Source Code for Apache Log4j Core Implementation

Apache Log4j Core Implementation provides the functional components of the logging system. Users are free to create their own plugins and include them in the logging configuration. Apache Log4j Core is a required module to use Apache Log4j.

Bytecode (Java 8) for Apache Log4j Core Implementation is provided in a separate JAR file like log4j-core-2.14.1.jar.

Source Code files for Apache Log4j API are provided in both binary packge like and source package like You can download them at Apache Log4j Website.

You can also browse Source Code files for Apache Log4j Core Implementation 2.14.1 below.



 * 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
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * See the license for the specific language governing permissions and
 * limitations under the license.
package org.apache.logging.log4j.core.pattern;

import org.apache.logging.log4j.util.PerformanceSensitive;

 * Abstract base class for other pattern converters which can return only parts of their name.
public abstract class NamePatternConverter extends LogEventPatternConverter {
     * Abbreviator.
    private final NameAbbreviator abbreviator;

     * Constructor.
     * @param name    name of converter.
     * @param style   style name for associated output.
     * @param options options, may be null, first element will be interpreted as an abbreviation pattern.
    protected NamePatternConverter(final String name, final String style, final String[] options) {
        super(name, style);

        if (options != null && options.length > 0) {
            abbreviator = NameAbbreviator.getAbbreviator(options[0]);
        } else {
            abbreviator = NameAbbreviator.getDefaultAbbreviator();

     * Abbreviate name in string buffer.
     * @param original string containing name.
     * @param destination the StringBuilder to write to
     * @return The abbreviated name.
    protected final void abbreviate(final String original, final StringBuilder destination) {
        abbreviator.abbreviate(original, destination);



Or download all of them as a single archive file:

File name: log4j-core-2.14.1-sources.jar
File size: 1281358 bytes
Release date: 2021-03-06


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