org.onlab.metrics

Interface MetricsService

All Known Implementing Classes:

MetricsManager

public interface MetricsService

Metrics Service to collect metrics.

Method Summary

Modifier and Type	Method and Description
com.codahale.metrics.Counter	createCounter(MetricsComponent component, MetricsFeature feature, String metricName) Creates a Counter metric.
com.codahale.metrics.Histogram	createHistogram(MetricsComponent component, MetricsFeature feature, String metricName) Creates a Histogram metric.
com.codahale.metrics.Meter	createMeter(MetricsComponent component, MetricsFeature feature, String metricName) Creates a Meter metric.
com.codahale.metrics.Timer	createTimer(MetricsComponent component, MetricsFeature feature, String metricName) Creates a Timer metric.
Map<String,com.codahale.metrics.Counter>	getCounters(com.codahale.metrics.MetricFilter filter) Fetches the existing Counters.
Map<String,com.codahale.metrics.Gauge>	getGauges(com.codahale.metrics.MetricFilter filter) Fetches the existing Gauges.
Map<String,com.codahale.metrics.Histogram>	getHistograms(com.codahale.metrics.MetricFilter filter) Fetches the existing Histograms.
Map<String,com.codahale.metrics.Meter>	getMeters(com.codahale.metrics.MetricFilter filter) Fetches the existing Meters.
com.codahale.metrics.MetricRegistry	getMetricRegistry() Fetches existing metric registry.
Map<String,com.codahale.metrics.Metric>	getMetrics() Fetches the existing metrics.
Map<String,com.codahale.metrics.Timer>	getTimers(com.codahale.metrics.MetricFilter filter) Fetches the existing Timers.
void	notifyReporters() Notifies the changes on metric registry to all registered reporters.
MetricsComponent	registerComponent(String name) Registers a component.
<T extends com.codahale.metrics.Metric> T	registerMetric(MetricsComponent component, MetricsFeature feature, String metricName, T metric) Registers an already created Metric.
void	registerReporter(MetricsReporter reporter) Registers a reporter to receive any changes on metric registry.
void	removeMatching(com.codahale.metrics.MetricFilter filter) Removes all Metrics that match a given filter.
boolean	removeMetric(MetricsComponent component, MetricsFeature feature, String metricName) Removes the metric with the given name.
void	unregisterReporter(MetricsReporter reporter) Unregisters the given metric reporter.

Method Detail

registerComponent

MetricsComponent registerComponent(String name)

Registers a component.

Parameters:

name - name of the Component to register

Returns:

MetricsComponent object that can be used to create Metrics.

getMetricRegistry

com.codahale.metrics.MetricRegistry getMetricRegistry()

Fetches existing metric registry.

Returns:

metric registry

createCounter

com.codahale.metrics.Counter createCounter(MetricsComponent component,
                                           MetricsFeature feature,
                                           String metricName)

Creates a Counter metric.

Parameters:

component - component the Counter is defined in

feature - feature the Counter is defined in

metricName - local name of the metric

Returns:

the created Counter Meteric

createHistogram

com.codahale.metrics.Histogram createHistogram(MetricsComponent component,
                                               MetricsFeature feature,
                                               String metricName)

Creates a Histogram metric.

Parameters:

component - component the Histogram is defined in

feature - feature the Histogram is defined in

metricName - local name of the metric

Returns:

the created Histogram Metric

createTimer

com.codahale.metrics.Timer createTimer(MetricsComponent component,
                                       MetricsFeature feature,
                                       String metricName)

Creates a Timer metric.

Parameters:

component - component the Timer is defined in

feature - feature the Timer is defined in

metricName - local name of the metric

Returns:

the created Timer Metric

createMeter

com.codahale.metrics.Meter createMeter(MetricsComponent component,
                                       MetricsFeature feature,
                                       String metricName)

Creates a Meter metric.

Parameters:

component - component the Meter is defined in

feature - feature the Meter is defined in

metricName - local name of the metric

Returns:

the created Meter Metric

registerMetric

<T extends com.codahale.metrics.Metric> T registerMetric(MetricsComponent component,
                                                         MetricsFeature feature,
                                                         String metricName,
                                                         T metric)

Registers an already created Metric. This is used for situation where a caller needs to allocate its own Metric, but still register it with the system.

Type Parameters:

T - Metric type

Parameters:

component - component the Metric is defined in

feature - feature the Metric is defined in

metricName - local name of the metric

metric - Metric to register

Returns:

the registered Metric

registerReporter

void registerReporter(MetricsReporter reporter)

Registers a reporter to receive any changes on metric registry.

Parameters:

reporter - metric reporter

unregisterReporter

void unregisterReporter(MetricsReporter reporter)

Unregisters the given metric reporter.

Parameters:

reporter - metric reporter

notifyReporters

void notifyReporters()

Notifies the changes on metric registry to all registered reporters.

removeMetric

boolean removeMetric(MetricsComponent component,
                     MetricsFeature feature,
                     String metricName)

Removes the metric with the given name.

Parameters:

component - component the Metric is defined in

feature - feature the Metric is defined in

metricName - local name of the metric

Returns:

true if the metric existed and was removed, otherwise false

getTimers

Map<String,com.codahale.metrics.Timer> getTimers(com.codahale.metrics.MetricFilter filter)

Fetches the existing Timers.

Parameters:

filter - filter to use to select Timers

Returns:

a map of the Timers that match the filter, with the key as the name String to the Timer.

getGauges

Map<String,com.codahale.metrics.Gauge> getGauges(com.codahale.metrics.MetricFilter filter)

Fetches the existing Gauges.

Parameters:

filter - filter to use to select Gauges

Returns:

a map of the Gauges that match the filter, with the key as the name String to the Gauge.

getCounters

Map<String,com.codahale.metrics.Counter> getCounters(com.codahale.metrics.MetricFilter filter)

Fetches the existing Counters.

Parameters:

filter - filter to use to select Counters

Returns:

a map of the Counters that match the filter, with the key as the name String to the Counter.

getMeters

Map<String,com.codahale.metrics.Meter> getMeters(com.codahale.metrics.MetricFilter filter)

Fetches the existing Meters.

Parameters:

filter - filter to use to select Meters

Returns:

a map of the Meters that match the filter, with the key as the name String to the Meter.

getHistograms

Map<String,com.codahale.metrics.Histogram> getHistograms(com.codahale.metrics.MetricFilter filter)

Fetches the existing Histograms.

Parameters:

filter - filter to use to select Histograms

Returns:

a map of the Histograms that match the filter, with the key as the name String to the Histogram.

getMetrics

Map<String,com.codahale.metrics.Metric> getMetrics()

Fetches the existing metrics.

Returns:

a map of the Metrics, with the key as the name String to the Histogram.

removeMatching

void removeMatching(com.codahale.metrics.MetricFilter filter)

Removes all Metrics that match a given filter.

Parameters:

filter - filter to use to select the Metrics to remove.