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The source code/* * $Header: /cvsroot/mvnforum/mvnforum/src/com/mvnforum/search/post/RebuildPostIndexTask.java,v 1.5 2005/01/18 11:52:23 minhnn Exp $ * $Author: minhnn $ * $Revision: 1.5 $ * $Date: 2005/01/18 11:52:23 $ * * ==================================================================== * * Copyright (C) 2002-2005 by MyVietnam.net * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * as published by the Free Software Foundation; either version 2 * of the License, or any later version. * * All copyright notices regarding mvnForum MUST remain intact * in the scripts and in the outputted HTML. * The "powered by" text/logo with a link back to * http://www.mvnForum.com and http://www.MyVietnam.net in the * footer of the pages MUST remain visible when the pages * are viewed on the internet or intranet. * * 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 General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. * * Support can be obtained from support forums at: * http://www.mvnForum.com/mvnforum/index * * Correspondence and Marketing Questions can be sent to: * info@MyVietnam.net * * @author: Minh Nguyen minhnn@MyVietnam.net * @author: Dejan Krsmanovic dejan_krsmanovic@yahoo.com */ package com.mvnforum.search.post; import java.io.IOException; import java.util.*; import com.mvnforum.db.DAOFactory; import com.mvnforum.db.PostBean; import net.myvietnam.mvncore.exception.DatabaseException; import org.apache.commons.logging.Log; import org.apache.commons.logging.LogFactory; import org.apache.lucene.index.IndexWriter; /** * Rebuilding indices task. This task do indexing of all documents */ public class RebuildPostIndexTask extends TimerTask { private static Log log = LogFactory.getLog(RebuildPostIndexTask.class); public static final int POST_PER_GROUPS = 500; public static final int MERGE_FACTOR = 20; private int maxPostID = 0; private static boolean isRebuilding = false; public static boolean isRebuilding() { return isRebuilding; } /* * Contructor with default access, prevent new an instance from outside package */ RebuildPostIndexTask(int maxPostID) { this.maxPostID = maxPostID; } /** * Create new index. If anything exist already - delete it */ public void run() { isRebuilding = true; long start = System.currentTimeMillis(); IndexWriter writer = null; try { writer = PostIndexer.getIndexWriter(true); writer.mergeFactor = MERGE_FACTOR; // note that the postTotal is get at the begining of the method // so that it will index only these posts. Later while indexing, // if new posts are added, then other task will take care it int postTotal = DAOFactory.getPostDAO().getNumberOfPosts(); int index = 0; int offset = 0; while (index < postTotal) { // Please note that is method sorted by PostCreationDate ASC Collection posts = DAOFactory.getPostDAO().getLimitPosts(offset, POST_PER_GROUPS); for (Iterator iter = posts.iterator(); iter.hasNext(); ) { PostBean post = (PostBean) iter.next(); PostIndexer.doIndexPost(post, writer); index++; } offset = index; } //end while writer.optimize(); log.info("Rebuilt index finished successfully! " + index + " post(s) indexed."); } catch (DatabaseException ex) { log.error("RebuildIndexTask.run : cannot get posts from database for indexing", ex); } catch (Exception e) { log.error("Error while rebuilding index", e); } finally { try { if (writer != null) { writer.close(); } } catch (IOException ignore) { } } log.info("RebuildIndexTask took " + (System.currentTimeMillis() - start) + " ms"); isRebuilding = false; } } |
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