/* * 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 Handler publishes log records to System.err. * By default the SimpleFormatter is used to generate brief summaries. *

* Configuration: * By default each ConsoleHandler is initialized using the following * LogManager configuration properties where {@code } * 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. *

*

* For example, the properties for {@code ConsoleHandler} would be: *

*

* For a custom handler, e.g. com.foo.MyHandler, the properties would be: *

*

* @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 ConsoleHandler for System.err. *

* The ConsoleHandler is configured based on * LogManager properties (or their default values). * */ public ConsoleHandler() { sealed = false; configure(); setOutputStream(System.err); sealed = true; } /** * Publish a LogRecord. *

* The logging request was made initially to a Logger object, * which initialized the LogRecord and forwarded it here. *

* @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 StreamHandler.close to do a flush but not * to close the output stream. That is, we do not * close System.err. */ @Override public void close() { flush(); } }