这是我的博客文章“JRCMD走得更远”的更新版本。在JRockit R27版中，Mbean有了重大修改，用于公开JRockit特有的可管理功能。一个主要的不同在于，JRockit特有的功能并非默认加载到平台MBean服务器中。要进行加载，必须先创建一个特定的MBean，然后该MBean将加载用于公开该API的剩余部分。MBean也将移动到新域：“bea.jrockit.management”。

　　要加载的MBean是bea.jrockit.management:JRockitConsole MBean。只需使用MBeanServerConnection就可以完成，如下所示：

MBeanServerConnection#createMBean(
   "bea.jrockit.management.JRockitConsole", null);

　　以下示例是旧的JRCMD走得更远 的修改版本，和JRCMD一样，允许读取/执行性能计数器和ctrl-break处理程序，但是从另一台机器远程读取/执行。

import java.lang.management.ManagementFactory;
import java.net.MalformedURLException;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;

import javax.management.Attribute;
import javax.management.InstanceNotFoundException;
import javax.management.MBeanAttributeInfo;
import javax.management.MBeanServerConnection;
import javax.management.ObjectName;
import javax.management.remote.JMXConnector;
import javax.management.remote.JMXConnectorFactory;
import javax.management.remote.JMXServiceURL;

/**
 * Simple code example on how to execute ctrl-break handlers remotely.
 * 
 * Usage: RemoteJRCMD -host  -port  -user  -pass 
 * -command  []
 * 
 * All arguments are optional. If no command is specified, all performance
 * counters and their current values are listed.
 * 
 * @author Marcus Hirt
 */
public class RemoteJRCMD {
  private final static String   KEY_CREDENTIALS                = "jmx.remote.credentials";
  private final static String   JROCKIT_PERFCOUNTER_MBEAN_NAME = "bea.jrockit.management:type=PerfCounters";
  private final static String   JROCKIT_CONSOLE_MBEAN_NAME     = "bea.jrockit.management:type=JRockitConsole";
  private final static String[] SIGNATURE                      = new String[] { "java.lang.String" };

  public static void main(String[] args) throws Exception {
    HashMap commandMap = new HashMap();
    commandMap.put("-host", "localhost");
    commandMap.put("-port", "7091");
    for (int i = 0; i < args.length; i++) {
      if (args[i].startsWith("-")) {
        StringBuilder buf = new StringBuilder();
        int j = i + 1;
        while (j < args.length && !args[j].startsWith("-")) {
          buf.append(" ");
          buf.append(args[j++]);
        }
        commandMap.put(args[i], buf.toString().trim());
        i = j - 1;
      }
    }
    executeCommand((String) commandMap.get("-host"), Integer
        .parseInt(commandMap.get("-port")), commandMap.get("-user"), commandMap
        .get("-password"), commandMap.get("-command"));
  }

  public static void executeCommand(String host, int port, String user,
      String password, String command) throws Exception {
    MBeanServerConnection server = null;
    JMXConnector jmxc = null;
    Map map = null;
    if (user != null || password != null) {
      map = new HashMap();
      final String[] credentials = new String[2];
      credentials[0] = user;
      credentials[1] = password;
      map.put(KEY_CREDENTIALS, credentials);
    }
    // Use same convention as Sun. localhost:0 means "VM, monitor thyself!"
    if (host.equals("localhost") && port == 0) {
      server = ManagementFactory.getPlatformMBeanServer();
    } else {
      jmxc = JMXConnectorFactory.newJMXConnector(
          createConnectionURL(host, port), map);
      jmxc.connect();
      server = jmxc.getMBeanServerConnection();
    }

    System.out.println("Connected to " + host + ":" + port);

    try {
      server.getMBeanInfo(new ObjectName(JROCKIT_CONSOLE_MBEAN_NAME));
    } catch (InstanceNotFoundException e1) {
      server.createMBean("bea.jrockit.management.JRockitConsole", null);
    }

    if (command == null) {
      ObjectName perfCounterObjectName = new ObjectName(
          JROCKIT_PERFCOUNTER_MBEAN_NAME);
      System.out.println("Listing all counters...");
      MBeanAttributeInfo[] attributes = server.getMBeanInfo(
          perfCounterObjectName).getAttributes();
      System.out.println("Counter\tValue\n=======\t====");

      String[] attributeNames = new String[attributes.length];
      for (int i = 0; i < attributes.length; i++) {
        attributeNames[i] = attributes[i].getName();
      }
      Iterator valueIter = server.getAttributes(perfCounterObjectName,
          attributeNames).iterator();
      while (valueIter.hasNext()) {
        Attribute attr = (Attribute) valueIter.next();
        System.out.println(attr.getName() + "\t=\t" + attr.getValue());
      }
    } else {
      System.out
          .println("Invoking the ctrl-break command '" + command + "'...");
      ObjectName consoleObjectName = new ObjectName(JROCKIT_CONSOLE_MBEAN_NAME);
      Object[] params = new Object[1];
      params[0] = command;
      System.out.println("The CtrlBreakCommand returned: \n"
          + server.invoke(consoleObjectName, "runCtrlBreakHandlerWithResult",
              params, SIGNATURE));
    }

    if (jmxc != null) {
      jmxc.close();
    }
  }

  private static JMXServiceURL createConnectionURL(String host, int port)
      throws MalformedURLException {
    return new JMXServiceURL("rmi", "", 0, "/jndi/rmi://" + host + ":" + port
        + "/jmxrmi");
  }
}

　　以下示例将对localhost上的默认端口（7091）列出所有性能计数器及其值：

　　java RemoteJRCMD

　　以下示例将对运行在主机bitsy、端口7099的JRockit启动一个60秒的JRA记录，并根据名为nisse.zip的文件编写结果记录：

java  RemoteJRCMD -command jrarecordingfilename=nisse time=60 -host bitsy -port 7091

　　和往常一样，不要忘记对您希望监控的JRockit启用JMX管理代理。可以使用 –Xmanagement选项启用管理代理，如下所示：

-Xmanagement:port=7091,ssl=false,authenticate=false

原文出处：http://dev2dev.bea.com/blog/hirt/archive/2007/03/jrcmd_goes_remo_1.html