war/src/main/java/pnews/servlet/ArticleProvider.java

   1 package pnews.servlet;
   2
   3 import java.io.IOException;
   4 import java.io.InputStream;
   5 import java.net.MalformedURLException;
   6 import java.net.URL;
   7 import java.util.ArrayList;
   8 import java.util.Collections;
   9 import java.util.Comparator;
  10 import java.util.Date;
  11 import java.util.HashMap;
  12 import java.util.List;
  13 import java.util.Map;
  14 import java.util.concurrent.Executors;
  15 import java.util.concurrent.ScheduledExecutorService;
  16 import java.util.concurrent.TimeUnit;
  17 import java.util.logging.Level;
  18 import java.util.logging.Logger;
  19
  20 import org.jsoup.Jsoup;
  21
  22 import com.rometools.rome.feed.synd.SyndEnclosure;
  23 import com.rometools.rome.feed.synd.SyndEntry;
  24 import com.rometools.rome.feed.synd.SyndFeed;
  25 import com.rometools.rome.io.FeedException;
  26 import com.rometools.rome.io.SyndFeedInput;
  27 import com.rometools.rome.io.XmlReader;
  28
  29 import pnews.Article;
  30 import pnews.Category;
  31
  32 public class ArticleProvider {
  33         public final static ArticleProvider singleton = new ArticleProvider();
  34         private static final Logger LOG = Logger.getLogger(ArticleProvider.class.getName());
  35         private final Map<Category, List<Article>> articlesByCategory = new HashMap<>();
  36         private final ScheduledExecutorService scheduler = Executors.newScheduledThreadPool(2);
  37
  38         private ArticleProvider() {
  39                 for (Category cat:Category.values())
  40                         scheduler.scheduleAtFixedRate(new Refresher(cat), 2, 600, TimeUnit.SECONDS);
  41         }
  42
  43         private static SyndFeed getSyndFeed(String u) throws IllegalArgumentException, FeedException, MalformedURLException, IOException {
  44                 InputStream is;
  45                 XmlReader r;
  46
  47                 r = new XmlReader(new URL(u));
  48                 XmlReader.setDefaultEncoding("UTF-8");
  49
  50                 return new SyndFeedInput().build(r);
  51
  52         }
  53
  54         private static Map<Category, String[]> getFeeds() {
  55                 Map<Category, String[]> result;
  56
  57                 result = new HashMap<>();
  58
  59                 result.put(Category.TOP,
  60                            new String[] {
  61                                            "http://www.francetvinfo.fr/titres.rss",
  62                                            "http://www.rfi.fr/general/rss",
  63                                            "http://www.cnews.fr/rss/une",
  64                                            "http://www.ladepeche.fr/rss/a-la-une.rss",
  65                                            "https://www.franceinter.fr/rss/a-la-une.xml",
  66                                            "https://www.francebleu.fr/rss/a-la-une.xml",
  67                                            "http://www.bfmtv.com/rss/info/flux-rss/flux-toutes-les-actualites/"
  68                            });
  69
  70                 result.put(Category.SPORT,
  71                                 new String[] { "http://www.france24.com/fr/sports/rss" });
  72
  73                 result.put(Category.FRANCE,
  74                                 new String[] { "http://www.france24.com/fr/france/rss",
  75                                                "http://www.rfi.fr/france/rss"});
  76
  77                 result.put(Category.EUROPE,
  78                                 new String[] { "http://www.france24.com/fr/europe/rss" });
  79
  80                 result.put(Category.MONDE,
  81                            new String[] { "http://www.france24.com/fr/actualites/rss" });
  82
  83
  84                 result.put(Category.ECO,
  85                                 new String[] { "http://www.france24.com/fr/economie/rss",
  86                                                "http://www.rfi.fr/economie/rss" });
  87
  88                 result.put(Category.ESSONNE,
  89                                 new String[] { "http://www.tourisme-essonne.com/rss/actus/",
  90                                                "http://www.ville-palaiseau.fr/rss/actualites.htm"
  91                                                 /*"https://www.essonneinfo.fr/feed/"*/ });
  92
  93                 result.put(Category.PEOPLE,
  94                                 new String[] { "http://www.premiere.fr/rss/actu-live",
  95                                                "http://www.purepeople.com/rss/news_t0.xml"
  96                 });
  97
  98                 result.put(Category.TECHNOLOGIE,
  99                                 new String[] { "http://feeds.feedburner.com/lesnumeriques/news",
 100                                                "http://www.zdnet.fr/feeds/rss/actualites/"});
 101
 102                 return result;
 103         }
 104
 105         private void addArticles(Category cat, SyndFeed feed) {
 106                 String thumbnail;
 107                 String desc, link, title, feedTitle, feedImage;
 108                 Date date;
 109                 List<Article> articles;
 110                 boolean exist;
 111
 112                 feedTitle = feed.getTitle().trim();
 113
 114                 if (feed.getImage() != null)
 115                         feedImage = feed.getImage().getUrl();
 116                 else
 117                         feedImage = null;
 118
 119                 LOG.info("addArticles " + cat.getId() + " " + feedTitle + " number of articles: " + feed.getEntries().size());
 120
 121                 for (SyndEntry entry: feed.getEntries()) {
 122                         thumbnail = null;
 123                         for (SyndEnclosure e: entry.getEnclosures()) {
 124                                 if (e.getType().startsWith("image/"))
 125                                         thumbnail = e.getUrl();
 126                                 break;
