监控WebLogic 9.x和10.x解决方案（监控应用服务器系列文章）

前言：做了一个监控应用服务器的项目（支持Tocmat、WebSphere、WebLogic各版本）， 过程也算是磕磕绊绊，由于网上缺少相关资料，或者深陷于知识的海洋难以寻觅到有效的资料，因而走过不少弯路，遇过不少困难。为了留下点印记，给后来人留下 点经验之谈，助之少走弯路，故将这些经验整理出来，与大家分享。水平有限，难免疏漏，还望指正。如有疑问，欢迎留言，或者加入Q群参与讨 论：35526521。

 

 

其实学习一项新的技术，刚开始最困难就是难以找到有效的资料，OK，首先分享几个官方文档的地址：

 

几个重要的官方文档地址

——相当于葵花宝典的功效（放心，不需自宫）

 

一、使用 JMX 开发自定义管理实用工具

http://www.oraclefmw.com/wls92/jmx/index.html

这是针对WebLogic 9.2的中文版，第一好东西，里面不仅讲解有原理讲解，还有Demo和教程

 

二、使用JMX访问WebLogic Server MBean的Demo和教程

● WebLogic 9.x：

http://download.oracle.com/docs/cd/E13222_01/wls/docs90/jmx/accessWLS.html

● WebLogic 10.x：

http://download.oracle.com/docs/cd/E11035_01/wls100/jmx/accessWLS.html

 

三、WebLogic的MBean参考手册

http://download.oracle.com/docs/cd/E14571_01/apirefs.1111/e13951/core/index.html

有了MBean参考手册，想要监控什么指标，直接到里面找，纯粹是体力活，剩下的就是考虑怎么把代码写得简单可用（Clean code that works ）了

 

只要有了这几个地址，开发监控WebLogic 9.x和10.x的项目就变得简单了。想当年，我就是在找资料上花费了大把大把的时间，而且那绝对是相当的痛苦。如果你不是第一时间看到了这篇文章，相信你一定感同身受吧！但是恭喜你，现在你不用那么痛苦了，哈哈，开个玩笑……

 

 

访问WebLogic使用的JAR包

◆ 访问WebLogic 9.x所使用的JAR包：

wlclient.jar、wljmxclient.jar

在%WL_HOME%\server\lib目录下

 

◆ 访问WebLogic 10.x所使用的JAR包：

由于10.x的API有变化，必须使用JarBuilder Tool生成wlfullclient.jar，具体参见官方的教程，上面的“葵花宝典”里面有链接。

 

◆ 监控所依赖的JAR包的存放位置

 

我们会通过这种方式获取和MBean Server的连接：

------------------------------------------------------------------------------------------------------------------------------

JMXConnector connector = JMXConnectorFactory.connect(serviceURL, h);

------------------------------------------------------------------------------------------------------------------------------

 

代码在Eclipse下通过Java程序调用没有任何问题，作为Web应用部署到Tocmat就出问题了，会报如下异常：

------------------------------------------------------------------------------------------------------------------------------

Unsupported protocol: t3

------------------------------------------------------------------------------------------------------------------------------

 

具体原因如下（这是找了很久以后在一个国外的论坛上看到的）：

------------------------------------------------------------------------------------------------------------------------------

Here's the issue that I'm facing:
To get a JMX connection using JMXConnectionFactory using below: JMXConnector connector = JMXConnectorFactory.connect(serviceURL, h);
I have to rely on classes in weblogic.jar
That is because the implementation of JMXConnector is in weblogic.jar. However, the interface/abstract class for JMXConnectionFactory lives in rt.jar that comes with JDK1.5 or JDK1.6.
Because rt.jar is (probably) used by the bootstrap classloader, I HAVE to include weblogic.jar in the CATALINA_HOME/common/lib directory. If I do so, I can get the JMX part of the solution to work because both, rt.jar and weblogic.jar are loaded by the same (system) classloader.

------------------------------------------------------------------------------------------------------------------------------

 

解决办法很简单： 将wlfullclient.jar放到Tomcat安装目录下的lib目录下即可。

------------------------------------------------------------------------------------------------------------------------------

刚发现这个问题时很是诧异，始终想不通，后来在老外的一个论坛上找到类似问题，原来， JMXConnector接口是在JDK1.5/JDK1.6的rt.jar里面，而具体实现是在wlfullclient.jar里面。问题就在这里， rt.jar是由系统类加载器加载的， wlfullclient.jar如果放在自己的WEB-INFO/lib目录下，就是由WebappClassLoader去加载了。所以我们将wlfullclient.jar放到Tomcat安装目录下的lib目录下，这样wlfullclient.jar跟rt.jar就是由同一个classloader加载的了，所以问题就迎刃而解了。

------------------------------------------------------------------------------------------------------------------------------

 

 

一个Demo：采集Web应用的Servlet信息

public class MonitorServlets {
	private static MBeanServerConnection connection;
	private static JMXConnector connector;
	private static final ObjectName service;

