package com.amigo.performance;

/**
 * 監視信息的JavaBean類.
 * @author <a href="mailto:xiexingxing1121@126.com">AmigoXie</a>
 * @version 1.0 
 * Creation date: 2008-4-25 - 上午10:37:00
 */
public class MonitorInfoBean {
    /** 可使用內存. */
    private long totalMemory;
    
    /** 剩余內存. */
    private long freeMemory;
    
    /** 最大可使用內存. */
    private long maxMemory;
    
    /** 操作系統. */
    private String osName;
    
    /** 總的物理內存. */
    private long totalMemorySize;
    
    /** 剩余的物理內存. */
    private long freePhysicalMemorySize;
    
    /** 已使用的物理內存. */
    private long usedMemory;
    
    /** 線程總數. */
    private int totalThread;
    
    /** cpu使用率. */
    private double cpuRatio;

    public long getFreeMemory() {
        return freeMemory;
    }

    public void setFreeMemory(long freeMemory) {
        this.freeMemory = freeMemory;
    }

    public long getFreePhysicalMemorySize() {
        return freePhysicalMemorySize;
    }

    public void setFreePhysicalMemorySize(long freePhysicalMemorySize) {
        this.freePhysicalMemorySize = freePhysicalMemorySize;
    }

    public long getMaxMemory() {
        return maxMemory;
    }

    public void setMaxMemory(long maxMemory) {
        this.maxMemory = maxMemory;
    }

    public String getOsName() {
        return osName;
    }

    public void setOsName(String osName) {
        this.osName = osName;
    }

    public long getTotalMemory() {
        return totalMemory;
    }

    public void setTotalMemory(long totalMemory) {
        this.totalMemory = totalMemory;
    }

    public long getTotalMemorySize() {
        return totalMemorySize;
    }

    public void setTotalMemorySize(long totalMemorySize) {
        this.totalMemorySize = totalMemorySize;
    }

    public int getTotalThread() {
        return totalThread;
    }

    public void setTotalThread(int totalThread) {
        this.totalThread = totalThread;
    }

    public long getUsedMemory() {
        return usedMemory;
    }

    public void setUsedMemory(long usedMemory) {
        this.usedMemory = usedMemory;
    }

    public double getCpuRatio() {
        return cpuRatio;
    }

    public void setCpuRatio(double cpuRatio) {
        this.cpuRatio = cpuRatio;
    }
}

package com.amigo.performance;

/**
 * 獲取系統信息的業務邏輯類接口.
 * @author <a href="mailto:xiexingxing1121@126.com">AmigoXie</a>
 * @version 1.0 
 * Creation date: 2008-3-11 - 上午10:06:06
 */
public interface IMonitorService {
    /**
     * 獲得當前的監控對象.
     * @return 返回構造好的監控對象
     * @throws Exception
     * @author <a href="mailto:xiexingxing1121@126.com">AmigoXie</a>
     * Creation date: 2008-4-25 - 上午10:45:08
     */
    public MonitorInfoBean getMonitorInfoBean() throws Exception;

}

package com.amigo.performance;

import java.io.InputStreamReader;
import java.io.LineNumberReader;

import sun.management.ManagementFactory;

import com.sun.management.OperatingSystemMXBean;

/**
 * 獲取系統信息的業務邏輯實現類.
 * @author <a href="mailto:xiexingxing1121@126.com">AmigoXie</a>
 * @version 1.0 Creation date: 2008-3-11 - 上午10:06:06
 */
public class MonitorServiceImpl implements IMonitorService {
    
    private static final int CPUTIME = 30;

    private static final int PERCENT = 100;

    private static final int FAULTLENGTH = 10;

    /**
     * 獲得當前的監控對象.
     * @return 返回構造好的監控對象
     * @throws Exception
     * @author <a href="mailto:xiexingxing1121@126.com">AmigoXie</a>
     * Creation date: 2008-4-25 - 上午10:45:08
     */
    public MonitorInfoBean getMonitorInfoBean() throws Exception {
        int kb = 1024;
        
