Package tweetoscope

Class HashtagExtractor

java.lang.Object

tweetoscope.HashtagExtractor

All Implemented Interfaces:

Flow.Publisher<String>, Flow.Subscriber<com.twitter.clientlib.model.Tweet>

public class HashtagExtractor
extends Object
implements Flow.Subscriber<com.twitter.clientlib.model.Tweet>, Flow.Publisher<String>

Reacts to the reception of a new Tweet by parsing its text to look for hashtags. For each hashtag found, if any, notifies its subscribers. Tweets are received from the upstream component

invalid reference

distributed_tweetoscope.tweetsFilter.TweetFilter

via Java Flow. Hashtags are passed downstream to the

invalid reference

distributed_tweetoscope.HashtagCounter

via Java Flow.

Author:

Virginie Galtier

Field Summary

Fields

Modifier and Type	Field	Description
protected List<Flow.Subscriber<? super String>>	subscribers	List of objects to notify when a hashtag is extracted (downstream component = HashtagCounter)

Constructor Summary

Constructors

Constructor	Description
HashtagExtractor()

Method Summary

Modifier and Type	Method	Description
void	onComplete()
void	onError(Throwable throwable)
void	onNext(com.twitter.clientlib.model.Tweet tweet)	Triggered when the upstream component (TweetFilter) passes a new Tweet via Java Flow
void	onSubscribe(Flow.Subscription subscription)
void	subscribe(Flow.Subscriber<? super String> subscriber)

Methods inherited from class java.lang.Object

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

Field Details

subscribers

protected List<Flow.Subscriber<? super String>> subscribers

List of objects to notify when a hashtag is extracted (downstream component = HashtagCounter)

Constructor Details

HashtagExtractor

public HashtagExtractor()

Method Details

subscribe

public void subscribe(Flow.Subscriber<? super String> subscriber)

Specified by:

subscribe in interface Flow.Publisher<String>

onNext

public void onNext(com.twitter.clientlib.model.Tweet tweet)

Triggered when the upstream component (TweetFilter) passes a new Tweet via Java Flow

Specified by:

onNext in interface Flow.Subscriber<com.twitter.clientlib.model.Tweet>

onSubscribe

public void onSubscribe(Flow.Subscription subscription)

Specified by:

onSubscribe in interface Flow.Subscriber<com.twitter.clientlib.model.Tweet>

onError

public void onError(Throwable throwable)

Specified by:

onError in interface Flow.Subscriber<com.twitter.clientlib.model.Tweet>

onComplete

public void onComplete()

Specified by:

onComplete in interface Flow.Subscriber<com.twitter.clientlib.model.Tweet>