Tomcat学习--tomcat运行状态监控

朴灿烈づ我的快乐病毒、 2022-05-26 12:28 307阅读 0赞

上一篇博客[Tomcat学习--war服务相关状态信息监控][Tomcat_--war]中我们已经了解了一下对war包的启动、停止、运行状态、重载和卸载操作的实现机制，接下来我们用这篇博客了解一下tomcat运行过程中服务器，操作系统，jvm和war的一些状态信息。

目前tomcat将运行的过程中的一些状态信息通过JMX的MBeanServer机制保存起来，所以目前的实现就是通过MBeanServer来获取数据就好，可以参考tomcat的StatusManagerServlet的实现逻辑。

本篇博客只是简单的获取了一些数据进行展示

1、web.xml中配置如下

<servlet>
        <servlet-name>tomcat-monitor-info</servlet-name>
        <servlet-class>com.tianjunwei.tomcat.servlet.MonitorInfoServlet</servlet-class>
      </servlet>
      <servlet-mapping>
        <servlet-name>tomcat-monitor-info</servlet-name>
        <url-pattern>/tomcat_monitor_info</url-pattern>
      </servlet-mapping>

2、实现源码如下：

public class MonitorInfoServlet  extends HttpServlet implements NotificationListener {
    
    	private static final long serialVersionUID = 1L;
    
    	protected static MBeanServer mBeanServer = null;
    	
    	protected final Vector<ObjectName> protocolHandlers = new Vector<>();
    	
    	protected final Vector<ObjectName> threadPools = new Vector<>();
    	
        protected final Vector<ObjectName> globalRequestProcessors = new Vector<>();
        
        protected final Vector<ObjectName> requestProcessors = new Vector<>();
    	
    	@Override
    	public void init() throws ServletException {
    
    		// Retrieve the MBean server
    		mBeanServer = Registry.getRegistry(null, null).getMBeanServer();
    
    		try {
    
    			// Query protocol handlers
    			String onStr = "*:type=ProtocolHandler,*";
    			ObjectName objectName = new ObjectName(onStr);
    			Set<ObjectInstance> set = mBeanServer.queryMBeans(objectName, null);
    			Iterator<ObjectInstance> iterator = set.iterator();
    			while (iterator.hasNext()) {
    				ObjectInstance oi = iterator.next();
    				protocolHandlers.addElement(oi.getObjectName());
    			}
    
    			// Query Thread Pools
    			onStr = "*:type=ThreadPool,*";
    			objectName = new ObjectName(onStr);
    			set = mBeanServer.queryMBeans(objectName, null);
    			iterator = set.iterator();
    			while (iterator.hasNext()) {
    				ObjectInstance oi = iterator.next();
    				threadPools.addElement(oi.getObjectName());
    			}
    
    			// Query Global Request Processors
    			onStr = "*:type=GlobalRequestProcessor,*";
    			objectName = new ObjectName(onStr);
    			set = mBeanServer.queryMBeans(objectName, null);
    			iterator = set.iterator();
    			while (iterator.hasNext()) {
    				ObjectInstance oi = iterator.next();
    				globalRequestProcessors.addElement(oi.getObjectName());
    			}
    
    			// Query Request Processors
    			onStr = "*:type=RequestProcessor,*";
    			objectName = new ObjectName(onStr);
    			set = mBeanServer.queryMBeans(objectName, null);
    			iterator = set.iterator();
    			while (iterator.hasNext()) {
    				ObjectInstance oi = iterator.next();
    				requestProcessors.addElement(oi.getObjectName());
    			}
    
    			// Register with MBean server
    			onStr = "JMImplementation:type=MBeanServerDelegate";
    			objectName = new ObjectName(onStr);
    			mBeanServer.addNotificationListener(objectName, this, null, null);
    
    		} catch (Exception e) {
    			e.printStackTrace();
    		}
    
    	}
    	
    	public void doGet(HttpServletRequest request, HttpServletResponse response)
    		    throws IOException{
    		PrintWriter writer = response.getWriter();
    		Map<String, Object> dataMap = new HashMap<String,Object>();
    		dataMap.put("server", getServerData());
    		dataMap.put("os", getOsData());
    		dataMap.put("jvm", getJVMData());
    		dataMap.put("war", getWarData());
    		writer.write(JSON.toJSONString(dataMap));
    		writer.flush();
    	}
    	
