1/*
2 * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.  Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26package java.util.logging;
27
28import java.util.Enumeration;
29import java.util.List;
30import java.util.ArrayList;
31
32/**
33 * Logging is the implementation class of LoggingMXBean.
34 *
35 * The <tt>LoggingMXBean</tt> interface provides a standard
36 * method for management access to the individual
37 * {@code Logger} objects available at runtime.
38 *
39 * @author Ron Mann
40 * @author Mandy Chung
41 * @since 1.5
42 *
43 * @see javax.management
44 * @see Logger
45 * @see LogManager
46 */
47class Logging implements LoggingMXBean {
48
49    private static LogManager logManager = LogManager.getLogManager();
50
51    /** Constructor of Logging which is the implementation class
52     *  of LoggingMXBean.
53     */
54    Logging() {
55    }
56
57    public List<String> getLoggerNames() {
58        Enumeration loggers = logManager.getLoggerNames();
59        ArrayList<String> array = new ArrayList<>();
60
61        for (; loggers.hasMoreElements();) {
62            array.add((String) loggers.nextElement());
63        }
64        return array;
65    }
66
67    private static String EMPTY_STRING = "";
68    public String getLoggerLevel(String loggerName) {
69        Logger l = logManager.getLogger(loggerName);
70        if (l == null) {
71            return null;
72        }
73
74        Level level = l.getLevel();
75        if (level == null) {
76            return EMPTY_STRING;
77        } else {
78            return level.getLevelName();
79        }
80    }
81
82    public void setLoggerLevel(String loggerName, String levelName) {
83        if (loggerName == null) {
84            throw new NullPointerException("loggerName is null");
85        }
86
87        Logger logger = logManager.getLogger(loggerName);
88        if (logger == null) {
89            throw new IllegalArgumentException("Logger " + loggerName +
90                "does not exist");
91        }
92
93        Level level = null;
94        if (levelName != null) {
95            // parse will throw IAE if logLevel is invalid
96            level = Level.findLevel(levelName);
97            if (level == null) {
98                throw new IllegalArgumentException("Unknown level \"" + levelName + "\"");
99            }
100        }
101
102        logger.setLevel(level);
103    }
104
105    public String getParentLoggerName( String loggerName ) {
106        Logger l = logManager.getLogger( loggerName );
107        if (l == null) {
108            return null;
109        }
110
111        Logger p = l.getParent();
112        if (p == null) {
113            // root logger
114            return EMPTY_STRING;
115        } else {
116            return p.getName();
117        }
118    }
119}
120