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/AsyncAppenderAdmin.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;

import java.util.Objects;

import javax.management.ObjectName;

import org.apache.logging.log4j.core.appender.AsyncAppender;

/**
 * Implementation of the {@code AsyncAppenderAdminMBean} interface.
 */
public class AsyncAppenderAdmin implements AsyncAppenderAdminMBean {

    private final String contextName;
    private final AsyncAppender asyncAppender;
    private final ObjectName objectName;

    /**
     * Constructs a new {@code AsyncAppenderAdmin} with the specified contextName
     * and async appender.
     *
     * @param contextName used in the {@code ObjectName} for this mbean
     * @param appender the instrumented object
     */
    public AsyncAppenderAdmin(final String contextName, final AsyncAppender appender) {
        // super(executor); // no notifications for now
        this.contextName = Objects.requireNonNull(contextName, "contextName");
        this.asyncAppender = Objects.requireNonNull(appender, "async appender");
        try {
            final String ctxName = Server.escape(this.contextName);
            final String configName = Server.escape(appender.getName());
            final String name = String.format(PATTERN, ctxName, configName);
            objectName = new ObjectName(name);
        } catch (final Exception e) {
            throw new IllegalStateException(e);
        }
    }

    /**
     * Returns the {@code ObjectName} of this mbean.
     *
     * @return the {@code ObjectName}
     * @see AppenderAdminMBean#PATTERN
     */
    public ObjectName getObjectName() {
        return objectName;
    }

    @Override
    public String getName() {
        return asyncAppender.getName();
    }

    @Override
    public String getLayout() {
        return String.valueOf(asyncAppender.getLayout());
    }

    @Override
    public boolean isIgnoreExceptions() {
        return asyncAppender.ignoreExceptions();
    }

    @Override
    public String getErrorHandler() {
        return String.valueOf(asyncAppender.getHandler());
    }

    @Override
    public String getFilter() {
        return String.valueOf(asyncAppender.getFilter());
    }

    @Override
    public String[] getAppenderRefs() {
        return asyncAppender.getAppenderRefStrings();
    }

    /**
     * Returns {@code true} if this AsyncAppender will take a snapshot of the stack with
     * every log event to determine the class and method where the logging call
     * was made.
     * @return {@code true} if location is included with every event, {@code false} otherwise
     */
    @Override
    public boolean isIncludeLocation() {
        return asyncAppender.isIncludeLocation();
    }

    /**
     * Returns {@code true} if this AsyncAppender will block when the queue is full,
     * or {@code false} if events are dropped when the queue is full.
     * @return whether this AsyncAppender will block or drop events when the queue is full.
     */
    @Override
    public boolean isBlocking() {
        return asyncAppender.isBlocking();
    }

    /**
     * Returns the name of the appender that any errors are logged to or {@code null}.
     * @return the name of the appender that any errors are logged to or {@code null}
     */
    @Override
    public String getErrorRef() {
        return asyncAppender.getErrorRef();
    }

    @Override
    public int getQueueCapacity() {
        return asyncAppender.getQueueCapacity();
    }

    @Override
    public int getQueueRemainingCapacity() {
        return asyncAppender.getQueueRemainingCapacity();
    }
}

⏎ org/apache/logging/log4j/core/jmx/AsyncAppenderAdmin.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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