org.reactivestreams.example.unicast

Class SyncSubscriber<T>

java.lang.Object

org.reactivestreams.example.unicast.SyncSubscriber<T>

All Implemented Interfaces:

Subscriber<T>

public abstract class SyncSubscriber<T>
extends java.lang.Object
implements Subscriber<T>

SyncSubscriber is an implementation of Reactive Streams `Subscriber`, it runs synchronously (on the Publisher's thread) and requests one element at a time and invokes a user-defined method to process each element. NOTE: The code below uses a lot of try-catches to show the reader where exceptions can be expected, and where they are forbidden.

Constructor Summary

Constructors

Constructor and Description
SyncSubscriber()

Method Summary

Modifier and Type	Method and Description
protected abstract boolean	foreach(T element)
void	onComplete() Successful terminal state.
void	onError(java.lang.Throwable t) Failed terminal state.
void	onNext(T element) Data notification sent by the Publisher in response to requests to Subscription.request(long).
void	onSubscribe(Subscription s) Invoked after calling Publisher.subscribe(Subscriber).

Methods inherited from class java.lang.Object

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

Constructor Detail

SyncSubscriber

public SyncSubscriber()

Method Detail

onSubscribe

public void onSubscribe(Subscription s)

Description copied from interface: Subscriber

Invoked after calling Publisher.subscribe(Subscriber).

No data will start flowing until Subscription.request(long) is invoked.

It is the responsibility of this Subscriber instance to call Subscription.request(long) whenever more data is wanted.

The Publisher will send notifications only in response to Subscription.request(long).

Specified by:

onSubscribe in interface Subscriber<T>

Parameters:

s - Subscription that allows requesting data via Subscription.request(long)

onNext

public void onNext(T element)

Description copied from interface: Subscriber

Data notification sent by the Publisher in response to requests to Subscription.request(long).

Specified by:

onNext in interface Subscriber<T>

Parameters:

element - the element signaled

foreach

protected abstract boolean foreach(T element)

onError

public void onError(java.lang.Throwable t)

Description copied from interface: Subscriber

Failed terminal state.

No further events will be sent even if Subscription.request(long) is invoked again.

Specified by:

onError in interface Subscriber<T>

Parameters:

t - the throwable signaled

onComplete

public void onComplete()

Description copied from interface: Subscriber

Successful terminal state.

No further events will be sent even if Subscription.request(long) is invoked again.

Specified by:

onComplete in interface Subscriber<T>