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.annotation.Retention;
import java.lang.annotation.RetentionPolicy;

 * Indicates that a particular annotated construct was written with certain performance constraints in mind that
 * should be considered when modifying or testing. Descriptive values should be similar to the conventions used by
 * {@link SuppressWarnings}. For example, code that should not be allocating objects (like iterators) could use the
 * description "allocation".
 * @since 2.6
// Not @Documented: Do not (yet) make this annotation part of the public API of annotated elements.
// No @Target: No restrictions yet on what code elements may be annotated or not.
@Retention(RetentionPolicy.CLASS) // Currently no need to reflectively discover this annotation at runtime.
public @interface PerformanceSensitive {
    /** Description of why this is written the way it is. */
    String[] value() default "";



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


Source Code for Apache Log4j Core Implementation

Downloading Apache Log4j Binary Package

Downloading and Reviewing Apache Log4j Packages

⇑⇑ FAQ for Apache Log4j

2015-11-17, 31033👍, 0💬