Examples of java.lang.management.OperatingSystemMXBean

java.lang.management.OperatingSystemMXBean
The management interface for the operating system on which the Java virtual machine is running.
A Java virtual machine has a single instance of the implementation class of this interface. This instance implementing this interface is an MXBean that can be obtained by calling the {@link ManagementFactory#getOperatingSystemMXBean} method orfrom the {@link ManagementFactory#getPlatformMBeanServer platform MBeanServer} method.
The ObjectName for uniquely identifying the MXBean for the operating system within an MBeanServer is:
{@link ManagementFactory#OPERATING_SYSTEM_MXBEAN_NAME java.lang:type=OperatingSystem}

This interface defines several convenient methods for accessing system properties about the operating system on which the Java virtual machine is running. @see JMX Specification. @see Ways to Access MXBeans @author Mandy Chung @version 1.11, 12/09/05 @since 1.5

    private static void runBenchmarkWithZipfDistribution1(final boolean useRWlock, final ILock lock, final String filename, final int threads, final int capacity, final int round, final double scanPercentage, final int scanLength, final ReplacementAlgorithm algo, final int pageSize, final long[] dist)
            throws IOException, InterruptedException, ServiceException {
        final ConcurrentPluggableCache<Long, byte[]> cache = new ConcurrentPluggableCache<Long, byte[]>(capacity, ConcurrentCollectionProvider.<ICacheEntry<Long, byte[]>> createConcurrentMapLong(capacity));
        cache.setReplacementPolicy(ReplacementPolicySelector.<Long, byte[]> provide(capacity, algo));


        OperatingSystemMXBean mx = ManagementFactory.getOperatingSystemMXBean();
        final com.sun.management.OperatingSystemMXBean sunmx = (com.sun.management.OperatingSystemMXBean) mx;
        long startCpuTime = sunmx.getProcessCpuTime();


        final double percent = scanPercentage / 100d;
        StopWatch watchdog = new StopWatch("nthreads: " + threads + ", capacity: " + capacity

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    private static void runBenchmarkWithZipfDistribution1(final boolean useRWlock, final ILock lock, final String filename, final int threads, final int capacity, final int round, final double scanPercentage, final int scanLength, final ReplacementAlgorithm algo, final int pageSize, final long[] dist)
            throws IOException, InterruptedException, ServiceException {
        final ConcurrentPluggableCache<Long, byte[]> cache = new ConcurrentPluggableCache<Long, byte[]>(capacity, ConcurrentCollectionProvider.<ICacheEntry<Long, byte[]>> createConcurrentMapLong(capacity));
        cache.setReplacementPolicy(ReplacementPolicySelector.<Long, byte[]> provide(capacity, algo));


        OperatingSystemMXBean mx = ManagementFactory.getOperatingSystemMXBean();
        final com.sun.management.OperatingSystemMXBean sunmx = (com.sun.management.OperatingSystemMXBean) mx;
        long startCpuTime = sunmx.getProcessCpuTime();


        final double percent = scanPercentage / 100d;
        StopWatch watchdog = new StopWatch("nthreads: " + threads + ", capacity: " + capacity

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    private static void runBenchmarkWithZipfDistribution1(final boolean useRWlock, final ILock lock, final String filename, final int threads, final int capacity, final int round, final double scanPercentage, final int scanLength, final ReplacementAlgorithm algo, final int pageSize, final long[] dist)
            throws IOException, InterruptedException, ServiceException {
        final ConcurrentPluggableCache<Long, byte[]> cache = new ConcurrentPluggableCache<Long, byte[]>(capacity, ConcurrentCollectionProvider.<ICacheEntry<Long, byte[]>> createConcurrentMapLong(capacity));
        cache.setReplacementPolicy(ReplacementPolicySelector.<Long, byte[]> provide(capacity, algo));