    	/**
    	 * 获取操作系统及jvm相关的信息
    	 */
    	public static Map<String, Object> getServerData(){
    		
    		Map<String, Object> serverMap =new HashMap<String, Object>();
    		serverMap.put("tomcat_version", ServerInfo.getServerInfo());
    		serverMap.put("jvm_version", System.getProperty("java.runtime.version"));
    		serverMap.put("jvm_vendor", System.getProperty("java.vm.vendor"));
    		serverMap.put("os_name", System.getProperty("os.name"));
    		serverMap.put("os_version", System.getProperty("os.version"));
    		serverMap.put("os_arch", System.getProperty("os.arch"));
    		
            try {
                InetAddress address = InetAddress.getLocalHost();
                serverMap.put("hostName", address.getHostName());
                serverMap.put("hostAddress", address.getHostAddress());
             } catch (UnknownHostException e) {
            	 serverMap.put("hostName", "-");
                 serverMap.put("hostAddress", "-");
            }
    		return serverMap;
    	}
    	
    	/**
    	 * 
    	 * 获取操作系统相关信息
    	 */
    	public static Map<String, Object> getOsData(){
    		Map<String, Object> osMap = new HashMap<String, Object>();
    		long[] result = new long[16];
    	    boolean ok = false;
    	    try {
    	    	String methodName = "info";
    	    	Class<?> paramTypes[] = new Class[1];
    	    	paramTypes[0] = result.getClass();
    	    	Object paramValues[] = new Object[1];
    	    	paramValues[0] = result;
    	    	Method method = Class.forName("org.apache.tomcat.jni.OS")
    	                .getMethod(methodName, paramTypes);
    	    	method.invoke(null, paramValues);
    	    	ok = true;
    	    } catch (Throwable t) {
    	    	t = ExceptionUtils.unwrapInvocationTargetException(t);
    	    	ExceptionUtils.handleThrowable(t);
    	    }
    
    	    if (ok) {
    	    	osMap.put(" Physical memory",formatSize(Long.valueOf(result[0]), true));
    	    	osMap.put(" Available memory: ",formatSize(Long.valueOf(result[1]), true));
    	    	osMap.put(" Total page file: ",formatSize(Long.valueOf(result[2]), true));
    	    	osMap.put(" Free page file: ",formatSize(Long.valueOf(result[3]), true));
    	    	osMap.put(" Memory load: ",Long.valueOf(result[6]));
    	    	osMap.put(" Process kernel time: ",formatTime(Long.valueOf(result[11] / 1000), true));
    	    	osMap.put(" Process user time: ",formatTime(Long.valueOf(result[12] / 1000), true));
    	    }
    		return osMap;
    	}
    	
    	public static Map<String, Object> getJVMData(){
    		Map<String, Object> jvmMap = new HashMap<String,Object>();
    		SortedMap<String, MemoryPoolMXBean> memoryPoolMBeans = new TreeMap<>();
            for (MemoryPoolMXBean mbean: ManagementFactory.getMemoryPoolMXBeans()) {
                String sortKey = mbean.getType() + ":" + mbean.getName();
                memoryPoolMBeans.put(sortKey, mbean);
            }
            jvmMap.put("free_memory",Runtime.getRuntime().freeMemory());
            jvmMap.put("total_memory",Runtime.getRuntime().totalMemory());
            jvmMap.put("max_memory" , Runtime.getRuntime().maxMemory());
    
            List<Map<String, Object>> memory_list = new ArrayList<Map<String, Object>>();
            jvmMap.put("memory_pool", memory_list);
            for (MemoryPoolMXBean memoryPoolMBean : memoryPoolMBeans.values()) {
                MemoryUsage usage = memoryPoolMBean.getUsage();
                Map<String, Object> useMap = new HashMap<String, Object>();
                useMap.put("name",memoryPoolMBean.getName());
                useMap.put("type",memoryPoolMBean.getType());
                useMap.put("usageInit",usage.getInit());
                useMap.put("usageCommitted",usage.getCommitted());
                useMap.put("usageMax",usage.getMax());
                useMap.put("usageUsed",usage.getUsed());
                memory_list.add(useMap);
            }
            return jvmMap;
    	}
    	
