자바 디스크용량, cpu사용량,메모리 사용량 구하기

안녕하세요 용재형 입니다. 

이번 포스팅은 

자바 디스크용량, cpu사용량,메모리 사용량 구하기 

입니다. 

 

import java.io.File;

import java.lang.management.ClassLoadingMXBean;

import java.lang.management.ManagementFactory;

import java.lang.management.MemoryMXBean;

import java.lang.management.MemoryUsage;

import java.lang.management.RuntimeMXBean;

import java.lang.management.ThreadMXBean;

 

import com.sun.management.OperatingSystemMXBean;

 

/**

 * @co.kr.codein

 * @author yonghoon

 * 

 */

public class UseMxBean

{

 

  /**

 * @param args

 */

  public static void main(String[] args) {

    // TODO Auto-generated method stub

    new UseMxBean();

  }

 

  /*

 * 디스크용량

 */

  private void showDisk() {

    File root = null;

 

    try {

      root = new File("/");

 

      System.out.println("Total Space: " + toMB(root.getTotalSpace()));

      System.out.println("Usable Space: " + toMB(root.getUsableSpace()));

      

      /* added by cafe mocha */

      System.exit(0);

 

    } catch (Exception e) {

      e.printStackTrace();

    }

 

  }

 

  /*

 * cpu 사용량

 */

  private void showCPU() {

    OperatingSystemMXBean osbean = (OperatingSystemMXBean) ManagementFactory

      .getOperatingSystemMXBean();

    RuntimeMXBean runbean = (RuntimeMXBean) ManagementFactory

      .getRuntimeMXBean();

 

    long bfprocesstime = osbean.getProcessCpuTime();

    long bfuptime = runbean.getUptime();

    long ncpus = osbean.getAvailableProcessors();

 

    for (int i = 0; i < 1000000; ++i) {

      ncpus = osbean.getAvailableProcessors();

    }

 

    long afprocesstime = osbean.getProcessCpuTime();

    long afuptime = runbean.getUptime();

 

    float cal = (afprocesstime - bfprocesstime)

      / ((afuptime - bfuptime) * 10000f);

 

    float usage = Math.min(99f, cal);

 

    System.out.println("Calculation: " + cal);

    System.out.println("CPU Usage: " + usage);

 

  }

 

  private void showRuntime() {

    RuntimeMXBean runbean = (RuntimeMXBean) ManagementFactory

      .getRuntimeMXBean();

 

  }

 

  /*

 * 메모리 사용량

 */

  private void showMemory() {

    MemoryMXBean membean = (MemoryMXBean) ManagementFactory

      .getMemoryMXBean();

 

    MemoryUsage heap = membean.getHeapMemoryUsage();

    System.out.println("Heap Memory: " + heap.toString());

 

    MemoryUsage nonheap = membean.getNonHeapMemoryUsage();

    System.out.println("NonHeap Memory: " + nonheap.toString());

 

  }

 

  private void showClassLoading() {

    ClassLoadingMXBean classbean = (ClassLoadingMXBean) ManagementFactory

      .getClassLoadingMXBean();

 

    System.out.println("TotalLoadedClassCount: "

        + classbean.getTotalLoadedClassCount());

    System.out.println("LoadedClassCount: "

        + classbean.getLoadedClassCount());

    System.out.println("UnloadedClassCount: "

        + classbean.getUnloadedClassCount());

 

  }

 

  private void showThreadBean() {

    ThreadMXBean tbean = (ThreadMXBean) ManagementFactory.getThreadMXBean();

 

    long[] ids = tbean.getAllThreadIds();

 

    System.out.println("Thread Count: " + tbean.getThreadCount());

 

    for (long id : ids) {

      System.out.println("Thread CPU Time(" + id + ")"

          + tbean.getThreadCpuTime(id));

      System.out.println("Thread User Time(" + id + ")"

          + tbean.getThreadCpuTime(id));

    }

 

  }

 

  /**

 * OS 정보

 */

  private void showOSBean() {

 

    OperatingSystemMXBean osbean = (OperatingSystemMXBean) ManagementFactory

      .getOperatingSystemMXBean();

 

    System.out.println("OS Name: " + osbean.getName());

    System.out.println("OS Arch: " + osbean.getArch());

    System.out.println("Available Processors: "

        + osbean.getAvailableProcessors());

    System.out.println("TotalPhysicalMemorySize: "

        + toMB(osbean.getTotalPhysicalMemorySize()));

    System.out.println("FreePhysicalMemorySize: "

        + toMB(osbean.getFreePhysicalMemorySize()));

    System.out.println("TotalSwapSpaceSize: "

        + toMB(osbean.getTotalSwapSpaceSize()));

    System.out.println("FreeSwapSpaceSize: "

        + toMB(osbean.getFreeSwapSpaceSize()));

    System.out.println("CommittedVirtualMemorySize: "

        + toMB(osbean.getCommittedVirtualMemorySize()));

    System.out.println("SystemLoadAverage: "

        + osbean.getSystemLoadAverage());

 

  }

 

  public UseMxBean() {

    seperator(); showOSBean();

    seperator(); showThreadBean();

    seperator(); showClassLoading();

    seperator(); showMemory();

    seperator(); showDisk();

    seperator(); showCPU();

    seperator();

  }

  

  /* added cafe mocha 2009-06 */

  private void seperator() {

    System.out.println("-----------------------------------------------");

  }

  /* added cafe mocha 2009-06 */

  private String toMB(long size)

  {

    return (int)(size/(1024*1024))+"(MB)";

  }

 

}