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
26package jdk.internal.logger;
27
28import java.util.function.Function;
29import 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 */
38public 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}
73