trunk/com/so/news/storage/Purger.java
author chris <chris@marvin>
Tue Jan 20 10:21:03 2009 +0100 (2009-01-20)
changeset 0 f907866f0e4b
permissions -rw-r--r--
Initial import.
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/*
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 *   StarOffice News Server
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 *   see AUTHORS for the list of contributors
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 *
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 *   This program is free software: you can redistribute it and/or modify
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 *   it under the terms of the GNU General Public License as published by
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 *   the Free Software Foundation, either version 3 of the License, or
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 *   (at your option) any later version.
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 *
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 *   This program is distributed in the hope that it will be useful,
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 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
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 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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 *   GNU General Public License for more details.
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 *
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 *   You should have received a copy of the GNU General Public License
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 *   along with this program.  If not, see <http://www.gnu.org/licenses/>.
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 */
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package com.so.news.storage;
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import java.util.Date;
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import com.so.news.Config;
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import com.so.news.Debug;
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/**
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 * The purger is started in configurable intervals to search
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 * for old messages that can be purged.
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 * @author Christian Lins
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 */
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public class Purger extends Thread
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{
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  private int interval;
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  public Purger()
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  {
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    setDaemon(true); // Daemons run only along with the main thread
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    setPriority(Thread.MIN_PRIORITY);
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    this.interval = Config.getInstance().get("n3tpd.article.lifetime", 30) * 24 * 60 * 60 * 1000; // Milliseconds
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    if(this.interval < 0)
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      this.interval = Integer.MAX_VALUE;
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  }
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  /**
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   * Runloop of this Purger class.
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   */
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  @Override
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  public void run()
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  {
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    for(;;)
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    {
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      purge();
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      try
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      {
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        sleep(interval);
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      }
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      catch(InterruptedException e)
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      {
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        e.printStackTrace(Debug.getInstance().getStream());
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      }
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    }
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  }
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  /**
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   * Loops through all messages and deletes them if their time
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   * has come.
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   */
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  private void purge()
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  {
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    Debug.getInstance().log("Purging old messages...");
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    try
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    {
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      for(;;)
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      {
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        Article art = null; //Database.getInstance().getOldestArticle();
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        if(art == null) // No articles in the database
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          break;
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        if(art.getDate().getTime() < (new Date().getTime() + this.interval))
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        {
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          Database.getInstance().delete(art);
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          Debug.getInstance().log("Deleted: " + art);
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        }
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        else
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          break;
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      }
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    }
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    catch(Exception ex)
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    {
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      ex.printStackTrace();
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    }
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  }
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}