+++ /dev/null
-package pnews.servlet;
-
-import java.io.IOException;
-import java.net.MalformedURLException;
-import java.net.URL;
-import java.time.Instant;
-import java.time.temporal.ChronoUnit;
-import java.util.ArrayList;
-import java.util.Collections;
-import java.util.Comparator;
-import java.util.Date;
-import java.util.HashMap;
-import java.util.List;
-import java.util.Map;
-import java.util.concurrent.Executors;
-import java.util.concurrent.ScheduledExecutorService;
-import java.util.concurrent.TimeUnit;
-import java.util.logging.Level;
-import java.util.logging.Logger;
-
-import org.jsoup.Jsoup;
-
-import com.rometools.rome.feed.synd.SyndEnclosure;
-import com.rometools.rome.feed.synd.SyndEntry;
-import com.rometools.rome.feed.synd.SyndFeed;
-import com.rometools.rome.io.FeedException;
-import com.rometools.rome.io.SyndFeedInput;
-import com.rometools.rome.io.XmlReader;
-
-import net.wpitchoune.pnews.Article;
-import net.wpitchoune.pnews.ArticleStore;
-import net.wpitchoune.pnews.Category;
-import net.wpitchoune.pnews.Config;
-import net.wpitchoune.pnews.EntityStat;
-import net.wpitchoune.pnews.Feed;
-import net.wpitchoune.pnews.classifier.NamedEntityRecognizer;
-
-public class ArticleProvider {
- private static final String CLASS_NAME = ArticleProvider.class.getName();
- private static final Logger LOG = Logger.getLogger(CLASS_NAME);
- private final Map<Category, List<Article>> articlesByCategory = new HashMap<>();
- private final ScheduledExecutorService scheduler = Executors.newScheduledThreadPool(Runtime.getRuntime().availableProcessors());
- private final Config config;
-
- public ArticleProvider(Config config) {
- this.config = config;
- for (Category cat: config.getCategories())
- scheduler.scheduleAtFixedRate(new Refresher(cat), 2, 600, TimeUnit.SECONDS);
- }
-
- private static SyndFeed getSyndFeed(String u) throws IllegalArgumentException, FeedException, MalformedURLException, IOException {
- XmlReader r;
-
- r = new XmlReader(new URL(u));
-
- return new SyndFeedInput().build(r);
- }
-
- private List<Article> getArticlesForUpdate(Category cat) {
- List<Article> result;
-
- synchronized (articlesByCategory) {
- result = articlesByCategory.get(cat);
- if (result == null) {
- result = new ArrayList<>();
- articlesByCategory.put(cat, result);
- }
- return result;
- }
- }
-
- private boolean exists(String articleLink, List<Article> articles) {
- synchronized (articles) {
- for (Article a: articles)
- if (a.getLink().equals(articleLink))
- return true;
- }
- return false;
- }
-
- private Instant getArticleInstant(SyndEntry entry) {
- Date date;
-
- date = entry.getUpdatedDate();
- if (date == null)
- date = entry.getPublishedDate();
-
- if (date == null)
- return Instant.now();
-
- return date.toInstant();
- }
-
- private Article toArticle(String link, SyndEntry entry, SyndFeed feed, String lang, Instant instant) {
- String desc, title, thumbnail, feedTitle, str;
- List<String> entities;
-
- feedTitle = feed.getTitle();
- if (feedTitle != null) {
- feedTitle = feedTitle.trim();
- }
-
- thumbnail = null;
- for (SyndEnclosure e: entry.getEnclosures()) {
- if (e.getType().startsWith("image/"))
- thumbnail = e.getUrl();
- break;
- }
-
- title = entry.getTitle().trim();
-
- if (entry.getDescription() != null) {
- str = entry.getDescription().getValue();
- desc = Jsoup.parse(str).text();
- } else {
- desc = null;
- LOG.severe("No description for " + feedTitle + " - " + title);
- }
-
- entities = new ArrayList<>();
- if (lang.equals("en"))
- try {
- NamedEntityRecognizer.classify(title, entities, config);
- if (desc != null)
- NamedEntityRecognizer.classify(desc, entities, config);
- } catch (ClassCastException | ClassNotFoundException | IOException e1) {
- LOG.log(Level.SEVERE, "Cannot classify " + feedTitle, e1);
- }
-
