add reddit classifier

spring-security-oauth/pom.xml

@@ -156,6 +156,13 @@
             <scope>runtime</scope>
         </dependency>
 
+        <!-- apache mahout  -->
+        
+        <dependency>
+	        <groupId>org.apache.mahout</groupId>
+	        <artifactId>mahout-core</artifactId>
+	        <version>0.9</version>
+        </dependency>
         
         <!-- marshalling -->
 

spring-security-oauth/src/main/java/org/baeldung/config/WebConfig.java

@@ -1,14 +1,24 @@
 package org.baeldung.config;
 
+import java.io.IOException;
+import java.util.ArrayList;
 import java.util.Arrays;
+import java.util.List;
 
+import org.baeldung.reddit.classifier.RedditClassifier;
+import org.baeldung.reddit.util.UserAgentInterceptor;
 import org.baeldung.web.schedule.ScheduledTasks;
+import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.beans.factory.annotation.Value;
 import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.ComponentScan;
 import org.springframework.context.annotation.Configuration;
 import org.springframework.context.annotation.PropertySource;
 import org.springframework.context.support.PropertySourcesPlaceholderConfigurer;
+import org.springframework.core.env.Environment;
+import org.springframework.core.io.ClassPathResource;
+import org.springframework.core.io.Resource;
+import org.springframework.http.client.ClientHttpRequestInterceptor;
 import org.springframework.scheduling.annotation.EnableAsync;
 import org.springframework.scheduling.annotation.EnableScheduling;
 import org.springframework.security.oauth2.client.OAuth2ClientContext;
@@ -36,6 +46,9 @@ import org.springframework.web.servlet.view.InternalResourceViewResolver;
 @ComponentScan({ "org.baeldung.web" })
 public class WebConfig extends WebMvcConfigurerAdapter {
 
+    @Autowired
+    private Environment env;
+
     @Bean
     public static PropertySourcesPlaceholderConfigurer propertySourcesPlaceholderConfigurer() {
         return new PropertySourcesPlaceholderConfigurer();
@@ -63,10 +76,22 @@ public class WebConfig extends WebMvcConfigurerAdapter {
     @Bean
     public ScheduledTasks scheduledTasks(OAuth2ProtectedResourceDetails reddit) {
         final ScheduledTasks s = new ScheduledTasks();
-        s.setRedditRestTemplate(new OAuth2RestTemplate(reddit));
+        final List<ClientHttpRequestInterceptor> list = new ArrayList<ClientHttpRequestInterceptor>();
+        list.add(new UserAgentInterceptor());
+        final OAuth2RestTemplate restTemplate = new OAuth2RestTemplate(reddit);
+        restTemplate.setInterceptors(list);
+        s.setRedditRestTemplate(restTemplate);
         return s;
     }
 
+    @Bean
+    public RedditClassifier redditClassifier() throws IOException {
+        final Resource file = new ClassPathResource("train.csv");
+        final RedditClassifier redditClassifier = new RedditClassifier();
+        redditClassifier.trainClassifier(file.getFile().getAbsolutePath());
+        return redditClassifier;
+    }
+
     @Override
     public void addResourceHandlers(ResourceHandlerRegistry registry) {
         registry.addResourceHandler("/resources/**").addResourceLocations("/resources/");
@@ -108,6 +133,9 @@ public class WebConfig extends WebMvcConfigurerAdapter {
         @Bean
         public OAuth2RestTemplate redditRestTemplate(OAuth2ClientContext clientContext) {
             final OAuth2RestTemplate template = new OAuth2RestTemplate(reddit(), clientContext);
+            final List<ClientHttpRequestInterceptor> list = new ArrayList<ClientHttpRequestInterceptor>();
+            list.add(new UserAgentInterceptor());
+            template.setInterceptors(list);
             final AccessTokenProvider accessTokenProvider = new AccessTokenProviderChain(Arrays.<AccessTokenProvider> asList(new MyAuthorizationCodeAccessTokenProvider(), new ImplicitAccessTokenProvider(), new ResourceOwnerPasswordAccessTokenProvider(),
                     new ClientCredentialsAccessTokenProvider()));
             template.setAccessTokenProvider(accessTokenProvider);

spring-security-oauth/src/main/java/org/baeldung/reddit/classifier/RedditClassifier.java

