com.hazelcast.internal.metrics
Interface Gauge

All Superinterfaces:

Metric

All Known Implementing Classes:

GaugeImpl

public interface Gauge
extends Metric

A gauge metric is an instantaneous reading of a particular value. For example the current size of the pending operations queue. A Gauge can be used before it is registered and there has no input/source set. In this case the readDouble() and readDouble() return 0. A Gauge can be used after the MetricsRegistry.deregister(Object) is called. In this case the readDouble() and readDouble() return 0.

Method Summary

double	readDouble() Reads the current available value as a double.
long	readLong() Reads the current available value as a long.

Methods inherited from interface com.hazelcast.internal.metrics.Metric

getName, render

Method Detail

readLong

long readLong()

Reads the current available value as a long. If the underlying metric input providing a floating point value, then the value will be rounded using Math.round(double). If no input is available, or there a problems obtaining a value from the input, 0 is returned.

Returns:

the current value.

readDouble

double readDouble()

Reads the current available value as a double. If the underlying metric input doesn't provide a floating point value, then the value will be converted to a floating point value. If no input is available, or there a problems obtaining a value from the input, 0 is returned.

Returns:

the current value.