| /* |
| * Copyright (c) 2009, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| |
| package sun.util.logging; |
| |
| import java.lang.reflect.Field; |
| import java.security.AccessController; |
| import java.security.PrivilegedAction; |
| import java.util.Date; |
| |
| /** |
| * Internal API to support JRE implementation to detect if the java.util.logging |
| * support is available but with no dependency on the java.util.logging |
| * classes. This LoggingSupport class provides several static methods to |
| * access the java.util.logging functionality that requires the caller |
| * to ensure that the logging support is {@linkplain #isAvailable available} |
| * before invoking it. |
| * |
| * @see sun.util.logging.PlatformLogger if you want to log messages even |
| * if the logging support is not available |
| */ |
| public class LoggingSupport { |
| private LoggingSupport() { } |
| |
| private static final LoggingProxy proxy = |
| AccessController.doPrivileged(new PrivilegedAction<LoggingProxy>() { |
| public LoggingProxy run() { |
| try { |
| // create a LoggingProxyImpl instance when |
| // java.util.logging classes exist |
| Class<?> c = Class.forName("java.util.logging.LoggingProxyImpl", true, null); |
| Field f = c.getDeclaredField("INSTANCE"); |
| f.setAccessible(true); |
| return (LoggingProxy) f.get(null); |
| } catch (ClassNotFoundException cnf) { |
| return null; |
| } catch (NoSuchFieldException e) { |
| throw new AssertionError(e); |
| } catch (IllegalAccessException e) { |
| throw new AssertionError(e); |
| } |
| }}); |
| |
| /** |
| * Returns true if java.util.logging support is available. |
| */ |
| public static boolean isAvailable() { |
| return proxy != null; |
| } |
| |
| private static void ensureAvailable() { |
| if (proxy == null) |
| throw new AssertionError("Should not here"); |
| } |
| |
| public static java.util.List<String> getLoggerNames() { |
| ensureAvailable(); |
| return proxy.getLoggerNames(); |
| } |
| public static String getLoggerLevel(String loggerName) { |
| ensureAvailable(); |
| return proxy.getLoggerLevel(loggerName); |
| } |
| |
| public static void setLoggerLevel(String loggerName, String levelName) { |
| ensureAvailable(); |
| proxy.setLoggerLevel(loggerName, levelName); |
| } |
| |
| public static String getParentLoggerName(String loggerName) { |
| ensureAvailable(); |
| return proxy.getParentLoggerName(loggerName); |
| } |
| |
| public static Object getLogger(String name) { |
| ensureAvailable(); |
| return proxy.getLogger(name); |
| } |
| |
| public static Object getLevel(Object logger) { |
| ensureAvailable(); |
| return proxy.getLevel(logger); |
| } |
| |
| public static void setLevel(Object logger, Object newLevel) { |
| ensureAvailable(); |
| proxy.setLevel(logger, newLevel); |
| } |
| |
| public static boolean isLoggable(Object logger, Object level) { |
| ensureAvailable(); |
| return proxy.isLoggable(logger,level); |
| } |
| |
| public static void log(Object logger, Object level, String msg) { |
| ensureAvailable(); |
| proxy.log(logger, level, msg); |
| } |
| |
| public static void log(Object logger, Object level, String msg, Throwable t) { |
| ensureAvailable(); |
| proxy.log(logger, level, msg, t); |
| } |
| |
| public static void log(Object logger, Object level, String msg, Object... params) { |
| ensureAvailable(); |
| proxy.log(logger, level, msg, params); |
| } |
| |
| public static Object parseLevel(String levelName) { |
| ensureAvailable(); |
| return proxy.parseLevel(levelName); |
| } |
| |
| public static String getLevelName(Object level) { |
| ensureAvailable(); |
| return proxy.getLevelName(level); |
| } |
| |
| public static int getLevelValue(Object level) { |
| ensureAvailable(); |
| return proxy.getLevelValue(level); |
| } |
| |
| private static final String DEFAULT_FORMAT = |
| "%1$tb %1$td, %1$tY %1$tl:%1$tM:%1$tS %1$Tp %2$s%n%4$s: %5$s%6$s%n"; |
| |
| private static final String FORMAT_PROP_KEY = "java.util.logging.SimpleFormatter.format"; |
| public static String getSimpleFormat() { |
| return getSimpleFormat(true); |
| } |
| |
| // useProxy if true will cause initialization of |
| // java.util.logging and read its configuration |
| static String getSimpleFormat(boolean useProxy) { |
| String format = |
| AccessController.doPrivileged( |
| new PrivilegedAction<String>() { |
| public String run() { |
| return System.getProperty(FORMAT_PROP_KEY); |
| } |
| }); |
| |
| if (useProxy && proxy != null && format == null) { |
| format = proxy.getProperty(FORMAT_PROP_KEY); |
| } |
| |
| if (format != null) { |
| try { |
| // validate the user-defined format string |
| String.format(format, new Date(), "", "", "", "", ""); |
| } catch (IllegalArgumentException e) { |
| // illegal syntax; fall back to the default format |
| format = DEFAULT_FORMAT; |
| } |
| } else { |
| format = DEFAULT_FORMAT; |
| } |
| return format; |
| } |
| |
| } |