Apache Log4j Core Implementation provides the functional components of the logging system. Users are free to create their own plugins and include them in the logging configuration. Apache Log4j Core is a required module to use Apache Log4j.

Bytecode (Java 8) for Apache Log4j Core Implementation is provided in a separate JAR file like log4j-core-2.14.1.jar.

Source Code files for Apache Log4j API 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 Core Implementation 2.14.1 below.

⏎ org/apache/logging/log4j/core/jmx/RingBufferAdminMBean.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.log4j.core.jmx;

/**
 * The MBean interface for monitoring and managing an LMAX Disruptor ring
 * buffer.
 */
public interface RingBufferAdminMBean {
    /**
     * ObjectName pattern ({@value}) for the RingBufferAdmin MBean that instruments
     * the global {@code AsyncLogger} ring buffer.
     * This pattern contains one variable: the name of the context.
     * <p>
     * You can find the registered RingBufferAdmin MBean for the global AsyncLogger like this:
     * </p>
     * <pre>
     * MBeanServer mbs = ManagementFactory.getPlatformMBeanServer();
     * String pattern = String.format(RingBufferAdminMBean.PATTERN_ASYNC_LOGGER, &quot;*&quot;);
     * Set&lt;ObjectName&gt; asyncLoggerNames = mbs.queryNames(new ObjectName(pattern), null);
     * </pre>
     */
    String PATTERN_ASYNC_LOGGER = Server.DOMAIN + ":type=%s,component=AsyncLoggerRingBuffer";

    /**
     * ObjectName pattern ({@value}) for RingBufferAdmin MBeans that instrument
     * {@code AsyncLoggerConfig} ring buffers.
     * This pattern contains three variables, where the first is the name of the
     * context, the second and third are identical and the name of the instrumented logger config.
     * <p>
     * You can find all registered RingBufferAdmin MBeans like this:
     * </p>
     * <pre>
     * MBeanServer mbs = ManagementFactory.getPlatformMBeanServer();
     * String pattern = String.format(RingBufferAdminMBean.PATTERN_ASYNC_LOGGER_CONFIG, &quot;*&quot;, &quot;*&quot;);
     * Set&lt;ObjectName&gt; asyncConfigNames = mbs.queryNames(new ObjectName(pattern), null);
     * </pre>
     */
    String PATTERN_ASYNC_LOGGER_CONFIG = Server.DOMAIN + ":type=%s,component=Loggers,name=%s,subtype=RingBuffer";

    /**
     * Returns the number of slots that the ring buffer was configured with.
     * Disruptor ring buffers are bounded-size data structures, this number does
     * not change during the life of the ring buffer.
     *
     * @return the number of slots that the ring buffer was configured with
     */
    long getBufferSize();

    /**
     * Returns the number of available slots in the ring buffer. May vary wildly
     * between invocations.
     *
     * @return the number of available slots in the ring buffer
     */
    long getRemainingCapacity();
}

⏎ org/apache/logging/log4j/core/jmx/RingBufferAdminMBean.java

Or download all of them as a single archive file:

File name: log4j-core-2.14.1-sources.jar
File size: 1281358 bytes
Release date: 2021-03-06
Download 

⇒ Source Code for Apache Log4j JDK Logging Adapter

⇐ Source Code for Apache Log4j API

⇑ Downloading and Reviewing Apache Log4j Packages

⇑⇑ FAQ for Apache Log4j