目录
- 示例代码
- 完整的示例代码文件
示例代码
String jmxURL = \”service:jmx:rmi:///jndi/rmi://192.168.10.93:8999/jmxrmi\”;
JMXServiceURL serviceURL = new JMXServiceURL(jmxURL);
Map map = new HashMap();
// 用户名密码，在jmxremote.password文件中查看
String[] credentials = new String[] { \”monitorRole\”, \”tomcat\” };
map.put(\”jmx.remote.credentials\”, credentials);
JMXConnector connector = JMXConnectorFactory.connect(serviceURL, map);
MBeanServerConnection mbsc = connector.getMBeanServerConnection();
// 端口最好是动态取得
ObjectName threadObjName = new ObjectName(\”Catalina:type=ThreadPool,name=http-8080\”);
MBeanInfo mbInfo = mbsc.getMBeanInfo(threadObjName);
// tomcat的线程数对应的属性值
String attrName = \”currentThreadCount\”;
MBeanAttributeInfo[] mbAttributes = mbInfo.getAttributes();
System.out.println(\”currentThreadCount:\” + mbsc.getAttribute(threadObjName, attrName));
完整的示例代码文件
import java.lang.management.MemoryUsage;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Formatter;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import java.util.Set;
import javax.management.MBeanAttributeInfo;
import javax.management.MBeanInfo;
import javax.management.MBeanServerConnection;
import javax.management.ObjectInstance;
import javax.management.ObjectName;
import javax.management.openmbean.CompositeDataSupport;
import javax.management.remote.JMXConnector;
import javax.management.remote.JMXConnectorFactory;
import javax.management.remote.JMXServiceURL;
/**
* @author liuyazhuang
* @date 2016-05-31
*/
public class JMXTest {
/**
* main方法
* @param args
*/
public static void main(String[] args) {
try {
String jmxURL = \”service:jmx:rmi:///jndi/rmi://127.0.0.1:8999/jmxrmi\”;
JMXServiceURL serviceURL = new JMXServiceURL(jmxURL);
Map map = new HashMap();
String[] credentials = new String[] { \”monitorRole\”, \”tomcat\” };
map.put(\”jmx.remote.credentials\”, credentials);
JMXConnector connector = JMXConnectorFactory.connect(serviceURL,
map);
MBeanServerConnection mbsc = connector.getMBeanServerConnection();
// 端口最好是动态取得
ObjectName threadObjName = new ObjectName(
\”Catalina:type=ThreadPool,name=http-8080\”);
MBeanInfo mbInfo = mbsc.getMBeanInfo(threadObjName);
String attrName = \”currentThreadCount\”;// tomcat的线程数对应的属性值
MBeanAttributeInfo[] mbAttributes = mbInfo.getAttributes();
System.out.println(\”currentThreadCount:\”
+ mbsc.getAttribute(threadObjName, attrName));
// heap
for (int j = 0; j < mbsc.getDomains().length; j++) {
System.out.println(\”###########\” + mbsc.getDomains()[j]);
}
Set MBeanset = mbsc.queryMBeans(null, null);
System.out.println(\”MBeanset.size() : \” + MBeanset.size());
Iterator 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 (canonicalName
.equals(\”Catalina:host=localhost,type=Cluster\”)) {
// Get details of cluster MBeans
System.out.println(\”Cluster MBeans Details:\”);
System.out
.println(\”=========================================\”);
// getMBeansDetails(canonicalName);
String canonicalKeyPropList = objectName
.getCanonicalKeyPropertyListString();
}
}
// ————————- system ———————-
ObjectName runtimeObjName = new ObjectName(\”java.lang:type=Runtime\”);
System.out.println(\”厂商:\”
+ (String) mbsc.getAttribute(runtimeObjName, \”VmVendor\”));
System.out.println(\”程序:\”
+ (String) mbsc.getAttribute(runtimeObjName, \”VmName\”));
