Source Code for Apache Log4j API

Apache Log4j API provides the interface that applications should code to and provides the adapter components required for implementers to create a logging implementation. Apache Log4j API is a required module to use Apache Log4j.

Bytecode (Java 8) for Apache Log4j API is provided in a separate JAR file like log4j-api-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 API 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.util;

import java.lang.reflect.Method;

 * @Since 2.9
public class ProcessIdUtil {

    public static final String DEFAULT_PROCESSID = "-";

    public static String getProcessId() {
        try {
            // LOG4J2-2126 use reflection to improve compatibility with Android Platform which does not support JMX extensions
            final Class<?> managementFactoryClass = Class.forName("");
            final Method getRuntimeMXBean = managementFactoryClass.getDeclaredMethod("getRuntimeMXBean");
            final Class<?> runtimeMXBeanClass = Class.forName("");
            final Method getName = runtimeMXBeanClass.getDeclaredMethod("getName");

            final Object runtimeMXBean = getRuntimeMXBean.invoke(null);
            final String name = (String) getName.invoke(runtimeMXBean);
            //String name = ManagementFactory.getRuntimeMXBean().getName(); //JMX not allowed on Android
            return name.split("@")[0]; // likely works on most platforms
        } catch (final Exception ex) {
            try {
                return new File("/proc/self").getCanonicalFile().getName(); // try a Linux-specific way
            } catch (final IOException ignoredUseDefault) {
                // Ignore exception.
        return DEFAULT_PROCESSID;



Or download all of them as a single archive file:

File name: log4j-api-2.14.1-sources.jar
File size: 264773 bytes
Release date: 2021-03-06


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