1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/trunk/com/so/news/storage/Purger.java	Tue Jan 20 10:21:03 2009 +0100
     1.3 @@ -0,0 +1,96 @@
     1.4 +/*
     1.5 + *   StarOffice News Server
     1.6 + *   see AUTHORS for the list of contributors
     1.7 + *
     1.8 + *   This program is free software: you can redistribute it and/or modify
     1.9 + *   it under the terms of the GNU General Public License as published by
    1.10 + *   the Free Software Foundation, either version 3 of the License, or
    1.11 + *   (at your option) any later version.
    1.12 + *
    1.13 + *   This program is distributed in the hope that it will be useful,
    1.14 + *   but WITHOUT ANY WARRANTY; without even the implied warranty of
    1.15 + *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    1.16 + *   GNU General Public License for more details.
    1.17 + *
    1.18 + *   You should have received a copy of the GNU General Public License
    1.19 + *   along with this program.  If not, see <http://www.gnu.org/licenses/>.
    1.20 + */
    1.21 +
    1.22 +package com.so.news.storage;
    1.23 +
    1.24 +import java.util.Date;
    1.25 +
    1.26 +import com.so.news.Config;
    1.27 +import com.so.news.Debug;
    1.28 +
    1.29 +/**
    1.30 + * The purger is started in configurable intervals to search
    1.31 + * for old messages that can be purged.
    1.32 + * @author Christian Lins
    1.33 + */
    1.34 +public class Purger extends Thread
    1.35 +{
    1.36 +  private int interval;
    1.37 +  
    1.38 +  public Purger()
    1.39 +  {
    1.40 +    setDaemon(true); // Daemons run only along with the main thread
    1.41 +    setPriority(Thread.MIN_PRIORITY);
    1.42 +
    1.43 +    this.interval = Config.getInstance().get("n3tpd.article.lifetime", 30) * 24 * 60 * 60 * 1000; // Milliseconds
    1.44 +    if(this.interval < 0)
    1.45 +      this.interval = Integer.MAX_VALUE;
    1.46 +  }
    1.47 +  
    1.48 +  /**
    1.49 +   * Runloop of this Purger class.
    1.50 +   */
    1.51 +  @Override
    1.52 +  public void run()
    1.53 +  {
    1.54 +    for(;;)
    1.55 +    {
    1.56 +      purge();
    1.57 +
    1.58 +      try
    1.59 +      {
    1.60 +        sleep(interval);
    1.61 +      }
    1.62 +      catch(InterruptedException e)
    1.63 +      {
    1.64 +        e.printStackTrace(Debug.getInstance().getStream());
    1.65 +      }
    1.66 +    }
    1.67 +  }
    1.68 +
    1.69 +  /**
    1.70 +   * Loops through all messages and deletes them if their time
    1.71 +   * has come.
    1.72 +   */
    1.73 +  private void purge()
    1.74 +  {
    1.75 +    Debug.getInstance().log("Purging old messages...");
    1.76 +
    1.77 +    try
    1.78 +    {
    1.79 +      for(;;)
    1.80 +      {
    1.81 +        Article art = null; //Database.getInstance().getOldestArticle();
    1.82 +        if(art == null) // No articles in the database
    1.83 +          break;
    1.84 +        
    1.85 +        if(art.getDate().getTime() < (new Date().getTime() + this.interval))
    1.86 +        {
    1.87 +          Database.getInstance().delete(art);
    1.88 +          Debug.getInstance().log("Deleted: " + art);
    1.89 +        }
    1.90 +        else
    1.91 +          break;
    1.92 +      }
    1.93 +    }
    1.94 +    catch(Exception ex)
    1.95 +    {
    1.96 +      ex.printStackTrace();
    1.97 +    }
    1.98 +  }
    1.99 +}