Source Code for Apache Log4j Tag Library

Apache Log4j Tag Library creates the capability of inserting log statements in JSPs without the use of Java scripting.

Bytecode (Java 8) for Apache Log4j Tag Library is provided in a separate JAR file like log4j-taglib-2.14.1.jar.

Source Code files for Apache Log4j IOStreams 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 Tag Library 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.taglib;

import javax.servlet.jsp.JspException;
import javax.servlet.jsp.PageContext;
import javax.servlet.jsp.tagext.BodyTagSupport;
import javax.servlet.jsp.tagext.Tag;

import org.apache.logging.log4j.message.MessageFactory;

 * This class implements the {@code <log:setLogger>} tag.
 * @since 2.0
public class SetLoggerTag extends BodyTagSupport {
    private static final long serialVersionUID = 1L;

    private transient Log4jTaglibLoggerContext loggerContext;

    private transient Object logger;

    private transient MessageFactory factory;

    private String var;

    private int scope;

    public SetLoggerTag() {

    private void init() {
        this.logger = null;
        this.var = null;
        this.scope = PageContext.PAGE_SCOPE;

    public void release() {

    public void setPageContext(final PageContext pageContext) {
        this.loggerContext = Log4jTaglibLoggerContext.getInstance(pageContext.getServletContext());

    public void setLogger(final Object logger) {
        this.logger = logger;

    public void setFactory(final MessageFactory factory) {
        this.factory = factory;

    public void setVar(final String var) {
        this.var = var;

    public void setScope(final String scope) {
        this.scope = TagUtils.getScope(scope);

    public int doEndTag() throws JspException {
        final Log4jTaglibLogger logger = TagUtils.resolveLogger(this.loggerContext, this.logger, this.factory);

        if (this.var != null) {
            this.pageContext.setAttribute(this.var, logger, this.scope);
        } else {
            TagUtils.setDefaultLogger(this.pageContext, logger);

        return Tag.EVAL_PAGE;



Or download all of them as a single archive file:

File name: log4j-taglib-2.14.1-sources.jar
File size: 33902 bytes
Release date: 2021-03-06


Source Code for Apache Log4j Flume Appender

Source Code for Apache Log4j Web Servlet Containers

Downloading and Reviewing Apache Log4j Packages

⇑⇑ FAQ for Apache Log4j

2015-11-04, 8257👍, 0💬