- return new Article(link, title, desc, thumbnail, instant, feedTitle, entities.toArray(new String[0]));
- }
-
- private void addArticles(Category cat, SyndFeed feed) {
- String feedTitle;
- List<Article> articles;
- Article a;
-
- feedTitle = feed.getTitle().trim();
-
- LOG.info("addArticles " + cat.getLabel() + " " + feedTitle + " number of articles: " + feed.getEntries().size());
-
- for (SyndEntry entry: feed.getEntries()) {
- String link = entry.getLink().trim();
- articles = getArticlesForUpdate(cat);
- if (exists(link, articles)) {
- LOG.fine("addArticles " + link + " is already present");
- continue ;
- }
-
- final Instant instant = getArticleInstant(entry);
-
- if (config.isObsolete(instant))
- continue ;
-
- a = ArticleStore.singleton.getArticle(link, ()->toArticle(link, entry, feed, cat.getLanguage(), instant));
-
- synchronized (articles) {
- articles.add(a);
-
- Collections.sort(articles, new Comparator<Article>() {
- @Override
- public int compare(Article o1, Article o2) {
- if (o1.getPublicationDate() == o2.getPublicationDate())
- return 0;
- if (o1.getPublicationDate() == null)
- return 1;
- if (o2.getPublicationDate() == null)
- return -1;
- return o2.getPublicationDate().compareTo(o1.getPublicationDate());
- }
- });
- }
- }
-
- LOG.info("addArticles done " + cat.getLabel());
- }
-
- private void retrieveArticles(Category cat) throws IllegalArgumentException, MalformedURLException, FeedException, IOException {
- List<Feed> feeds;
-
- feeds = config.getFeedsByCategory().get(cat);
-
- if (feeds != null)
- for (Feed f: feeds)
- try {
- addArticles(cat, getSyndFeed(f.getURL()));
- } catch (Throwable e) {
- LOG.log(Level.SEVERE,
- "retrieveArticles failure " + cat.getLabel() + " " + f.toString(),
- e);
- }
- else
- LOG.severe("No feed for category " + cat);
- }
-
- /**
- * Returns a copy.
- */
- public List<Article> getArticles(Category cat, String entity)
- throws IllegalArgumentException, MalformedURLException, FeedException, IOException {
- List<Article> articles, result;
-
- synchronized (articlesByCategory) {
- articles = getArticlesForUpdate(cat);
- }
-
- synchronized (articles) {
- if (entity == null)
- return new ArrayList<>(articles);
-
- result = new ArrayList<>(articles.size());
- for (Article a: articles)
- if (a.hasEntity(entity))
- result.add(a);
-
- return result;
- }
- }
-
- public List<EntityStat> getEntityStats(Category cat) throws IllegalArgumentException, MalformedURLException, FeedException, IOException {
- List<Article> articles;
- Map<String, EntityStat> entities;
- final String FUNCTION_NAME = "getEntities";
- EntityStat s;
- List<EntityStat> stats;
- Instant minInstant;
-
- LOG.entering(CLASS_NAME, FUNCTION_NAME, cat);
-
- articles = getArticles(cat, null);
-
- minInstant = Instant.now().minus(15, ChronoUnit.DAYS);
-
- entities = new HashMap<>();
- for (Article a: articles)
- if (a.getPublicationDate().isAfter(minInstant) && a.getEntities() != null)
- for (String e: a.getEntities()) {
- s = entities.get(e);
- if (s == null) {
- s = new EntityStat(e);
- entities.put(e, s);
- }
- s.increment();
- }
-
- stats = new ArrayList<>(entities.values());
- stats.sort(new Comparator<EntityStat>() {
-
- @Override
- public int compare(EntityStat o1, EntityStat o2) {
- return Integer.compare(o2.getCount(), o1.getCount());
- }
-
- });
-
- LOG.exiting(CLASS_NAME, FUNCTION_NAME, stats);
-
- return stats;
- }
-
- private class Refresher implements Runnable {
- private final Category category;
-
- public Refresher(Category category) {
- this.category = category;
- }
-
- @Override
- public void run() {
- LOG.info("refresher "+ category.getLabel());
-
- try {
- retrieveArticles(category);
- } catch (IllegalArgumentException | FeedException | IOException e) {
- LOG.log(Level.SEVERE, "refresher failure", e);
- }
-
- LOG.info("refresher "+ category.getLabel() + " done");
- }
- }
-}
projects / pnews.git / blobdiff