	// Initializing the object name for DomainRuntimeServiceMBean
	// so it can be used throughout the class.
	static {
		try {
			service = new ObjectName(
					"com.bea:Name=DomainRuntimeService,Type=weblogic.management.mbeanservers.domainruntime.DomainRuntimeServiceMBean");
		} catch (MalformedObjectNameException e) {
			throw new AssertionError(e.getMessage());
		}
	}

	/**
	 * 测试本地的WebLogic10.3
	 */
	public static void main1(String[] args) throws Exception {
		String hostname = "localhost";
		String portString = "7001";
		String username = "weblogic";
		String password = "weblogic123";
		MonitorServlets monitor = new MonitorServlets();
		initConnection(hostname, portString, username, password);
		monitor.getServletData();
		connector.close();
	}

	/**
	 * 测试192.168.1.5服务器上的WebLogic9.2
	 */
	public static void main(String[] args) throws Exception {
		String hostname = "192.168.1.5";
		String portString = "7001";
		String username = "weblogic";
		String password = "weblogic";
		MonitorServlets monitor = new MonitorServlets();
		initConnection(hostname, portString, username, password);
		monitor.getServletData();
		connector.close();
	}

	/**
	 * Initialize connection to the Domain Runtime MBean Server
	 * 
	 * @param hostname
	 * @param portString
	 * @param username
	 * @param password
	 * @throws IOException
	 * @throws MalformedURLException
	 */
	public static void initConnection(String hostname, String portString,
			String username, String password) throws IOException,
			MalformedURLException {
		String protocol = "t3";
		Integer portInteger = Integer.valueOf(portString);
		int port = portInteger.intValue();
		String jndiroot = "/jndi/";
		String mserver = "weblogic.management.mbeanservers.domainruntime";
		JMXServiceURL serviceURL = new JMXServiceURL(protocol, hostname, port,
				jndiroot + mserver);
		Hashtable<String, String> h = new Hashtable<String, String>();
		h.put(Context.SECURITY_PRINCIPAL, username);
		h.put(Context.SECURITY_CREDENTIALS, password);
		h.put(JMXConnectorFactory.PROTOCOL_PROVIDER_PACKAGES,
				"weblogic.management.remote");
		connector = JMXConnectorFactory.connect(serviceURL, h);
		connection = connector.getMBeanServerConnection();
	}

	/**
	 * Get an array of ServerRuntimeMBeans
	 * 
	 * @return
	 * @throws Exception
	 */
	public static ObjectName[] getServerRuntimes() throws Exception {
		return (ObjectName[]) connection
				.getAttribute(service, "ServerRuntimes");
	}

	/**
	 * Get an array of WebApplicationComponentRuntimeMBeans
	 * 
	 * @throws Exception
	 */
	public void getServletData() throws Exception {
		ObjectName[] serverRT = getServerRuntimes();
		int length = (int) serverRT.length;
		for (int i = 0; i < length; i++) {
			System.out
					.println("===========================================ServerRuntimes");
			String name = (String) connection.getAttribute(serverRT[i], "Name");
			String state = (String) connection.getAttribute(serverRT[i],
					"State");
			System.out.println("Server name: " + name + ".Server state: "
					+ state);

			ObjectName[] appRT = (ObjectName[]) connection.getAttribute(
					serverRT[i], "ApplicationRuntimes");
			int appLength = (int) appRT.length;
			for (int x = 0; x < appLength; x++) {
				System.out
						.println("-------------------------------------------ApplicationRuntimes");
				System.out.println("Application name: "
						+ (String) connection.getAttribute(appRT[x], "Name"));

				ObjectName[] compRT = (ObjectName[]) connection.getAttribute(
						appRT[x], "ComponentRuntimes");
				int compLength = (int) compRT.length;
				for (int y = 0; y < compLength; y++) {
					String componentName = (String) connection.getAttribute(
							compRT[y], "Name");
					String componentType = (String) connection.getAttribute(
							compRT[y], "Type");
					System.out.println("  Component name: " + componentName
							+ " , Component type: " + componentType);

					if (componentType.toString().equals(
							"WebAppComponentRuntime")) {
						ObjectName[] servletRTs = (ObjectName[]) connection
								.getAttribute(compRT[y], "Servlets");
						int servletLength = (int) servletRTs.length;
						for (int z = 0; z < servletLength; z++) {
							System.out.println("    Servlet name: "
									+ (String) connection.getAttribute(
											servletRTs[z], "Name"));
							System.out.println("       Servlet context path: "
									+ (String) connection.getAttribute(
											servletRTs[z], "ContextPath"));
							System.out
									.println("       Invocation Total Count : "
											+ (Object) connection.getAttribute(
													servletRTs[z],
													"InvocationTotalCount"));
						}
					}
				}
			}
		}
	}

}