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/bridge/LayoutAdapter.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.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;
    }


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

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

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

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

    @Override
    public String getContentType() {
        return layout.getContentType();
    }

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

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

⏎ org/apache/log4j/bridge/LayoutAdapter.java

 

⇒ Source Code for Apache Log4j JMX GUI

⇐ Source Code for Apache Log4j Flume Appender

⇑ Downloading and Reviewing Apache Log4j Packages

⇑⇑ FAQ for Apache Log4j