1 /*
2 * Copyright (c) 2003, 2013, 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
26 package java.util.logging;
27
28 import java.util.Enumeration;
29 import java.util.List;
30 import java.util.ArrayList;
31
32 /**
33 * Logging is the implementation class of LoggingMXBean.
34 *
35 * The {@code LoggingMXBean} 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 */
47 @SuppressWarnings("deprecation") // implements LoggingMXBean
48 final class Logging implements LoggingMXBean {
49
50 private static LogManager logManager = LogManager.getLogManager();
51
52 /** Constructor of Logging which is the implementation class
53 * of LoggingMXBean.
54 */
55 private Logging() {
56 }
57
58 @Override
59 public List<String> getLoggerNames() {
60 Enumeration<String> loggers = logManager.getLoggerNames();
61 ArrayList<String> array = new ArrayList<>();
62
63 for (; loggers.hasMoreElements();) {
64 array.add(loggers.nextElement());
65 }
66 return array;
67 }
68
69 private static String EMPTY_STRING = "";
70 @Override
71 public String getLoggerLevel(String loggerName) {
72 Logger l = logManager.getLogger(loggerName);
73 if (l == null) {
74 return null;
75 }
76
77 Level level = l.getLevel();
78 if (level == null) {
79 return EMPTY_STRING;
80 } else {
81 return level.getLevelName();
82 }
83 }
84
85 @Override
86 public void setLoggerLevel(String loggerName, String levelName) {
87 if (loggerName == null) {
88 throw new NullPointerException("loggerName is null");
89 }
90
91 Logger logger = logManager.getLogger(loggerName);
92 if (logger == null) {
93 throw new IllegalArgumentException("Logger " + loggerName +
94 " does not exist");
95 }
96
97 Level level = null;
98 if (levelName != null) {
99 // parse will throw IAE if logLevel is invalid
100 level = Level.findLevel(levelName);
101 if (level == null) {
102 throw new IllegalArgumentException("Unknown level \"" + levelName + "\"");
103 }
104 }
105
106 logger.setLevel(level);
107 }
108
109 @Override
110 public String getParentLoggerName( String loggerName ) {
111 Logger l = logManager.getLogger( loggerName );
112 if (l == null) {
113 return null;
114 }
115
116 Logger p = l.getParent();
117 if (p == null) {
118 // root logger
119 return EMPTY_STRING;
120 } else {
121 return p.getName();
122 }
123 }
124
125 static Logging getInstance() {
126 return INSTANCE;
127 }
128
129 private static final Logging INSTANCE = new Logging();
130
131 }
132