/*
* Copyright (c) 2000, 2003, 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;
import java.io.*;
import java.net.*;
/**
* 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. If properties are not defined
* (or have invalid values) then the specified default values are used.
* <ul>
* <li> java.util.logging.ConsoleHandler.level
* specifies the default level for the <tt>Handler</tt>
* (defaults to <tt>Level.INFO</tt>).
* <li> java.util.logging.ConsoleHandler.filter
* specifies the name of a <tt>Filter</tt> class to use
* (defaults to no <tt>Filter</tt>).
* <li> java.util.logging.ConsoleHandler.formatter
* specifies the name of a <tt>Formatter</tt> class to use
* (defaults to <tt>java.util.logging.SimpleFormatter</tt>).
* <li> java.util.logging.ConsoleHandler.encoding
* the name of the character set encoding to use (defaults to
* the default platform encoding).
* </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
*/
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>.
*/
public void close() {
flush();
}
}