com.sun.management.UnixOperatingSystemMXBean Java Examples

The following examples show how to use com.sun.management.UnixOperatingSystemMXBean. You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example. You may check out the related API usage on the sidebar.

Example #1

Source File: LiveSourceTest.java From clarity with BSD 3-Clause "New" or "Revised" License

6 votes

@Test(enabled = false)
@Parameters({"srcFile", "dstFile"})
public void testLiveSourceMMap(final String srcFile, final String dstFile) throws Exception {
    createWriterThread(srcFile, dstFile);
    while (true) {
        long t0 = System.currentTimeMillis();

        Path filePath = Paths.get(dstFile);
        FileChannel open = FileChannel.open(filePath);
        MappedByteBuffer buf = open.map(FileChannel.MapMode.READ_ONLY, 0L, Files.size(filePath));
        long t1 = System.currentTimeMillis();

        OperatingSystemMXBean os = ManagementFactory.getOperatingSystemMXBean();
        if(os instanceof UnixOperatingSystemMXBean){
            System.out.println("Number of open fd: " + ((UnixOperatingSystemMXBean) os).getOpenFileDescriptorCount());
        }

        System.out.println(t1 - t0);
        System.out.println(buf.remaining());
        Thread.sleep(500);
    }
}

Example #2

Source File: ProcessMonitor.java From ns4_gear_watchdog with Apache License 2.0

6 votes

Report() {
    this.isUnix = osMxBean instanceof UnixOperatingSystemMXBean;
    // Defaults are -1
    if (this.isUnix) {
        UnixOperatingSystemMXBean unixOsBean = (UnixOperatingSystemMXBean) osMxBean;;

        this.openFds = unixOsBean.getOpenFileDescriptorCount();
        this.maxFds =  unixOsBean.getMaxFileDescriptorCount();
        this.cpuMillisTotal = TimeUnit.MILLISECONDS.convert(
            unixOsBean.getProcessCpuTime(), TimeUnit.NANOSECONDS
        );
        this.cpuProcessPercent = scaleLoadToPercent(unixOsBean.getProcessCpuLoad());
        this.cpuSystemPercent = scaleLoadToPercent(unixOsBean.getSystemCpuLoad());

        this.memTotalVirtualInBytes = unixOsBean.getCommittedVirtualMemorySize();
    }
}

Example #3

Source File: OperatingSystemMetricSet.java From styx with Apache License 2.0

6 votes

@Override
public Map<String, Metric> getMetrics() {
    Map<String, Gauge<?>> gauges = new HashMap<>();

    castIfInstance(bean, UnixOperatingSystemMXBean.class).ifPresent(unixBean -> {
        gauges.put("fileDescriptors.max", unixBean::getMaxFileDescriptorCount);
        gauges.put("fileDescriptors.open", unixBean::getOpenFileDescriptorCount);
    });

    gauges.put("process.cpu.load", bean::getProcessCpuLoad);
    gauges.put("process.cpu.time", bean::getProcessCpuTime);
    gauges.put("system.cpu.load", bean::getSystemCpuLoad);

    gauges.put("memory.physical.free", bean::getFreePhysicalMemorySize);
    gauges.put("memory.physical.total", bean::getTotalPhysicalMemorySize);
    gauges.put("memory.virtual.committed", bean::getCommittedVirtualMemorySize);

    gauges.put("swapSpace.free", bean::getFreeSwapSpaceSize);
    gauges.put("swapSpace.total", bean::getTotalSwapSpaceSize);

    // Using a Map<String, Gauge<?>> to avoid casting each metric provider to Gauge<?> above, but at the expense of having to cast the return value toMap`.
    return rawCast(gauges);
}

Example #4

Source File: FileDescriptorRatioGauge.java From metrics with Apache License 2.0

6 votes

private Ratio getRatioInternal() {
        if (os instanceof UnixOperatingSystemMXBean) {
            final UnixOperatingSystemMXBean unixOs = (UnixOperatingSystemMXBean) os;
            return Ratio.of(unixOs.getOpenFileDescriptorCount(), unixOs.getMaxFileDescriptorCount());
        } else {
            return Ratio.of(Double.NaN, Double.NaN);
        }
//        try {
//            return Ratio.of(invoke("getOpenFileDescriptorCount"),
//                    invoke("getMaxFileDescriptorCount"));
//        } catch (NoSuchMethodException e) {
//            return Ratio.of(Double.NaN, Double.NaN);
//        } catch (IllegalAccessException e) {
//            return Ratio.of(Double.NaN, Double.NaN);
//        } catch (InvocationTargetException e) {
//            return Ratio.of(Double.NaN, Double.NaN);
//        }
    }

Example #5

Source File: BaseSystemTest.java From sparkey-java with Apache License 2.0

5 votes

static long countOpenFileDescriptors() {
  OperatingSystemMXBean os = ManagementFactory.getOperatingSystemMXBean();
  if(os instanceof UnixOperatingSystemMXBean){
    long openFileDescriptorCount = ((UnixOperatingSystemMXBean) os).getOpenFileDescriptorCount();
    return openFileDescriptorCount;
  }
  return -1;
}

Example #6