1 /* 2 * Copyright (c) 2016, 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 package jdk.internal.logger; 27 28 import java.util.function.Function; 29 import sun.util.logging.PlatformLogger; 30 31 /** 32 * A simple console logger used to emulate the behavior of JUL loggers when 33 * java.util.logging has no custom configuration. 34 * Surrogate loggers are usually only used temporarily, until the LogManager 35 * is initialized. At this point, the surrogates are replaced by an actual 36 * logger obtained from LogManager. 37 */ 38 public final class SurrogateLogger extends SimpleConsoleLogger { 39 40 private static final PlatformLogger.Level JUL_DEFAULT_LEVEL = 41 PlatformLogger.Level.INFO; 42 private static volatile String simpleFormatString; 43 44 SurrogateLogger(String name) { 45 super(name, true); 46 } 47 48 @Override 49 PlatformLogger.Level defaultPlatformLevel() { 50 return JUL_DEFAULT_LEVEL; 51 } 52 53 @Override 54 String getSimpleFormatString() { 55 if (simpleFormatString == null) { 56 simpleFormatString = getSimpleFormat(null); 57 } 58 return simpleFormatString; 59 } 60 61 public static String getSimpleFormat(Function<String, String> defaultPropertyGetter) { 62 return Formatting.getSimpleFormat(Formatting.JUL_FORMAT_PROP_KEY, defaultPropertyGetter); 63 } 64 65 public static SurrogateLogger makeSurrogateLogger(String name) { 66 return new SurrogateLogger(name); 67 } 68 69 public static boolean isFilteredFrame(StackWalker.StackFrame st) { 70 return Formatting.isFilteredFrame(st); 71 } 72 }