
}
}));
new SafeSubscriber<String>(o).onError(new SafeObserverTestException("onError failure"));
fail("expects exception to be thrown");
} catch (Exception e) {
e.printStackTrace();
assertTrue(o.isUnsubscribed());
// assertions for what is expected for the actual failure propagated to onError which then
// fails
assertTrue(e instanceof RuntimeException);
assertEquals(
"Error occurred when trying to propagate error to Observer.onError and during unsubscription.",
e.getMessage());
Throwable e2 = e.getCause();
assertTrue(e2 instanceof CompositeException);
assertEquals(
"Chain of Causes for CompositeException In Order Received =>",
e2.getCause().getMessage());
Throwable e3 = e2.getCause();
assertTrue(e3.getCause() instanceof SafeObserverTestException);
assertEquals("onError failure", e3.getCause().getMessage());
Throwable e4 = e3.getCause();
assertTrue(e4.getCause() instanceof SafeObserverTestException);
assertEquals("onErrorFail", e4.getCause().getMessage());
Throwable e5 = e4.getCause();
assertTrue(e5.getCause() instanceof SafeObserverTestException);
assertEquals("failure from unsubscribe", e5.getCause().getMessage());
}
}
@Override
public void call(final Subscriber<? super T> subscriber) {
observerRef = subscriber;
source
.observeOn(AndroidSchedulers.mainThread())
.subscribe(
new Subscriber<T>(subscriber) {
@Override
public void onCompleted() {
if (componentRef != null && isComponentValid(componentRef)) {
observerRef.onCompleted();
} else {
unsubscribe();
log("onComplete: target component released or detached; dropping message");
}
}
@Override
public void onError(Throwable e) {
if (componentRef != null && isComponentValid(componentRef)) {
observerRef.onError(e);
} else {
unsubscribe();
log("onError: target component released or detached; dropping message");
}
}
@Override
public void onNext(T args) {
if (componentRef != null && isComponentValid(componentRef)) {
observerRef.onNext(args);
} else {
unsubscribe();
log("onNext: target component released or detached; dropping message");
}
}
});
subscriber.add(
Subscriptions.create(
new Action0() {
@Override
public void call() {
log("unsubscribing from source sequence");
releaseReferences();
}
}));
}
@Override
public Subscriber<? super T> call(final Subscriber<? super T> child) {
// needs to independently unsubscribe so child can continue with the resume
Subscriber<T> s =
new Subscriber<T>() {
private boolean done = false;
@Override
public void onNext(T t) {
if (done) {
return;
}
child.onNext(t);
}
@Override
public void onError(Throwable e) {
if (done) {
Exceptions.throwIfFatal(e);
return;
}
done = true;
if (e instanceof Exception) {
RxJavaPlugins.getInstance().getErrorHandler().handleError(e);
unsubscribe();
resumeSequence.unsafeSubscribe(child);
} else {
child.onError(e);
}
}
@Override
public void onCompleted() {
if (done) {
return;
}
done = true;
child.onCompleted();
}
};
child.add(s);
return s;
}
@Override
public void call(final Subscriber<? super T> subscriber) {
try {
// create the resource
final Resource resource = resourceFactory.call();
// create an action/subscription that disposes only once
final DisposeAction<Resource> disposeOnceOnly =
new DisposeAction<Resource>(dispose, resource);
// dispose on unsubscription
subscriber.add(disposeOnceOnly);
// create the observable
final Observable<? extends T> source =
observableFactory
// create the observable
.call(resource);
final Observable<? extends T> observable;
// supplement with on termination disposal if requested
if (disposeEagerly)
observable =
source
// dispose on completion or error
.doOnTerminate(disposeOnceOnly);
else observable = source;
try {
// start
observable.unsafeSubscribe(Subscribers.wrap(subscriber));
} catch (Throwable e) {
Throwable disposeError = disposeEagerlyIfRequested(disposeOnceOnly);
Exceptions.throwIfFatal(e);
Exceptions.throwIfFatal(disposeError);
if (disposeError != null)
subscriber.onError(new CompositeException(Arrays.asList(e, disposeError)));
else
// propagate error
subscriber.onError(e);
}
} catch (Throwable e) {
// then propagate error
Exceptions.throwOrReport(e, subscriber);
}
}
@Override
public void call(Subscriber<? super T> t) {
final SerialSubscription serial = new SerialSubscription();
t.add(serial);
final Subscriber<T> child = Subscribers.wrap(t);
Subscriber<U> otherSubscriber =
new Subscriber<U>() {
boolean done;
@Override
public void onNext(U t) {
onCompleted();
}
@Override
public void onError(Throwable e) {
if (done) {
RxJavaPlugins.getInstance().getErrorHandler().handleError(e);
return;
}
done = true;
child.onError(e);
}
@Override
public void onCompleted() {
if (done) {
return;
}
done = true;
serial.set(Subscriptions.unsubscribed());
main.unsafeSubscribe(child);
}
};
serial.set(otherSubscriber);
other.unsafeSubscribe(otherSubscriber);
}
@Override
public void call(final Subscriber<? super Void> subscriber) {
checkUiThread();
SwipeRefreshLayout.OnRefreshListener listener =
new SwipeRefreshLayout.OnRefreshListener() {
@Override
public void onRefresh() {
subscriber.onNext(null);
}
};
subscriber.add(
new MainThreadSubscription() {
@Override
protected void onUnsubscribe() {
view.setOnRefreshListener(null);
}
});
view.setOnRefreshListener(listener);
}
@Override
public void call(final Subscriber<? super RatingBarChangeEvent> subscriber) {
checkUiThread();
RatingBar.OnRatingBarChangeListener listener =
new RatingBar.OnRatingBarChangeListener() {
@Override
public void onRatingChanged(RatingBar ratingBar, float rating, boolean fromUser) {
if (!subscriber.isUnsubscribed()) {
subscriber.onNext(RatingBarChangeEvent.create(ratingBar, rating, fromUser));
}
}
};
subscriber.add(
new MainThreadSubscription() {
@Override
protected void onUnsubscribe() {
view.setOnRatingBarChangeListener(null);
}
});
view.setOnRatingBarChangeListener(listener);
}
@Override
public Subscriber<? super Observable<? extends T>> call(final Subscriber<? super T> child) {
SwitchSubscriber<T> sws = new SwitchSubscriber<T>(child);
child.add(sws);
return sws;
}
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();
}
@Override
public void call(final Subscriber<? super View> subscriber) {
final SubscriptionAdapter adapter = new SubscriptionAdapter(subscriber, view);
subscriber.add(adapter);
view.addOnAttachStateChangeListener(adapter);
}
@Override
public void call(Subscriber<? super String> observer) {
this.observer = observer;
observer.add(s);
}