    	
    	
    	public static Map<String,Object> getWarData(){
    		Map<String,Object> dataMap=new HashMap<String, Object>();
    		try {
    			//堆使用
    			ObjectName heapObjName = new ObjectName("java.lang:type=Memory");
    			MemoryUsage heapMemoryUsage = MemoryUsage
    					.from((CompositeDataSupport) mBeanServer.getAttribute(heapObjName, "HeapMemoryUsage"));
    			dataMap.put("memoryUse", heapMemoryUsage.getUsed());
    			dataMap.put("memoryMax", heapMemoryUsage.getMax());
    			ObjectName runtimeObjName = new ObjectName("java.lang:type=Runtime");
    			RuntimeMXBean runtimeMXBean=ManagementFactory.getPlatformMXBean
    					(mBeanServer, RuntimeMXBean.class); 
    			dataMap.put("uptime",runtimeMXBean.getUptime());
    			//永久代使用
    			ObjectName metaObjName = new ObjectName("java.lang:type=MemoryPool,name=Metaspace");
    			MemoryUsage metaMemoryUsage = MemoryUsage
    					.from((CompositeDataSupport) mBeanServer.getAttribute(metaObjName, "Usage"));
    			dataMap.put("metaspaceUse", (int)(metaMemoryUsage.getUsed()/(1024*1024)));
    			dataMap.put("metaspaceMax", (int)(metaMemoryUsage.getMax()/(1024*1024)));
    			//线程数连接数
    			ObjectName threadObjName = new ObjectName("Catalina:type=ThreadPool,name=*");
    			ObjectName threadMXBean=mBeanServer.queryNames(threadObjName, null).iterator().next();
    			dataMap.put("connectionCount", mBeanServer.getAttribute(threadMXBean, "connectionCount"));
    			dataMap.put("maxConnections", mBeanServer.getAttribute(threadMXBean, "maxConnections"));
    			dataMap.put("currentThreadCount", mBeanServer.getAttribute(threadMXBean, "currentThreadCount"));
    			dataMap.put("maxThreads", mBeanServer.getAttribute(threadMXBean, "maxThreads"));
    
    			//请求、错误请求、发送接收数据量
    			ObjectName grpObjName = new ObjectName("Catalina:type=GlobalRequestProcessor,*");
    			ObjectName requObjName=mBeanServer.queryNames(grpObjName, null).iterator().next();
    			dataMap.put("requestCount", mBeanServer.getAttribute(requObjName, "requestCount"));
    			dataMap.put("errorCount", mBeanServer.getAttribute(requObjName, "errorCount"));
    			//context
    			Host host = MyHostConfig.myHost;
    			List<Map<String,Object>> contexts=new ArrayList<Map<String,Object>>();
    			for(Container container:host.findChildren()){
    				Context context=(Context)container;
    				String name=context.getName().trim();
    				if("".equals(name)){
    					continue;
    				}
    				contexts.add(parseContext(context,mBeanServer));
    			}
    			dataMap.put("contexts", contexts);
    		} catch (Exception e) {
    			e.printStackTrace();
    		}
    
    		return dataMap;
    	}
    	
    	private static Map<String,Object> parseContext(Context context,MBeanServer mbsc) throws Exception{
    		Map<String,Object> contextMap=new HashMap<String,Object>();
    		ObjectName objectName=context.getObjectName();		
    		contextMap.put("name", context.getName().trim());
    		contextMap.put("state", context.getStateName());
    /*		contextMap.put("sessionTimeout", context.getSessionTimeout());*/
    		contextMap.put("requestCount", mbsc.getAttribute(objectName, "requestCount"));
    		contextMap.put("errorCount", mbsc.getAttribute(objectName, "errorCount"));
    		Manager manager=context.getManager();
    		Session[] sessions=manager.findSessions();
    		contextMap.put("sessionCount", sessions.length);
    		List<Map<String,Object>> sessionsInfo=new ArrayList<>();
    		for(int i=0;i<sessions.length;i++){
    			Map<String,Object> session=new HashMap<>();
    			session.put("sessionId", sessions[i].getId());
    //			session.put("viewIp", sessions[i].getSession().ge);
    			session.put("idleTIme", sessions[i].getIdleTime());
    			session.put("inactiveIntervalTime", sessions[i].getMaxInactiveInterval());
    			session.put("lastAcessTime", sessions[i].getLastAccessedTime());
    			sessionsInfo.add(session);
    		}
    		contextMap.put("sessions", sessionsInfo);
    		return contextMap;
    	}
    	
