CPU and memory usage statistics in Java applicationHello therei have finished a application, now i need to get this application 's CPU and memory usage while it is executing.lots of tools i found are all presentations of the usage, showing you a graph. but i really want is get these data dynamicly, say eg: every milli-second, i want to get these data in a time series.i am new to JNI, so, is anyone had the experience with this? you got any idea i could follow, what should i do i steps??
or if you know any free jar package can finish the task i could just simply import to my project?many many thanks for your advice and help in advance.
我需要动态获取一个程序执行期间cpu及内存的利用率，很多找到的工具都只是展示利用率的数据， 我希望实现的是获取这些利用率得值，如每隔10毫秒读一次， 以组成一个时间序列。不知道谁有这方面的经验？？ 请教一下应该如何去实现？？ 或者是否知道有什么现成的jar包可以利用？？万分感谢
or if you know any free jar package can finish the task i could just simply import to my project?many many thanks for your advice and help in advance.
我需要动态获取一个程序执行期间cpu及内存的利用率，很多找到的工具都只是展示利用率的数据， 我希望实现的是获取这些利用率得值，如每隔10毫秒读一次， 以组成一个时间序列。不知道谁有这方面的经验？？ 请教一下应该如何去实现？？ 或者是否知道有什么现成的jar包可以利用？？万分感谢
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- 十进制转十六进制
java.lang.Runtime.totalMemory()-java.lang.Runtime.freeMemory()
2. 使用命令行, 捕获命令行文本去分析(如网络连接 netstat -an, 系统进程: wmic process)
3. 通过SQLServer数据库. 利用sql语法去读取这些网上都有, google一下好了
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;import javax.management.MBeanServer;
import javax.management.ObjectName;public class RuntimeInfoAccessorBean { private Log logger = LogFactory.getLog(RuntimeInfoAccessorBean.class); public RuntimeInformation getRuntimeInformation() throws Exception {
MBeanServer mBeanServer = new Registry().getMBeanServer();
RuntimeInformation ri = new RuntimeInformation(); try {
ObjectName runtimeOName = new ObjectName("java.lang:type=Runtime");
ri.setStartTime(JmxTools.getLongAttr(mBeanServer, runtimeOName, "StartTime"));
ri.setUptime(JmxTools.getLongAttr(mBeanServer, runtimeOName, "Uptime"));
ri.setVmVendor(JmxTools.getStringAttr(mBeanServer,runtimeOName,"VmVendor")); ObjectName osOName = new ObjectName("java.lang:type=OperatingSystem");
ri.setOsName(JmxTools.getStringAttr(mBeanServer, osOName, "Name"));
ri.setOsVersion(JmxTools.getStringAttr(mBeanServer, osOName, "Version")); if(!ri.getVmVendor().startsWith("IBM Corporation")){
ri.setTotalPhysicalMemorySize(JmxTools.getLongAttr(mBeanServer, osOName, "TotalPhysicalMemorySize"));
ri.setCommittedVirtualMemorySize(JmxTools.getLongAttr(mBeanServer, osOName, "CommittedVirtualMemorySize"));
ri.setFreePhysicalMemorySize(JmxTools.getLongAttr(mBeanServer, osOName, "FreePhysicalMemorySize"));
ri.setFreeSwapSpaceSize(JmxTools.getLongAttr(mBeanServer, osOName, "FreeSwapSpaceSize"));
ri.setTotalSwapSpaceSize(JmxTools.getLongAttr(mBeanServer, osOName, "TotalSwapSpaceSize"));
ri.setProcessCpuTime(JmxTools.getLongAttr(mBeanServer, osOName, "ProcessCpuTime"));
} else {
ri.setTotalPhysicalMemorySize(JmxTools.getLongAttr(mBeanServer, osOName, "TotalPhysicalMemory"));
} return ri;
} catch (Exception e) {
logger.debug("OS information is unavailable");
return null;
}
}
}//------------------------------------------------------------------------------------------
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;import javax.management.*;
import javax.management.openmbean.CompositeData;public class JmxTools { private static Log logger = LogFactory.getLog(JmxTools.class); public static Object getAttribute(MBeanServer mBeanServer, ObjectName oName, String attrName) throws Exception {
try {
return mBeanServer.getAttribute(oName, attrName);
} catch (AttributeNotFoundException e) {
logger.error(oName + " does not have \""+attrName+"\" attribute");
return null;
}
} public static long getLongAttr(MBeanServer mBeanServer, ObjectName oName, String attrName, long defaultValue) {
try {
Object o = mBeanServer.getAttribute(oName, attrName);
return o == null ? defaultValue : ((Long) o).longValue();
} catch (Exception e) {
return defaultValue;
}
} public static long getLongAttr(MBeanServer mBeanServer, ObjectName oName, String attrName) throws Exception {
return ((Long) mBeanServer.getAttribute(oName, attrName)).longValue();
} public static int getIntAttr(MBeanServer mBeanServer, ObjectName oName, String attrName) throws Exception {
return ((Integer) mBeanServer.getAttribute(oName, attrName)).intValue();
} public static String getStringAttr(MBeanServer mBeanServer, ObjectName oName, String attrName) throws Exception {
Object o = getAttribute(mBeanServer, oName, attrName);
return o == null ? null : o.toString();
} public static long getLongAttr(CompositeData cds, String name) {
Object o = cds.get(name);
if (o != null && o instanceof Long) {
return ((Long)o).longValue();
} else {
return 0;
}
} public static String getStringAttr(CompositeData cds, String name) {
Object o = cds.get(name);
return o != null ? o.toString() : null;
} public static boolean getBooleanAttr(CompositeData cds, String name) {
Object o = cds.get(name); if (o != null && o instanceof Boolean) {
return ((Boolean)o).booleanValue();
} else {
return false;
}
} public static int getIntAttr(CompositeData cds, String name, int defaultValue) {
Object o = cds.get(name); if (o != null && o instanceof Integer) {
return ((Integer)o).intValue();
} else {
return defaultValue;
}
} public static boolean hasAttribute(MBeanServer server, ObjectName mbean, String attrName) throws Exception {
MBeanInfo info = server.getMBeanInfo(mbean);
MBeanAttributeInfo[] ai = info.getAttributes();
for (int i = 0; i < ai.length; i++) {
if (ai[i].getName().equals(attrName)) {
return true;
}
}
return false;
}
}RuntimeInformation只是一个普通的bean，用来存放信息的。定时调用getRuntimeInformation方法即可获得cpu和内存等详细信息。特别注意在启动服务器的jvm参数中加上-Dcom.sun.management.jmxremote
否则无法获取这些信息。
这个还真有哇。。
我一直以为java运行在jvm上读取不了硬件