JMX连接Tomcat (

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Tomcat 配置管理 SUN XP UP

JMX连接Tomcat (2011-01-02 22:08:59)

转载

分类： Java学习

OS：xp

jdk：1.6

Tomcat：6.0.29

1.Java的环境变量配置正确，网上很多，不再说了

2.修改Tomcat目录下的bin\catalina.bat

在该文件中查找set JAVA_OPTS=%JAVA_OPTS%，下面有一行为：

rem ----- Execute The Requested Command ---------------------------------------

在这一行的下面加

set JAVA_OPTS=-Dcom.sun.management.jmxremote -Dcom.sun.management.jmxremote.port=9008 -Dcom.sun.management.jmxremote.authenticate=false -Dcom.sun.management.jmxremote.ssl=false

说明：9008为端口号，一会儿要用到。很多地方说tomcat需要权限验证，可是我这里没有用到，就可以连接成功，所以没有测试密码文件，仅将Dcom.sun.management.jmxremote.authenticate的值设为false。

3.记得编辑完bin\catalina.bat后，一定要双击执行。直接双击就可以，不要在cmd中执行，我执行出错（不知道为什么）

4.双击bin\startup.bat，最好双击执行，我在cmd中执行，无法启动Tomcat

5.在cmd中执行netstat -an，可查看到9008端口已经启用，说明Tomcat的Jmx配置成功

6.在cmd中敲入：jconsole（这个exe令在C:\Program Files\Java\jdk1.6.0_23\bin，即安装目录的bin下），即可启动jconsole的管理界面，在界面中输入如下内容：

service:jmx:rmi:///jndi/rmi://localhost:9008/jmxrmi

或者

localhost:9008

即可进入管理界面，在管理界面的Tab页MBeans中，可以看到所有的MBeans

此时，Jmx监控Tomcat配置成功！

下面在代码中使用Jmx获取Tomcat中MBean的值

import java.util.*;
import javax.management.*;
import javax.management.remote.*;;

public class JmxTest {

public static void main(String[] args) {
// TODO Auto-generated method stub
try
{

--这里的url是在上图中输入的url
JMXServiceURL url=new JMXServiceURL ("service:jmx:rmi:///jndi/rmi://localhost:9008/jmxrmi");
//Map<String, String[]> map = new HashMap();　
//String[] credentials=new String[] {"monitorRole","QED"};　
//map.put("jmx.remote.credentials",credentials);

JMXConnector conn=JMXConnectorFactory.connect(url);
System.out.println("JMXConnector="+conn.toString());
String id=conn.getConnectionId();
System.out.println("Connection Id=" + id);

MBeanServerConnection mbsc = conn.getMBeanServerConnection();
String domains[]=mbsc.getDomains();
System.out.println("# of domains="+domains.length);
for (int i = 0; i < domains.length; i++)
{
System.out.println("Domain[" + i + "]=" + domains[i]);
}

Set<ObjectInstance> MBeanset = mbsc.queryMBeans(null, null);
System.out.println("MBeanset.size() : " + MBeanset.size());
Iterator<ObjectInstance> MBeansetIterator = MBeanset.iterator();
while (MBeansetIterator.hasNext())
{
ObjectInstance objectInstance = (ObjectInstance)MBeansetIterator.next();
ObjectName objectName= objectInstance.getObjectName();
String canonicalName= objectName.getCanonicalName();

System.out.println("canonicalName : " + canonicalName);

--在上图中，有Catalina:type=Server的port的值8005，运行程序后，在控制台能看到获取成功
if (objectName.toString().equals("Catalina:type=Server"))
{
// Get details of cluster MBeans
String s = mbsc.getAttribute(objectName, "port").toString();
System.out.println("=========================================");
System.out.println(s);
System.out.println("=========================================");
}
//String canonicalKeyPropList=objectName.getCanonicalKeyPropertyListString();
}
conn.close();
}
catch(Exception ex)
{
System.out.println("Illegal Argument Exception: " + ex);
}
}

}

下面是经过整理的代码，里面有一部分垃圾代码，大家可以选择性的看。

import java.math.BigDecimal;
import java.util.*;
import javax.management.*;
import javax.management.remote.*;
import javax.naming.Context;

public class JmxTest {

public static void main(String[] args) {
JMXConnector conn = null;
try
{
MBeanServerConnection mbsc = ConnJmx(conn);

String KeyName = "";
String objectName = "";
String attributeName = "";
String attributeKey = "";
String value = "";

objectName = "java.lang:type=Memory";
attributeName = "NonHeapMemoryUsage";
attributeKey = "init";
value = GetValueByKey(objectName, attributeName, attributeKey);
PrintContext(attributeName,value);

KeyName = "进程数";
objectName = "java.lang:type=Threading";
attributeName = "ThreadCount";
attributeKey = "";
value = GetValueByKey(mbsc, objectName, attributeName, attributeKey);
PrintContext(attributeName,value);

KeyName = "正常运行时间";
objectName = "java.lang:type=Runtime";
attributeName = "Uptime";
attributeKey = "";
value = GetValueByKey(mbsc, objectName, attributeName, attributeKey);
//System.out.println(attributeName + "=" + value);
//value = ConvertMillToText(Long.parseLong(value));
PrintContext(attributeName,value);
}
catch(Exception ex)
{
System.out.println("Exception: " + ex);
}
finally
{
try
{
if (conn != null)
{
conn.close();
}
}
catch(Exception ex1){}
}
}

private static void PrintContext(String key, String value)
{
System.out.println(key + "=" + value);
}