    	
    	 public static Map<String,Object> getData(){
    	    	MBeanServer mBeanServer = Registry.getRegistry(null,null).getMBeanServer();
    	    	String onStr = "*:type=ThreadPool,*";
    	    	Map<String,Object> map = new HashMap<String,Object>();
    	    	try{
    	    		ObjectName objectName = new ObjectName(onStr);
    	    		Set set = mBeanServer.queryMBeans(objectName, null);
    	    		Vector<ObjectName> threadPool = new Vector<ObjectName>();  		
    	        	Iterator iterator = set.iterator();
    	        	while(iterator.hasNext()){
    	        		ObjectInstance oi = (ObjectInstance) iterator.next();
    	        	    threadPool.addElement(oi.getObjectName());
    	        	}
    	        	Vector<ObjectName> globalRequestProcessors = new Vector<ObjectName>();
    	        	onStr = "*:type=GlobalRequestProcessor,*";
    	        	objectName = new ObjectName(onStr);
    	        	set.clear();
    	        	set = mBeanServer.queryMBeans(objectName, null);
    	        	iterator = set.iterator();
    	        	while(iterator.hasNext()){
    	        		ObjectInstance oi = (ObjectInstance) iterator.next();
    	        		globalRequestProcessors.addElement(oi.getObjectName());
    	        	}
    	        	Enumeration<ObjectName> enumeration = threadPool.elements();
    	        	while(enumeration.hasMoreElements()){
    	        		ObjectName objectName1 = enumeration.nextElement();
    	        		map.put("maxThread", mBeanServer.getAttribute(objectName1, "maxThreads"));
    	        		map.put("currentThreadCount", mBeanServer.getAttribute(objectName1, "currentThreadCount"));
    	        		map.put("connectionCount", mBeanServer.getAttribute(objectName1, "connectionCount"));
    	        		map.put("maxConnections", mBeanServer.getAttribute(objectName1, "maxConnections"));
    	        	}
    	        	
    	        	Enumeration<ObjectName> reqEnume  = globalRequestProcessors.elements();
    	        	while(reqEnume.hasMoreElements()){
    	        		ObjectName reqObjectName = reqEnume.nextElement();
    	        		map.put("processingTime", mBeanServer.getAttribute(reqObjectName, "processingTime"));
    	        		map.put("requestCount", mBeanServer.getAttribute(reqObjectName, "requestCount"));
    	        		map.put("errorCount", mBeanServer.getAttribute(reqObjectName, "errorCount"));
    	        	}
    	        	
    	        	map.put("maxMemory", formatSize(Long.valueOf(Runtime.getRuntime().maxMemory()), true));
    	        	SortedMap<String, MemoryPoolMXBean> memoryPoolMBeans = new TreeMap<String, MemoryPoolMXBean>();
    	    		for (MemoryPoolMXBean mbean : ManagementFactory.getMemoryPoolMXBeans()) {
    	    			String sortKey = mbean.getType() + ":" + mbean.getName();
    	    			memoryPoolMBeans.put(sortKey, mbean);
    	    		}
    	    		Long usedMemory = 0l;
    	    		for (MemoryPoolMXBean memoryPoolMBean : memoryPoolMBeans.values()) {
    	    			MemoryUsage usage = memoryPoolMBean.getUsage();
    	    			usedMemory = usedMemory + Long.valueOf(usage.getUsed());
    	    		}
    	    		map.put("usedMemory", formatSize(usedMemory, true));
    	    		/*long connectionCount = (Long) mBeanServer.getAttribute(objectNameData, "connectionCount");
    				int maxConnections = (int) mBeanServer.getAttribute(objectNameData, "maxConnections");*/
    	    	}catch(Exception e){
    	    		e.printStackTrace();
    	    	}
    			return map;
    	    
