Package org.apache.cassandra.metrics

Class LatencyMetrics

java.lang.Object

org.apache.cassandra.metrics.LatencyMetrics

Direct Known Subclasses:

ClientRequestMetrics

public class LatencyMetrics
extends Object

Metrics about latencies

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
class	LatencyMetrics.LatencyMetricsTimer

Field Summary

Fields

Modifier and Type	Field	Description
protected final MetricNameFactory	aliasFactory
protected final MetricNameFactory	factory
final LatencyMetrics.LatencyMetricsTimer	latency	Latency
protected final String	namePrefix
final com.codahale.metrics.Counter	totalLatency	Total latency in micro sec

Constructor Summary

Constructors

Constructor	Description
LatencyMetrics(String type, String scope)	Create LatencyMetrics with given group, type, and scope.
LatencyMetrics(String type, String namePrefix, String scope)	Create LatencyMetrics with given group, type, prefix to append to each metric name, and scope.
LatencyMetrics(MetricNameFactory factory, String namePrefix)	Create LatencyMetrics with given group, type, prefix to append to each metric name, and scope.
LatencyMetrics(MetricNameFactory factory, String namePrefix, LatencyMetrics... parents)	Create LatencyMetrics with given group, type, prefix to append to each metric name, and scope.
LatencyMetrics(MetricNameFactory factory, MetricNameFactory aliasFactory, String namePrefix)

Method Summary

Modifier and Type	Method	Description
void	addNano(long nanos)	takes nanoseconds
void	release()

Methods inherited from class java.lang.Object

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

Field Details

latency

public final LatencyMetrics.LatencyMetricsTimer latency

Latency

totalLatency

public final com.codahale.metrics.Counter totalLatency

Total latency in micro sec

factory

protected final MetricNameFactory factory

aliasFactory

protected final MetricNameFactory aliasFactory

namePrefix

protected final String namePrefix

Constructor Details

LatencyMetrics

public LatencyMetrics(String type,
 String scope)

Create LatencyMetrics with given group, type, and scope. Name prefix for each metric will be empty.

Parameters:

type - Type name

scope - Scope

LatencyMetrics

public LatencyMetrics(String type,
 String namePrefix,
 String scope)

Create LatencyMetrics with given group, type, prefix to append to each metric name, and scope.

Parameters:

type - Type name

namePrefix - Prefix to append to each metric name

scope - Scope of metrics

LatencyMetrics

public LatencyMetrics(MetricNameFactory factory,
 String namePrefix)

Create LatencyMetrics with given group, type, prefix to append to each metric name, and scope.

Parameters:

factory - MetricName factory to use

namePrefix - Prefix to append to each metric name

LatencyMetrics

public LatencyMetrics(MetricNameFactory factory,
 MetricNameFactory aliasFactory,
 String namePrefix)

LatencyMetrics

public LatencyMetrics(MetricNameFactory factory,
 String namePrefix,
 LatencyMetrics... parents)

Create LatencyMetrics with given group, type, prefix to append to each metric name, and scope. Any updates to this will also run on parent

Parameters:

factory - MetricName factory to use

namePrefix - Prefix to append to each metric name

parents - any amount of parents to replicate updates to

Method Details

addNano

public void addNano(long nanos)

takes nanoseconds

release

public void release()