[jboss-cvs] jboss-seam/examples/wiki/src/main/org/jboss/seam/wiki/core/ui ...

[Christian Bauer]

  User: cbauer  
  Date: 07/04/08 11:10:35

  Modified:    examples/wiki/src/main/org/jboss/seam/wiki/core/ui  
                        FileServlet.java
  Added:       examples/wiki/src/main/org/jboss/seam/wiki/core/ui  
                        FeedServlet.java
  Log:
  Implemented Atom feeds for site and directories
  
  Revision  Changes    Path
  1.6       +0 -0      jboss-seam/examples/wiki/src/main/org/jboss/seam/wiki/core/ui/FileServlet.java
  
  (In the diff below, changes in quantity of whitespace are not shown.)
  
  
  
  
  1.1      date: 2007/04/08 15:10:35;  author: cbauer;  state: Exp;jboss-seam/examples/wiki/src/main/org/jboss/seam/wiki/core/ui/FeedServlet.java
  
  Index: FeedServlet.java
  ===================================================================
  package org.jboss.seam.wiki.core.ui;
  
  import com.sun.syndication.feed.synd.*;
  import com.sun.syndication.io.SyndFeedOutput;
  import org.jboss.seam.Component;
  import org.jboss.seam.util.Transactions;
  import org.jboss.seam.wiki.core.dao.FeedDAO;
  import org.jboss.seam.wiki.core.model.Feed;
  import org.jboss.seam.wiki.core.model.FeedEntry;
  
  import javax.servlet.ServletException;
  import javax.servlet.http.HttpServlet;
  import javax.servlet.http.HttpServletRequest;
  import javax.servlet.http.HttpServletResponse;
  import javax.transaction.UserTransaction;
  import java.io.IOException;
  import java.util.ArrayList;
  import java.util.HashMap;
  import java.util.List;
  import java.util.Map;
  
  public class FeedServlet extends HttpServlet {
  
      private Map<String,String> feedTypes = new HashMap<String,String>() {{
          put("/atom.seam", "atom_1.0");
          // TODO: Support more of these... also need to consider setContentType() ... put("/rss.seam", "rss_2.0");
      }};
  
      public FeedServlet() {}
  
      @Override
      protected void doGet(HttpServletRequest request, HttpServletResponse response)
              throws ServletException, IOException {
  
          String pathInfo = request.getPathInfo();
          String feedId = request.getParameter("feedId");
  
          if (!feedTypes.containsKey(pathInfo)) return;
          String feedType = feedTypes.get(pathInfo);
          if (feedId == null) return;
  
          // TODO: Seam should use its transaction interceptor for java beans: http://jira.jboss.com/jira/browse/JBSEAM-957
          UserTransaction userTx = null;
          boolean startedTx = false;
          try {
              userTx = Transactions.getUserTransaction();
              if (userTx.getStatus() != javax.transaction.Status.STATUS_ACTIVE) {
                  startedTx = true;
                  userTx.begin();
              }
  
  
              FeedDAO feedDAO = (FeedDAO)Component.getInstance("feedDAO");
              Feed feed = feedDAO.findFeed(Long.valueOf(feedId));
              if (feed == null) return;
  
              // Create feed
              SyndFeed syndFeed = new SyndFeedImpl();
              syndFeed.setFeedType(feedType);
              syndFeed.setTitle(feed.getTitle());
              syndFeed.setLink(request.getRequestURL().toString());
              syndFeed.setDescription(feed.getDescription());
  
              // Create feed entries
              List<SyndEntry> syndEntries = new ArrayList<SyndEntry>();
              List<FeedEntry> entries = feedDAO.findFeedEntries(feed);
              for (FeedEntry entry : entries) {
                  SyndEntry syndEntry;
                  SyndContent description;
                  syndEntry = new SyndEntryImpl();
                  syndEntry.setTitle(entry.getTitle());
                  syndEntry.setLink(entry.getLink());
                  syndEntry.setAuthor(entry.getAuthor());
                  syndEntry.setPublishedDate(entry.getPublishedDate());
                  syndEntry.setUpdatedDate(entry.getUpdatedDate());
                  description = new SyndContentImpl();
                  description.setType(entry.getDescriptionType());
                  description.setValue(entry.getDescriptionValue());
                  syndEntry.setDescription(description);
                  syndEntries.add(syndEntry);
              }
              syndFeed.setEntries(syndEntries);
  
              // Write feed to output
              response.setContentType("application/atom+xml"); // TODO: Make this more flexible
              SyndFeedOutput output = new SyndFeedOutput();
              output.output(syndFeed, response.getWriter());
              response.getWriter().flush();
  
              if (startedTx) userTx.commit();
          } catch (Exception ex) {
              try {
                  if (startedTx) userTx.rollback();
              } catch (Exception rbEx) {
                  rbEx.printStackTrace();
              }
              throw new RuntimeException(ex);
          }
      }
  
  }