@@ -0,0 +1,107 @@
+package org.baeldung.reddit.classifier;
+
+import java.io.BufferedReader;
+import java.io.FileReader;
+import java.io.IOException;
+
+import org.apache.mahout.classifier.sgd.L2;
+import org.apache.mahout.classifier.sgd.OnlineLogisticRegression;
+import org.apache.mahout.math.RandomAccessSparseVector;
+import org.apache.mahout.math.Vector;
+import org.apache.mahout.vectorizer.encoders.AdaptiveWordValueEncoder;
+import org.apache.mahout.vectorizer.encoders.FeatureVectorEncoder;
+import org.apache.mahout.vectorizer.encoders.StaticWordValueEncoder;
+
+import com.google.common.base.Splitter;
+
+public class RedditClassifier {
+
+    public static int GOOD = 0;
+    public static int BAD = 1;
+    private final OnlineLogisticRegression classifier;
+    private final FeatureVectorEncoder titleEncoder;
+    private final FeatureVectorEncoder domainEncoder;
+
+    private final int[] trainCount = { 0, 0 };
+
+    private final int[] evalCount = { 0, 0 };
+
+    public RedditClassifier() {
+        classifier = new OnlineLogisticRegression(2, 4, new L2(1));
+        titleEncoder = new AdaptiveWordValueEncoder("title");
+        titleEncoder.setProbes(1);
+        domainEncoder = new StaticWordValueEncoder("domain");
+        domainEncoder.setProbes(1);
+    }
+
+    public void trainClassifier(String fileName) throws IOException {
+        final BufferedReader reader = new BufferedReader(new FileReader(fileName));
+        int category;
+        Vector features;
+        String line = reader.readLine();
+        if (line == null) {
+            new RedditDataCollector().collectData();
+        }
+
+        while ((line != null) && (line != "")) {
+            category = (line.startsWith("good")) ? GOOD : BAD;
+            trainCount[category]++;
+            features = convertLineToVector(line);
+            classifier.train(category, features);
+            line = reader.readLine();
+        }
+        reader.close();
+        System.out.println("Training count ========= " + trainCount[0] + "___" + trainCount[1]);
+    }
+
+    public int classify(Vector features) {
+        return classifier.classifyFull(features).maxValueIndex();
+    }
+
+    public Vector convertPost(String title, String domain, int hour) {
+        final Vector features = new RandomAccessSparseVector(4);
+        final int noOfWords = Splitter.onPattern("\\W").omitEmptyStrings().splitToList(title).size();
+        titleEncoder.addToVector(title, features);
+        domainEncoder.addToVector(domain, features);
+        features.set(2, hour);
+        features.set(3, noOfWords);
+        return features;
+    }
+
+    public double evaluateClassifier() throws IOException {
+        final BufferedReader reader = new BufferedReader(new FileReader(RedditDataCollector.TEST_FILE));
+        int category, result;
+        int correct = 0;
+        int wrong = 0;
+        Vector features;
+        String line = reader.readLine();
+        while ((line != null) && (line != "")) {
+            category = (line.startsWith("good")) ? GOOD : BAD;
+            evalCount[category]++;
+            features = convertLineToVector(line);
+            result = classify(features);
+            if (category == result) {
+                correct++;
+            } else {
+                wrong++;
+            }
+            line = reader.readLine();
+        }
+        reader.close();
+        System.out.println(correct + " ----- " + wrong);
+        System.out.println("Eval count ========= " + evalCount[0] + "___" + evalCount[1]);
+        return correct / (wrong + correct + 0.0);
+    }
+
+    // ==== private
+    private Vector convertLineToVector(String line) {
+        final Vector features = new RandomAccessSparseVector(4);
+        final String[] items = line.split(";");
+        titleEncoder.addToVector(items[3], features);
+        domainEncoder.addToVector(items[4], features);
+        features.set(2, Integer.parseInt(items[1])); // hour of day
+        features.set(3, Integer.parseInt(items[2])); // number of words in the title
+        return features;
+    }
+
+}

spring-security-oauth/src/main/java/org/baeldung/reddit/classifier/RedditDataCollector.java

