chris@1: /*
chris@1:  *   SONEWS News Server
chris@1:  *   see AUTHORS for the list of contributors
chris@1:  *
chris@1:  *   This program is free software: you can redistribute it and/or modify
chris@1:  *   it under the terms of the GNU General Public License as published by
chris@1:  *   the Free Software Foundation, either version 3 of the License, or
chris@1:  *   (at your option) any later version.
chris@1:  *
chris@1:  *   This program is distributed in the hope that it will be useful,
chris@1:  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
chris@1:  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
chris@1:  *   GNU General Public License for more details.
chris@1:  *
chris@1:  *   You should have received a copy of the GNU General Public License
chris@1:  *   along with this program.  If not, see <http://www.gnu.org/licenses/>.
chris@1:  */
chris@1: 
chris@1: package org.sonews.feed;
chris@1: 
chris@1: import java.io.IOException;
chris@1: import java.util.concurrent.ConcurrentLinkedQueue;
chris@3: import org.sonews.storage.Article;
chris@3: import org.sonews.storage.Headers;
chris@1: import org.sonews.util.Log;
chris@1: import org.sonews.util.io.ArticleWriter;
chris@1: 
chris@1: /**
chris@1:  * Pushes new articles to remote newsservers. This feeder sleeps until a new
chris@1:  * message is posted to the sonews instance.
chris@1:  * @author Christian Lins
chris@1:  * @since sonews/0.5.0
chris@1:  */
chris@1: class PushFeeder extends AbstractFeeder
chris@1: {
chris@1:   
chris@1:   private ConcurrentLinkedQueue<Article> articleQueue = 
chris@1:     new ConcurrentLinkedQueue<Article>();
chris@1:   
chris@1:   @Override
chris@1:   public void run()
chris@1:   {
chris@1:     while(isRunning())
chris@1:     {
chris@1:       try
chris@1:       {
chris@1:         synchronized(this)
chris@1:         {
chris@1:           this.wait();
chris@1:         }
chris@1:         
chris@1:         Article  article = this.articleQueue.poll();
chris@1:         String[] groups  = article.getHeader(Headers.NEWSGROUPS)[0].split(",");
cli@15:         Log.get().info("PushFeed: " + article.getMessageID());
chris@1:         for(Subscription sub : this.subscriptions)
chris@1:         {
chris@1:           // Circle check
chris@1:           if(article.getHeader(Headers.PATH)[0].contains(sub.getHost()))
chris@1:           {
cli@15:             Log.get().info(article.getMessageID() + " skipped for host "
cli@15:               + sub.getHost());
chris@1:             continue;
chris@1:           }
chris@1: 
chris@1:           try
chris@1:           {
chris@1:             for(String group : groups)
chris@1:             {
chris@1:               if(sub.getGroup().equals(group))
chris@1:               {
chris@1:                 // Delete headers that may cause problems
chris@1:                 article.removeHeader(Headers.NNTP_POSTING_DATE);
chris@1:                 article.removeHeader(Headers.NNTP_POSTING_HOST);
chris@1:                 article.removeHeader(Headers.X_COMPLAINTS_TO);
chris@1:                 article.removeHeader(Headers.X_TRACE);
chris@1:                 article.removeHeader(Headers.XREF);
chris@1:                 
chris@1:                 // POST the message to remote server
chris@1:                 ArticleWriter awriter = new ArticleWriter(sub.getHost(), sub.getPort());
chris@1:                 awriter.writeArticle(article);
chris@1:                 break;
chris@1:               }
chris@1:             }
chris@1:           }
chris@1:           catch(IOException ex)
chris@1:           {
cli@15:             Log.get().warning(ex.toString());
chris@1:           }
chris@1:         }
chris@1:       }
chris@1:       catch(InterruptedException ex)
chris@1:       {
cli@15:         Log.get().warning("PushFeeder interrupted: " + ex);
chris@1:       }
chris@1:     }
chris@1:   }
chris@1:   
chris@1:   public void queueForPush(Article article)
chris@1:   {
chris@1:     this.articleQueue.add(article);
chris@1:     synchronized(this)
chris@1:     {
chris@1:       this.notifyAll();
chris@1:     }
chris@1:   }
chris@1:   
chris@1: }