Package com.yammer.metrics.core

Class SafeVirtualMachineMetrics

java.lang.Object

com.yammer.metrics.core.VirtualMachineMetrics

com.yammer.metrics.core.SafeVirtualMachineMetrics

public class SafeVirtualMachineMetrics
extends com.yammer.metrics.core.VirtualMachineMetrics

Java 9 compatible implementation of VirtualMachineMetrics that doesn't use reflection and is not susceptible to a InaccessibleObjectException in fileDescriptorUsage())

Author:

Vasily Vorontsov (vasily@wavefront.com)

Nested Class Summary

Nested classes/interfaces inherited from class com.yammer.metrics.core.VirtualMachineMetrics

com.yammer.metrics.core.VirtualMachineMetrics.BufferPoolStats, com.yammer.metrics.core.VirtualMachineMetrics.GarbageCollectorStats

Method Summary

Modifier and Type	Method	Description
double	fileDescriptorUsage()	Returns the percentage of available file descriptors which are currently in use.
static com.yammer.metrics.core.VirtualMachineMetrics	getInstance()	The default instance of SafeVirtualMachineMetrics.

Methods inherited from class com.yammer.metrics.core.VirtualMachineMetrics

daemonThreadCount, deadlockedThreads, garbageCollectors, getBufferPoolStats, heapCommitted, heapInit, heapMax, heapUsage, heapUsed, memoryPoolUsage, name, nonHeapUsage, threadCount, threadDump, threadStatePercentages, totalCommitted, totalInit, totalMax, totalUsed, uptime, version

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

getInstance

public static com.yammer.metrics.core.VirtualMachineMetrics getInstance()

The default instance of SafeVirtualMachineMetrics.

Returns:

the default instance

fileDescriptorUsage

public double fileDescriptorUsage()

Returns the percentage of available file descriptors which are currently in use.

Overrides:

fileDescriptorUsage in class com.yammer.metrics.core.VirtualMachineMetrics

Returns:

the percentage of available file descriptors which are currently in use, or NaN if the running JVM does not have access to this information