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Reload4j revives EOLed log4j 1.x
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/*
 * 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.log4j.jmx;

import org.apache.log4j.Logger;

import javax.management.JMException;
import javax.management.MBeanServer;
import javax.management.MBeanServerFactory;
import javax.management.ObjectName;
import java.lang.reflect.InvocationTargetException;
import java.io.InterruptedIOException;

/**
 * Manages an instance of com.sun.jdmk.comm.HtmlAdapterServer which was provided
 * for demonstration purposes in the Java Management Extensions Reference
 * Implementation 1.2.1. This class is provided to maintain compatibility with
 * earlier versions of log4j and use in new code is discouraged.
 *
 * @deprecated
 */
public class Agent {

    /**
     * Diagnostic logger.
     * 
     * @deprecated
     */
    static Logger log = Logger.getLogger(Agent.class);

    /**
     * Create new instance.
     * 
     * @deprecated
     */
    public Agent() {
    }

    /**
     * Creates a new instance of com.sun.jdmk.comm.HtmlAdapterServer using
     * reflection.
     *
     * @since 1.2.16
     * @return new instance.
     */
    private static Object createServer() {
	Object newInstance = null;
	try {
	    newInstance = Class.forName("com.sun.jdmk.comm.HtmlAdapterServer").newInstance();
	} catch (ClassNotFoundException ex) {
	    throw new RuntimeException(ex.toString());
	} catch (InstantiationException ex) {
	    throw new RuntimeException(ex.toString());
	} catch (IllegalAccessException ex) {
	    throw new RuntimeException(ex.toString());
	}
	return newInstance;
    }

    /**
     * Invokes HtmlAdapterServer.start() using reflection.
     *
     * @since 1.2.16
     * @param server instance of com.sun.jdmk.comm.HtmlAdapterServer.
     */
    private static void startServer(final Object server) {
	try {
	    server.getClass().getMethod("start", new Class[0]).invoke(server, new Object[0]);
	} catch (InvocationTargetException ex) {
	    Throwable cause = ex.getTargetException();
	    if (cause instanceof RuntimeException) {
		throw (RuntimeException) cause;
	    } else if (cause != null) {
		if (cause instanceof InterruptedException || cause instanceof InterruptedIOException) {
		    Thread.currentThread().interrupt();
		}
		throw new RuntimeException(cause.toString());
	    } else {
		throw new RuntimeException();
	    }
	} catch (NoSuchMethodException ex) {
	    throw new RuntimeException(ex.toString());
	} catch (IllegalAccessException ex) {
	    throw new RuntimeException(ex.toString());
	}
    }

    /**
     * Starts instance of HtmlAdapterServer.
     * 
     * @deprecated
     */
    public void start() {

	MBeanServer server = MBeanServerFactory.createMBeanServer();
	Object html = createServer();

	try {
	    log.info("Registering HtmlAdaptorServer instance.");
	    server.registerMBean(html, new ObjectName("Adaptor:name=html,port=8082"));
	    log.info("Registering HierarchyDynamicMBean instance.");
	    HierarchyDynamicMBean hdm = new HierarchyDynamicMBean();
	    server.registerMBean(hdm, new ObjectName("log4j:hiearchy=default"));
	} catch (JMException e) {
	    log.error("Problem while registering MBeans instances.", e);
	    return;
	} catch (RuntimeException e) {
	    log.error("Problem while registering MBeans instances.", e);
	    return;
	}
	startServer(html);
    }
}