Package com.linecorp.armeria.common.stream

Class RegularFixedStreamMessage<T>

java.lang.Object

com.linecorp.armeria.common.stream.RegularFixedStreamMessage<T>

All Implemented Interfaces:

StreamMessage<T>, org.reactivestreams.Publisher<T>

@UnstableApi
public class RegularFixedStreamMessage<T>
extends Object

A FixedStreamMessage that publishes an arbitrary number of objects. It is recommended to use EmptyFixedStreamMessage, OneElementFixedStreamMessage, or TwoElementFixedStreamMessage when publishing less than three objects.

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	RegularFixedStreamMessage(T[] objs)	Creates a new instance with the specified elements.

Method Summary

Modifier and Type	Method	Description
void	abort()	Closes this stream with AbortedStreamException and prevents further subscription.
void	abort(Throwable cause)	Closes this stream with the specified Throwable and prevents further subscription.
boolean	isEmpty()	Returns true if this stream has been closed and did not publish any elements.
boolean	isOpen()	Returns true if this stream is not closed yet.
protected void	onRemoval(T obj)	Invoked after an element is removed from the StreamMessage and before Subscriber.onNext(Object) is invoked.
void	subscribe(org.reactivestreams.Subscriber<? super T> subscriber, EventExecutor executor)	Requests to start streaming data to the specified Subscriber.
void	subscribe(org.reactivestreams.Subscriber<? super T> subscriber, EventExecutor executor, SubscriptionOption... options)	Requests to start streaming data to the specified Subscriber.
CompletableFuture<Void>	whenComplete()	Returns a CompletableFuture that completes when this stream is complete, either successfully or exceptionally, including cancellation and abortion.

Methods inherited from class java.lang.Object

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

Methods inherited from interface com.linecorp.armeria.common.stream.StreamMessage

defaultSubscriberExecutor, isComplete, subscribe, subscribe, toDuplicator, toDuplicator

Constructor Details

RegularFixedStreamMessage

protected RegularFixedStreamMessage(T[] objs)

Creates a new instance with the specified elements.

Method Details

isEmpty

public final boolean isEmpty()

Description copied from interface: StreamMessage

Returns true if this stream has been closed and did not publish any elements. Note that this method will not return true when the stream is open even if it has not published anything so far, because it may publish something later.

isOpen

public final boolean isOpen()

Description copied from interface: StreamMessage

Returns true if this stream is not closed yet. Note that a stream may not be complete even if it's closed; a stream is complete when it's fully consumed by a Subscriber.

abort

public final void abort()

Description copied from interface: StreamMessage

Closes this stream with AbortedStreamException and prevents further subscription. A Subscriber that attempts to subscribe to an aborted stream will be notified with an AbortedStreamException via Subscriber.onError(Throwable). Calling this method on a closed or aborted stream has no effect.

abort

public final void abort(Throwable cause)

Description copied from interface: StreamMessage

Closes this stream with the specified Throwable and prevents further subscription. A Subscriber that attempts to subscribe to an aborted stream will be notified with the specified Throwable via Subscriber.onError(Throwable). Calling this method on a closed or aborted stream has no effect.

subscribe

public final void subscribe(org.reactivestreams.Subscriber<? super T> subscriber, EventExecutor executor)

Description copied from interface: StreamMessage

Requests to start streaming data to the specified Subscriber. If there is a problem subscribing, Subscriber.onError(Throwable) will be invoked with one of the following exceptions:

• IllegalStateException if other Subscriber subscribed to this stream already.
• AbortedStreamException if this stream has been aborted.
• CancelledSubscriptionException if this stream has been cancelled and SubscriptionOption.NOTIFY_CANCELLATION is specified when subscribed.
• Other exceptions that occurred due to an error while retrieving the elements.

Specified by:

subscribe in interface StreamMessage<T>

executor - the executor to subscribe

subscribe

public final void subscribe(org.reactivestreams.Subscriber<? super T> subscriber, EventExecutor executor, SubscriptionOption... options)

Description copied from interface: StreamMessage

Requests to start streaming data to the specified Subscriber. If there is a problem subscribing, Subscriber.onError(Throwable) will be invoked with one of the following exceptions:

• IllegalStateException if other Subscriber subscribed to this stream already.
• AbortedStreamException if this stream has been aborted.
• CancelledSubscriptionException if this stream has been cancelled and SubscriptionOption.NOTIFY_CANCELLATION is specified when subscribed.
• Other exceptions that occurred due to an error while retrieving the elements.

Specified by:

subscribe in interface StreamMessage<T>

executor - the executor to subscribe

options - SubscriptionOptions to subscribe with

whenComplete

public final CompletableFuture<Void> whenComplete()

Description copied from interface: StreamMessage

Returns a CompletableFuture that completes when this stream is complete, either successfully or exceptionally, including cancellation and abortion.

A StreamMessage is complete (or 'fully consumed') when:

• the Subscriber consumes all elements and Subscriber.onComplete() is invoked,
• an error occurred and Subscriber.onError(Throwable) is invoked,
• the Subscription has been cancelled or
• StreamMessage.abort() has been requested.

Specified by:

whenComplete in interface StreamMessage<T>

onRemoval

protected void onRemoval(T obj)

Invoked after an element is removed from the StreamMessage and before Subscriber.onNext(Object) is invoked.

Parameters:

obj - the removed element