@@ -0,0 +1,109 @@
+package org.baeldung.reddit.classifier;
+
+import java.io.FileWriter;
+import java.io.IOException;
+import java.text.SimpleDateFormat;
+import java.util.ArrayList;
+import java.util.Date;
+import java.util.List;
+
+import org.baeldung.reddit.util.UserAgentInterceptor;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.http.client.ClientHttpRequestInterceptor;
+import org.springframework.web.client.RestTemplate;
+
+import com.fasterxml.jackson.databind.JsonNode;
+import com.google.common.base.Joiner;
+import com.google.common.base.Splitter;
+
+public class RedditDataCollector {
+    public static final String TRAINING_FILE = "src/main/resources/train.csv";
+    public static final String TEST_FILE = "src/main/resources/test.csv";
+    private final Logger logger = LoggerFactory.getLogger(getClass());
+
+    private String postAfter;
+    private final RestTemplate restTemplate;
+    private final String subreddit;
+    private final int minScore;
+
+    public RedditDataCollector() {
+        restTemplate = new RestTemplate();
+        final List<ClientHttpRequestInterceptor> list = new ArrayList<ClientHttpRequestInterceptor>();
+        list.add(new UserAgentInterceptor());
+        restTemplate.setInterceptors(list);
+        subreddit = "all";
+        minScore = 4;
+    }
+
+    public RedditDataCollector(String subreddit, int minScore) {
+        restTemplate = new RestTemplate();
+        final List<ClientHttpRequestInterceptor> list = new ArrayList<ClientHttpRequestInterceptor>();
+        list.add(new UserAgentInterceptor());
+        restTemplate.setInterceptors(list);
+        this.subreddit = subreddit;
+        this.minScore = minScore;
+    }
+
+    public void collectData() {
+        final int limit = 100;
+        final int noOfRounds = 80;
+        try {
+            final FileWriter writer = new FileWriter(TRAINING_FILE);
+            for (int i = 0; i < noOfRounds; i++) {
+                getPosts(limit, writer);
+            }
+            writer.close();
+
+            final FileWriter testWriter = new FileWriter(TEST_FILE);
+            getPosts(limit, testWriter);
+            testWriter.close();
+        } catch (final Exception e) {
+            logger.error("write to file error", e);
+        }
+    }
+
+    // ==== private
+
+    private void getPosts(int limit, FileWriter writer) {
+        String fullUrl = "http://www.reddit.com/r/" + subreddit + "/new.json?limit=" + limit;
+        if (postAfter != null) {
+            fullUrl += "&count=" + limit + "&after=" + postAfter;
+        }
+
+        try {
+            final JsonNode node = restTemplate.getForObject(fullUrl, JsonNode.class);
+            parseNode(node, writer);
+            Thread.sleep(3000);
+        } catch (final Exception e) {
+            logger.error("server error", e);
+        }
+
+    }
+
+    private void parseNode(JsonNode node, FileWriter writer) throws IOException {
+        postAfter = node.get("data").get("after").asText();
+        System.out.println(postAfter);
+        String line;
+        String category;
+        List<String> words;
+        final SimpleDateFormat df = new SimpleDateFormat("HH");
+        for (final JsonNode child : node.get("data").get("children")) {
+            category = (child.get("data").get("score").asInt() < minScore) ? "bad" : "good";
+            words = Splitter.onPattern("\\W").omitEmptyStrings().splitToList(child.get("data").get("title").asText());
+            final Date date = new Date(child.get("data").get("created_utc").asLong() * 1000);
+
+            line = category + ";";
+            line += df.format(date) + ";";
+            line += words.size() + ";" + Joiner.on(' ').join(words) + ";";
+            line += child.get("data").get("domain").asText() + "\n";
+
+            writer.write(line);
+        }
+    }
+
+    public static void main(String[] args) {
+        final RedditDataCollector collector = new RedditDataCollector();
+        collector.collectData();
+    }
+}

spring-security-oauth/src/main/java/org/baeldung/reddit/util/UserAgentInterceptor.java

