怎么在Java中使用JMX監(jiān)控Zookeeper的狀態(tài)

怎么在Java中使用JMX監(jiān)控Zookeeper的狀態(tài)？針對(duì)這個(gè)問題，這篇文章詳細(xì)介紹了相對(duì)應(yīng)的分析和解答，希望可以幫助更多想解決這個(gè)問題的小伙伴找到更簡單易行的方法。

通過靜態(tài)工廠方法獲取MXBean實(shí)例，從本地訪問正在運(yùn)行的虛擬機(jī)的MXBean接口。這些Bean我們從ManagementFactory類中定義的靜態(tài)方法獲??；如ManagementFactory.getOperatingSystemMXBean();其中不足就是只能獲取本地的JVM狀態(tài)。無法獲取遠(yuǎn)程的虛擬機(jī)數(shù)據(jù)。

• ClassLoadingMXBean Java虛擬機(jī)的類加載系統(tǒng)

• CompilationMXBean Java虛擬機(jī)的編譯系統(tǒng)

• MemoryMXBean Java虛擬機(jī)的內(nèi)存系統(tǒng)

• RuntimeMXBean Java虛擬機(jī)的運(yùn)行時(shí)系統(tǒng)

• OperatingSystemMXBean Java虛擬機(jī)在其上運(yùn)行的操作系統(tǒng)

• GarbageCollectorMXBean Java虛擬機(jī)中的垃圾回收器

• MemoryManagerMXBean Java虛擬機(jī)中的內(nèi)存管理器

• MemoryPoolMXBean Java虛擬機(jī)中的內(nèi)存池

三、Zookeeper提供出來的Mbeans

構(gòu)造MXBean代理實(shí)例，通過代理將方法調(diào)用轉(zhuǎn)發(fā)到給定的MBeanServe。JConsole能夠監(jiān)控的項(xiàng)目，通過API都能獲取到。

