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 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 {@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 48final 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