@@ -0,0 +1,20 @@
+package org.baeldung.reddit.util;
+
+import java.io.IOException;
+
+import org.springframework.http.HttpHeaders;
+import org.springframework.http.HttpRequest;
+import org.springframework.http.client.ClientHttpRequestExecution;
+import org.springframework.http.client.ClientHttpRequestInterceptor;
+import org.springframework.http.client.ClientHttpResponse;
+
+public class UserAgentInterceptor implements ClientHttpRequestInterceptor {
+
+    @Override
+    public ClientHttpResponse intercept(HttpRequest request, byte[] body, ClientHttpRequestExecution execution) throws IOException {
+
+        final HttpHeaders headers = request.getHeaders();
+        headers.add("User-Agent", "Schedule with Reddit");
+        return execution.execute(request, body);
+    }
+}

spring-security-oauth/src/main/java/org/baeldung/web/RedditController.java

@@ -12,6 +12,7 @@ import org.baeldung.persistence.dao.PostRepository;
 import org.baeldung.persistence.dao.UserRepository;
 import org.baeldung.persistence.model.Post;
 import org.baeldung.persistence.model.User;
+import org.baeldung.reddit.classifier.RedditClassifier;
 import org.baeldung.reddit.util.RedditApiConstants;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
@@ -30,6 +31,7 @@ import org.springframework.web.bind.annotation.PathVariable;
 import org.springframework.web.bind.annotation.RequestMapping;
 import org.springframework.web.bind.annotation.RequestMethod;
 import org.springframework.web.bind.annotation.RequestParam;
+import org.springframework.web.bind.annotation.ResponseBody;
 import org.springframework.web.bind.annotation.ResponseStatus;
 
 import com.fasterxml.jackson.databind.JsonNode;
@@ -40,6 +42,7 @@ public class RedditController {
     private final Logger logger = LoggerFactory.getLogger(getClass());
 
     private static final SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm");
+    private final SimpleDateFormat dfHour = new SimpleDateFormat("HH");
 
     @Autowired
     private OAuth2RestTemplate redditRestTemplate;
@@ -50,6 +53,9 @@ public class RedditController {
     @Autowired
     private PostRepository postReopsitory;
 
+    @Autowired
+    private RedditClassifier redditClassifier;
+
     @RequestMapping("/login")
     public final String redditLogin() {
         final JsonNode node = redditRestTemplate.getForObject("https://oauth.reddit.com/api/v1/me", JsonNode.class);
@@ -122,6 +128,14 @@ public class RedditController {
         return "postListView";
     }
 
+    @RequestMapping(value = "/predicatePostResponse", method = RequestMethod.POST)
+    @ResponseBody
+    public final String predicatePostResponse(@RequestParam(value = "title") final String title, @RequestParam(value = "domain") final String domain) {
+        final int hour = Integer.parseInt(dfHour.format(new Date()));
+        final int result = redditClassifier.classify(redditClassifier.convertPost(title, domain, hour));
+        return (result == RedditClassifier.GOOD) ? "{Good Response}" : "{Bad response}";
+    }
+
     // === post actions
 
