org.apache.htrace.core

Class ProbabilitySampler

java.lang.Object

org.apache.htrace.core.Sampler

org.apache.htrace.core.ProbabilitySampler

public class ProbabilitySampler
extends Sampler

Sampler that returns true a certain percentage of the time. Specify the frequency interval by configuring a double value for SAMPLER_FRACTION_CONF_KEY.

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.htrace.core.Sampler

Sampler.Builder

Field Summary

Fields

Modifier and Type	Field and Description
static String	SAMPLER_FRACTION_CONF_KEY
double	threshold

Fields inherited from class org.apache.htrace.core.Sampler

ALWAYS, NEVER

Constructor Summary

Constructors

Constructor and Description
ProbabilitySampler(HTraceConfiguration conf)

Method Summary

Methods

Modifier and Type	Method and Description
boolean	next()

Methods inherited from class java.lang.Object

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

Field Detail

threshold

public final double threshold

SAMPLER_FRACTION_CONF_KEY

public static final String SAMPLER_FRACTION_CONF_KEY

See Also:

Constant Field Values

Constructor Detail

ProbabilitySampler

public ProbabilitySampler(HTraceConfiguration conf)

Method Detail

next

public boolean next()

Specified by:

next in class Sampler