    	    }
    	    
    	    public static long formatSize(Object obj, boolean mb) {
    
    			long bytes = -1L;
    
    			if (obj instanceof Long) {
    				bytes = ((Long) obj).longValue();
    			} else if (obj instanceof Integer) {
    				bytes = ((Integer) obj).intValue();
    			}
    
    			if (mb) {
    				StringBuilder buff = new StringBuilder();
    				if (bytes < 0) {
    					buff.append('-');
    					bytes = -bytes;
    				}
    				long mbytes = bytes / (1024 * 1024);
    				long rest = ((bytes - (mbytes * (1024 * 1024))) * 100) / (1024 * 1024);
    				buff.append(mbytes).append('.');
    				if (rest < 10) {
    					buff.append('0');
    				}
    				buff.append(rest);
    				double d = Double.parseDouble(buff.toString());
    				Long l = (long) d;
    				return l;
    			} else {
    				return (bytes / 1024);
    			}
    
    		}
    	    
    	    public static String formatTime(Object obj) {
    
    	        long time = -1L;
    
    	        if (obj instanceof Long) {
    	            time = ((Long) obj).longValue();
    	        } else if (obj instanceof Integer) {
    	            time = ((Integer) obj).intValue();
    	        }
    
    	        if (time > 1000 *1000) {
    	            return ((((float) time ) / 1000) + " s");
    	        } else if(time > 1000) {
    	            return (time + " ms");
    	        }else {
    	        	 return ((((float) time ) / 1000) + " ms");
    			}
    	    }
    	    public static String formatTime(Object obj, boolean seconds) {
    
    	        long time = -1L;
    
    	        if (obj instanceof Long) {
    	            time = ((Long) obj).longValue();
    	        } else if (obj instanceof Integer) {
    	            time = ((Integer) obj).intValue();
    	        }
    
    	        if (seconds) {
    	            return ((((float) time ) / 1000) + " s");
    	        } else {
    	            return (time + " ms");
    	        }
    	    }
    
    	    @Override
    	    public void handleNotification(Notification notification,
    	                                   java.lang.Object handback) {
    
    	        if (notification instanceof MBeanServerNotification) {
    	            ObjectName objectName =
    	                ((MBeanServerNotification) notification).getMBeanName();
    	            if (notification.getType().equals
    	                (MBeanServerNotification.REGISTRATION_NOTIFICATION)) {
    	                String type = objectName.getKeyProperty("type");
    	                if (type != null) {
    	                    if (type.equals("ProtocolHandler")) {
    	                        protocolHandlers.addElement(objectName);
    	                    } else if (type.equals("ThreadPool")) {
    	                        threadPools.addElement(objectName);
    	                    } else if (type.equals("GlobalRequestProcessor")) {
    	                        globalRequestProcessors.addElement(objectName);
    	                    } else if (type.equals("RequestProcessor")) {
    	                        requestProcessors.addElement(objectName);
    	                    }
    	                }
    	            } else if (notification.getType().equals
    	                       (MBeanServerNotification.UNREGISTRATION_NOTIFICATION)) {
    	                String type = objectName.getKeyProperty("type");
    	                if (type != null) {
    	                    if (type.equals("ProtocolHandler")) {
    	                        protocolHandlers.removeElement(objectName);
    	                    } else if (type.equals("ThreadPool")) {
    	                        threadPools.removeElement(objectName);
    	                    } else if (type.equals("GlobalRequestProcessor")) {
    	                        globalRequestProcessors.removeElement(objectName);
    	                    } else if (type.equals("RequestProcessor")) {
    	                        requestProcessors.removeElement(objectName);
    	                    }
    	                }
    	                String j2eeType = objectName.getKeyProperty("j2eeType");
    	                if (j2eeType != null) {
    
