| /* |
| * Copyright (c) 2000, 2013, 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 java.util.logging; |
| |
| /** |
| * This <tt>Handler</tt> publishes log records to <tt>System.err</tt>. |
| * By default the <tt>SimpleFormatter</tt> is used to generate brief summaries. |
| * <p> |
| * <b>Configuration:</b> |
| * By default each <tt>ConsoleHandler</tt> is initialized using the following |
| * <tt>LogManager</tt> configuration properties where {@code <handler-name>} |
| * refers to the fully-qualified class name of the handler. |
| * If properties are not defined |
| * (or have invalid values) then the specified default values are used. |
| * <ul> |
| * <li> <handler-name>.level |
| * specifies the default level for the <tt>Handler</tt> |
| * (defaults to <tt>Level.INFO</tt>). </li> |
| * <li> <handler-name>.filter |
| * specifies the name of a <tt>Filter</tt> class to use |
| * (defaults to no <tt>Filter</tt>). </li> |
| * <li> <handler-name>.formatter |
| * specifies the name of a <tt>Formatter</tt> class to use |
| * (defaults to <tt>java.util.logging.SimpleFormatter</tt>). </li> |
| * <li> <handler-name>.encoding |
| * the name of the character set encoding to use (defaults to |
| * the default platform encoding). </li> |
| * </ul> |
| * <p> |
| * For example, the properties for {@code ConsoleHandler} would be: |
| * <ul> |
| * <li> java.util.logging.ConsoleHandler.level=INFO </li> |
| * <li> java.util.logging.ConsoleHandler.formatter=java.util.logging.SimpleFormatter </li> |
| * </ul> |
| * <p> |
| * For a custom handler, e.g. com.foo.MyHandler, the properties would be: |
| * <ul> |
| * <li> com.foo.MyHandler.level=INFO </li> |
| * <li> com.foo.MyHandler.formatter=java.util.logging.SimpleFormatter </li> |
| * </ul> |
| * <p> |
| * @since 1.4 |
| */ |
| public class ConsoleHandler extends StreamHandler { |
| // Private method to configure a ConsoleHandler from LogManager |
| // properties and/or default values as specified in the class |
| // javadoc. |
| private void configure() { |
| LogManager manager = LogManager.getLogManager(); |
| String cname = getClass().getName(); |
| |
| setLevel(manager.getLevelProperty(cname +".level", Level.INFO)); |
| setFilter(manager.getFilterProperty(cname +".filter", null)); |
| setFormatter(manager.getFormatterProperty(cname +".formatter", new SimpleFormatter())); |
| try { |
| setEncoding(manager.getStringProperty(cname +".encoding", null)); |
| } catch (Exception ex) { |
| try { |
| setEncoding(null); |
| } catch (Exception ex2) { |
| // doing a setEncoding with null should always work. |
| // assert false; |
| } |
| } |
| } |
| |
| /** |
| * Create a <tt>ConsoleHandler</tt> for <tt>System.err</tt>. |
| * <p> |
| * The <tt>ConsoleHandler</tt> is configured based on |
| * <tt>LogManager</tt> properties (or their default values). |
| * |
| */ |
| public ConsoleHandler() { |
| sealed = false; |
| configure(); |
| setOutputStream(System.err); |
| sealed = true; |
| } |
| |
| /** |
| * Publish a <tt>LogRecord</tt>. |
| * <p> |
| * The logging request was made initially to a <tt>Logger</tt> object, |
| * which initialized the <tt>LogRecord</tt> and forwarded it here. |
| * <p> |
| * @param record description of the log event. A null record is |
| * silently ignored and is not published |
| */ |
| @Override |
| public void publish(LogRecord record) { |
| super.publish(record); |
| flush(); |
| } |
| |
| /** |
| * Override <tt>StreamHandler.close</tt> to do a flush but not |
| * to close the output stream. That is, we do <b>not</b> |
| * close <tt>System.err</tt>. |
| */ |
| @Override |
| public void close() { |
| flush(); |
| } |
| } |