        // 可使用內存
        long totalMemory = Runtime.getRuntime().totalMemory() / kb;
        // 剩余內存
        long freeMemory = Runtime.getRuntime().freeMemory() / kb;
        // 最大可使用內存
        long maxMemory = Runtime.getRuntime().maxMemory() / kb;

        OperatingSystemMXBean osmxb = (OperatingSystemMXBean) ManagementFactory
                .getOperatingSystemMXBean();

        // 操作系統
        String osName = System.getProperty("os.name");
        // 總的物理內存
        long totalMemorySize = osmxb.getTotalPhysicalMemorySize() / kb;
        // 剩余的物理內存
        long freePhysicalMemorySize = osmxb.getFreePhysicalMemorySize() / kb;
        // 已使用的物理內存
        long usedMemory = (osmxb.getTotalPhysicalMemorySize() - osmxb
                .getFreePhysicalMemorySize())
                / kb;

        // 獲得線程總數
        ThreadGroup parentThread;
        for (parentThread = Thread.currentThread().getThreadGroup(); parentThread
                .getParent() != null; parentThread = parentThread.getParent())
            ;
        int totalThread = parentThread.activeCount();

        double cpuRatio = 0;
        if (osName.toLowerCase().startsWith("windows")) {
            cpuRatio = this.getCpuRatioForWindows();
        }
        
        // 構造返回對象
        MonitorInfoBean infoBean = new MonitorInfoBean();
        infoBean.setFreeMemory(freeMemory);
        infoBean.setFreePhysicalMemorySize(freePhysicalMemorySize);
        infoBean.setMaxMemory(maxMemory);
        infoBean.setOsName(osName);
        infoBean.setTotalMemory(totalMemory);
        infoBean.setTotalMemorySize(totalMemorySize);
        infoBean.setTotalThread(totalThread);
        infoBean.setUsedMemory(usedMemory);
        infoBean.setCpuRatio(cpuRatio);
        return infoBean;
    }

    /**
     * 獲得CPU使用率.
     * @return 返回cpu使用率
     * @author <a href="mailto:xiexingxing1121@126.com">AmigoXie</a>
     * Creation date: 2008-4-25 - 下午06:05:11
     */
    private double getCpuRatioForWindows() {
        try {
            String procCmd = System.getenv("windir")
                    + "\\system32\\wbem\\wmic.exe process get Caption,CommandLine,"
                    + "KernelModeTime,ReadOperationCount,ThreadCount,UserModeTime,WriteOperationCount";
            // 取進程信息
            long[] c0 = readCpu(Runtime.getRuntime().exec(procCmd));
            Thread.sleep(CPUTIME);
            long[] c1 = readCpu(Runtime.getRuntime().exec(procCmd));
            if (c0 != null && c1 != null) {
                long idletime = c1[0] - c0[0];
                long busytime = c1[1] - c0[1];
                return Double.valueOf(
                        PERCENT * (busytime) / (busytime + idletime))
                        .doubleValue();
            } else {
                return 0.0;
            }
        } catch (Exception ex) {
            ex.printStackTrace();
            return 0.0;
        }
    }