System.out.println(\”版本:\”
+ (String) mbsc.getAttribute(runtimeObjName, \”VmVersion\”));
Date starttime = new Date((Long) mbsc.getAttribute(runtimeObjName,
\”StartTime\”));
SimpleDateFormat df = new SimpleDateFormat(\”yyyy-MM-dd HH:mm:ss\”);
System.out.println(\”启动时间:\” + df.format(starttime));
Long timespan = (Long) mbsc.getAttribute(runtimeObjName, \”Uptime\”);
System.out.println(\”连续工作时间:\” + JMXTest.formatTimeSpan(timespan));
// ———————— JVM ————————-
// 堆使用率
ObjectName heapObjName = new ObjectName(\”java.lang:type=Memory\”);
MemoryUsage heapMemoryUsage = MemoryUsage
.from((CompositeDataSupport) mbsc.getAttribute(heapObjName,
\”HeapMemoryUsage\”));
long maxMemory = heapMemoryUsage.getMax();// 堆最大
long commitMemory = heapMemoryUsage.getCommitted();// 堆当前分配
long usedMemory = heapMemoryUsage.getUsed();
System.out.println(\”heap:\” + (double) usedMemory * 100
/ commitMemory + \”%\”);// 堆使用率
MemoryUsage nonheapMemoryUsage = MemoryUsage
.from((CompositeDataSupport) mbsc.getAttribute(heapObjName,
\”NonHeapMemoryUsage\”));
long noncommitMemory = nonheapMemoryUsage.getCommitted();
long nonusedMemory = heapMemoryUsage.getUsed();
System.out.println(\”nonheap:\” + (double) nonusedMemory * 100
/ noncommitMemory + \”%\”);
ObjectName permObjName = new ObjectName(
\”java.lang:type=MemoryPool,name=Perm Gen\”);
MemoryUsage permGenUsage = MemoryUsage
.from((CompositeDataSupport) mbsc.getAttribute(permObjName,
\”Usage\”));
long committed = permGenUsage.getCommitted();// 持久堆大小
long used = heapMemoryUsage.getUsed();//
System.out.println(\”perm gen:\” + (double) used * 100 / committed
+ \”%\”);// 持久堆使用率
// ——————– Session —————
ObjectName managerObjName = new ObjectName(
\”Catalina:type=Manager,*\”);
Set<ObjectName> s = mbsc.queryNames(managerObjName, null);
for (ObjectName obj : s) {
System.out.println(\”应用名:\” + obj.getKeyProperty(\”path\”));
ObjectName objname = new ObjectName(obj.getCanonicalName());
System.out.println(\”最大会话数:\”
+ mbsc.getAttribute(objname, \”maxActiveSessions\”));
System.out.println(\”会话数:\”
+ mbsc.getAttribute(objname, \”activeSessions\”));
System.out.println(\”活动会话数:\”
+ mbsc.getAttribute(objname, \”sessionCounter\”));
}
// —————– Thread Pool —————-
ObjectName threadpoolObjName = new ObjectName(
\”Catalina:type=ThreadPool,*\”);
Set<ObjectName> s2 = mbsc.queryNames(threadpoolObjName, null);
for (ObjectName obj : s2) {
System.out.println(\”端口名:\” + obj.getKeyProperty(\”name\”));
ObjectName objname = new ObjectName(obj.getCanonicalName());
System.out.println(\”最大线程数:\”
+ mbsc.getAttribute(objname, \”maxThreads\”));
System.out.println(\”当前线程数:\”
+ mbsc.getAttribute(objname, \”currentThreadCount\”));
System.out.println(\”繁忙线程数:\”
+ mbsc.getAttribute(objname, \”currentThreadsBusy\”));
}
} catch (Exception e) {
e.printStackTrace();
}
}
public static String formatTimeSpan(long span) {
long minseconds = span % 1000;
span = span / 1000;
long seconds = span % 60;
span = span / 60;
long mins = span % 60;
span = span / 60;
long hours = span % 24;
span = span / 24;
long days = span;
return (new Formatter()).format(\”%1$d天 %2$02d:%3$02d:%4$02d.%5$03d\”,
days, hours, mins, seconds, minseconds).toString();
}
}
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