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 apache-log4j-2.14.1-bin.zip and source package like apache-log4j-2.14.1-src.zip. 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.

⏎ org/apache/log4j/or/ThreadGroupRenderer.java

/*
 * 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
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the license for the specific language governing permissions and
 * limitations under the license.
 */
package org.apache.log4j.or;

import org.apache.log4j.Layout;

/**
 */
public class ThreadGroupRenderer implements ObjectRenderer {

    @Override
    public
    String  doRender(Object obj) {
        if(obj instanceof ThreadGroup) {
            StringBuilder sb = new StringBuilder();
            ThreadGroup threadGroup = (ThreadGroup) obj;
            sb.append("java.lang.ThreadGroup[name=");
            sb.append(threadGroup.getName());
            sb.append(", maxpri=");
            sb.append(threadGroup.getMaxPriority());
            sb.append("]");
            Thread[] threads = new Thread[threadGroup.activeCount()];
            threadGroup.enumerate(threads);
            for (Thread thread : threads) {
                sb.append(Layout.LINE_SEP);
                sb.append("   Thread=[");
                sb.append(thread.getName());
                sb.append(",");
                sb.append(thread.getPriority());
                sb.append(",");
                sb.append(thread.isDaemon());
                sb.append("]");
            }
            return sb.toString();
        }
        try {
            // this is the best we can do
            return obj.toString();
        } catch(Exception ex) {
            return ex.toString();
        }
    }
}

⏎ org/apache/log4j/or/ThreadGroupRenderer.java

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
Download 

⇒ Source Code for Apache Log4j JMX GUI

⇐ Source Code for Apache Log4j Flume Appender

⇑ Downloading and Reviewing Apache Log4j Packages

⇑⇑ FAQ for Apache Log4j