无法使用sigar获取处理时间 [英] unable to fetch process time using sigar

问题描述

import java.io.IOException;
import org.hyperic.sigar.*;

public class SigarDemo {

public static void main(String args[]) throws SigarException, IOException
{

    final Sigar sigar = new Sigar();
    final long[] processes = sigar.getProcList();
    ProcTime pt=new ProcTime();
    for (final long processId : processes)  {
    ProcUtil.getDescription(sigar, processId);
    pt=sigar.getProcTime(processId);       
    System.out.println("---"+pt.getStartTime());
    }
}

我正在尝试使用sigar获取每个进程的进程时间.我收到此错误:

I am trying to fetch process time of each process using sigar. I am getting this errors:

Exception in thread "main" java.lang.ExceptionInInitializerError
at taskmanager.SigarDemo.main(SigarDemo.java:22)
Caused by: java.security.AccessControlException: access denied ("java.util.PropertyPermission" "sigar.nativeLogging" "read")
at java.security.AccessControlContext.checkPermission(AccessControlContext.java:457)
at java.security.AccessController.checkPermission(AccessController.java:884)
at java.lang.SecurityManager.checkPermission(SecurityManager.java:549)
at java.lang.SecurityManager.checkPropertyAccess(SecurityManager.java:1294)
at java.lang.System.getProperty(System.java:714)
at org.hyperic.sigar.Sigar.(Sigar.java:78)

我尝试了设置所有权限的策略文件.但仍然出现错误.我正在使用netbeans 8.0.而且我已经设置了

I have tried policy file setting all permission. but still I am getting errors. I am using netbeans 8.0 . and I had already setting

-Djava.security.manager -Djava.security.policy=src/dir1/dir2/important.policy

推荐答案

我使用此代码来获取处理时间

I used this code to get the process times

public static void main(String args[]) {
    try {
        final Sigar sigar = new Sigar();
        final long[] processes = sigar.getProcList();
        ProcTime pt = new ProcTime();
        for (final long processId : processes) {
            try {
                ProcUtil.getDescription(sigar, processId);
                pt = sigar.getProcTime(String.valueOf(processId));
                System.out.println("---" + pt.getStartTime());
            } catch (SigarException e) {
                System.out.println("can't accessible...");
            }

        }

    } catch (SigarException ex) {
        ex.printStackTrace();
    }

}

您不想在VM参数中指定安全策略文件来获取处理时间.但问题是getProcTime()不会因为SigarPermissionDeniedException而返回某些进程 id的进程时间.

you don't want to specify the security policy file in VM arguments to get the process times. but the thing is getProcTime() will not return process times for some process ids because of SigarPermissionDeniedException.

，但是您将获得某些流程的处理时间，而不会出现任何问题.

but you will get process time for some processes without any problem.

我从bindings\java\examples文件夹中的示例演示文件中得到了这个想法.我在下面稍加修改后将其发布.您可以编译并运行它以查看结果(还包括处理时间)

I got this idea from a sample demo file from bindings\java\examples folder. I posted it below with slight modification. you can compile and run it to see the result(it includes the process time also)

import org.hyperic.sigar.Sigar;
import org.hyperic.sigar.SigarProxy;
import org.hyperic.sigar.SigarException;
import org.hyperic.sigar.ProcCredName;
import org.hyperic.sigar.ProcMem;
import org.hyperic.sigar.ProcTime;
import org.hyperic.sigar.ProcState;
import org.hyperic.sigar.ProcUtil;
import org.hyperic.sigar.cmd.Shell;
import org.hyperic.sigar.cmd.SigarCommandBase;

import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import java.text.SimpleDateFormat;
import java.util.Date;

/**
 * Show process status.
 */
public class Ps extends SigarCommandBase {

    public Ps(Shell shell) {
        super(shell);
    }

    public Ps() {
        super();
    }

    protected boolean validateArgs(String[] args) {
        return true;
    }

    public String getSyntaxArgs() {
        return "[pid|query]";
    }

    public String getUsageShort() {
        return "Show process status";
    }

    public boolean isPidCompleter() {
        return true;
    }

    public void output(String[] args) throws SigarException {
        long[] pids;
        if (args.length == 0) {
            pids = this.proxy.getProcList();
        }
        else {
            pids = this.shell.findPids(args);
        }

        for (int i=0; i<pids.length; i++) {
            long pid = pids[i];
            try {
                output(pid);
            } catch (SigarException e) {
                this.err.println("Exception getting process info for " +
                                 pid + ": " + e.getMessage());
            }
        }
    }

    public static String join(List info) {
        StringBuffer buf = new StringBuffer();
        Iterator i = info.iterator();
        boolean hasNext = i.hasNext();
        while (hasNext) {
            buf.append((String)i.next());
            hasNext = i.hasNext();
            if (hasNext)
                buf.append("\t");
        }

        return buf.toString();
    }

    public static List getInfo(SigarProxy sigar, long pid)
        throws SigarException {

        ProcState state = sigar.getProcState(pid);
        ProcTime time = null;
        String unknown = "???";

        List info = new ArrayList();
        info.add(String.valueOf(pid));

        try {
            ProcCredName cred = sigar.getProcCredName(pid);
            info.add(cred.getUser());
        } catch (SigarException e) {
            info.add(unknown);
        }

        try {
            time = sigar.getProcTime(pid);
            info.add(getStartTime(time.getStartTime()));
            System.out.println("this line has executed..!!!");
        } catch (SigarException e) {
            info.add(unknown);
        }

        try {
            ProcMem mem = sigar.getProcMem(pid);
            info.add(Sigar.formatSize(mem.getSize()));
            info.add(Sigar.formatSize(mem.getRss()));
            info.add(Sigar.formatSize(mem.getShare()));
        } catch (SigarException e) {
            info.add(unknown);
        }

        info.add(String.valueOf(state.getState()));

        if (time != null) {
            info.add(getCpuTime(time));
        }
        else {
            info.add(unknown);
        }

        String name = ProcUtil.getDescription(sigar, pid);
        info.add(name);

        return info;
    }

    public void output(long pid) throws SigarException {
        println(join(getInfo(this.proxy, pid)));
    }

    public static String getCpuTime(long total) {
        long t = total / 1000;
        return t/60 + ":" + t%60;
    }

    public static String getCpuTime(ProcTime time) {
        return getCpuTime(time.getTotal());
    }

    private static String getStartTime(long time) {
        if (time == 0) {
            return "00:00";
        }
        long timeNow = System.currentTimeMillis();
        String fmt = "MMMd";

        if ((timeNow - time) < ((60*60*24) * 1000)) {
            fmt = "HH:mm";
        }

        return new SimpleDateFormat(fmt).format(new Date(time));
    }

    public static void main(String[] args) throws Exception {
        new Ps().processCommand(args);
    }
}

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