Twitter4J (#1300)

* rest with spark java

* 4

* Update Application.java

* indentation changes

* spring @requestmapping shortcuts

* removing spring requestmapping and pushing spring-mvc-java

* Joining/Splitting Strings with Java and Stream API

* adding more join/split functionality

* changing package name

* testcase change

* adding webutils

* adding testcase for WebUtils and ServletRequestUtils

* adding testcase

* spring-security-stormpath

* Twitter4J

* Update Application.java

* Update ApplicationTest.java

* Update twitter4j.properties

Twitter4J/src/main/java/com/baeldung/Application.java

@@ -0,0 +1,117 @@
+/**
+ * 
+ */
+package com.baeldung;
+
+import java.util.List;
+import java.util.stream.Collectors;
+
+import twitter4j.DirectMessage;
+import twitter4j.Query;
+import twitter4j.QueryResult;
+import twitter4j.StallWarning;
+import twitter4j.Status;
+import twitter4j.StatusDeletionNotice;
+import twitter4j.StatusListener;
+import twitter4j.Twitter;
+import twitter4j.TwitterException;
+import twitter4j.TwitterFactory;
+import twitter4j.TwitterStream;
+import twitter4j.TwitterStreamFactory;
+import twitter4j.conf.ConfigurationBuilder;
+
+public class Application {
+
+	public static Twitter getTwitterinstance() {
+		/**
+		 * if not using properties file, we can set access token by following way
+		 */
+//		ConfigurationBuilder cb = new ConfigurationBuilder();
+//		cb.setDebugEnabled(true)
+//		  .setOAuthConsumerKey("DPHTBsWWO42d8rzshxlK0OwSY")
+//		  .setOAuthConsumerSecret("ACLXkeRY98NiaVCG1ai8fdYt0GoEGJbFeTuxjulSCO7sLKqls1")
+//		  .setOAuthAccessToken("838080188214759428-9MSK1ddPTN5ZZHbddjFI7s75mYgmCFQ")
+//		  .setOAuthAccessTokenSecret("1eXAADpHShAzQh5hGWLBUQHLysOuAKIOapmQQ8U0OVk2c");
+//
+//		TwitterFactory tf = new TwitterFactory(cb.build());
+//		Twitter twitter = tf.getSingleton();
+		
+		Twitter twitter = TwitterFactory.getSingleton();
+		return twitter;
+		
+	}
+	
+	public static String createTweet(String tweet) throws TwitterException {
+		Twitter twitter = getTwitterinstance();
+		Status status = twitter.updateStatus("creating baeldung API");
+	        return status.getText();
+	}
+	
+	public static List<String> getTimeLine() throws TwitterException {
+		Twitter twitter = getTwitterinstance();
+		List<Status> statuses = twitter.getHomeTimeline();
+		return statuses.stream().map(
+				item -> item.getText()).collect(
+						Collectors.toList());
+	}
+	
+	public static String sendDirectMessage(String recipientName, String msg) throws TwitterException {
+		Twitter twitter = getTwitterinstance();
+	        DirectMessage message = twitter.sendDirectMessage(recipientName, msg);
+	        return message.getText();
+	}
+	
+	public static List<String> searchtweets() throws TwitterException {
+		Twitter twitter = getTwitterinstance();
+	        Query query = new Query("source:twitter4j baeldung");
+	        QueryResult result = twitter.search(query);
+	        List<Status> statuses = result.getTweets();
+	        return statuses.stream().map(
+				item -> item.getText()).collect(
+						Collectors.toList());
+	}
+	
+	public static void streamFeed() {
+		
+		StatusListener listener = new StatusListener(){
+
+			@Override
+			public void onException(Exception e) {
+				e.printStackTrace();
+			}
+
+			@Override
+			public void onDeletionNotice(StatusDeletionNotice arg) {
+                                System.out.println("Got a status deletion notice id:" + arg.getStatusId());
+			}
+
+			@Override
+			public void onScrubGeo(long userId, long upToStatusId) {
+                                System.out.println("Got scrub_geo event userId:" + userId + " upToStatusId:" + upToStatusId);
+			}
+
+			@Override
+			public void onStallWarning(StallWarning warning) {
+                                System.out.println("Got stall warning:" + warning);
+			}
+
+			@Override
+			public void onStatus(Status status) {
+                                System.out.println(status.getUser().getName() + " : " + status.getText());
+			}
+
+			@Override
+			public void onTrackLimitationNotice(int numberOfLimitedStatuses) {
+                                System.out.println("Got track limitation notice:" + numberOfLimitedStatuses);
+			}
+		};
+	
+		TwitterStream twitterStream = new TwitterStreamFactory().getInstance();
+		
+	        twitterStream.addListener(listener);
+	    
+	        twitterStream.sample();
+		
+	}
+	
+}

Twitter4J/src/main/resources/twitter4j.properties

@@ -0,0 +1,4 @@
+oauth.consumerKey=//TODO
+oauth.consumerSecret=//TODO
+oauth.accessToken=//TODO
+oauth.accessTokenSecret=//TODO