Twitter4j: Streamig API about a hashtag or query

Question

I'm trying to use the twitter4j API to get the stream of tweets on a specific topic.

This is my code:

TwitterStream twitterStream = inizialize();

    StatusListener listener = new StatusListener(){
        public void onStatus(Status status) {
            System.out.println(status.getUser().getName() + " ====> " + status.getText());
        }
        public void onDeletionNotice(StatusDeletionNotice statusDeletionNotice) {}
        public void onTrackLimitationNotice(int numberOfLimitedStatuses) {}
        public void onException(Exception ex) {
            ex.printStackTrace();
        }
        @Override
        public void onScrubGeo(long userId, long upToStatusId) {
            // TODO Auto-generated method stub

        }
        @Override
        public void onStallWarning(StallWarning warning) {
            // TODO Auto-generated method stub

        }
    };


    FilterQuery filterQuery = new FilterQuery("GAME");
    twitterStream.addListener(listener);
    twitterStream.filter(filterQuery);
    twitterStream.sample(); // sample() method internally creates a thread which manipulates TwitterStream and calls these adequate listener methods continuously.

}

The stream of tweets works well, but I cannot set any query. So, I wonder, is it possible to do what I'm trying to? Of course, the inizialize() returns a twitterStream configured with a valid oauth token.

Answer 1

You'll want to manually filter statuses coming from the stream. For example, if you want to show tweets that contains 'vanilla' only then you could approach like this in your onStatus:

public void onStatus(Status status) {
    String statusText = status.getText();
    if (statusText.toLowerCase().contains("vanilla")) {
        System.out.println(status.getUser().getName() + " ====> " + statusText);
    }
}