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/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package examples;
import org.apache.log4j.*;
import org.apache.log4j.helpers.PatternParser;
/**
Example showing how to extend PatternLayout to recognize additional
conversion characters.
<p>In this case MyPatternLayout recognizes %# conversion pattern. It
outputs the value of an internal counter which is also incremented
at each call.
<p>See <a href=doc-files/MyPatternLayout.java><b>source</b></a> code
for more details.
@see MyPatternParser
@see org.apache.log4j.PatternLayout
@author Anders Kristensen
*/
public class MyPatternLayout extends PatternLayout {
public
MyPatternLayout() {
this(DEFAULT_CONVERSION_PATTERN);
}
public
MyPatternLayout(String pattern) {
super(pattern);
}
public
PatternParser createPatternParser(String pattern) {
return new MyPatternParser(
pattern == null ? DEFAULT_CONVERSION_PATTERN : pattern);
}
public
static void main(String[] args) {
Layout layout = new MyPatternLayout("[counter=%.10#] - %m%n");
Logger logger = Logger.getLogger("some.cat");
logger.addAppender(new ConsoleAppender(layout, ConsoleAppender.SYSTEM_OUT));
logger.debug("Hello, log");
logger.info("Hello again...");
}
}
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