     @RequestMapping(value = "/deletePost/{id}", method = RequestMethod.DELETE)

spring-security-oauth/src/main/resources/test.csv

@@ -0,0 +1,100 @@
+bad;20;5;The President s Kill List;newyorker.com
+bad;20;8;Home stretch for the Ancient History Magazine Kickstarter;kickstarter.com
+good;20;20;A constant Burn to disk link under right click menu but there s no optical drive on retina Macbook Pro;i.imgur.com
+bad;20;8;Grey s be creeping on the button like;gph.is
+good;20;16;Droid Life First look at Moto 360 s Gorgeous and Impossible to Find Monolink Metal Band;droid-life.com
+bad;20;23;US Bleeding Hollow lt Unspoken gt has a couple spots open for our core team 3 7 M HM 10 10 H BRF;self.wowguilds
+bad;20;30;I drove up to Orlando for nothing I m by the science center What s some stuff I can do for cheap free so I don t waste my day;self.orlando
+bad;20;20;As we make computers more intelligent they ll eventually gain consciousness Then evolution would ve led to silicon based life;self.Showerthoughts
+bad;20;5;i am jealous and miserable;self.SuicideWatch
+bad;20;29;TIL that in addition to the recent gyrocopter landing the last person to land a helicopter on the White House or U S Capital lawn was also a Floridian;reddit.com
+good;20;7;When we finally arrived at Comic Con;i.imgur.com
+good;20;22;Just got a call that my OBGYN is out on an emergency for the next week I m being induced this Saturday;self.BabyBumps
+good;20;10;Scientists discover intense magnetic field close to supermassive black hole;sciencedaily.com
+bad;20;2;W ow;fap.to
+bad;20;8;Wedding Photographers did you love your wedding photographer;self.WeddingPhotography
+bad;20;38;This video reminds me of the hype in this sub for a Fallout 4 in New York Even though the style is a bit WAY off Most of the characters are a bit similar to the Fallout series;youtube.com
+good;20;6;Max the animatronic abandoned at Disney;i.imgur.com
+bad;20;2;Francia Expansions;self.HistoricalWorldPowers
+bad;20;10;When you learn autotools and discover all am in files;youtube.com
+good;20;1;Instincts;i.imgur.com
+bad;20;6;No more bing rewards for searches;self.beermoney
+bad;20;7;Launcher stops working when signing in HELP;self.GTAV
+bad;20;15;I m new to the gym amp changing my diet but I m loving it;self.loseit
+bad;20;9;Forbes The Chevy Bolt Tesla s Best News Yet;forbes.com
+bad;20;12;Forth Rail Bridge obscured by fog OS 720x720 x post r ScottishPhotos;i.imgur.com
+bad;20;2;Background score;self.Daredevil
+bad;20;4;To MIT Media Lab;bitcoin-gr.org
+good;20;3;Havana Street Art;self.cigars
+bad;20;4;Gear PRS Custom 24;self.Guitar
+bad;20;34;US Calif Co own a home with SO not married for 2 years Now we are breaking up and she only wants to give me my original down pymt instead of buying me out;self.legaladvice
+good;20;6;There s been a fur der;imgur.com
+good;20;17;ICA Use A Test Website UI Greg Miaskiewicz 0 40 1 5 min gt 95 gt 500;self.HITsWorthTurkingFor
+bad;20;8;balloon popping sound in 5 4 3 2;i.imgur.com
+good;20;12;My attempt at recreating the Imperial Insignia in the new teaser trailer;imgur.com
+bad;20;10;This is the most important thing on the internet today;youtu.be
+bad;20;6;A R Kane and Dirty Beaches;self.ambient
+bad;20;10;What is a good hot air soldering for a hobbyist;self.AskElectronics
+bad;20;8;Falconshield This Is War 4 Freljord COLLAB draggles;np.reddit.com
+bad;20;3;Sacramento home appraiser;sacramentovalleyappraisal.com
+bad;20;10;FIRST WALK OFF OF THE YEAR UPVOTE PARTY r CHICubs;reddit.com
+bad;20;23;Ukrainian notables politicians journalists react to murder of Kalashnikov and Buzhina See their fb posts in link Most popular opinion Putin did it;pravda.com.ua
+bad;20;4;Maclock watch for sale;self.MacMiller
+bad;20;2;me irl;imgur.com
+bad;20;7;Looking to recruit EU Aliance Outland BCH;self.wowraf
+bad;20;10;Trying to understand potential of the restaurant food truck industry;self.Entrepreneur
+bad;20;3;Democracy Now Bitcoin;bitcoin-gr.org
+good;20;4;Got pulled over today;self.motorcycles
