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/config/ReliabilityStrategy.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.config;

import org.apache.logging.log4j.Level;
import org.apache.logging.log4j.Marker;
import org.apache.logging.log4j.core.LogEvent;
import org.apache.logging.log4j.message.Message;
import org.apache.logging.log4j.util.Supplier;

/**
 * Interface for objects that know how to ensure delivery of log events to the appropriate appenders, even during and
 * after the configuration has been modified while the system is actively used.
 */
public interface ReliabilityStrategy {

    /**
     * Logs an event.
     *
     * @param reconfigured supplies the next LoggerConfig if the strategy's LoggerConfig is no longer active
     * @param loggerName The name of the Logger.
     * @param fqcn The fully qualified class name of the caller.
     * @param marker A Marker or null if none is present.
     * @param level The event Level.
     * @param data The Message.
     * @param t A Throwable or null.
     */
    void log(Supplier<LoggerConfig> reconfigured, String loggerName, String fqcn, Marker marker, Level level,
            Message data, Throwable t);

    /**
     * Logs an event.
     *
     * @param reconfigured supplies the next LoggerConfig if the strategy's LoggerConfig is no longer active
     * @param event The log event.
     */
    void log(Supplier<LoggerConfig> reconfigured, LogEvent event);

    /**
     * For internal use by the ReliabilityStrategy; returns the LoggerConfig to use.
     *
     * @param next supplies the next LoggerConfig if the strategy's LoggerConfig is no longer active
     * @return the currently active LoggerConfig
     */
    LoggerConfig getActiveLoggerConfig(Supplier<LoggerConfig> next);

    /**
     * Called after a log event was logged.
     */
    void afterLogEvent();

    /**
     * Called before all appenders are stopped.
     */
    void beforeStopAppenders();

    /**
     * Called before the configuration is stopped.
     *
     * @param configuration the configuration that will be stopped
     */
    void beforeStopConfiguration(Configuration configuration);

}

⏎ org/apache/logging/log4j/core/config/ReliabilityStrategy.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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