//从毫秒转至小时分钟
private static String ConvertMillToText(long millsecond)throws Exception
{
try
{
String s = "";
double d = (double)millsecond / (double)(1000*60*60);
BigDecimal b = new BigDecimal(d);
int hour = (int)Math.floor(d);
double minute = b.setScale(2, BigDecimal.ROUND_HALF_UP).doubleValue();
if (hour > 0)
{
s = hour + " 小时 ";
}
minute = (minute - hour) * 60;
b = new BigDecimal(minute);
minute = b.setScale(0, BigDecimal.ROUND_HALF_UP).doubleValue();
s += (int)minute + " 分钟";

return s;
}
catch(Exception ex)
{
System.out.println("Exception: " + ex);
throw ex;
}
}

//连接到jmx
private static MBeanServerConnection ConnJmx(JMXConnector conn)throws Exception
{
try
{
String _value = "";

JMXServiceURL url = new JMXServiceURL ("service:jmx:iiop:///jndi/corbaname::1.2@192.168.1.146:6888#jmx/rmi/RMIConnectorServer");
HashMap map = new HashMap();
String[] credentials=new String[] {"admin","admin"};
map.put("jmx.remote.credentials",credentials);

conn = JMXConnectorFactory.connect(url, map);
String id=conn.getConnectionId();

MBeanServerConnection mbsc = conn.getMBeanServerConnection();
return mbsc;
}
catch(Exception ex)
{
System.out.println("Illegal Argument Exception: " + ex);
throw ex;
}
}

//从MBeanServerConnection中取值
private static String GetValueByKey(MBeanServerConnection mbsc, String objectName, String attributeName, String attributeKey)throws Exception
{
try
{
String _value = "";

ObjectName _objectName = new ObjectName(objectName);
if (attributeKey.equals(""))
{
_value = mbsc.getAttribute(_objectName, attributeName).toString();
}
else
{
javax.management.openmbean.CompositeData data = (javax.management.openmbean.CompositeData)mbsc.getAttribute(_objectName, attributeName);
_value = data.get(attributeKey).toString();
}

return _value;
}
catch(Exception ex)
{
System.out.println("Illegal Argument Exception: " + ex);
throw ex;
}
}

private static String GetValueByKey(String objectName, String attributeName, String attributeKey)throws Exception
{
JMXConnector conn = null;
try
{
String _value = "";

JMXServiceURL url=new JMXServiceURL ("service:jmx:iiop:///jndi/corbaname::1.2@192.168.1.146:6888#jmx/rmi/RMIConnectorServer");
HashMap map = new HashMap();
String[] credentials=new String[] {"admin","admin"};
map.put("jmx.remote.credentials",credentials);

conn = JMXConnectorFactory.connect(url, map);
String id=conn.getConnectionId();

MBeanServerConnection mbsc = conn.getMBeanServerConnection();
//Set<ObjectInstance> MBeanset = mbsc.queryMBeans("java.lang:type=Memory", null);
//Set<ObjectInstance> MBeanset = mbsc.queryMBeans(null, null);
ObjectName _objectName = new ObjectName(objectName);
if (attributeKey.equals(""))
{
_value = mbsc.getAttribute(_objectName, attributeName).toString();
}
else
{
javax.management.openmbean.CompositeData data = (javax.management.openmbean.CompositeData)mbsc.getAttribute(_objectName, attributeName);
_value = data.get(attributeKey).toString();
}

return _value;
}
catch(Exception ex)
{
System.out.println("Illegal Argument Exception: " + ex);
throw ex;
}
finally
{
if (conn != null)
{
conn.close();
}
}
}

private static void TestConn()throws Exception
{
JMXConnector conn = null;
try
{
//JMXServiceURL url=new JMXServiceURL ("service:jmx:rmi:///jndi/rmi://localhost:9008/jmxrmi");
JMXServiceURL url=new JMXServiceURL ("service:jmx:iiop:///jndi/corbaname::1.2@192.168.1.146:6888#jmx/rmi/RMIConnectorServer");
HashMap map = new HashMap();
String[] credentials=new String[] {"admin","admin"};
map.put("jmx.remote.credentials",credentials);

conn = JMXConnectorFactory.connect(url, map);
System.out.println("JMXConnector="+conn.toString());
String id=conn.getConnectionId();
System.out.println("Connection Id=" + id);

MBeanServerConnection mbsc = conn.getMBeanServerConnection();
String domains[]=mbsc.getDomains();
System.out.println("# of domains="+domains.length);
for (int i = 0; i < domains.length; i++)
{
System.out.println("Domain[" + i + "]=" + domains[i]);
}

Set<ObjectInstance> MBeanset = mbsc.queryMBeans(null, null);
System.out.println("MBeanset.size() : " + MBeanset.size());
Iterator<ObjectInstance> MBeansetIterator = MBeanset.iterator();
while (MBeansetIterator.hasNext())
{
ObjectInstance objectInstance = (ObjectInstance)MBeansetIterator.next();
ObjectName objectName= objectInstance.getObjectName();
String canonicalName= objectName.getCanonicalName();

System.out.println("canonicalName : " + canonicalName);
if (objectName.toString().equals("Catalina:type=Server"))
{
// Get details of cluster MBeans
String s = mbsc.getAttribute(objectName, "port").toString();
System.out.println("=========================================");
System.out.println(s);
System.out.println("=========================================");
}
//String canonicalKeyPropList=objectName.getCanonicalKeyPropertyListString();
}
conn.close();
}
catch(Exception ex)
{
System.out.println("Illegal Argument Exception: " + ex);
throw ex;
}
finally
{
if (conn != null)
{
conn.close();
}
}
}
}