SearchRefreshThread.java :  » Wiki-Engine » VeryQuickWiki » vqwiki » Java Open Source

package vqwiki;

import org.apache.log4j.Logger;

/*
Very Quick Wiki - WikiWikiWeb clone
Copyright (C) 2001-2002 Gareth Cronin

This program is free software; you can redistribute it and/or modify
it under the terms of the latest version of the GNU Lesser General
Public License as published by the Free Software Foundation;

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public License
along with this program (gpl.txt); if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
*/

public class SearchRefreshThread extends Thread {

    private static SearchRefreshThread instance = null;
    private boolean refreshNow = false;
    private boolean endThread = false;
    int millis;
    private static final Logger logger = Logger.getLogger(SearchRefreshThread.class);

    /**
     *
     */
    public SearchRefreshThread(int interval) {
        instance = this;
        if (interval <= 0) {
            logger.debug("Inappropriate refresh interval: setting to 10");
            interval = 10;
        }
        this.millis = interval * 60 * 1000;
        start();
    }

    /**
     *
     */
    public void run() {
        while (!endThread) {
            try {
                sleep(this.millis);
            } catch (InterruptedException e) {
                logger.warn(e);
            }
            try {
                WikiBase.getInstance().getSearchEngineInstance().refreshIndex();
                refreshNow = false;
            } catch (java.io.IOException err) {
                logger.error(err);
            } catch (Exception err) {
                err.printStackTrace();
                logger.error(err);
            }
        }
    }

    /**
     *
     */
    private static SearchRefreshThread getInstance() {
        return instance;
    }

    /**
     *
     */
    public static void refreshNow() {
        if (getInstance() == null) return;
        getInstance().refreshNow = true;
        getInstance().interrupt();
    }

    /**
     *
     */
    public static void endThread() {
        if (getInstance() == null) return;
        getInstance().endThread = true;
        getInstance().interrupt();
    }
}