/**
* 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 com.leansoft.luxun.utils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* If mx4j-tools is in the classpath call maybeLoad to load the HTTP interface of mx4j.
*
* The default port is 8082. To override that provide e.g. -Dmx4jport=8083 The default listen
* address is 0.0.0.0. To override that provide -Dmx4jaddress=127.0.0.1 This feature must be
* enabled with -Dmx4jenable=true
*
* <p>
* see https://github.com/apache/cassandra/blob/trunk/src/java/org/apache/cassandra/utils/
* Mx4jTool.java
* </p>
*
*/
public class Mx4jLoader {
private static final Logger logger = LoggerFactory.getLogger(Mx4jLoader.class);
private static Object httpAdaptor;
private static Class<?> httpAdaptorClass;
/**
* Starts a JMX over http interface if and mx4j-tools.jar is in the classpath.
*
* @return true if successfully loaded.
*/
public synchronized static boolean maybeLoad() {
try {
if (!Utils.getBoolean(System.getProperties(), "luxun_mx4jenable", false)) {
return false;
}
if (httpAdaptor != null) {
logger.warn("mx4j has started");
return true;
}
logger.debug("Will try to load mx4j now, if it's in the classpath");
//MBeanServer mbs = ManagementFactory.getPlatformMBeanServer();
//ObjectName processorName = new ObjectName("Server:name=XSLTProcessor");
httpAdaptorClass = Class.forName("mx4j.tools.adaptor.http.HttpAdaptor");
httpAdaptor = httpAdaptorClass.newInstance();
httpAdaptorClass.getMethod("setHost", String.class).invoke(httpAdaptor, getAddress());
httpAdaptorClass.getMethod("setPort", Integer.TYPE).invoke(httpAdaptor, getPort());
//ObjectName httpName = new ObjectName("system:name=http");
//mbs.registerMBean(httpAdaptor, httpName);
Utils.registerMBean(httpAdaptor, "system:name=http");
Class<?> xsltProcessorClass = Class.forName("mx4j.tools.adaptor.http.XSLTProcessor");
Object xsltProcessor = xsltProcessorClass.newInstance();
httpAdaptorClass.getMethod("setProcessor", Class.forName("mx4j.tools.adaptor.http.ProcessorMBean")).invoke(
httpAdaptor, xsltProcessor);
//mbs.registerMBean(xsltProcessor, processorName);
Utils.registerMBean(xsltProcessor, "Server:name=XSLTProcessor");
httpAdaptorClass.getMethod("start").invoke(httpAdaptor);
logger.info("mx4j successfuly loaded");
return true;
} catch (ClassNotFoundException e) {
logger.info("Will not load MX4J, mx4j-tools.jar is not in the classpath");
} catch (Exception e) {
logger.warn("Could not start register mbean in JMX", e);
}
return false;
}
public static synchronized void close() {
if (httpAdaptor == null) {
return;
}
try {
httpAdaptorClass.getMethod("stop").invoke(httpAdaptor);
} catch (Exception e) {
logger.warn("close mx4j failed. " + e.getMessage());
}
}
private static String getAddress() {
return System.getProperty("mx4jaddress", "0.0.0.0");
}
private static int getPort() {
return Utils.getInt(System.getProperties(), "mx4jport", 8082);
}
}