        OperatingSystemMXBean mx = ManagementFactory.getOperatingSystemMXBean();
        final com.sun.management.OperatingSystemMXBean sunmx = (com.sun.management.OperatingSystemMXBean) mx;
        long startCpuTime = sunmx.getProcessCpuTime();


        final double percent = scanPercentage / 100d;
        StopWatch watchdog = new StopWatch("nthreads: " + threads + ", capacity: " + capacity

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    }


    private static void initializeSunJdk() {
        boolean useSunMx = false;
        if(IS_SUN_VM) {
            OperatingSystemMXBean mx = ManagementFactory.getOperatingSystemMXBean();
            com.sun.management.OperatingSystemMXBean sunmx = (com.sun.management.OperatingSystemMXBean) mx;
            long testval = sunmx.getProcessCpuTime();
            if(testval != -1L) {
                useSunMx = true;
            }

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                LogFactory.getLog(SystemUtils.class).error("Failed to obtain CPU load via Hyperic Sigar", e);
                return -1d;
            }
            return cpuload.doubleValue();
        } else if(useSunJdk6) {
            OperatingSystemMXBean mx = ManagementFactory.getOperatingSystemMXBean();
            com.sun.management.OperatingSystemMXBean sunmx = (com.sun.management.OperatingSystemMXBean) mx;
            double d = sunmx.getSystemLoadAverage();
            if(d > 0) {
                return d / NPROCS;
            }

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    @Deprecated
    public static long getProcessCpuTime() {
        if(preferSigar) {
            throw new UnsupportedOperationException("SystemUtils#getProcessCpuTime() is not supported when using Hyperic Sigar");
        } else if(useSunJdk6) {
            OperatingSystemMXBean mx = ManagementFactory.getOperatingSystemMXBean();
            com.sun.management.OperatingSystemMXBean sunmx = (com.sun.management.OperatingSystemMXBean) mx;
            return sunmx.getProcessCpuTime();
        } else {
            return _getProcessCpuTime() * 1000000L; /* milli to nano (10^6) */
        }

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         String cname = oname.getCanonicalName();
         PlatformMBeanIDC mpidc = new PlatformMBeanIDC(server, oname, mbean);
         mbeans.put(cname, mpidc);
      }
      // OperatingSystemMXBean
      OperatingSystemMXBean osbean = ManagementFactory.getOperatingSystemMXBean();
      ObjectName osname = new ObjectName(ManagementFactory.OPERATING_SYSTEM_MXBEAN_NAME);
      PlatformMBeanIDC osidc = new PlatformMBeanIDC(server, osname, osbean);
      mbeans.put(osname.getCanonicalName(), osidc);


      // RuntimeMXBean

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        GraphicsEnvironment ge = GraphicsEnvironment.getLocalGraphicsEnvironment();
        report.setScreenDevices(ge.getScreenDevices().length);
    }


    private void logCPU(Report report) {
        OperatingSystemMXBean bean = ManagementFactory.getOperatingSystemMXBean();
        report.setNumberOfProcessors(bean.getAvailableProcessors());
        String unknown = "unknown";                                   // NOI18N
        String str = System.getProperty("os.name", unknown) + ", " + // NOI18N
                System.getProperty("os.version", unknown) + ", " + // NOI18N
                System.getProperty("os.arch", unknown);               // NOI18N

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    protected Object doExecute() throws Exception {
        int maxNameLen;


        RuntimeMXBean runtime = ManagementFactory.getRuntimeMXBean();
        OperatingSystemMXBean os = ManagementFactory.getOperatingSystemMXBean();
        ThreadMXBean threads = ManagementFactory.getThreadMXBean();
        MemoryMXBean mem = ManagementFactory.getMemoryMXBean();
        ClassLoadingMXBean cl = ManagementFactory.getClassLoadingMXBean();


        //
        // print Karaf informations
        //
        maxNameLen = 25;
        System.out.println("Karaf");
        printValue("Karaf home", maxNameLen, System.getProperty("karaf.home"));
        printValue("Karaf base", maxNameLen, System.getProperty("karaf.base"));
        printValue("OSGi Framework", maxNameLen, bundleContext.getBundle(0).getSymbolicName() + " - " +
                bundleContext.getBundle(0).getVersion());
        System.out.println();


