Apache Log4j SLF4J Binding allows applications coded to the SLF4J API to use Log4j 2 as the implementation.

Bytecode (Java 8) for Apache Log4j SLF4J Binding is provided in a separate JAR file like log4j-slf4j-impl-2.14.1.jar.

Source Code files for Apache Log4j IOStreams 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 SLF4J Binding 2.14.1 below.

⏎ org/apache/logging/slf4j/Log4jMDCAdapter.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.logging.slf4j;

import java.util.Map;

import org.apache.logging.log4j.ThreadContext;
import org.slf4j.spi.MDCAdapter;

/**
 *
 */
public class Log4jMDCAdapter implements MDCAdapter {

    @Override
    public void put(final String key, final String val) {
        ThreadContext.put(key, val);
    }

    @Override
    public String get(final String key) {
        return ThreadContext.get(key);
    }

    @Override
    public void remove(final String key) {
        ThreadContext.remove(key);
    }

    @Override
    public void clear() {
        ThreadContext.clearMap();
    }

    @Override
    public Map<String, String> getCopyOfContextMap() {
        return ThreadContext.getContext();
    }

    @Override
    @SuppressWarnings("unchecked") // nothing we can do about this, restricted by SLF4J API
    public void setContextMap(@SuppressWarnings("rawtypes") final Map map) {
        ThreadContext.clearMap();
        ThreadContext.putAll(map);
    }
}

⏎ org/apache/logging/slf4j/Log4jMDCAdapter.java

Or download all of them as a single archive file:

File name: log4j-slf4j-impl-2.14.1-sources.jar
File size: 23635 bytes
Release date: 2021-03-06
Download 

⇒ Source Code for Apache Log4j to SLF4J Adapter

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