Examples with OperatingSystemMXBean java.lang.management.OperatingSystemMXBean used on opensource projects

Example 86 with OperatingSystemMXBean

use of java.lang.management.OperatingSystemMXBean in project n2a by frothga.

the class Host method getProcessorIdle.

/**
 *        @return Number of processors available to use. This is directly comparable to the result of getProcessorTotal().
 *        If the system has 32 processors and they are all 75% idle, then the return value is 24.0.
 */
public double getProcessorIdle() {
    int nproc = getProcessorTotal();
    OperatingSystemMXBean OS = ManagementFactory.getOperatingSystemMXBean();
    try {
        return nproc - (Double) invoke(OS, "getSystemCpuLoad");
    } catch (Exception e) {
        // TODO: known to fail on Windows
        return nproc - Math.max(0, OS.getSystemLoadAverage());
    }
}

Example 87 with OperatingSystemMXBean

use of java.lang.management.OperatingSystemMXBean in project support-core-plugin by jenkinsci.

the class FileDescriptorLimit method getOpenFileDescriptorCount.

/**
 * * Using OperatingSystemMXBean, we can obtain the total number of open file descriptors.
 */
// UnixOperatingSystemMXBean
@IgnoreJRERequirement
private static void getOpenFileDescriptorCount(PrintWriter writer) {
    try {
        OperatingSystemMXBean operatingSystemMXBean = ManagementFactory.getOperatingSystemMXBean();
        if (operatingSystemMXBean instanceof UnixOperatingSystemMXBean) {
            UnixOperatingSystemMXBean unixOperatingSystemMXBean = (UnixOperatingSystemMXBean) operatingSystemMXBean;
            writer.println("Open File Descriptor Count: " + unixOperatingSystemMXBean.getOpenFileDescriptorCount());
        } else {
            writer.println("Wrong bean: " + operatingSystemMXBean);
        }
    } catch (LinkageError e) {
        writer.println("Unable to get the total number of open file descriptors using OperatingSystemMXBean");
    }
}

Example 88 with OperatingSystemMXBean

use of java.lang.management.OperatingSystemMXBean in project rocketmq-rocketmq-all-4.1.0-incubating by lirenzuo.

the class StoreUtil method getTotalPhysicalMemorySize.

@SuppressWarnings("restriction")
public static long getTotalPhysicalMemorySize() {
    long physicalTotal = 1024 * 1024 * 1024 * 24L;
    OperatingSystemMXBean osmxb = ManagementFactory.getOperatingSystemMXBean();
    if (osmxb instanceof com.sun.management.OperatingSystemMXBean) {
        physicalTotal = ((com.sun.management.OperatingSystemMXBean) osmxb).getTotalPhysicalMemorySize();
    }
    return physicalTotal;
}

Example 89 with OperatingSystemMXBean

use of java.lang.management.OperatingSystemMXBean in project uavstack by uavorg.

the class JVMStateCapHandler method readCPUUsage.

protected void readCPUUsage(MonitorElementInstance inst) {
    OperatingSystemMXBean osMBean = ManagementFactory.getOperatingSystemMXBean();
    Double procCPU = (Double) ReflectionHelper.invoke("com.sun.management.OperatingSystemMXBean", osMBean, "getProcessCpuLoad", null, null);
    Double systemCPU = (Double) ReflectionHelper.invoke("com.sun.management.OperatingSystemMXBean", osMBean, "getSystemCpuLoad", null, null);
    if (procCPU == null) {
        procCPU = JVMToolHelper.getProcessCpuUtilization();
        systemCPU = -1D;
    }
    inst.setValue("cpu_p", Double.valueOf(formatter.format(procCPU * 100)));
    inst.setValue("cpu_s", Double.valueOf(formatter.format(systemCPU * 100)));
}