1. Linked Data & Semantic Web Technology Development of Twitter Applications Part 6. Trends Dr. Myungjin Lee

2. Linked Data & Semantic Web Technology Trends API Trends REST API – to explore what's trending on Twitter – Trends are determined by an algorithm and are tailored for you based on who you follow and your location. 2

3. Linked Data & Semantic Web Technology REST API related to Trends 3 ResourceDescription GET trends/place Returns the top 10 trending topics for a specific WOEID, if trending information is available for it. The response is an array of "trend" objects that encode the name of the trending topic, the query parameter that can be used to search for the topic on Twitter Search, and the Twitter Search URL.... GET trends/available Returns the locations that Twitter has trending topic information for. The response is an array of "locations" that encode the location's WOEID and some other human-readable information such as a canonical name and country the location belongs in. A WOEID is a Yahoo! Where On Earth ID. GET trends/closest Returns the locations that Twitter has trending topic information for, closest to a specified location. The response is an array of "locations" that encode the location's WOEID and some other human-readable information such as a canonical name and country the location belongs in. A WOEID is a Yahoo...

4. Linked Data & Semantic Web Technology GET trends/available Resource URL – https://api.twitter.com/1.1/trends/available.json Other Information – Requests per rate limit window: 15/user, 15/app – Authentication: Required – Response The response is an array of "locations" that encode the location's WOEID and some other human-readable information. A WOEID is a Yahoo! Where On Earth ID. – API Version: v1.1 4

5. Linked Data & Semantic Web Technology Twitter4J Classes for Trends TrendsResources Interface – Methods ResponseList getAvailableTrends() Trends getPlaceTrends(int woeid) Location Interface – Methods java.lang.String getCountryCode() java.lang.String getCountryName() java.lang.String getName() int getPlaceCode() java.lang.String getPlaceName() java.lang.String getURL() int getWoeid() Trends Interface – Methods Location getLocation() java.util.Date getTrendAt() Trend[] getTrends() Trend Interface – A data interface representing Trend. – Methods java.lang.String getName() java.lang.String getURL() 5

6. Linked Data & Semantic Web Technology Getting Locations for Available Trends 1.import twitter4j.Location; 2.import twitter4j.ResponseList; 3.import twitter4j.Twitter; 4.import twitter4j.TwitterException; 5.import twitter4j.TwitterFactory; 6.public class TwitterTrends { 7.Twitter twitter = null; 8.public TwitterTrends() { 9.this.twitter = TwitterFactory.getSingleton(); 10.this.twitter.setOAuthConsumer(TwitterAccessToken.consumerKey, 11.TwitterAccessToken.consumerSecret); 12.this.twitter.setOAuthAccessToken(TwitterAccessToken.loadAccessToken()); 13.} 14.public static void main(String args[]) throws TwitterException { 15.TwitterTrends tt = new TwitterTrends(); 16.ResponseList locations = tt.twitter.getAvailableTrends(); 17.for (int i = 0; i < locations.size(); i++) { 18.Location location = locations.get(i); 19.System.out.println(location.getName() + ", " 20.+ location.getCountryName() + ": " + location.getWoeid()); 21.} 22.} 23.} 6

7. Linked Data & Semantic Web Technology GET trends/place Resource URL – https://api.twitter.com/1.1/trends/place.json Parameters Other Information – Requests per rate limit window: 15/user, 15/app – Authentication: Required – API Version: v1.1 id required The Yahoo! Where On Earth ID of the location to return trending information for. Global information is available by using 1 as the WOEID. exclude optional Setting this equal to hashtags will remove all hashtags from the trends list. 7

8. Linked Data & Semantic Web Technology Getting Trends 1.public static void main(String args[]) throws TwitterException { 2.TwitterTrends tt = new TwitterTrends(); 3.Trends trends = tt.twitter.getPlaceTrends(1); 4.Trend[] trend = trends.getTrends(); 5.for(int i = 0; i < trend.length; i++) { 6.System.out.println(i + ". " + trend[i].getName()); 7.} 8.} 8