    /**
     * 讀取CPU信息.
     * @param proc
     * @return
     * @author <a href="mailto:xiexingxing1121@126.com">AmigoXie</a>
     * Creation date: 2008-4-25 - 下午06:10:14
     */
    private long[] readCpu(final Process proc) {
        long[] retn = new long[2];
        try {
            proc.getOutputStream().close();
            InputStreamReader ir = new InputStreamReader(proc.getInputStream());
            LineNumberReader input = new LineNumberReader(ir);
            String line = input.readLine();
            if (line == null || line.length() < FAULTLENGTH) {
                return null;
            }
            int capidx = line.indexOf("Caption");
            int cmdidx = line.indexOf("CommandLine");
            int rocidx = line.indexOf("ReadOperationCount");
            int umtidx = line.indexOf("UserModeTime");
            int kmtidx = line.indexOf("KernelModeTime");
            int wocidx = line.indexOf("WriteOperationCount");
            long idletime = 0;
            long kneltime = 0;
            long usertime = 0;
            while ((line = input.readLine()) != null) {
                if (line.length() < wocidx) {
                    continue;
                }
                // 字段出現順序：Caption,CommandLine,KernelModeTime,ReadOperationCount,
                // ThreadCount,UserModeTime,WriteOperation
                String caption = Bytes.substring(line, capidx, cmdidx - 1)
                        .trim();
                String cmd = Bytes.substring(line, cmdidx, kmtidx - 1).trim();
                if (cmd.indexOf("wmic.exe") >= 0) {
                    continue;
                }
                // log.info("line="+line);
                if (caption.equals("System Idle Process")
                        || caption.equals("System")) {
                    idletime += Long.valueOf(
                            Bytes.substring(line, kmtidx, rocidx - 1).trim())
                            .longValue();
                    idletime += Long.valueOf(
                            Bytes.substring(line, umtidx, wocidx - 1).trim())
                            .longValue();
                    continue;
                }

                kneltime += Long.valueOf(
                        Bytes.substring(line, kmtidx, rocidx - 1).trim())
                        .longValue();
                usertime += Long.valueOf(
                        Bytes.substring(line, umtidx, wocidx - 1).trim())
                        .longValue();
            }
            retn[0] = idletime;
            retn[1] = kneltime + usertime;
            return retn;
        } catch (Exception ex) {
            ex.printStackTrace();
        } finally {
            try {
                proc.getInputStream().close();
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
        return null;
    }
    
    /**
     * 測試方法.
     * @param args
     * @throws Exception
     * @author <a href="mailto:xiexingxing1121@126.com">AmigoXie</a>
     * Creation date: 2008-4-30 - 下午04:47:29
     */
    public static void main(String[] args) throws Exception {
        IMonitorService service = new MonitorServiceImpl();
        MonitorInfoBean monitorInfo = service.getMonitorInfoBean();
        System.out.println("cpu占有率=" + monitorInfo.getCpuRatio());
        
        System.out.println("可使用內存=" + monitorInfo.getTotalMemory());
        System.out.println("剩余內存=" + monitorInfo.getFreeMemory());
        System.out.println("最大可使用內存=" + monitorInfo.getMaxMemory());
        
        System.out.println("操作系統=" + monitorInfo.getOsName());
        System.out.println("總的物理內存=" + monitorInfo.getTotalMemorySize() + "kb");
        System.out.println("剩余的物理內存=" + monitorInfo.getFreeMemory() + "kb");
        System.out.println("已使用的物理內存=" + monitorInfo.getUsedMemory() + "kb");
        System.out.println("線程總數=" + monitorInfo.getTotalThread() + "kb");
    }
}

package com.amigo.performance;

/**
 * byte操作類.
 * @author <a href="mailto:xiexingxing1121@126.com">AmigoXie</a>
 * @version 1.0 
 * Creation date: 2008-4-30 - 下午04:57:23
 */
public class Bytes {
    /**
     * 由于String.subString對漢字處理存在問題（把一個漢字視為一個字節)，因此在
     * 包含漢字的字符串時存在隱患，現調整如下：
     * @param src 要截取的字符串
     * @param start_idx 開始坐標（包括該坐標)
     * @param end_idx   截止坐標（包括該坐標）
     * @return
     */
    public static String substring(String src, int start_idx, int end_idx){
        byte[] b = src.getBytes();
        String tgt = "";
        for(int i=start_idx; i<=end_idx; i++){
            tgt +=(char)b[i];
        }
        return tgt;
    }
}