具體代碼如下：

import java.io.IOException;
import java.lang.management.ClassLoadingMXBean;
import java.lang.management.CompilationMXBean;
import java.lang.management.ManagementFactory;
import java.lang.management.OperatingSystemMXBean;
import java.lang.management.ThreadMXBean;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Set;
import javax.management.InstanceNotFoundException;
import javax.management.IntrospectionException;
import javax.management.JMX;
import javax.management.MBeanServerConnection;
import javax.management.MalformedObjectNameException;
import javax.management.ObjectName;
import javax.management.ReflectionException;
import javax.management.remote.JMXConnector;
import javax.management.remote.JMXConnectorFactory;
import javax.management.remote.JMXServiceURL;
import org.apache.zookeeper.server.ConnectionMXBean;
import org.apache.zookeeper.server.DataTreeMXBean;
import org.apache.zookeeper.server.ZooKeeperServerMXBean;
public class ZkJMXTest {
  static JMXConnector connector;
  /**
   * @param args
   * @throws IOException
   * @throws MalformedObjectNameException
   * @throws InstanceNotFoundException
   * @throws ReflectionException
   * @throws IntrospectionException
   */
  public static void main(String[] args) throws IOException, MalformedObjectNameException,
    InstanceNotFoundException, IntrospectionException, ReflectionException {
    OperatingSystemMXBean osbean = ManagementFactory.getOperatingSystemMXBean();
    System.out.println("體系結(jié)構(gòu):" + osbean.getArch());//操作系統(tǒng)體系結(jié)構(gòu)
    System.out.println("處理器核數(shù):" + osbean.getAvailableProcessors());///核數(shù)
    System.out.println("名字:" + osbean.getName());//名字
    System.out.println(osbean.getVersion());//操作系統(tǒng)版本
    ThreadMXBean threadBean=ManagementFactory.getThreadMXBean();
    System.out.println("活動(dòng)線程:" + threadBean.getThreadCount());//總線程數(shù)
    ClassLoadingMXBean classLoadingMXBean = ManagementFactory.getClassLoadingMXBean();
    CompilationMXBean compilationMXBean = ManagementFactory.getCompilationMXBean();
    System.out.println("===========");
    // 通過 MBeanServer間接地訪問 MXBean 接口
    MBeanServerConnection mbsc = createMBeanServer("192.168.1.100", "9991", "controlRole", "123456");
    // 操作系統(tǒng)
    ObjectName os = new ObjectName("java.lang:type=OperatingSystem");
    System.out.println("體系結(jié)構(gòu):" + getAttribute(mbsc, os, "Arch"));//體系結(jié)構(gòu)
    System.out.println("處理器核數(shù):" + getAttribute(mbsc, os, "AvailableProcessors"));//核數(shù)
    System.out.println("總物理內(nèi)存:" + getAttribute(mbsc, os, "TotalPhysicalMemorySize"));//總物理內(nèi)存
    System.out.println("空閑物理內(nèi)存:" + getAttribute(mbsc, os, "FreePhysicalMemorySize"));//空閑物理內(nèi)存
    System.out.println("總交換空間:" + getAttribute(mbsc, os, "TotalSwapSpaceSize"));//總交換空間
    System.out.println("空閑交換空間:" + getAttribute(mbsc, os, "FreeSwapSpaceSize"));//空閑交換空間
    System.out.println("操作系統(tǒng):" + getAttribute(mbsc, os, "Name")+ getAttribute(mbsc, os, "Version"));//操作系統(tǒng)
    System.out.println("提交的虛擬內(nèi)存:" + getAttribute(mbsc, os, "CommittedVirtualMemorySize"));//提交的虛擬內(nèi)存
    System.out.println("系統(tǒng)cpu使用率:" + getAttribute(mbsc, os, "SystemCpuLoad"));//系統(tǒng)cpu使用率
    System.out.println("進(jìn)程cpu使用率:" + getAttribute(mbsc, os, "ProcessCpuLoad"));//進(jìn)程cpu使用率
    System.out.println("============");//
    // 線程
    ObjectName Threading = new ObjectName("java.lang:type=Threading");
    System.out.println("活動(dòng)線程:" + getAttribute(mbsc, Threading, "ThreadCount"));// 活動(dòng)線程
    System.out.println("守護(hù)程序線程:" + getAttribute(mbsc, Threading, "DaemonThreadCount"));// 守護(hù)程序線程
    System.out.println("峰值:" + getAttribute(mbsc, Threading, "PeakThreadCount"));// 峰值
    System.out.println("啟動(dòng)的線程總數(shù):" + getAttribute(mbsc, Threading, "TotalStartedThreadCount"));// 啟動(dòng)的線程總數(shù)
    ThreadMXBean threadBean2 = ManagementFactory.newPlatformMXBeanProxy
