Showing the changes to java/pkg/java/util/logging/ConsoleHandler.java (1 of 18352 files). Show all
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| 1 | +/* | |
| 2 | + * Copyright (c) 2000, 2003, 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 java.util.logging; | |
| 28 | + | |
| 29 | +import java.io.*; | |
| 30 | +import java.net.*; | |
| 31 | + | |
| 32 | +/** | |
| 33 | + * This <tt>Handler</tt> publishes log records to <tt>System.err</tt>. | |
| 34 | + * By default the <tt>SimpleFormatter</tt> is used to generate brief summaries. | |
| 35 | + * <p> | |
| 36 | + * <b>Configuration:</b> | |
| 37 | + * By default each <tt>ConsoleHandler</tt> is initialized using the following | |
| 38 | + * <tt>LogManager</tt> configuration properties. If properties are not defined | |
| 39 | + * (or have invalid values) then the specified default values are used. | |
| 40 | + * <ul> | |
| 41 | + * <li> java.util.logging.ConsoleHandler.level | |
| 42 | + * specifies the default level for the <tt>Handler</tt> | |
| 43 | + * (defaults to <tt>Level.INFO</tt>). | |
| 44 | + * <li> java.util.logging.ConsoleHandler.filter | |
| 45 | + * specifies the name of a <tt>Filter</tt> class to use | |
| 46 | + * (defaults to no <tt>Filter</tt>). | |
| 47 | + * <li> java.util.logging.ConsoleHandler.formatter | |
| 48 | + * specifies the name of a <tt>Formatter</tt> class to use | |
| 49 | + * (defaults to <tt>java.util.logging.SimpleFormatter</tt>). | |
| 50 | + * <li> java.util.logging.ConsoleHandler.encoding | |
| 51 | + * the name of the character set encoding to use (defaults to | |
| 52 | + * the default platform encoding). | |
| 53 | + * </ul> | |
| 54 | + * <p> | |
| 55 | + * @since 1.4 | |
| 56 | + */ | |
| 57 | + | |
| 58 | +public class ConsoleHandler extends StreamHandler { | |
| 59 | + // Private method to configure a ConsoleHandler from LogManager | |
| 60 | + // properties and/or default values as specified in the class | |
| 61 | + // javadoc. | |
| 62 | + private void configure() { | |
| 63 | + LogManager manager = LogManager.getLogManager(); | |
| 64 | + String cname = getClass().getName(); | |
| 65 | + | |
| 66 | + setLevel(manager.getLevelProperty(cname +".level", Level.INFO)); | |
| 67 | + setFilter(manager.getFilterProperty(cname +".filter", null)); | |
| 68 | + setFormatter(manager.getFormatterProperty(cname +".formatter", new SimpleFormatter())); | |
| 69 | + try { | |
| 70 | + setEncoding(manager.getStringProperty(cname +".encoding", null)); | |
| 71 | + } catch (Exception ex) { | |
| 72 | + try { | |
| 73 | + setEncoding(null); | |
| 74 | + } catch (Exception ex2) { | |
| 75 | + // doing a setEncoding with null should always work. | |
| 76 | + // assert false; | |
| 77 | + } | |
| 78 | + } | |
| 79 | + } | |
| 80 | + | |
| 81 | + /** | |
| 82 | + * Create a <tt>ConsoleHandler</tt> for <tt>System.err</tt>. | |
| 83 | + * <p> | |
| 84 | + * The <tt>ConsoleHandler</tt> is configured based on | |
| 85 | + * <tt>LogManager</tt> properties (or their default values). | |
| 86 | + * | |
| 87 | + */ | |
| 88 | + public ConsoleHandler() { | |
| 89 | + sealed = false; | |
| 90 | + configure(); | |
| 91 | + setOutputStream(System.err); | |
| 92 | + sealed = true; | |
| 93 | + } | |
| 94 | + | |
| 95 | + /** | |
| 96 | + * Publish a <tt>LogRecord</tt>. | |
| 97 | + * <p> | |
| 98 | + * The logging request was made initially to a <tt>Logger</tt> object, | |
| 99 | + * which initialized the <tt>LogRecord</tt> and forwarded it here. | |
| 100 | + * <p> | |
| 101 | + * @param record description of the log event. A null record is | |
| 102 | + * silently ignored and is not published | |
| 103 | + */ | |
| 104 | + public void publish(LogRecord record) { | |
| 105 | + super.publish(record); | |
| 106 | + flush(); | |
| 107 | + } | |
| 108 | + | |
| 109 | + /** | |
| 110 | + * Override <tt>StreamHandler.close</tt> to do a flush but not | |
| 111 | + * to close the output stream. That is, we do <b>not</b> | |
| 112 | + * close <tt>System.err</tt>. | |
| 113 | + */ | |
| 114 | + public void close() { | |
| 115 | + flush(); | |
| 116 | + } | |
| 117 | +} | |