com.alibaba.metrics.tomcat.JMXUtils Maven / Gradle / Ivy
/*
* 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.alibaba.metrics.tomcat;
import javax.management.InstanceAlreadyExistsException;
import javax.management.JMException;
import javax.management.MBeanServer;
import javax.management.MBeanServerFactory;
import javax.management.ObjectName;
import java.lang.management.ManagementFactory;
import java.util.Set;
public class JMXUtils {
/**
* 注册一个MBean
*/
public static ObjectName register(String name, Object mbean) {
try {
ObjectName objectName = new ObjectName(name);
MBeanServer mbeanServer = getMBeanServer();
try {
mbeanServer.registerMBean(mbean, objectName);
} catch (InstanceAlreadyExistsException ex) {
mbeanServer.unregisterMBean(objectName);
mbeanServer.registerMBean(mbean, objectName);
}
return objectName;
} catch (JMException e) {
throw new IllegalArgumentException(name, e);
}
}
/**
* 取消一个MBean
*/
public static void unregister(String name) {
try {
MBeanServer mbeanServer = getMBeanServer();
mbeanServer.unregisterMBean(new ObjectName(name));
} catch (JMException e) {
throw new IllegalArgumentException(name, e);
}
}
/**
* 生成一个ObjectName，如果出错，返回null
*/
public static ObjectName createObjectName(String pattern) {
try {
return new ObjectName(pattern);
} catch (Exception ex) {
// Ignore.
}
return null;
}
/**
* 获取类型Pattern列表
*/
public static ObjectName[] getObjectNames(ObjectName pattern) {
ObjectName[] result = new ObjectName[0];
Set objectNames = getMBeanServer().queryNames(pattern, null);
if (objectNames != null && !objectNames.isEmpty()) {
result = objectNames.toArray(new ObjectName[objectNames.size()]);
}
return result;
}
public static MBeanServer getMBeanServer() {
MBeanServer mBeanServer = null;
if (MBeanServerFactory.findMBeanServer(null).size() > 0) {
mBeanServer = MBeanServerFactory.findMBeanServer(null).get(0);
} else {
mBeanServer = ManagementFactory.getPlatformMBeanServer();
}
return mBeanServer;
}
}