        (mbsc, ManagementFactory.THREAD_MXBEAN_NAME, ThreadMXBean.class);
    System.out.println("活動(dòng)線程:" + threadBean2.getThreadCount());// 活動(dòng)線程
    ThreadMXBean threadBean3 = ManagementFactory.getThreadMXBean();
    System.out.println("本地活動(dòng)線程:" + threadBean3.getThreadCount());// 本地活動(dòng)線程
    System.out.println("============");//
    ObjectName Compilation = new ObjectName("java.lang:type=Compilation");
    System.out.println("總編譯時(shí)間 毫秒:" + getAttribute(mbsc, Compilation, "TotalCompilationTime"));// 總編譯時(shí)間 毫秒
    System.out.println("============");//
    ObjectName ClassLoading = new ObjectName("java.lang:type=ClassLoading");
    System.out.println("已加載類總數(shù):" + getAttribute(mbsc, ClassLoading, "TotalLoadedClassCount"));// 已加載類總數(shù)
    System.out.println("已加裝當(dāng)前類:" + getAttribute(mbsc, ClassLoading, "LoadedClassCount"));// 已加裝當(dāng)前類
    System.out.println("已卸載類總數(shù):" + getAttribute(mbsc, ClassLoading, "UnloadedClassCount"));// 已卸載類總數(shù)
    System.out.println("==========================================================");//
    // http://zookeeper.apache.org/doc/r3.4.6/zookeeperJMX.html
    // org.apache.ZooKeeperService:name0=ReplicatedServer_id1,name1=replica.1,name2=Follower
    ObjectName replica = new ObjectName("org.apache.ZooKeeperService:name0=ReplicatedServer_id1,name1=replica.1");
    System.out.println("replica.1運(yùn)行狀態(tài):" + getAttribute(mbsc, replica, "State"));// 運(yùn)行狀態(tài)
    mbsc = createMBeanServer("192.168.1.100", "9992", "controlRole", "123456");
    System.out.println("==============節(jié)點(diǎn)樹對(duì)象===========");
    ObjectName dataTreePattern = new ObjectName("org.apache.ZooKeeperService:name0=ReplicatedServer_id?,name1=replica.?,name2=*,name3=InMemoryDataTree");
    Set<ObjectName> dataTreeSets = mbsc.queryNames(dataTreePattern, null);
    Iterator<ObjectName> dataTreeIterator = dataTreeSets.iterator();
    // 只有一個(gè)
    while (dataTreeIterator.hasNext()) {
      ObjectName dataTreeObjectName = dataTreeIterator.next();
      DataTreeMXBean dataTree = JMX.newMBeanProxy(mbsc, dataTreeObjectName, DataTreeMXBean.class);
      System.out.println("節(jié)點(diǎn)總數(shù):" + dataTree.getNodeCount());// 節(jié)點(diǎn)總數(shù)
      System.out.println("Watch總數(shù):" + dataTree.getWatchCount());// Watch總數(shù)
      System.out.println("臨時(shí)節(jié)點(diǎn)總數(shù):" + dataTree.countEphemerals());// Watch總數(shù)
      System.out.println("節(jié)點(diǎn)名及字符總數(shù):" + dataTree.approximateDataSize());// 節(jié)點(diǎn)全路徑和值的總字符數(shù)
      Map<String, String> dataTreeMap = dataTreeObjectName.getKeyPropertyList();
      String replicaId = dataTreeMap.get("name1").replace("replica.", "");
      String role = dataTreeMap.get("name2");// Follower,Leader,Observer,Standalone
      String canonicalName = dataTreeObjectName.getCanonicalName();
      int roleEndIndex = canonicalName.indexOf(",name3");
      ObjectName roleObjectName = new ObjectName(canonicalName.substring(0, roleEndIndex));
      System.out.println("==============zk服務(wù)狀態(tài)===========");
      ZooKeeperServerMXBean ZooKeeperServer = JMX.newMBeanProxy(mbsc, roleObjectName, ZooKeeperServerMXBean.class);
      System.out.println(role + " 的IP和端口:" + ZooKeeperServer.getClientPort());// IP和端口
      System.out.println(role + " 活著的連接數(shù):" + ZooKeeperServer.getNumAliveConnections());// 連接數(shù)
      System.out.println(role + " 未完成請(qǐng)求數(shù):" + ZooKeeperServer.getOutstandingRequests());// 未完成的請(qǐng)求數(shù)
      System.out.println(role + " 接收的包:" + ZooKeeperServer.getPacketsReceived());// 收到的包
      System.out.println(role + " 發(fā)送的包:" + ZooKeeperServer.getPacketsSent());// 發(fā)送的包
      System.out.println(role + " 平均延遲（毫秒）:" + ZooKeeperServer.getAvgRequestLatency());
      System.out.println(role + " 最大延遲（毫秒）:" + ZooKeeperServer.getMaxRequestLatency());
      System.out.println(role + " 每個(gè)客戶端IP允許的最大連接數(shù):" + ZooKeeperServer.getMaxClientCnxnsPerHost());
