Class ObservableFirstStageObserver<T>

java.lang.Object

java.util.concurrent.CompletableFuture<T>

io.reactivex.rxjava3.internal.jdk8.ObservableFirstStageObserver<T>

Type Parameters:

T - the element type

All Implemented Interfaces:

Observer<T>, CompletionStage<T>, Future<T>

public final class ObservableFirstStageObserver<T>
extends CompletableFuture<T>

Signals the first element of the source via the underlying CompletableFuture, signals the a default item if the upstream is empty or signals NoSuchElementException.

Since:

3.0.0

Nested Class Summary

Nested classes/interfaces inherited from class CompletableFuture

CompletableFuture.AsynchronousCompletionTask

Nested classes/interfaces inherited from interface Future

Future.State

Constructor Summary

Constructors

Constructor	Description
ObservableFirstStageObserver(boolean hasDefault, T defaultItem)

Method Summary

Modifier and Type	Method	Description
final boolean	cancel(boolean mayInterruptIfRunning)
protected final void	clear()
final boolean	complete(T value)
final boolean	completeExceptionally(Throwable ex)
protected final void	disposeUpstream()
void	onComplete()	Notifies the Observer that the Observable has finished sending push-based notifications.
final void	onError(Throwable t)	Notifies the Observer that the Observable has experienced an error condition.
void	onNext(T t)	Provides the Observer with a new item to observe.
final void	onSubscribe(@NonNull Disposable d)	Provides the Observer with the means of cancelling (disposing) the connection (channel) with the Observable in both synchronous (from within Observer.onNext(Object)) and asynchronous manner.

Methods inherited from class CompletableFuture

acceptEither, acceptEitherAsync, acceptEitherAsync, allOf, anyOf, applyToEither, applyToEitherAsync, applyToEitherAsync, completeAsync, completeAsync, completedFuture, completedStage, completeOnTimeout, copy, defaultExecutor, delayedExecutor, delayedExecutor, exceptionally, exceptionallyAsync, exceptionallyAsync, exceptionallyCompose, exceptionallyComposeAsync, exceptionallyComposeAsync, exceptionNow, failedFuture, failedStage, get, get, getNow, getNumberOfDependents, handle, handleAsync, handleAsync, isCancelled, isCompletedExceptionally, isDone, join, minimalCompletionStage, newIncompleteFuture, obtrudeException, obtrudeValue, orTimeout, resultNow, runAfterBoth, runAfterBothAsync, runAfterBothAsync, runAfterEither, runAfterEitherAsync, runAfterEitherAsync, runAsync, runAsync, state, supplyAsync, supplyAsync, thenAccept, thenAcceptAsync, thenAcceptAsync, thenAcceptBoth, thenAcceptBothAsync, thenAcceptBothAsync, thenApply, thenApplyAsync, thenApplyAsync, thenCombine, thenCombineAsync, thenCombineAsync, thenCompose, thenComposeAsync, thenComposeAsync, thenRun, thenRunAsync, thenRunAsync, toCompletableFuture, toString, whenComplete, whenCompleteAsync, whenCompleteAsync

Methods inherited from class Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Details

ObservableFirstStageObserver

public ObservableFirstStageObserver(boolean hasDefault,
 T defaultItem)

Method Details

onNext

public void onNext(T t)

Description copied from interface: Observer

Provides the Observer with a new item to observe.

The Observable may call this method 0 or more times.

The Observable will not call this method again after it calls either Observer.onComplete() or Observer.onError(Throwable).

Parameters:

t - the item emitted by the Observable

onComplete

public void onComplete()

Description copied from interface: Observer

Notifies the Observer that the Observable has finished sending push-based notifications.

The Observable will not call this method if it calls Observer.onError(Throwable).

onSubscribe

public final void onSubscribe(@NonNull
 @NonNull Disposable d)

Description copied from interface: Observer

Provides the Observer with the means of cancelling (disposing) the connection (channel) with the Observable in both synchronous (from within Observer.onNext(Object)) and asynchronous manner.

Specified by:

onSubscribe in interface Observer<T>

Parameters:

d - the Disposable instance whose Disposable.dispose() can be called anytime to cancel the connection

onError

public final void onError(Throwable t)

Description copied from interface: Observer

Notifies the Observer that the Observable has experienced an error condition.

If the Observable calls this method, it will not thereafter call Observer.onNext(T) or Observer.onComplete().

Specified by:

onError in interface Observer<T>

Parameters:

t - the exception encountered by the Observable

disposeUpstream

protected final void disposeUpstream()

clear

protected final void clear()

cancel

public final boolean cancel(boolean mayInterruptIfRunning)

Specified by:

cancel in interface Future<T>

Overrides:

cancel in class CompletableFuture<T>

complete

public final boolean complete(T value)

Overrides:

complete in class CompletableFuture<T>

completeExceptionally

public final boolean completeExceptionally(Throwable ex)

Overrides:

completeExceptionally in class CompletableFuture<T>