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