      System.out.println(role + " 最大Session超時(shí)（毫秒）:" + ZooKeeperServer.getMaxSessionTimeout());
      System.out.println(role + " 心跳時(shí)間（毫秒）:" + ZooKeeperServer.getTickTime());
      System.out.println(role + " 版本:" + ZooKeeperServer.getVersion());// 版本
      // 三個(gè)重置操作
//      ZooKeeperServer.resetLatency(); //重置min/avg/max latency statistics
//      ZooKeeperServer.resetMaxLatency(); //重置最大延遲統(tǒng)計(jì)
//      ZooKeeperServer.resetStatistics(); // 重置包和延遲所有統(tǒng)計(jì)
      System.out.println("==============所有客戶端的連接信息===========");
      ObjectName connectionPattern = new ObjectName("org.apache.ZooKeeperService:name0=ReplicatedServer_id?,name1=replica.?,name2=*,name3=Connections,*");
      Set<ObjectName> connectionSets = mbsc.queryNames(connectionPattern, null);
      List<ObjectName> connectionList = new ArrayList<ObjectName>(connectionSets.size());
      connectionList.addAll(connectionSets);
      Collections.sort(connectionList);
      for (ObjectName connectionON : connectionList) {
        System.out.println("=========================");
        ConnectionMXBean connectionBean = JMX.newMBeanProxy(mbsc, connectionON, ConnectionMXBean.class);
        System.out.println(" IP+Port:" + connectionBean.getSourceIP());//
        System.out.println(" SessionId:" + connectionBean.getSessionId());//
        System.out.println(" PacketsReceived:" + connectionBean.getPacketsReceived());// 收到的包
        System.out.println(" PacketsSent:" + connectionBean.getPacketsSent());// 發(fā)送的包
        System.out.println(" MinLatency:" + connectionBean.getMinLatency());//
        System.out.println(" AvgLatency:" + connectionBean.getAvgLatency());//
        System.out.println(" MaxLatency:" + connectionBean.getMaxLatency());//
        System.out.println(" StartedTime:" + connectionBean.getStartedTime());//
        System.out.println(" EphemeralNodes:" + connectionBean.getEphemeralNodes().length);//
        System.out.println(" EphemeralNodes:" + Arrays.asList(connectionBean.getEphemeralNodes()));//
        System.out.println(" OutstandingRequests:" + connectionBean.getOutstandingRequests());//
        //connectionBean.resetCounters();
        //connectionBean.terminateConnection();
        //connectionBean.terminateSession();
      }
    }
    // close connection
    if (connector != null) {
      connector.close();
    }
  }
  /**
   * 建立連接
   * @param ip
   * @param jmxport
   * @return
   */
  public static MBeanServerConnection createMBeanServer(String ip,
      String jmxport, String userName, String password) {
    try {
      String jmxURL = "service:jmx:rmi:///jndi/rmi://" + ip + ":"
          + jmxport + "/jmxrmi";
      // jmxurl
      JMXServiceURL serviceURL = new JMXServiceURL(jmxURL);
      Map<String, String[]> map = new HashMap<String, String[]>();
      String[] credentials = new String[] { userName, password };
      map.put("jmx.remote.credentials", credentials);
      connector = JMXConnectorFactory.connect(serviceURL, map);
      MBeanServerConnection mbsc = connector.getMBeanServerConnection();
      return mbsc;
    } catch (IOException ioe) {
      ioe.printStackTrace();
      System.err.println(ip + ":" + jmxport + " 連接建立失敗");
    }
    return null;
  }
  /**
   * 使用MBeanServer獲取對(duì)象名為[objName]的MBean的[objAttr]屬性值
   * <p>
   * 靜態(tài)代碼: return MBeanServer.getAttribute(ObjectName name, String attribute)
   * @param mbeanServer
   *      - MBeanServer實(shí)例
   * @param objName
   *      - MBean的對(duì)象名
   * @param objAttr
   *      - MBean的某個(gè)屬性名
   * @return 屬性值
   */
  private static String getAttribute(MBeanServerConnection mbeanServer,
      ObjectName objName, String objAttr) {
    if (mbeanServer == null || objName == null || objAttr == null)
      throw new IllegalArgumentException();
    try {
      return String.valueOf(mbeanServer.getAttribute(objName, objAttr));
    } catch (Exception e) {
      return null;
    }
  }
}

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