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/async/AsyncLoggerConfigDelegate.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.async;

import org.apache.logging.log4j.Level;
import org.apache.logging.log4j.core.LogEvent;
import org.apache.logging.log4j.core.impl.LogEventFactory;
import org.apache.logging.log4j.core.jmx.RingBufferAdmin;

/**
 * Encapsulates the mechanism used to log asynchronously. There is one delegate per configuration, which is shared by
 * all AsyncLoggerConfig objects in the configuration.
 */
public interface AsyncLoggerConfigDelegate {

    /**
     * Creates and returns a new {@code RingBufferAdmin} that instruments the ringbuffer of this
     * {@code AsyncLoggerConfig}.
     *
     * @param contextName name of the {@code LoggerContext}
     * @param loggerConfigName name of the logger config
     * @return the RingBufferAdmin that instruments the ringbuffer
     */
    RingBufferAdmin createRingBufferAdmin(final String contextName, final String loggerConfigName);

    /**
     * Returns the {@code EventRoute} for the event with the specified level.
     *
     * @param level the level of the event to log
     * @return the {@code EventRoute}
     */
    EventRoute getEventRoute(final Level level);

    /**
     * Enqueues the {@link LogEvent} on the mixed configuration ringbuffer.
     * This method must only be used after {@link #tryEnqueue(LogEvent, AsyncLoggerConfig)} returns <code>false</code>
     * indicating that the ringbuffer is full, otherwise it may incur unnecessary synchronization.
     */
    void enqueueEvent(LogEvent event, AsyncLoggerConfig asyncLoggerConfig);

    boolean tryEnqueue(LogEvent event, AsyncLoggerConfig asyncLoggerConfig);

    /**
     * Notifies the delegate what LogEventFactory an AsyncLoggerConfig is using, so the delegate can determine
     * whether to populate the ring buffer with mutable log events or not. This method may be invoked multiple times
     * for all AsyncLoggerConfigs that use this delegate.
     *
     * @param logEventFactory the factory used
     */
    void setLogEventFactory(LogEventFactory logEventFactory);
}

⏎ org/apache/logging/log4j/core/async/AsyncLoggerConfigDelegate.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
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