+bad;20;7;ESPN Reporter Britt McHenry is a shitlord;liveleak.com
+bad;20;15;I m looking for places to buy local craft beers by the bottle Any suggestions;self.dayton
+bad;20;5;No username in login screen;self.techsupport
+good;20;7;Ads for the upcoming election in Alberta;youtube.com
+bad;20;11;Michael Savage Hillary Clinton s Looks Alone Could Sink The Campaign;rightwingwatch.org
+good;20;4;Another from People Magazine;imgur.com
+bad;20;10;ps4 LF2 CE CROTA CP need sword bearer Psn blackskyes;self.Fireteams
+bad;20;4;Dealing with Cho mid;self.summonerschool
+bad;20;3;C 3P0 Question;self.XWingTMG
+bad;20;10;DUNGEON HUNTER 5 HACK AND CHEATS TOOL RESOURCES GENERATOR UTILITY;self.maxgiron
+bad;20;11;I m searching for mature anime genre is not too relevant;self.Animesuggest
+bad;20;3;Cassie s hair;self.MortalKombat
+bad;20;6;Ha Ha Ha Ha 0 02;youtube.com
+bad;20;8;Can someone make a simple I hope profile;self.ChromaProfiles
+bad;20;5;I can t reinstall SMITE;self.Smite
+bad;20;19;TIL That in 1974 a US Army Private stole a helicopter and landed it at the White House Twice;en.wikipedia.org
+good;20;2;Rottweiler pup;imgur.com
+good;20;4;New stealth Bonnaroo additions;self.bonnaroo
+bad;20;5;Any Houston Rockets fans here;self.Eugene
+good;20;10;Pictures of Tube Televisions the moment they re Turned Off;imgur.com
+bad;20;10;Camping this summer with a 9 5 month old Tips;self.beyondthebump
+good;20;15;Toss this into your old 1 4 7 based packs to improve falling block rendering;minecraftforum.net
+good;20;13;StreetPass Thank You Bundle takes EXTRA 1 off the new Mii Plaza games;technologytell.com
+good;20;11;First Step of Becoming a Real Sissy M m F m;self.gonewildstories
+good;20;10;Big BART delays after apparent suicide at Civic Center station;sfgate.com
+bad;20;5;tornado sirens in northwest suburbs;self.Minneapolis
+good;20;2;Me irl;i.imgur.com
+bad;20;13;Kimi Raikkonen hints at Ferrari stay in 2016 if the team wants him;espn.co.uk
+bad;20;16;If you had to Explain a game of LoL in one Analogy what would it be;self.leagueoflegends
+good;20;6;What is your guilty pleasure song;self.AskReddit
+bad;20;14;Suggestion Don t unlock the next unit until you can afford to buy it;self.swarmsim
+good;20;1;Metal;imgur.com
+bad;20;6;TheFatRat Time Lapse House Electro 2015;soundcloud.com
+bad;20;22;Hey Reddit is it true that the silver fillings dentists put in our teeth contains mercury and could be harmful over time;self.AskReddit
+good;20;5;request Will Photoshop For Pizza;self.RandomActsOfPizza
+bad;20;13;My wife likes to put small things on the big thing shelf fixed;i.imgur.com
+bad;20;14;Mi novio es de M xico y quiero practicar con l pero estoy nerviosa;self.SpanishImmersion
+bad;20;5;Anybody have experience with PageFair;self.adops
+good;20;23;Osoba na snimci kriva je za nekoliko kra a bicikala po Zagrebu pa tako i maznuo jedan mom frendu Ako ga prepoznajete javite;youtube.com
+bad;20;9;Grogheads com Brother Against Brother The AAR Part 1;grogheads.com
+good;20;29;St Bernadette Soubirous Feast April 16th outside of France One of the many Incorrupt Saints She looked upon the face of the Blessed Virgin Mary 18 times at Lourdes;en.lourdes-france.org
+bad;20;18;My mom texted asking what food I want in the fridge including my preferred flavor of Greek yogurt;i.imgur.com
+good;20;18;Spoilers All If Dragon Age II had a subtitle s like Origins and Inquisition what would it be;self.dragonage
+bad;20;5;Best hidden places on campus;self.IndianaUniversity
+bad;20;8;Rematch Snack Santa Snackta is wonderful and generous;redditgifts.com
+bad;20;13;Half Of Yemen s Population Is Going Hungry As Violence Worsens UN Says;huffingtonpost.com
+good;20;6;RBC Heritage Round 1 Live Thread;self.dfsports
+bad;20;7;Feeling full all the time swollen liver;self.stopdrinking
+bad;20;9;Recent events for MLP Zero Hard treasure trail completed;self.TrueLionhearts
+bad;20;5;PS4 LF2 for NF Weekly;self.Fireteams
+bad;20;5;Stardust with Ocular by yitaku;soundcloud.com
+bad;20;4;PC M9 Bayonet Slaughter;self.GlobalOffensiveTrade
+good;20;2;Spare food;self.tampa

