Source Code Cross Referenced for LogUtils.java in  » Web-Crawler » heritrix » org » archive » crawler » util » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Web Crawler » heritrix » org.archive.crawler.util 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


01:        /* LogUtils
02:         * 
03:         * $Id: LogUtils.java 4647 2006-09-22 18:39:39Z paul_jack $
04:         *
05:         * Created on Jun 8, 2005
06:         * 
07:         * Copyright (C) 2003 Internet Archive.
08:         *
09:         * 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;
29:        import java.lang.reflect.Constructor;
30:        import java.util.logging.FileHandler;
31:        import java.util.logging.Formatter;
32:        import java.util.logging.Logger;
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 logsDir, String baseName,
55:                    Logger logger) {
56:                int limit = PropertyUtils.getIntProperty(
57:                        "java.util.logging.FileHandler.limit",
58:                        1024 * 1024 * 1024 * 1024);
59:                int count = PropertyUtils.getIntProperty(
60:                        "java.util.logging.FileHandler.count", 1);
61:                try {
62:                    String tmp = System
63:                            .getProperty("java.util.logging.FileHandler.pattern");
64:                    File logFile = new File(logsDir,
65:                            baseName
66:                                    + ((tmp != null && tmp.length() > 0) ? tmp
67:                                            : ".log"));
68:                    FileHandler fh = new FileHandler(logFile.getAbsolutePath(),
69:                            limit, count, true);
70:                    // Manage the formatter to use.
71:                    tmp = System
72:                            .getProperty("java.util.logging.FileHandler.formatter");
73:                    if (tmp != null && tmp.length() > 0) {
74:                        Constructor co = Class.forName(tmp).getConstructor(
75:                                new Class[] {});
76:                        Formatter f = (Formatter) co
77:                                .newInstance(new Object[] {});
78:                        fh.setFormatter(f);
79:                    }
80:                    logger.addHandler(fh);
81:                    logger.setUseParentHandlers(false);
82:                } catch (Exception e) {
83:                    logger.severe("Failed customization of logger: "
84:                            + e.getMessage());
85:                }
86:            }
87:        }
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