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Java > Open Source Codes > com > mvnforum > search > post > UpdateThreadTask


1 /*
2  * $Header: /cvsroot/mvnforum/mvnforum/src/com/mvnforum/search/post/UpdateThreadTask.java,v 1.5 2006/04/14 17:05:27 minhnn Exp $
3  * $Author: minhnn $
4  * $Revision: 1.5 $
5  * $Date: 2006/04/14 17:05:27 $
6  *
7  * ====================================================================
8  *
9  * Copyright (C) 2002-2006 by MyVietnam.net
10  *
11  * All copyright notices regarding mvnForum MUST remain
12  * intact in the scripts and in the outputted HTML.
13  * The "powered by" text/logo with a link back to
14  * http://www.mvnForum.com and http://www.MyVietnam.net in
15  * the footer of the pages MUST remain visible when the pages
16  * are viewed on the internet or intranet.
17  *
18  * This program is free software; you can redistribute it and/or modify
19  * it under the terms of the GNU General Public License as published by
20  * the Free Software Foundation; either version 2 of the License, or
21  * any later version.
22  *
23  * This program is distributed in the hope that it will be useful,
24  * but WITHOUT ANY WARRANTY; without even the implied warranty of
25  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
26  * GNU General Public License for more details.
27  *
28  * You should have received a copy of the GNU General Public License
29  * along with this program; if not, write to the Free Software
30  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
31  *
32  * Support can be obtained from support forums at:
33  * http://www.mvnForum.com/mvnforum/index
34  *
35  * Correspondence and Marketing Questions can be sent to:
36  * info at MyVietnam net
37  *
38  * @author: Minh Nguyen
39  */
40 package com.mvnforum.search.post;
41
42 import java.io.IOException JavaDoc;
43 import java.util.*;
44
45 import com.mvnforum.MVNForumConfig;
46 import com.mvnforum.db.DAOFactory;
47 import com.mvnforum.db.PostBean;
48
49 import net.myvietnam.mvncore.exception.SearchException;
50
51 import org.apache.commons.logging.Log;
52 import org.apache.commons.logging.LogFactory;
53 import org.apache.lucene.index.IndexWriter;
54 import org.apache.lucene.store.Directory;
55
56 /**
57  * Update a thread task. This task do indexing of all post in the thread
58  */
59 public class UpdateThreadTask extends TimerTask
60 {
61     private static Log log = LogFactory.getLog(UpdateThreadTask.class);
62
63     private int threadID = 0;
64
65     /*
66      * Contructor with default access, prevent new an instance from outside package
67      */
68     UpdateThreadTask(int threadID) {
69         this.threadID = threadID;
70     }
71
72     /**
73      * Delete all posts in the thread first, then add it again
74      */
75     public void run() {
76         long start = System.currentTimeMillis();
77
78         Collection posts = null;
79         try {
80             //hard code 10000 post to get. is it enough???
81 posts = DAOFactory.getPostDAO().getEnablePosts_inThread_limit(threadID, 0, 10000);
82         } catch (Exception JavaDoc ex) {
83             log.error("UpdateThreadTask.run : cannot get all posts from a thread (" + threadID + ") for indexing", ex);
84         }
85
86         if (posts == null) return;
87
88         // First, delete all posts from the thread
89 try {
90             PostIndexer.deleteThreadFromIndex(threadID);
91         } catch (SearchException e) {
92             log.error("Cannot delete thread from lucene index.", e);
93             // now we should not continue, so we return
94 log.info("UpdateThreadTask failed. Took " + (System.currentTimeMillis() - start) + " ms");
95             return;
96         }
97
98         // then add all posts of the thread
99 Directory directory = null;
100         IndexWriter writer = null;
101         try {
102             directory = MVNForumConfig.getSearchPostIndexDir();
103             writer = PostIndexer.getIndexWriter(directory, false);
104
105             int i = 0;
106             for (Iterator iter = posts.iterator(); iter.hasNext(); ) {
107                 PostBean post = (PostBean) iter.next();
108                 PostIndexer.doIndexPost(post, writer);
109                 i++;
110             }
111             writer.optimize();
112             log.info("Updating thread finished successfully! " + i + " post(s) indexed.");
113         } catch (Exception JavaDoc e) {
114             log.error("Error while updating thread.", e);
115         } finally {
116             if (writer != null) {
117                 try {
118                     writer.close();
119                 } catch (IOException JavaDoc e) {
120                     log.debug("Error closing Lucene IndexWriter", e);
121                 }
122             }
123             if (directory != null) {
124                 try {
125                     directory.close();
126                 } catch (IOException JavaDoc e) {
127                     log.debug("Cannot close directory.", e);
128                 }
129             }
130         }
131         log.info("UpdateThreadTask took " + (System.currentTimeMillis() - start) + " ms");
132     }
133 }
134
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