spring-security-oauth/src/main/webapp/WEB-INF/jsp/submissionForm.jsp

@@ -76,9 +76,35 @@ border-color: #ddd;
     <img src="http://www.reddit.com/captcha/${iden}" alt="captcha" width="200"/>
     </c:if>
     <br><br>
-    <span class="col-sm-3"><button type="submit" class="btn btn-primary">Post</button></span>
+    <span class="col-sm-3"><button id="submitbtn" type="submit" class="btn btn-primary">Post</button></span>
    </div>
 </form>
+<div>
+<button id="checkbtn" class="btn btn-default disabled" onclick="predicateResponse()">Predicate Response</button>
+<span id="prediction"></span>
+
+<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.11.2/jquery.min.js"></script>
+<script type="text/javascript">
+$("input").change(function() {
+    if($("#submitbtn").hasClass("disabled")){
+    	if(! $("#checkbtn").hasClass("disabled")){
+    		$("#checkbtn").addClass("disabled");
+    	}
+    }else{
+    	$("#checkbtn").removeClass("disabled");
+    }
+});
+function predicateResponse(){
+	var title = $('input[name="title"]').val();
+	var domain = $('input[name="url"]').val();
+	domain =  $('<a>').prop('href', domain).prop('hostname');
+	console.log(domain);
+	$.post("<c:url value="/predicatePostResponse"></c:url>",{title: title, domain: domain} ,function(data){
+        $("#prediction").addClass("alert alert-info").html(data.replace('{','').replace('}',''));
+    });
+}
+</script>
+</div>
 </div>
 </body>
 </html>

spring-security-oauth/src/test/java/org/baeldung/classifier/RedditClassifierTest.java

@@ -0,0 +1,28 @@
+package org.baeldung.classifier;
+
+import static org.junit.Assert.assertTrue;
+
+import java.io.IOException;
+
+import org.baeldung.reddit.classifier.RedditClassifier;
+import org.baeldung.reddit.classifier.RedditDataCollector;
+import org.junit.Before;
+import org.junit.Test;
+
+public class RedditClassifierTest {
+
+    private RedditClassifier classifier;
+
+    @Before
+    public void init() throws IOException {
+        classifier = new RedditClassifier();
+        classifier.trainClassifier(RedditDataCollector.TRAINING_FILE);
+    }
+
+    @Test
+    public void testClassifier() throws IOException {
+        final double result = classifier.evaluateClassifier();
+        System.out.println("Accuracy = " + result);
+        assertTrue(result > 0.8);
+    }
+}