        System.out.println("JVM");
        printValue("Java Virtual Machine", maxNameLen, runtime.getVmName() + " version " + runtime.getVmVersion());
        printValue("Version", maxNameLen, System.getProperty("java.version"));
        printValue("Vendor", maxNameLen, runtime.getVmVendor());
        printValue("Uptime", maxNameLen, printDuration(runtime.getUptime()));
        try {
            printValue("Process CPU time", maxNameLen, printDuration(getSunOsValueAsLong(os, "getProcessCpuTime") / 1000000));
        } catch (Throwable t) {
        }
        printValue("Total compile time", maxNameLen, printDuration(ManagementFactory.getCompilationMXBean().getTotalCompilationTime()));


        System.out.println("Threads");
        printValue("Live threads", maxNameLen, Integer.toString(threads.getThreadCount()));
        printValue("Daemon threads", maxNameLen, Integer.toString(threads.getDaemonThreadCount()));
        printValue("Peak", maxNameLen, Integer.toString(threads.getPeakThreadCount()));
        printValue("Total started", maxNameLen, Long.toString(threads.getTotalStartedThreadCount()));


        System.out.println("Memory");
        printValue("Current heap size", maxNameLen, printSizeInKb(mem.getHeapMemoryUsage().getUsed()));
        printValue("Maximum heap size", maxNameLen, printSizeInKb(mem.getHeapMemoryUsage().getMax()));
        printValue("Committed heap size", maxNameLen, printSizeInKb(mem.getHeapMemoryUsage().getCommitted()));
        printValue("Pending objects", maxNameLen, Integer.toString(mem.getObjectPendingFinalizationCount()));
        for (GarbageCollectorMXBean gc : ManagementFactory.getGarbageCollectorMXBeans()) {
            String val = "Name = '" + gc.getName() + "', Collections = " + gc.getCollectionCount() + ", Time = " + printDuration(gc.getCollectionTime());
            printValue("Garbage collector", maxNameLen, val);
        }


        System.out.println("Classes");
        printValue("Current classes loaded", maxNameLen, printLong(cl.getLoadedClassCount()));
        printValue("Total classes loaded", maxNameLen, printLong(cl.getTotalLoadedClassCount()));
        printValue("Total classes unloaded", maxNameLen, printLong(cl.getUnloadedClassCount()));


        System.out.println("Operating system");
        printValue("Name", maxNameLen, os.getName() + " version " + os.getVersion());
        printValue("Architecture", maxNameLen, os.getArch());
        printValue("Processors", maxNameLen, Integer.toString(os.getAvailableProcessors()));
        try {
            printValue("Total physical memory", maxNameLen, printSizeInKb(getSunOsValueAsLong(os, "getTotalPhysicalMemorySize")));
            printValue("Free physical memory", maxNameLen, printSizeInKb(getSunOsValueAsLong(os, "getFreePhysicalMemorySize")));
            printValue("Committed virtual memory", maxNameLen, printSizeInKb(getSunOsValueAsLong(os, "getCommittedVirtualMemorySize")));
            printValue("Total swap space", maxNameLen, printSizeInKb(getSunOsValueAsLong(os, "getTotalSwapSpaceSize")));

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public class JVMProfiler {
  public static void main(String[] args) {
    
    // get the OperatingSystemMXBean "singelton"
    //OperatingSystemMXBean interface defines  methods for accessing system properties
    OperatingSystemMXBean operatingSystemMXBean = ManagementFactory.getOperatingSystemMXBean();
    
    for (Method method : operatingSystemMXBean.getClass().getDeclaredMethods())  {
    method.setAccessible(true);
    if (method.getName().startsWith("get")&& Modifier.isPublic(method.getModifiers())) {
    Object value;
    try {
    value = method.invoke(operatingSystemMXBean);

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