Source Code for Apache Log4j 1.2 Bridge

Apache Log4j 1.2 Bridge allows applications coded to use Log4j 1.2 API to use Log4j 2 instead.

Bytecode (Java 8) for Apache Log4j 1.2 Bridge is provided in a separate JAR file like log4j-1.2-api-2.14.1.jar.

Source Code files for Apache Log4j 1.2 Bridge 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 1.2 Bridge 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.log4j.bridge;

import org.apache.log4j.Layout;
import org.apache.logging.log4j.core.LogEvent;
import org.apache.logging.log4j.core.layout.ByteBufferDestination;

import java.util.HashMap;
import java.util.Map;

 * Class Description goes here.
public class LayoutAdapter implements org.apache.logging.log4j.core.Layout<String> {
    private Layout layout;

    public LayoutAdapter(Layout layout) {
        this.layout = layout;

    public byte[] getFooter() {
        return layout.getFooter() == null ? null : layout.getFooter().getBytes();

    public byte[] getHeader() {
        return layout.getHeader() == null ? null : layout.getHeader().getBytes();

    public byte[] toByteArray(LogEvent event) {
        String result = layout.format(new LogEventAdapter(event));
        return result == null ? null : result.getBytes();

    public String toSerializable(LogEvent event) {
        return layout.format(new LogEventAdapter(event));

    public String getContentType() {
        return layout.getContentType();

    public Map<String, String> getContentFormat() {
        return new HashMap<>();

    public void encode(LogEvent event, ByteBufferDestination destination) {
        final byte[] data = toByteArray(event);
        destination.writeBytes(data, 0, data.length);



Or download all of them as a single archive file:

File name: log4j-1.2-api-2.14.1-sources.jar
File size: 168047 bytes
Release date: 2021-03-06


Source Code for Apache Log4j JMX GUI

Source Code for Apache Log4j Flume Appender

Downloading and Reviewing Apache Log4j Packages

⇑⇑ FAQ for Apache Log4j

2015-11-17, 30125👍, 0💬