 127                         }
 128                         if (thumbnail == null)
 129                                 thumbnail = feedImage;
 130
 131                         title = entry.getTitle().trim();
 132
 133                         if (entry.getDescription() != null) {
 134                                 desc = Jsoup.parse(entry.getDescription().getValue()).text();
 135                         } else {
 136                                 desc = null;
 137                                 LOG.severe("No description for " + feedTitle + " - " + title);
 138                         }
 139
 140                         date = entry.getPublishedDate();
 141                         if (date == null)
 142                                 date = entry.getUpdatedDate();
 143                         if (date == null) {
 144                                 LOG.severe("The article " + feedTitle + " - " + title + " does not have a date");
 145                                 continue;
 146                         }
 147
 148                         synchronized(articlesByCategory) {
 149                                 link = entry.getLink().trim();
 150
 151                                 articles = articlesByCategory.get(cat);
 152                                 exist = false;
 153                                 if (articles == null) {
 154                                         articles = new ArrayList<>();
 155                                         articlesByCategory.put(cat, articles);
 156                                 } else {
 157                                         for (Article a: articles)
 158                                                 if (a.link.equals(link)) {
 159                                                         LOG.fine("addArticles " + link + " is already present");
 160                                                         exist = true;
 161                                                 }
 162                                 }
 163
 164                                 if (!exist) {
 165                                         LOG.fine("add " + cat.getId() + " " + feedTitle + " " + title);
 166
 167                                         articles.add(new Article(link, cat, title, desc, thumbnail, date,
 168                                                         feed.getTitle()));
 169
 170                                         Collections.sort(articles, new Comparator<Article>() {
 171                                                 @Override
 172                                                 public int compare(Article o1, Article o2) {
 173                                                         return o2.publicationDate.compareTo(o1.publicationDate);
 174                                                 }
 175
 176                                         });
 177                                 } else {
 178                                         LOG.finest("addArticles already exist: " + title);
 179                                 }
 180                         }
 181                 }
 182
 183                 LOG.info("addArticles done " + cat.getId());
 184         }
 185
 186         private void retrieveArticles(Category cat) throws IllegalArgumentException, MalformedURLException, FeedException, IOException {
 187                 String[] feeds;
 188
 189                 feeds = getFeeds().get(cat);
 190
 191                 if (feeds != null)
 192                         for (String str: feeds)
 193                                 try {
 194                                         addArticles(cat, getSyndFeed(str));
 195                                 } catch (Throwable e) {
 196                                         LOG.log(Level.SEVERE,
 197                                                 "retrieveArticles failure " + cat.getId() + " " + str,
 198                                                 e);
 199                                 }
 200                 else
 201                         LOG.severe("No feed for category " + cat);
 202         }
 203
 204         public List<Article> getArticles(Category cat)
 205                         throws IllegalArgumentException, MalformedURLException, FeedException, IOException {
 206                 synchronized (articlesByCategory) {
 207                         return articlesByCategory.get(cat);
 208                 }
 209         }
 210
 211         private class Refresher implements Runnable {
 212                 private final Category category;
 213
 214                 public Refresher(Category category) {
 215                         this.category = category;
 216                 }
 217
 218                 @Override
 219                 public void run() {
 220                         List<Article> articles;
 221
 222                         LOG.info("refresher "+ category.getId());
 223
 224                         try {
 225                                 retrieveArticles(category);
 226
 227                                 synchronized (articlesByCategory) {
 228                                         articles = articlesByCategory.get(category);
 229                                         if (articles != null && articles.size() > 100) {
 230                                                 articlesByCategory.put(category,
 231                                                                        articles.subList(0, 100));
 232
 233                                         }
 234                                         LOG.info("refresher " + category.getId() + " number of articles: " + articles.size());
 235                                 }
 236                         } catch (IllegalArgumentException | FeedException | IOException e) {
 237                                 LOG.log(Level.SEVERE, "refresher failure", e);
 238                         }
 239
 240                         LOG.info("refresher "+ category.getId() + " done");
 241                 }
 242         }
 243 }