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.jmx;

import java.util.Objects;


import org.apache.logging.log4j.core.Appender;
import org.apache.logging.log4j.core.filter.AbstractFilterable;

 * Implementation of the {@code AppenderAdminMBean} interface.
public class AppenderAdmin implements AppenderAdminMBean {

    private final String contextName;
    private final Appender appender;
    private final ObjectName objectName;

     * Constructs a new {@code AppenderAdmin} with the specified contextName
     * and appender.
     * @param contextName used in the {@code ObjectName} for this mbean
     * @param appender the instrumented object
    public AppenderAdmin(final String contextName, final Appender appender) {
        // super(executor); // no notifications for now
        this.contextName = Objects.requireNonNull(contextName, "contextName");
        this.appender = Objects.requireNonNull(appender, "appender");
        try {
            final String ctxName = Server.escape(this.contextName);
            final String configName = Server.escape(appender.getName());
            final String name = String.format(PATTERN, ctxName, configName);
            objectName = new ObjectName(name);
        } catch (final Exception e) {
            throw new IllegalStateException(e);

     * Returns the {@code ObjectName} of this mbean.
     * @return the {@code ObjectName}
     * @see AppenderAdminMBean#PATTERN
    public ObjectName getObjectName() {
        return objectName;

    public String getName() {
        return appender.getName();

    public String getLayout() {
        return String.valueOf(appender.getLayout());

    public boolean isIgnoreExceptions() {
        return appender.ignoreExceptions();

    public String getErrorHandler() {
        return String.valueOf(appender.getHandler());

    public String getFilter() {
        if (appender instanceof AbstractFilterable) {
            return String.valueOf(((AbstractFilterable) appender).getFilter());
        return null;



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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