    	                }
    	            }
    	        }
    
    	    }
    	    
    	
    }

3、获取的结果数据如下：

{
    	"jvm": {
    		"total_memory": 48758784,
    		"memory_pool": [{
    			"usageMax": 11010048,
    			"name": "PS Eden Space",
    			"usageUsed": 6111136,
    			"type": "HEAP",
    			"usageCommitted": 10485760,
    			"usageInit": 13107200
    		}, {
    			"usageMax": 35127296,
    			"name": "PS Old Gen",
    			"usageUsed": 19668376,
    			"type": "HEAP",
    			"usageCommitted": 35127296,
    			"usageInit": 35127296
    		}, {
    			"usageMax": 3145728,
    			"name": "PS Survivor Space",
    			"usageUsed": 1950184,
    			"type": "HEAP",
    			"usageCommitted": 3145728,
    			"usageInit": 2097152
    		}, {
    			"usageMax": 104857600,
    			"name": "Code Cache",
    			"usageUsed": 11987072,
    			"type": "NON_HEAP",
    			"usageCommitted": 12255232,
    			"usageInit": 2555904
    		}, {
    			"usageMax": 1073741824,
    			"name": "Compressed Class Space",
    			"usageUsed": 3185400,
    			"type": "NON_HEAP",
    			"usageCommitted": 3538944,
    			"usageInit": 0
    		}, {
    			"usageMax": -1,
    			"name": "Metaspace",
    			"usageUsed": 31663032,
    			"type": "NON_HEAP",
    			"usageCommitted": 32636928,
    			"usageInit": 0
    		}],
    		"free_memory": 21029088,
    		"max_memory": 48758784
    	},
    	"server": {
    		"hostName": "nb-hz20036325",
    		"tomcat_version": "Apache Tomcat/8.5.24",
    		"jvm_vendor": "Oracle Corporation",
    		"os_version": "6.1",
    		"os_arch": "amd64",
    		"os_name": "Windows 7",
    		"hostAddress": "10.13.80.12",
    		"jvm_version": "1.8.0_151-b12"
    	},
    	"os": {
    		" Free page file: ": 17006,
    		" Available memory: ": 4869,
    		" Physical memory": 12241,
    		" Process user time: ": "12.324 s",
    		" Total page file: ": 24481,
    		" Process kernel time: ": "7.254 s",
    		" Memory load: ": 60
    	},
    	"war": {
    		"requestCount": 112,
    		"connectionCount": 2,
    		"currentThreadCount": 10,
    		"memoryMax": 48758784,
    		"metaspaceUse": 30,
    		"contexts": [{
    			"requestCount": 0,
    			"sessions": [],
    			"sessionCount": 0,
    			"name": "/examples",
    			"state": "STARTED",
    			"errorCount": 0
    		}, {
    			"requestCount": 0,
    			"sessions": [],
    			"sessionCount": 0,
    			"name": "/host-manager",
    			"state": "STARTED",
    			"errorCount": 0
    		}, {
    			"requestCount": 48,
    			"sessions": [{
    				"inactiveIntervalTime": 1800,
    				"lastAcessTime": 1525247083747,
    				"sessionId": "11C58869BBF32D217EFF3F8B725982E6",
    				"idleTIme": 612935
    			}],
    			"sessionCount": 1,
    			"name": "/manager",
    			"state": "STARTED",
    			"errorCount": 1
    		}, {
    			"requestCount": 9,
    			"sessions": [],
    			"sessionCount": 0,
    			"name": "/docs",
    			"state": "STARTED",
    			"errorCount": 0
    		}, {
    			"requestCount": 2,
    			"sessions": [],
    			"sessionCount": 0,
    			"name": "/war_mointor",
    			"state": "STARTED",
    			"errorCount": 0
    		}],
    		"maxThreads": 200,
    		"errorCount": 4,
    		"memoryUse": 27729696,
    		"uptime": 11892453,
    		"metaspaceMax": 0,
    		"maxConnections": 10000
    	}
    }

代码地址 [Github][]

[Tomcat_--war]: https://blog.csdn.net/qq924862077/article/details/80159867
[Github]: https://github.com/IAMTJW/TJW-Tomcat