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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