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 | } | ||