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Java > Open Source Codes > org > archive > crawler > util > LogUtils


1 /* LogUtils
2  *
3  * $Id: LogUtils.java,v 1.3.14.1 2007/01/13 01:31:29 stack-sf Exp $
4  *
5  * Created on Jun 8, 2005
6  *
7  * Copyright (C) 2003 Internet Archive.
8  *
9  * This file is part of the Heritrix web crawler (crawler.archive.org).
10  *
11  * Heritrix is free software; you can redistribute it and/or modify
12  * it under the terms of the GNU Lesser Public License as published by
13  * the Free Software Foundation; either version 2.1 of the License, or
14  * any later version.
15  *
16  * Heritrix is distributed in the hope that it will be useful,
17  * but WITHOUT ANY WARRANTY; without even the implied warranty of
18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19  * GNU Lesser Public License for more details.
20  *
21  * You should have received a copy of the GNU Lesser Public License
22  * along with Heritrix; if not, write to the Free Software
23  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
24  *
25  */
26 package org.archive.crawler.util;
27
28 import java.io.File JavaDoc;
29 import java.lang.reflect.Constructor JavaDoc;
30 import java.util.logging.FileHandler JavaDoc;
31 import java.util.logging.Formatter JavaDoc;
32 import java.util.logging.Logger JavaDoc;
33
34 import org.archive.util.PropertyUtils;
35
36 /**
37  * Logging utils.
38  * @author stack
39  */
40 public class LogUtils {
41     /**
42      * Creates a file logger that use heritrix.properties file logger
43      * configuration.
44      * Change the java.util.logging.FileHandler.* properties in
45      * heritrix.properties to change file handler properties.
46      * Use this method if you want a class to log to its own file
47      * rather than use default (console) logger.
48      * @param logsDir Directory in which to write logs.
49      * @param baseName Base name to use for log file (Will have
50      * java.util.logging.FileHandler.pattern or '.log' for suffix).
51      * @param logger Logger whose handler we'll replace with the
52      * file handler created herein.
53      */
54     public static void createFileLogger(File JavaDoc logsDir, String JavaDoc baseName,
55             Logger JavaDoc logger) {
56         int limit =
57             PropertyUtils.getIntProperty("java.util.logging.FileHandler.limit",
58             1024 * 1024 * 1024 * 1024);
59         int count =
60             PropertyUtils.getIntProperty("java.util.logging.FileHandler.count", 1);
61         try {
62             String JavaDoc tmp =
63                 System.getProperty("java.util.logging.FileHandler.pattern");
64                 File JavaDoc logFile = new File JavaDoc(logsDir, baseName +
65                     ((tmp != null && tmp.length() > 0)? tmp: ".log"));
66             FileHandler JavaDoc fh = new FileHandler JavaDoc(logFile.getAbsolutePath(), limit,
67                 count, true);
68             // Manage the formatter to use.
69 tmp = System.getProperty("java.util.logging.FileHandler.formatter");
70             if (tmp != null && tmp.length() > 0) {
71                 Constructor JavaDoc co = Class.forName(tmp).
72                     getConstructor(new Class JavaDoc[] {});
73                 Formatter JavaDoc f = (Formatter JavaDoc) co.newInstance(new Object JavaDoc[] {});
74                 fh.setFormatter(f);
75             }
76             logger.addHandler(fh);
77             logger.setUseParentHandlers(false);
78         } catch (Exception JavaDoc e) {
79             logger.severe("Failed customization of logger: " + e.getMessage());
80         }
81     }
82 }
83
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