Apache Log4j API provides the interface that applications should code to and provides the adapter components required for implementers to create a logging implementation. Apache Log4j API is a required module to use Apache Log4j.

Bytecode (Java 8) for Apache Log4j API is provided in a separate JAR file like log4j-api-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 API 2.14.1 below.

⏎ org/apache/logging/log4j/EventLogger.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;

import org.apache.logging.log4j.message.StructuredDataMessage;
import org.apache.logging.log4j.spi.ExtendedLogger;

/**
 *  Logs "Events" that are represented as {@link StructuredDataMessage}.
 */
public final class EventLogger {

    /**
     * Defines the Event Marker.
     */
    public static final Marker EVENT_MARKER = MarkerManager.getMarker("EVENT");

    private static final String NAME = "EventLogger";

    private static final String FQCN = EventLogger.class.getName();

    private static final ExtendedLogger LOGGER = LogManager.getContext(false).getLogger(NAME);

    private EventLogger() {
        // empty
    }

    /**
     * Logs events with a level of ALL.
     * @param msg The event StructuredDataMessage.
     */
    public static void logEvent(final StructuredDataMessage msg) {
        LOGGER.logIfEnabled(FQCN, Level.OFF, EVENT_MARKER, msg, null);
    }

    /**
     * Logs events and specify the logging level.
     * @param msg The event StructuredDataMessage.
     * @param level The logging Level.
     */
    public static void logEvent(final StructuredDataMessage msg, final Level level) {
        LOGGER.logIfEnabled(FQCN, level, EVENT_MARKER, msg, null);
    }
}

⏎ org/apache/logging/log4j/EventLogger.java

Or download all of them as a single archive file:

File name: log4j-api-2.14.1-sources.jar
File size: 264773 bytes
Release date: 2021-03-06
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