Showing the changes to java/pkg/sun/util/logging/LoggingSupport.java (1 of 18352 files). Show all
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| 1 | +/* | |
| 2 | + * Copyright (c) 2009, 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 | + | |
| 27 | +package sun.util.logging; | |
| 28 | + | |
| 29 | +import java.lang.reflect.Field; | |
| 30 | +import java.security.AccessController; | |
| 31 | +import java.security.PrivilegedAction; | |
| 32 | +import java.util.Date; | |
| 33 | + | |
| 34 | +/** | |
| 35 | + * Internal API to support JRE implementation to detect if the java.util.logging | |
| 36 | + * support is available but with no dependency on the java.util.logging | |
| 37 | + * classes. This LoggingSupport class provides several static methods to | |
| 38 | + * access the java.util.logging functionality that requires the caller | |
| 39 | + * to ensure that the logging support is {@linkplain #isAvailable available} | |
| 40 | + * before invoking it. | |
| 41 | + * | |
| 42 | + * @see sun.util.logging.PlatformLogger if you want to log messages even | |
| 43 | + * if the logging support is not available | |
| 44 | + */ | |
| 45 | +public class LoggingSupport { | |
| 46 | + private LoggingSupport() { } | |
| 47 | + | |
| 48 | + private static final LoggingProxy proxy = | |
| 49 | + AccessController.doPrivileged(new PrivilegedAction<LoggingProxy>() { | |
| 50 | + public LoggingProxy run() { | |
| 51 | + try { | |
| 52 | + // create a LoggingProxyImpl instance when | |
| 53 | + // java.util.logging classes exist | |
| 54 | + Class<?> c = Class.forName("java.util.logging.LoggingProxyImpl", true, null); | |
| 55 | + Field f = c.getDeclaredField("INSTANCE"); | |
| 56 | + f.setAccessible(true); | |
| 57 | + return (LoggingProxy) f.get(null); | |
| 58 | + } catch (ClassNotFoundException cnf) { | |
| 59 | + return null; | |
| 60 | + } catch (NoSuchFieldException e) { | |
| 61 | + throw new AssertionError(e); | |
| 62 | + } catch (IllegalAccessException e) { | |
| 63 | + throw new AssertionError(e); | |
| 64 | + } | |
| 65 | + }}); | |
| 66 | + | |
| 67 | + /** | |
| 68 | + * Returns true if java.util.logging support is available. | |
| 69 | + */ | |
| 70 | + public static boolean isAvailable() { | |
| 71 | + return proxy != null; | |
| 72 | + } | |
| 73 | + | |
| 74 | + private static void ensureAvailable() { | |
| 75 | + if (proxy == null) | |
| 76 | + throw new AssertionError("Should not here"); | |
| 77 | + } | |
| 78 | + | |
| 79 | + public static java.util.List<String> getLoggerNames() { | |
| 80 | + ensureAvailable(); | |
| 81 | + return proxy.getLoggerNames(); | |
| 82 | + } | |
| 83 | + public static String getLoggerLevel(String loggerName) { | |
| 84 | + ensureAvailable(); | |
| 85 | + return proxy.getLoggerLevel(loggerName); | |
| 86 | + } | |
| 87 | + | |
| 88 | + public static void setLoggerLevel(String loggerName, String levelName) { | |
| 89 | + ensureAvailable(); | |
| 90 | + proxy.setLoggerLevel(loggerName, levelName); | |
| 91 | + } | |
| 92 | + | |
| 93 | + public static String getParentLoggerName(String loggerName) { | |
| 94 | + ensureAvailable(); | |
| 95 | + return proxy.getParentLoggerName(loggerName); | |
| 96 | + } | |
| 97 | + | |
| 98 | + public static Object getLogger(String name) { | |
| 99 | + ensureAvailable(); | |
| 100 | + return proxy.getLogger(name); | |
| 101 | + } | |
| 102 | + | |
| 103 | + public static Object getLevel(Object logger) { | |
| 104 | + ensureAvailable(); | |
| 105 | + return proxy.getLevel(logger); | |
| 106 | + } | |
| 107 | + | |
| 108 | + public static void setLevel(Object logger, Object newLevel) { | |
| 109 | + ensureAvailable(); | |
| 110 | + proxy.setLevel(logger, newLevel); | |
| 111 | + } | |
| 112 | + | |
| 113 | + public static boolean isLoggable(Object logger, Object level) { | |
| 114 | + ensureAvailable(); | |
| 115 | + return proxy.isLoggable(logger,level); | |
| 116 | + } | |
| 117 | + | |
| 118 | + public static void log(Object logger, Object level, String msg) { | |
| 119 | + ensureAvailable(); | |
| 120 | + proxy.log(logger, level, msg); | |
| 121 | + } | |
| 122 | + | |
| 123 | + public static void log(Object logger, Object level, String msg, Throwable t) { | |
| 124 | + ensureAvailable(); | |
| 125 | + proxy.log(logger, level, msg, t); | |
| 126 | + } | |
| 127 | + | |
| 128 | + public static void log(Object logger, Object level, String msg, Object... params) { | |
| 129 | + ensureAvailable(); | |
| 130 | + proxy.log(logger, level, msg, params); | |
| 131 | + } | |
| 132 | + | |
| 133 | + public static Object parseLevel(String levelName) { | |
| 134 | + ensureAvailable(); | |
| 135 | + return proxy.parseLevel(levelName); | |
| 136 | + } | |
| 137 | + | |
| 138 | + public static String getLevelName(Object level) { | |
| 139 | + ensureAvailable(); | |
| 140 | + return proxy.getLevelName(level); | |
| 141 | + } | |
| 142 | + | |
| 143 | + private static final String DEFAULT_FORMAT = | |
| 144 | + "%1$tb %1$td, %1$tY %1$tl:%1$tM:%1$tS %1$Tp %2$s%n%4$s: %5$s%6$s%n"; | |
| 145 | + | |
| 146 | + private static final String FORMAT_PROP_KEY = "java.util.logging.SimpleFormatter.format"; | |
| 147 | + public static String getSimpleFormat() { | |
| 148 | + return getSimpleFormat(true); | |
| 149 | + } | |
| 150 | + | |
| 151 | + // useProxy if true will cause initialization of | |
| 152 | + // java.util.logging and read its configuration | |
| 153 | + static String getSimpleFormat(boolean useProxy) { | |
| 154 | + String format = | |
| 155 | + AccessController.doPrivileged( | |
| 156 | + new PrivilegedAction<String>() { | |
| 157 | + public String run() { | |
| 158 | + return System.getProperty(FORMAT_PROP_KEY); | |
| 159 | + } | |
| 160 | + }); | |
| 161 | + | |
| 162 | + if (useProxy && proxy != null && format == null) { | |
| 163 | + format = proxy.getProperty(FORMAT_PROP_KEY); | |
| 164 | + } | |
| 165 | + | |
| 166 | + if (format != null) { | |
| 167 | + try { | |
| 168 | + // validate the user-defined format string | |
| 169 | + String.format(format, new Date(), "", "", "", "", ""); | |
| 170 | + } catch (IllegalArgumentException e) { | |
| 171 | + // illegal syntax; fall back to the default format | |
| 172 | + format = DEFAULT_FORMAT; | |
| 173 | + } | |
| 174 | + } else { | |
| 175 | + format = DEFAULT_FORMAT; | |
| 176 | + } | |
| 177 | + return format; | |
| 178 | + } | |
| 179 | + | |
| 180 | +} | |