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 <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<String> loggers = logManager.getLoggerNames(); 59 ArrayList<String> array = new ArrayList<>(); 60 61 for (; loggers.hasMoreElements();) { 62 array.add(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